CN107089726B - Wastewater treatment reactor and wastewater treatment process method - Google Patents
Wastewater treatment reactor and wastewater treatment process method Download PDFInfo
- Publication number
- CN107089726B CN107089726B CN201710454534.5A CN201710454534A CN107089726B CN 107089726 B CN107089726 B CN 107089726B CN 201710454534 A CN201710454534 A CN 201710454534A CN 107089726 B CN107089726 B CN 107089726B
- Authority
- CN
- China
- Prior art keywords
- tank
- anaerobic
- wastewater
- water
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 109
- 230000008569 process Effects 0.000 title claims abstract description 88
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 53
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 207
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 89
- 230000003647 oxidation Effects 0.000 claims abstract description 88
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 83
- 239000002351 wastewater Substances 0.000 claims abstract description 83
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000004176 ammonification Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 126
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- 239000001301 oxygen Substances 0.000 claims description 29
- 238000005273 aeration Methods 0.000 claims description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 238000007034 nitrosation reaction Methods 0.000 claims description 21
- 239000000945 filler Substances 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 20
- 239000010802 sludge Substances 0.000 claims description 20
- 230000009935 nitrosation Effects 0.000 claims description 18
- 241000894006 Bacteria Species 0.000 claims description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 13
- 239000011574 phosphorus Substances 0.000 claims description 13
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 230000012010 growth Effects 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 125000001477 organic nitrogen group Chemical group 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 239000010865 sewage Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000005842 biochemical reaction Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000004060 metabolic process Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000006065 biodegradation reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 241001453382 Nitrosomonadales Species 0.000 description 2
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 2
- 230000001651 autotrophic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the field of wastewater, and particularly discloses a wastewater treatment reactor and a wastewater treatment process method. The wastewater treatment reactor is sequentially provided with an anaerobic tank, an anoxic tank, a fan-shaped anaerobic ammonia oxidation tank and an aerobic tank along the flowing direction of wastewater, so that a combined process of 'pre-ammonification/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment' is formed. The reactor and the process method for treating the wastewater have the advantages of high wastewater treatment efficiency, good denitrification and dephosphorization effects and easily controlled and adjusted reaction conditions.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a wastewater treatment reactor and a wastewater treatment process method.
Background
Anammox is an Anaerobic ammonium oxidation (Anammox) with Nitrite (NO) under anoxic conditions2 -) Introduction of ammonia (NH) as an electron acceptor4 +) Conversion to nitrogen (N)2) Simultaneously fixing CO by taking nitrite as electron donor2And produce Nitrate (NO)3 -) The biological process of (1). The microorganism that performs this process is called Anaerobic Ammonia Oxidizing Bacteria (AAOB).
The biological rotating disc is one of the biological sewage treating technology with biomembrane process, and is used in irrigation of sewage and artificial strengthening of land treatment.
Anaerobic ammoniaOxidation is a novel denitrification process, and is divided into a SHARON-ANAMMOX process, a CANON process and an OLAND process. The SHARON-ANAMMOX process is first nitrified to remove NO in the influent water of ANAMMOX2 -/NH4 +The requirement of concentration ratio is very strict, and basically controlled to be about 1.20-1.35, so that the control of the nitration degree of the SHARON section is very strict. The impact load of the reactor generally includes both concentration impact and hydraulic impact load. The ANAMMOX section is not resistant to impact load because the control conditions are harsh and the biochemical treatment system is very sensitive. The CANON process and the OLAND process are generally designed as a reactor, but both processes have a nitrosation process and then enter an anammox stage, and both nitrosation control and anammox are realized in one reactor. In the actual process, oxygen and NH are dissolved in the wastewater4 +Degree of nitrosation and NO2 -/NH4 +The concentration ratio is difficult to regulate.
Disclosure of Invention
The invention aims to provide a wastewater treatment reactor, the condition of the biological reaction of the reactor is easy to control, a combined process of 'pre-ammoniation/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment' is formed, the wastewater treatment efficiency of the reactor and the combined process is high, and the effects of nitrogen and phosphorus removal are good.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a wastewater treatment reactor is provided with a circular tank body, the tank body comprises an inner ring tank and an outer ring tank, and an annular confluence groove and an annular water collection groove are arranged between the inner ring tank and the outer ring tank; the outer ring tank is sequentially divided into an anaerobic tank, an anoxic tank and an anaerobic ammonia oxidation tank according to the flow direction of water flow; the anaerobic tank and the anoxic tank are both in an annular gallery type on the whole, and the anaerobic ammonia oxidation tank is in a fan-shaped type. The total inlet tube is located the start end in anaerobism pond, is provided with underwater propulsor on the pool wall in anaerobism pond, strengthens rivers and flows, is provided with the fixed filler that is used for cultivateing anaerobism mud in the anaerobism pond, and the anaerobism pond communicates in the annular groove that converges, and partial play water flows in the annular groove that converges. Be provided with rotatable shunt gate between anaerobism pond and the oxygen deficiency pond, rotate through drive mechanism the shunt gate rotates the position that needs and fixes with the shunt gate, and the shunt gate segmentation the play rivers in anaerobism pond, the shunt gate has carries out the function shunted with the play water in anaerobism pond, and the shunt gate is located the waste water entering annular that barricade one side and converges the groove, and the waste water entering oxygen deficiency pond of shunt gate opposite side. Part of effluent of the anaerobic tank flows into the anoxic tank; the interior of the anoxic tank is divided into 3 galleries, the bottom of the anoxic tank is provided with a first aeration system, and the effluent of the anoxic tank flows into the annular confluence groove. The annular confluence groove collects the effluent of the anaerobic tank and the anoxic tank, and the tank body further comprises a water delivery pipe and a transfer pump, so that the wastewater converged in the annular confluence groove can be transferred to the anaerobic ammonia oxidation tank. A plurality of groups of biological rotating discs for treating wastewater are arranged in the anaerobic ammonia oxidation tank, an annular water inlet channel is arranged on the periphery of the anaerobic ammonia oxidation tank, and a plurality of water inlet branch pipes are arranged on the annular water inlet channel; the water outlets of the water inlet branch pipes are communicated with the annular water channel; the water inlets of the water inlet branch pipes are communicated with the water delivery pipe. The annular water collecting tank collects the wastewater treated by the anaerobic ammonia oxidation tank through the outflow of the orifice; the water storage level of the anaerobic ammonia oxidation tank is two thirds to three quarters of the height of the disc of the installed biological rotating disc. The inner annular tank is an aerobic tank, the inlet water of the aerobic tank comes from the annular water collecting tank, the bottom of the aerobic tank is provided with a second aeration device, and the aerobic tank is communicated with the total water outlet tank.
In a preferred embodiment of the invention, suspended fillers for providing carriers for the growth of the biofilm are arranged between each two groups of biological rotating discs, and each group of biological rotating discs is arranged to rotate anticlockwise when viewed from the outer side of the wastewater treatment reactor.
In a preferred embodiment of the invention, the suspension filler comprises a spherical shell and a carrier arranged in the shell and used for fixing a biological membrane, the diameter of the shell is 10-30 mm and is greater than the distance between every two discs of each group of biological rotating discs, the shell is formed by injection molding of a high molecular polymer, and the high molecular polymer is polypropylene or polyethylene; the material of the built-in carrier is a porous material with the specific gravity less than 1, and the density of the porous material is 0.90-0.96 g/cm3。
In a preferred embodiment of the invention, a third aeration device is arranged at the bottom of the anaerobic ammonia oxidation tank, and the aeration device adopts an intermittent aeration mode.
In the preferred embodiment of the present invention, the rotation angle of the shunt door, i.e. the included angle between the shunt door and the retaining wall, is in the range of 30-150 °.
A process for treating wastewater utilizes the wastewater treatment reactor to treat wastewater, and forms a combined process of pre-ammonification/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment: the anaerobic tank forms an anaerobic section, mainly cultures anaerobic ammoniated flora, converts organic nitrogen into ammonia nitrogen, and controls the dissolved oxygen of the anaerobic section at 0-0.2 mg/L; the anaerobic tank forms an anoxic section for culturing facultative nitrosation flora, and the dissolved oxygen in the anoxic section is controlled at 0.2-2.0mg/L for nitrosation biological reaction in the anoxic section to remove NH4 +Conversion to NO2 -(ii) a The anaerobic ammonia oxidation tank forms an anaerobic ammonia oxidation section, mainly cultures anaerobic ammonia oxidation flora, and the dissolved oxygen of the anaerobic ammonia oxidation section is controlled to be 0.3-1.0mg/L so as to carry out biological reaction of anaerobic ammonia oxidation; culturing the activated sludge in an aerobic section to mainly remove organic substances in water, and excessively absorbing inorganic phosphorus in the water by phosphorus accumulating bacteria under an aerobic condition, wherein the dissolved oxygen of the aerobic section is controlled to be more than 2.0 mg/L.
In the preferred embodiment of the invention, the flow ratio of the anaerobic pool entering the anoxic pool and the annular confluence groove is adjusted by controlling the rotation angle, so as to control NO in the wastewater after the annular confluence groove converges2 -/NH4 +Concentration ratio of NO entering anammox section of the body2 -/NH4 +The concentration ratio is in the range of 1.20-1.35.
In the preferred embodiment of the present invention, the nitrogen removal load of the integrated process for treating wastewater is 3.0-5.0 kgN/(m)3.d)。
The wastewater treatment reactor and the wastewater treatment process have the following beneficial effects:
1. the reactor provided by the invention has unique arrangement and optimized structureNO in wastewater from anammox section of main body2 -/NH4 +The concentration ratio is easy to control, and the efficiency of biological denitrification treatment is improved.
2. The biological rotating disc is arranged in a fan-shaped arrangement mode, fan-shaped water inlet is realized, and the problem that the starting rotating disc of the biological rotating disc in the prior art is overloaded is greatly solved. The guide action of the fan-shaped inlet water and the rotation of the rotating disc forms mixed flow superior to common plug flow in the reactor, the hydraulic condition is good, the volume utilization rate of the biological rotating disc is high, and the biological treatment efficiency of the wastewater treatment reactor is improved.
In the anaerobic ammonia oxidation section, the biological rotating disc is combined with the process characteristics of moving bed biological membranes, the biological rotating disc is combined with the suspended filler treatment, the number of the biological membranes in unit volume is increased, the biodegradation capacity is enhanced, the biological treatment efficiency is improved, and the overall pollutant removal efficiency of the reactor is improved.
The wide-mouth water inlet and the narrow-mouth water outlet enable the biological rotating disc to accelerate the falling and metabolism of the biological membrane. The anaerobic ammonia oxidation section adopts a biological rotating disc process, so that the sludge age is long, the energy consumption is low, and the oxygen demand is reduced by 50-60% during anaerobic ammonia oxidation denitrification.
4. The process method for treating the wastewater provided by the invention has the advantages of reasonable process route, clear and ordered treatment mechanism and high nitrogen and phosphorus removal efficiency. NO for anaerobic ammonia oxidation section of main body2 -/NH4 +The concentration ratio is easy to control, and the efficiency of biological denitrification treatment is improved.
5. The process method for treating wastewater provided by the invention combines a large number of experiments to screen an optimal combined process method, orderly and organically combines pre-ammoniation/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment, and each section supports each other on the regulation and control function, thereby providing a new concept scheme for wastewater denitrification and dephosphorization treatment. The combined overall process method is more efficient, more economical and more stable. The process is stable and reliable in operation and resistant to impact load. The method has the advantages of low sludge yield, low sludge treatment cost and good sewage treatment effect, and has important significance for environmental protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a wastewater treatment reactor from a first perspective according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wastewater treatment reactor from a second perspective according to an embodiment of the present invention;
FIG. 3 is a schematic view of a wastewater flow direction from a first perspective when wastewater is treated in a wastewater treatment reactor according to an embodiment of the present invention;
FIG. 4 is a schematic view of the wastewater flow from a second perspective when the wastewater treatment reactor provided by the embodiment of the present invention is used for treating wastewater.
Icon: 100-a wastewater treatment reactor; 110-inner ring pool; 111-an aerobic tank; 112-total effluent trough; 120-outer ring pool; 121-an anaerobic tank; 122-anoxic tank; 123-anaerobic ammonia oxidation tank; 124-corridor; 125-rotating biological disc; 126-annular water inlet channel; 127-a water inlet branch pipe; 128-water conveying pipe; 129-suspended filler; 130-an annular convergence slot; 140-annular water collecting tank; 150-fixed packing; 160-total water inlet pipe; 161-underwater propulsion; 170-a shunt gate; 180-a first aeration device; 181-a second aeration device; 182-a third aeration device; 183-transfer pump; 184-a transmission mechanism; 185-retaining wall.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present embodiment provides a wastewater treatment reactor 100.
Referring to fig. 1 and 2, a wastewater treatment reactor 100 is configured as a circular tank body, and the tank body includes an inner annular tank 110 and an outer annular tank 120. An annular confluence groove 130 and an annular catch basin 140 are provided between the inner annular pool 110 and the outer annular pool 120. The outer ring tank 120 is sequentially divided into an anaerobic tank 121, an anoxic tank 122 and an anaerobic ammonia oxidation tank 123 according to the flow direction of water flow; the whole anaerobic tank 121 and the whole anoxic tank 122 are in an annular gallery shape, and the anaerobic ammonia oxidation tank 123 is in a fan shape.
The wastewater treatment reactor 100 provided above is used for wastewater treatment with a higher degree of pollution. Specifically, COD, ammonia nitrogen and total phosphorus in the wastewater before treatment are respectively 500-1000 mg/L, 100-200 mg/L and 5-10 mg/L, and the COD, ammonia nitrogen and total phosphorus in the wastewater after treatment by adopting the wastewater treatment reactor 100 are respectively 50-80 mg/L, 10mg/L and 1.0 mg/L. (the effluent COD value after the reactor treatment generally refers to the effluent COD determination value after the subsequent precipitation unit, and other indexes are the same.) the wastewater treatment reactor 100 provided by the embodiment can effectively treat wastewater, and has a remarkable treatment effect.
Further, part of the effluent of the anaerobic tank 121 flows into the anoxic tank 122; the interior of the anoxic tank 122 is divided into 3 galleries 124, the bottom of the anoxic tank 122 is provided with a first aeration system, and the effluent of the anoxic tank 122 flows into an annular confluence groove 130. The more subdivided galleries 124 can extend the treatment time of the water stream in the anoxic tank 122. Micro-aeration is carried out in the anoxic tank 122, and the dissolved oxygen of the anoxic tank 122 is controlled to be 0.2-2.0mg/L, so that the biological reaction of nitrosation in the anoxic tank 122 is ensured, and most of ammonia nitrogen in the wastewater entering the anoxic tank 122 is converted into nitrite nitrogen. The aeration quantity of micro aeration is adjusted through a valve, and the dissolved oxygen is controlled to be 0.2-2.0mg/L by combining with an online dissolved oxygen tester.
The total water inlet pipe 160 is located at the starting end of the anaerobic tank 121, an underwater propeller 161 is arranged on the wall of the anaerobic tank 121 and used for enhancing water flow, a fixed filler 150 used for culturing anaerobic sludge is arranged in the anaerobic tank 121, the anaerobic tank 121 is communicated with the annular flow converging groove 130, and part of the outlet water flows into the annular flow converging groove 130.
The annular confluence groove 130 collects the effluent of the anaerobic tank 121 and the anoxic tank 122, and the tank body further comprises a water conveying pipe 128 and a transfer pump 183, so that the wastewater collected in the annular confluence groove 130 can be transferred to the anaerobic ammonia oxidation tank 123.
It should be understood that the inner annular tank 110 and the outer annular tank 120 described above merely mean that the inner annular tank 110 and the outer annular tank 120 are formed by the wastewater treatment reactor 100 according to the embodiment of the present invention, with respect to a circular tank body, in the wastewater flow, and are not suitable for understanding other fields.
Referring to fig. 1, 3 and 4, a rotatable diversion gate 170 is disposed between the anaerobic tank 121 and the anoxic tank 122, the diversion gate 170 is rotated to divide the effluent flow of the anaerobic tank 121, the diversion gate 170 has a function of diverting the effluent of the anaerobic tank 121, the wastewater inside the diversion gate 170 enters the annular confluence groove 130, and the wastewater outside the diversion gate 170 enters the anoxic tank 122.
It should be noted that a pipe valve of an aeration device may be disposed on the periphery of the anaerobic tank 121 and the anoxic tank 122. The wastewater in the peripheral annular inlet channel 126 of the anammox tank 123 flows into the anammox tank 123 via an overflow weir.
With continued reference to FIG. 1, further, the rotation angle of the diverter gate 170 (i.e., the angle α shown in FIG. 1, i.e., the angle between the diverter gate 170 and the retaining wall 185) is in the range of 30 to 150. preferably, the rotation angle of the diverter gate 170 is selected to be 90. the flow rate ratio of the wastewater entering the anoxic tank 122 (nitrosation) and the annular manifold 130 on both sides of the diverter gate 170 is preferably controlled to be about 1: 1. the NH is contained in the wastewater entering the annular manifold 1304 +The ammonia nitrogen in the wastewater entering the anoxic tank 122 is mostly converted into nitrite nitrogen through a nitrosation biological reaction and then flows into the annular confluence tank 130. The two waste waters are joined in an annular confluence groove 130, and NO of the waste water at the end of the annular confluence groove 1302 -/NH4 +The concentration ratio is preferably in the range of 1.20 to 1.35.
If the waste water NO at the end of the annular confluence groove 1302 -/NH4 +If the concentration ratio is less than 1.2, the ammonia nitrogen is more, the diversion gate 170 rotates towards one side of the retaining wall 185, the rotation angle is reduced, so that the wastewater entering the anoxic tank 122 for nitrosation is increased, the ammonia nitrogen directly entering the annular confluence groove 130 from the anaerobic tank 121 is reduced, and the elimination is fast, the NO in the wastewater at the tail end of the annular confluence groove 130 is reduced2-/NH4 +The concentration ratio is more than or equal to 1.2. If the waste water NO at the end of the annular confluence groove 1302 -/NH4 +If the concentration ratio is greater than 1.35, the ammonia nitrogen content of the wastewater at the tail end of the annular confluence groove 130 is less, the shunt door 170 is rotated outwards to increase the rotation angle, so that the wastewater entering the anoxic tank 122 for nitrosation is reduced, the ammonia nitrogen content directly entering the annular confluence groove 130 from the anaerobic tank 121 is increased, and the NO content in the wastewater at the tail end of the annular confluence groove 130 is also increased2 -/NH4 +The concentration ratio is less than or equal to 1.35.
Anaerobic ammonia oxidation section of common reactor to NO2 -/NH4 +The requirement of concentration ratio is very strict and transient change is difficult to regulate. NO in wastewater2 -/NH4 +The concentration ratio is lack of effective and feasible regulation and control means and can only depend on strict dissolved oxygen control. But NO in the wastewater2 -/NH4 +The concentration ratio finally depends on the degree of the ammoniation reaction and the nitrosation reaction which are carried out firstly, the reaction degree of the 2 reactions can be partially regulated and controlled by controlling the dissolved oxygen in the wastewater, and the NO in the wastewater can be indirectly regulated and controlled2 -/NH4 +Concentration ratio, but can not directly regulate and control NO in wastewater2 -/NH4 +Concentration ratio. This means that even if strict precise regulation of dissolved oxygen in wastewater is achieved, NO in wastewater cannot be directly achieved2 -/NH4 +And (5) accurately regulating and controlling the concentration ratio.
NO regulation by setting the shunt gate 170 described above2 -/NH4 +Concentration ofRatios, assist in controlling conditions with looser and easily achieved dissolved oxygen for each cell. It can be seen that the wastewater treatment reactor 100 provided by the embodiment of the present invention is suitable for the NO of the anammox tank 123 of the main body2 -/NH4 +The concentration ratio is easy to control, and NO can be ensured2 -/NH4 +The concentration ratio is within the range of 1.20-1.35 in the optimized concentration ratio for a long time, so that the anaerobic ammonia oxidation tank 123 of the reactor is in high-efficiency biological treatment, and the efficiency of biological denitrification treatment is improved.
The diverter valve 170 is made of reinforced concrete or metal, so that the diverter valve is heavy, cannot be pushed by the impact force of water flow, and only the diverter valve 170 is driven to rotate by the transmission mechanism 184. It should be understood that the specific structure of the above-described implementation of the rotation of the diverter gate 170 is not limiting herein. The specific structure of the rotation of the diverter gate 170 may be selected from a transmission mechanism commonly found in the art. In the present embodiment, the transmission mechanism 184 may select a motor and a planetary gear assembly, and the shunt door 170 is in transmission connection with the planetary gear assembly, so as to ensure that the shunt door 170 rotates to the set angle accurately. The transmission principles of the motor and planetary gear assembly are well known to those skilled in the art and will not be described in detail herein.
Further, the anammox tank 123 is in a fan-shaped pattern. A plurality of biological rotating discs 125 for treating the wastewater are arranged in the anaerobic ammonia oxidation tank 123, an annular water inlet channel 126 is arranged on the periphery of the anaerobic ammonia oxidation tank 123, and a plurality of water inlet branch pipes 127 are arranged on the annular water inlet channel 126; the water outlets of the water inlet branch pipes 127 are communicated with the annular water channel; the water inlets of the water inlet branch pipes 127 are communicated with the water conveying pipe 128. The annular water collection tank 140 collects the wastewater treated by the anammox tank 123 via the outlet flow. The inner annular tank 110 is an aerobic tank 111, the inlet water of the aerobic tank 111 comes from the annular water collecting tank 140, the bottom of the aerobic tank 111 is provided with a second aeration device 181, and the aerobic tank 111 is communicated with the main water outlet tank 112. The anaerobic ammonia oxidation tank 123 adopts the biological rotating disc 125 to process sewage, so that the sludge is long in age and low in energy consumption. And when anaerobic ammonia oxidation denitrification is adopted, compared with denitrification, the oxygen demand is reduced by 50-60%, and an external carbon source is not required. The bottom of the anaerobic ammonia oxidation tank 123 is provided with a third aeration device 182, and the third aeration device 182 adopts an intermittent aeration mode.
The arrangement of each section is compact, and the arrangement of the flow dividing door 170, the annular confluence groove 130, the fan-shaped anaerobic ammonia oxidation tank 123, the aerobic tank 111 and the like is exquisite and optimized. The adoption of annular and shunt arrangement ingeniously solves the problems of diversion and confluence of a plurality of sections, and each section of the wastewater treatment reactor 100 is reasonable in arrangement, optimized in structure and unique in type.
Furthermore, each plate of the plurality of biological rotating plates 125 disposed inside the anaerobic ammonia oxidation tank 123 is attached with a biological membrane, so as to treat the wastewater. Because the annular water inlet channel 126 evenly distributes the inflow water to arrange a large amount of original wastewater to the extension of the whole anaerobic ammonia oxidation tank 123, the water flow of the water inlet channel per unit length is greatly reduced compared with other reactors, and the problem of overlarge load of the starting-end rotating discs of the biological rotating discs 125 is greatly improved (the starting-end rotating discs refer to a plurality of rotating discs which are firstly contacted with the wastewater in each group of biological rotating discs along the flow direction of the water flow).
Preferably, the depth of the annular inlet channel 126 is 0.2-0.3 m. Thereby further reducing the water flow per unit length of the water inlet channel and further improving the problem of excessive load on the starting turntable of the biological turntable 125.
Further, the storage water level of the anammox tank 123 is two-thirds to three-fourths of the height of the disk of the installed bio-disc 125. Thereby ensuring partial oxygenation process of the biological rotating disk 125 and being beneficial to maintaining the concentration of dissolved oxygen in the anaerobic ammonia oxidation tank 123.
Preferably, in this embodiment, the biological rotating disks 125 are each configured to rotate counterclockwise as viewed from the outside of the wastewater treatment reactor 100.
Referring to fig. 1, further, a suspension packing 129 for providing a carrier for the growth of the biofilm is disposed between each two groups of bio-discs 125. Since the plurality of biological rotating discs 125 inside the anammox tank 123 are also arranged in a fan shape as a whole, a fan-shaped gap is left between each two biological rotating discs 125. By disposing the floating packings 129 in the respective gaps, the above-described respective fan-shaped gaps can be fully utilized, and the effect of the overall wastewater treatment and the wastewater treatment efficiency of the wastewater treatment reactor 100 can be further improved. The water is evenly distributed through the annular water inlet channel 126, so that a large amount of waste water is originally distributed to the extension of the whole anaerobic ammonia oxidation tank 123, and the water flow rate of the annular water inlet channel 126 per unit length is greatly reduced compared with that of the traditional biological rotating disk reactor. Greatly improving the problem of overlarge load of the rotating disc at the starting end of the biological rotating disc.
In the above, the suspension packing 129 includes a spherical shell and a carrier of the biological membrane disposed in the shell, and the diameter of the shell is larger than the distance between every two disks of each set of biological rotating disks 125. Thereby effectively preventing the suspended filler 129 from being jammed between the disks and affecting the normal operation of the bio-disc 125. Specifically, the suspension filler 129 is composed of a grid spherical shell and a built-in carrier, the shell is formed by injection molding of high molecular polymer, the built-in carrier is a porous material with the specific gravity less than 1, and the density is 0.90-0.96 g/cm3The diameter of the filler is 10-30 mm, and the material is polypropylene or polyethylene. By providing the above-described floating packing 129, the bio-disc 125 and the floating packing 129 work together, and thus, the problem of an excessive load on the bio-disc 125 at the start of the bio-disc 125 process can be further improved.
It should be understood that the specific shape of the suspended filler 129 described above is not limiting. The shape of the suspension packing 129 can be selected from the spherical shell provided in the embodiment, and can also be selected from other shapes, such as a cube, a cuboid, or other suitable shapes processed according to actual needs.
In conclusion, in the anaerobic ammonia oxidation tank 123, the biological rotating discs 125 arranged in a fan-shaped arrangement manner realize fan-shaped water inlet, and the problem that the starting rotating discs of the biological rotating discs in the prior art are overloaded is greatly improved. The water flow per unit length of the annular water inlet channel 126 is greatly reduced compared with other reactors because the annular water inlet channel 126 evenly distributes the water to the whole anaerobic ammonia oxidation tank 123. Meanwhile, the biological rotating discs 125 are filled with the suspended fillers 129, and the biological rotating discs 125 and the suspended fillers 129 act together, so that the problem of overlarge load of the rotating discs at the starting ends of the biological rotating discs 125 is greatly improved. The diversion action of the fan-shaped inlet water and the rotation of the biological rotating disk 125 forms mixed flow superior to common plug flow in the reactor, and the hydraulic condition is good. The biological rotating discs 125 rotate anticlockwise when viewed from the outer side, and the rotation of the biological rotating discs 125 in the same direction can bring about the diversion effect on the treated water flow. The diversion of the fan-shaped influent to the rotation of the biological rotating disk 125 is essentially a 2-fold vertical effect, resulting in a mixed flow that is superior to conventional plug flow. Meanwhile, the non-uniformity of multi-point water inflow is compensated by the flow guiding effect of the rotating biological rotating disc 125. The water inlet load can be homogenized and distributed on the whole reactor, the load of the starting turntable is reduced, and the utilization rate of the subsequent biological turntable 125 is improved, so that the volume utilization rate of the anaerobic ammonia oxidation tank 123 is improved, and the biological treatment efficiency of the anaerobic ammonia oxidation tank 123 can be improved by 10-20%.
The biological rotating disk 125 combines the process characteristics of moving bed biological membranes, the biological rotating disk 125 is combined with the treatment of the suspended filler 129, the number of the biological membranes in unit volume is increased, the biodegradation capacity is enhanced, the biological treatment efficiency is improved, and the overall pollutant removal efficiency of the reactor is improved.
The wide-mouth water inlet and the narrow-mouth water outlet enable the anaerobic ammonia oxidation tank 123 to accelerate the shedding and metabolism of the biological membrane. The efficiency and the effect of the anaerobic ammonia oxidation tank 123 are improved. "wide-mouth water inlet and narrow-mouth water outlet" means that the annular water inlet channel 126 is adopted for water inlet, the orifice of the annular water collecting groove 140 is used for outflow, and the large periphery is contracted to the annular water collecting groove 140 of the inner ring for water outlet, so that the water flow load of the unit length on the annular water collecting groove 140 is multiplied by the water flow load of the unit length on the water inlet channel, and therefore, water flow disturbance exists, and the shearing and impacting effects are exerted on the biological membrane; meanwhile, the restriction of the suspended filler 129 can be broken, and the water flows to the annular water collecting tank 140. The third aeration device 182 arranged at the bottom of the anaerobic ammonia oxidation tank 123 adopts intermittent aeration to provide oxygen for the biological film on the suspended filler 129; meanwhile, the water flow shearing and disturbing effects are realized, and the metabolism of the suspended biological membrane and the biological membrane on the disc is promoted; under aerobic conditions, the generated excessive biological membranes are further consumed, and the problems of excessive growth of the biological membranes of the biological rotating disk 125 and the like are improved.
The CANON process is a combination of the SHARON process and the ANAMMOX process. The CANON process is economical and efficient, and is particularly suitable for treating high-ammonia nitrogen and low-organic carbon sewage. As the microorganisms involved in the CANON process are autotrophic bacteria, no additional carbon source is needed. In addition, the whole nitrogen removal process is carried out in a single and micro-aerated reactor, thereby greatly reducing the occupied area and the energy consumption. Compared with the traditional denitrification process, the process can reduce the oxygen supply amount by 50-60% and reduce the carbon source by 100%.
With continued reference to fig. 1, the anaerobic tank 121 is used to culture the anaerobic sludge immobilized packing 150. Thereby resulting in a small sludge yield and a low sludge treatment cost, and further resulting in a good sewage treatment effect of the wastewater treatment reactor 100.
Further, a main water inlet pipe 160 of the wastewater treatment reactor 100 is disposed at the anaerobic tank 121, and an underwater propeller 161 is disposed at the main water inlet pipe 160.
The embodiment also provides a process for treating wastewater, which utilizes the wastewater treatment reactor 100 to perform wastewater treatment. The combined process of 'pre-ammoniation/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment' is formed: the anaerobic tank 121 forms an anaerobic section, mainly cultures anaerobic ammoniated flora, converts organic nitrogen into ammonia nitrogen, and controls the dissolved oxygen of the anaerobic section at 0-0.2 mg/L; the anaerobic tank 121 forms an anoxic section for culturing facultative nitrosation flora, and the dissolved oxygen in the anoxic section is controlled to be 0.2-2.0mg/L for nitrosation biological reaction in the anoxic section to remove NH4 +Conversion to NO2 -(ii) a The anaerobic ammonia oxidation tank 123 forms an anaerobic ammonia oxidation section, mainly cultures anaerobic ammonia oxidation flora, and the dissolved oxygen of the anaerobic ammonia oxidation section is controlled to be 0.3-1.0mg/L so as to carry out biological reaction of anaerobic ammonia oxidation; culturing the activated sludge in an aerobic section to mainly remove organic substances in water, and excessively absorbing inorganic phosphorus in the water by phosphorus accumulating bacteria under an aerobic condition, wherein the dissolved oxygen of the aerobic section is controlled to be more than 2.0 mg/L.
Further, the flow ratio of the anaerobic tank 121 entering the anoxic tank 122 and the annular confluence groove 130 is adjusted by controlling the rotation angle (the included angle between the diversion door 170 and the retaining wall 185), so as to control NO in the wastewater after the annular confluence groove 130 converges2 -/NH4 +Concentration ratio of NO entering anammox section of the body2 -/NH4 +The concentration ratio is in the range of 1.20-1.35.
Further, the integral process of the process for treating wastewater has a nitrogen removal load of 3.0-5.0 kgN/(m)3.d)。
In general, the basic principle of the process for treating wastewater by the wastewater treatment reactor 100 is as follows:
the anaerobic ammonia oxidation section adopts a short-path CANON process. The wastewater is subjected to anaerobic ammonia oxidation in an anaerobic ammonia oxidation section by virtue of anaerobic ammonia oxidation bacteria cultured on a biological rotating disk and a suspended filler, and NH is added4 +And NO2 -Performing anaerobic ammonia oxidation biochemical reaction as reactant to convert into N2This is the predominant reaction that occurs. NO2 -Can also be used as electron donor in microbial synthesis, CO2Is an electron acceptor, NO is produced in this process2 -Quilt CO2Oxidation to NO3 -。
The feed water of the common CANON process is raw water, and NO in the water is obtained through ammoniation and nitrosation2 -/NH4 +The concentration ratio is already substantially close to 1. Then anaerobic ammonia oxidation is carried out. The interaction of aerobic bacteria and anaerobic ammonium oxidation bacteria under the condition of limited oxygen leads NH4 +Complete conversion to N2With a small amount of NO3 -And (4) generating. The whole process is autotrophic, and no additional carbon source is needed. Feed water pair NH of CANON process4 +And NO2 -Is inherently undesirable.
The inlet water of the short-path CANON process is wastewater merged by anaerobic section ammoniation and anoxic section nitrosation, and NO is regulated and controlled2 -/NH4 +The concentration ratio is in the range of 1.20-1.35. The short-range CANON process essentially only requires the addition of NH4 +And NO2 -The anaerobic ammonium oxidation biochemical reaction is carried out as a reactant, the biochemical reaction process is shortened, and the biological treatment efficiency and treatment load are improved. The whole process has nitrogen removing load of 3.0-5.0 kgN/(m)3And d). The total nitrogen removal rate is more than 90 percent, and the ammonia nitrogen removal rate is more than 95 percent.
In the short-range CANON process, because of NO2 -/NH4 +The concentration ratio is proper, the nitrosation process is omitted, and the biochemical reaction can be directly carried out under the action of anaerobic ammonium oxidation bacteria:
NH4 ++1.32NO2 -+0.066HCO3 -+0.13H+→1.02N2+0.26NO3 -+0.066CH2O0.5N0.15+2.03H2O
the biofilm reactor has the strongest capability of resisting the impact of the matrix concentration and is stronger than a granular sludge bed reactor. The resistance to hydraulic load impingement is also strongest in various reactors. The matrix concentration impact resistance of the rotating biological disk combined with the moving bed is better than that of a common biological membrane reactor.
And for NO2 -/NH4 +The short-range CANON process also has certain buffering capacity for waste water with concentration ratio exceeding the range. Even if NO is2 -/NH4 +The concentration ratio range is less than 1.20 in a short time, the short-range CANON process has certain buffer capacity, and NH is introduced when water enters4 +When the height is higher, part of aerobic bacteria in the short-range CANON process can still smoothly carry excessive NH4 +By oxidation to NO2 -Further carrying out anaerobic ammonia oxidation biochemical reaction. This is because the biofilm on the rotating biological disk is partially in contact with air, and aerobic nitrifying bacteria and nitrosobacteria are present. The disc is used as a carrier of microorganism, a certain anaerobic zone and an aerobic zone are formed on the rotary disc in the formation process of a biological film, the microorganism generates nitrosation reaction in the aerobic zone, and anaerobic ammonia oxidation occurs in the anaerobic zoneReaction, namely, in an aerobic zone NH on the outer layer of the biological rotating disk4 +Is partially oxidized to NO2 -(ii) a Unreacted NH4 +And NO produced2 -(ii) a Enters an inner anaerobic zone to further react to release nitrogen and a small amount of NO2 -(ii) a Further oxidation to NO3 -And provides necessary electrons for the growth of microorganisms.
In the invention, only the water inlet NO of the short-range CANON process needs to be paid attention to2 -/NH4 +When the concentration ratio is more than 1.35, attention is paid to adjustment through a shunt gate, NO2 -Not too long. The strict degree of the limit requirement for the dissolved oxygen of the ammoniation section of the anaerobic section is greatly reduced. The anaerobic section is mainly ammonifying bacteria, the anoxic section is mainly nitrosification bacteria, and the anaerobic ammonia oxidation section is mainly anammox bacteria without being mixed with a large amount of other bacteria. Thus, the efficiency of biological treatment is improved, and the environmental conditions of the culture flora are relaxed.
The process method for treating wastewater provided by the embodiment of the invention combines a large number of experiments to screen out an optimal combined process method, orderly and organically combines pre-ammoniation/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment, and each section supports each other on the regulation and control function, thereby providing a new concept scheme for the denitrification and dephosphorization treatment of wastewater.
Preammonification/nitrosation to anammox (short-range CANON) service to oxidize NO in the influent2 -/NH4 +The concentration ratio is in the range of 1.20-1.35. The anaerobic ammoxidation process to form short-range CANON mainly adopts a biological rotating disc process, further processes preposed ammoniation/nitrosation, and is also a main denitrification working section. In the aerobic section, organic substances in water are mainly removed, and meanwhile, the phosphorus accumulating bacteria excessively absorb inorganic phosphorus in the water under the aerobic condition. The dephosphorization efficiency of the whole process is improved, the COD treatment is ensured to reach the standard, and NH in water can be ensured4 +The removal rate is more than 95 percent.
The integrated process method after combination is more efficient and more convenientIt is more stable. The process is stable and reliable in operation and resistant to impact load. The method has the advantages of low sludge yield, low sludge treatment cost and good sewage treatment effect, and has important significance for environmental protection. The matrix concentration impact resistance of the rotating biological disk combined with the moving bed is better than that of a common biological membrane reactor and is better than that of other types of reactors. And for NO2 -/NH4 +The wastewater with the concentration ratio exceeding the range and the short-range CANON process also have certain buffering capacity. The biological rotating disc has the characteristics of low sludge yield, low sludge treatment cost and low energy consumption. Has the strengthening function of the suspended filler moving bed, and has higher biological treatment efficiency. The fan-shaped arrangement and the mixed flow improve the volume utilization rate of the anaerobic ammonia oxidation section. When the anaerobic ammonia oxidation denitrification is carried out, a short-range CANON process is formed, compared with denitrification, the oxygen demand is reduced by 50-60%, and an external carbon source is not required. The whole combined process improves the biological treatment efficiency and treatment load.
In summary, the wastewater treatment reactor and the wastewater treatment process provided by the invention have the following technical effects:
1. the reactor provided by the invention is unique in arrangement and optimized in structure, and can be used for treating NO in the anaerobic ammonia oxidation section of the main body2 -/NH4 +The concentration ratio is easy to control, and the efficiency of biological denitrification treatment is improved.
2. The biological rotating disc is arranged in a fan-shaped arrangement mode, fan-shaped water inlet is realized, and the problem that the starting rotating disc of the biological rotating disc in the prior art is overloaded is greatly solved. The guide action of the fan-shaped inlet water and the rotation of the rotating disc forms mixed flow superior to common plug flow in the reactor, the hydraulic condition is good, the volume utilization rate of the biological rotating disc is high, and the biological treatment efficiency of the wastewater treatment reactor is improved.
In the anaerobic ammonia oxidation section, the biological rotating disc is combined with the process characteristics of moving bed biological membranes, the biological rotating disc is combined with the suspended filler treatment, the number of the biological membranes in unit volume is increased, the biodegradation capacity is enhanced, the biological treatment efficiency is improved, and the overall pollutant removal efficiency of the reactor is improved.
The wide-mouth water inlet and the narrow-mouth water outlet enable the biological rotating disc to accelerate the falling and metabolism of the biological membrane. The anaerobic ammonia oxidation section adopts a biological rotating disc process, so that the sludge age is long, the energy consumption is low, and the oxygen demand is reduced by 50-60% during anaerobic ammonia oxidation denitrification.
4. The process method for treating the wastewater provided by the invention has the advantages of reasonable process route, clear and ordered treatment mechanism and high nitrogen and phosphorus removal efficiency. NO for anaerobic ammonia oxidation section of main body2 -/NH4 +The concentration ratio is easy to control, and the efficiency of biological denitrification treatment is improved.
5. The process method for treating wastewater provided by the invention combines a large number of experiments to screen an optimal combined process method, orderly and organically combines pre-ammoniation/nitrosation-anaerobic ammonia oxidation (short-range CANON) -aerobic treatment, and each section supports each other on the regulation and control function, thereby providing a new concept scheme for wastewater denitrification and dephosphorization treatment. The combined overall process method is more efficient, more economical and more stable. The process is stable and reliable in operation and resistant to impact load. The method has the advantages of low sludge yield, low sludge treatment cost and good sewage treatment effect, and has important significance for environmental protection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A wastewater treatment reactor is characterized in that the wastewater treatment reactor is a circular tank body, the tank body comprises an inner ring tank and an outer ring tank, and an annular confluence groove and an annular water collection groove are arranged between the inner ring tank and the outer ring tank; the outer ring tank is sequentially divided into an anaerobic tank, an anoxic tank and an anaerobic ammonia oxidation tank according to the flow direction of water flow; the anaerobic tank and the anoxic tank are in an annular gallery type as a whole, and the anaerobic ammonia oxidation tank is in a fan-shaped type;
the main water inlet pipe is positioned at the starting end of the anaerobic tank, an underwater propeller is arranged on the wall of the anaerobic tank to strengthen the flow of water flow, fixed fillers for culturing anaerobic sludge are arranged in the anaerobic tank, the anaerobic tank is communicated with the annular confluence groove, and part of effluent flows into the annular confluence groove;
a rotatable shunt door is arranged between the anaerobic tank and the anoxic tank, an included angle between the shunt door and the retaining wall forms a rotation angle, the rotation angle ranges from 30 degrees to 150 degrees, the shunt door is rotated through a transmission mechanism, the shunt door is rotated to a required position and fixed, the shunt door cuts the effluent flow of the anaerobic tank, the shunt door has a function of shunting the effluent of the anaerobic tank, wastewater on one side of the retaining wall of the shunt door enters the annular confluence groove, and wastewater on the other side of the shunt door enters the anoxic tank;
part of effluent of the anaerobic tank flows into the anoxic tank; the interior of the anoxic pond is divided into 3 galleries, the bottom of the anoxic pond is provided with a first aeration system, and the effluent of the anoxic pond flows into the annular confluence groove;
the annular confluence groove collects the effluent of the anaerobic tank and the anoxic tank, and the tank body further comprises a water conveying pipe and a transfer pump, so that the wastewater collected in the annular confluence groove can be transferred to the anaerobic ammonia oxidation tank;
a plurality of groups of biological rotating discs for treating wastewater are arranged in the anaerobic ammonia oxidation tank, an annular water inlet channel is arranged on the periphery of the anaerobic ammonia oxidation tank, and a plurality of water inlet branch pipes are arranged on the annular water inlet channel; the water outlets of the water inlet branch pipes are communicated with the annular water channel; the water inlets of the water inlet branch pipes are communicated with the water conveying pipe;
the annular water collecting tank collects the wastewater treated by the anaerobic ammonia oxidation tank through the outflow of the orifice; the water storage level of the anaerobic ammonia oxidation tank is two thirds to three quarters of the height of the disc of the installed biological rotating disc;
the inner annular tank is an aerobic tank, the inlet water of the aerobic tank comes from the annular water collecting tank, the bottom of the annular water collecting tank is communicated with the aerobic tank, the bottom of the aerobic tank is provided with a second aeration device, and the aerobic tank is communicated with the total water outlet tank.
2. The wastewater treatment reactor according to claim 1, wherein a suspension packing for providing a carrier for the growth of biofilm is disposed between each two groups of the biological rotating disks, and each group of the biological rotating disks is disposed to rotate counterclockwise as viewed from the outside of the wastewater treatment reactor.
3. The wastewater treatment reactor according to claim 2, wherein the suspended filler comprises a spherical shell and a carrier arranged in the shell and used for fixing a biological membrane, the diameter of the shell is 10-30 mm, the diameter is larger than the distance between every two disks of each group of the biological rotating disks, the shell is formed by injection molding of a high molecular polymer, and the high molecular polymer is polypropylene or polyethylene; the material of the built-in carrier is a porous material with the specific gravity less than 1, and the density of the porous material is 0.90-0.96 g/cm3。
4. The wastewater treatment reactor according to claim 3, wherein the anaerobic ammonia oxidation tank is provided with a third aeration device at the bottom, and the third aeration device adopts an intermittent aeration mode.
5. A process for treating wastewater, characterized in that the wastewater treatment is carried out by using the wastewater treatment reactor as defined in any one of claims 1 to 4, thereby forming a combined process of "pre-ammonification/nitrosation-anammox-aerobic treatment":
the anaerobic tank forms an anaerobic section, mainly cultures anaerobic ammoniated flora, converts organic nitrogen into ammonia nitrogen, and controls the dissolved oxygen of the wastewater in the anaerobic section at 0-0.2 mg/L;
the anoxic tank forms an anoxic section, mainly cultures facultative nitrosation flora, the dissolved oxygen of the wastewater in the anoxic section is controlled at 0.2-2.0mg/L, so that the biological reaction of nitrosation is carried out in the anoxic section, and NH is carried out4 +Conversion to NO2 -；
The anaerobic ammonia oxidation tank forms an anaerobic ammonia oxidation section and mainly cultures anaerobic ammonia oxidation flora, and the dissolved oxygen of the wastewater in the anaerobic ammonia oxidation section is controlled to be 0.3-1.0mg/L so as to carry out biological reaction of anaerobic ammonia oxidation;
and (3) culturing the activated sludge in an aerobic section to mainly remove organic substances in water, and excessively absorbing inorganic phosphorus in the water by phosphorus accumulating bacteria under an aerobic condition, wherein the dissolved oxygen of the wastewater in the aerobic section is controlled to be more than 2.0 mg/L.
6. A process for treating waste water according to claim 5, wherein the flow ratio of said anaerobic tank to said anoxic tank and to said annular collecting groove is adjusted by controlling a rotation angle, wherein said rotation angle is an included angle between a splitter gate and a retaining wall, thereby controlling NO in waste water after confluence of said annular collecting groove2 -／NH4 +Concentration ratio of NO in the wastewater entering the anammox section of the main body2 -／NH4 +The concentration ratio is in the range of 1.20-1.35.
7. A process for treating wastewater according to claim 5, wherein said process for treating wastewater has an overall nitrogen removal duty of 3.0 to 5.0 kgN/(m)3.d)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454534.5A CN107089726B (en) | 2017-06-15 | 2017-06-15 | Wastewater treatment reactor and wastewater treatment process method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454534.5A CN107089726B (en) | 2017-06-15 | 2017-06-15 | Wastewater treatment reactor and wastewater treatment process method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107089726A CN107089726A (en) | 2017-08-25 |
| CN107089726B true CN107089726B (en) | 2020-02-21 |
Family
ID=59640135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710454534.5A Active CN107089726B (en) | 2017-06-15 | 2017-06-15 | Wastewater treatment reactor and wastewater treatment process method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107089726B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110950435A (en) * | 2019-12-12 | 2020-04-03 | 海湾环境科技（北京）股份有限公司 | Wastewater treatment system and method |
| CN114105300A (en) * | 2021-12-09 | 2022-03-01 | 中山市环保产业有限公司 | Integrated efficient denitrification sewage reactor and denitrification method thereof |
| CN116768425B (en) * | 2023-08-15 | 2023-11-03 | 江苏龙腾工程设计股份有限公司 | Ecological wetland system for rural environment lifting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204198490U (en) * | 2014-09-03 | 2015-03-11 | 重庆淏园环保科技有限公司 | A kind of assembly type membrane bioreactor |
| CN104556376A (en) * | 2014-11-29 | 2015-04-29 | 北京工业大学 | Autotrophic nitrogen removal method for biological phosphorus removal of urban sewage based on short-cut denitrification for providing nitrite |
| CN105236687A (en) * | 2015-11-02 | 2016-01-13 | 重庆大学 | Sewage treatment device and method for self-cleaning type micro-aeration vertical baffled wetland |
| CN106348446A (en) * | 2016-11-10 | 2017-01-25 | 盐城工学院 | Corner adjustable type wastewater treatment biochemical reactor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7927484B2 (en) * | 2008-09-11 | 2011-04-19 | University Of Central Florida Research Foundation, Inc. | Passive underground drainfield for septic tank nutrient removal using functionalized green filtration media |
-
2017
- 2017-06-15 CN CN201710454534.5A patent/CN107089726B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204198490U (en) * | 2014-09-03 | 2015-03-11 | 重庆淏园环保科技有限公司 | A kind of assembly type membrane bioreactor |
| CN104556376A (en) * | 2014-11-29 | 2015-04-29 | 北京工业大学 | Autotrophic nitrogen removal method for biological phosphorus removal of urban sewage based on short-cut denitrification for providing nitrite |
| CN105236687A (en) * | 2015-11-02 | 2016-01-13 | 重庆大学 | Sewage treatment device and method for self-cleaning type micro-aeration vertical baffled wetland |
| CN106348446A (en) * | 2016-11-10 | 2017-01-25 | 盐城工学院 | Corner adjustable type wastewater treatment biochemical reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107089726A (en) | 2017-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101514064B (en) | Biological denitrification device of sequencing batch internal circulation biological denitrification process | |
| CN103693738A (en) | Composite semi-nitration-anaerobic ammonia oxidation autotrophic denitrification device and operating method thereof | |
| CN101767876B (en) | Anaerobic-anoxic-hypoxic integrated reactor and application thereof | |
| CN110255714A (en) | A kind of low carbon source urban sewage processing system and method | |
| CN101973678A (en) | Bioaugmentation treatment technology of high ammonia nitrogen wastewater | |
| CN205258127U (en) | Circulatory flow loop type multistage sludge -biofilm intergrowth combined type bioreactor | |
| CN201990538U (en) | Saprobia treatment pond | |
| CN214528587U (en) | Rural domestic sewage treatment system of nitrogen and phosphorus removal integration | |
| CN100410189C (en) | Nitration denitrification integral type sewage denitrification biomembrane reactor | |
| CN101774729B (en) | Integral biological reactor based on short-range simultaneous denitrification and application thereof | |
| CN107089726B (en) | Wastewater treatment reactor and wastewater treatment process method | |
| CN110386731B (en) | Main stream autotrophic nitrogen removal system and method based on MBBR | |
| CN201857327U (en) | Composite integral biological membrane reactor for domestic sewage treatment | |
| CN114634276A (en) | Nitrogen and phosphorus removal integrated rural domestic sewage treatment system and treatment method thereof | |
| CN102557258A (en) | Improved integrated sewage treatment device | |
| CN209226777U (en) | A kind of reinforcing advanced nitrogen dephosphorization process sewage-treatment plant | |
| CN109970196A (en) | A kind of integrated form integrated waste water treating tank of application biology multiplication and fluidized-bed process | |
| CN201325907Y (en) | Sewage treatment system for oxidation ditch | |
| CN201424420Y (en) | Composite biologic treating pond with multiple concentric annular galleries | |
| CN112125401B (en) | Mud-water split-flow double-sludge reaction device and reaction method | |
| CN100534933C (en) | Technique for treating fertilizer waste water | |
| CN105540843A (en) | Integrated autotrophic denitrification reactor | |
| CN110386732B (en) | Mainstream autotrophic nitrogen removal transformation system and transformation method based on MBBR | |
| CN209835753U (en) | Biomembrane reactor of high-efficient denitrogenation of sewage | |
| CN217535571U (en) | UAD biological fluidized bed denitrification device based on sulfur autotrophy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20170825 Assignee: DONGTAI GAOKE TECHNOLOGY INNOVATION PARK Co.,Ltd. Assignor: YANCHENG INSTITUTE OF TECHNOLOGY Contract record no.: X2024980001259 Denomination of invention: A wastewater treatment reactor and a process method for treating wastewater Granted publication date: 20200221 License type: Common License Record date: 20240123 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240507 Address after: Building 2-B-2, Small and Medium Enterprises Park, Yanlong Subdistricts of China, Yandu District, Yancheng, Jiangsu Province, 224000 Patentee after: Jiangsu Hengyu Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: 224000 research and development building, 1166 Century Avenue, Yancheng City, Jiangsu Patentee before: YANCHENG INSTITUTE OF TECHNOLOGY Country or region before: China |