CN114772870B - Sewage treatment device and method for continuous flow particle size controllable sludge particles - Google Patents
Sewage treatment device and method for continuous flow particle size controllable sludge particles Download PDFInfo
- Publication number
- CN114772870B CN114772870B CN202210575129.XA CN202210575129A CN114772870B CN 114772870 B CN114772870 B CN 114772870B CN 202210575129 A CN202210575129 A CN 202210575129A CN 114772870 B CN114772870 B CN 114772870B
- Authority
- CN
- China
- Prior art keywords
- tank
- sedimentation
- carrier
- particles
- sludge
- 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
- 239000002245 particle Substances 0.000 title claims abstract description 123
- 239000010802 sludge Substances 0.000 title claims abstract description 116
- 239000010865 sewage Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004062 sedimentation Methods 0.000 claims abstract description 62
- 238000000926 separation method Methods 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000010992 reflux Methods 0.000 claims abstract description 26
- 244000005700 microbiome Species 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 238000012258 culturing Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 235000019362 perlite Nutrition 0.000 claims description 4
- 239000010451 perlite Substances 0.000 claims description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052683 pyrite Inorganic materials 0.000 claims description 4
- 239000011028 pyrite Substances 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 claims description 3
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 3
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims description 3
- 239000004626 polylactic acid Substances 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 2
- 230000000813 microbial effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 239000002028 Biomass Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000004071 biological effect Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
A sewage treatment device and a sewage treatment method for continuous flow sludge particles with controllable particle size. The sewage treatment device comprises a raw water tank, a carrier feeding tank and a A which are connected in sequence 2 An O biochemical tank, a mechanical separation tank, a sedimentation separation tank and a water outlet tank; the sedimentation separation tank comprises a first sedimentation area and a second sedimentation area which are sequentially arranged in the water flow direction, sludge particles are collected in the first sedimentation area, return to the anoxic area of the biochemical tank in a mode of an internal reflux pump, active sludge is collected in the second sedimentation area, and return to the anaerobic area of the biochemical tank in a mode of an external reflux pump; the carrier adding box is used for adding composite carrier particles with the particle size range of 50um-500um, concentrated distribution interval of not more than 100um and biological affinity for microorganism growth. Culturing the structure under the condition of low-concentration town sewageCompact sludge particles form rich microbial communities, the size is uniform, and the sedimentation speed can reach 30-80m/h.
Description
Technical Field
The application relates to the technical field of environment, in particular to a sewage treatment device and method for sludge particles with controllable continuous flow particle size.
Background
With the increasing prominence of environmental capacity and water environment problems, the requirements for environmental protection are continuously increasing. The existing sewage treatment plants are all faced with the requirement of improving the effluent quality from the primary B standard to the primary A standard or even higher. The current common sewage biological treatment methods are divided into two categories:
(1) The method is an activated sludge method and is characterized in that microorganisms for treating sewage are in a suspension state in a bioreactor;
(2) The second type is a sewage treatment microorganism attaching growth method, wherein microorganisms attach to the surface of a carrier in a certain form to grow fixedly.
The two sewage biological treatment methods have been invented for over a hundred years, and a series of improvements and perfections bring great guarantee to the water consumption of human beings, but the two methods are limited by the technology and are developed into bottlenecks. The limiting factors of the activated sludge process mainly include:
(1) The method is limited by suspension growth characteristics, has imperfect microorganism diversity and affects the advanced treatment effect;
(2) The growth cycle of some key microorganisms is limited by the parameters of the sewage treatment process;
(3) Is limited by the water quality change of the inlet water, and the supply fluctuation of nutrient elements for microorganism growth affects the biological activity and the actual treatment effect. To further steadily improve the effluent emission standard of biological treatment, different biological treatment technology combinations are necessary to be carried out, so that the removal of nitrogen and phosphorus is enhanced.
The method is an effective means for improving the denitrification and dephosphorization efficiency in the sewage treatment process by increasing the number of functional microorganisms of the biological treatment unit, and comprises an MBBR technology, an aerobic granular sludge technology and the like. The MBBR technology enables biomass to grow on the inner surface of the filler in an attached mode through throwing suspended filler with the encryption degree close to that of water in an aerobic zone or an anoxic zone and the like, and has the advantages of being high in biomass concentration, strong in tolerance, long in sludge age, small in occupied area and the like. The filler medium can effectively separate the attached biomass from the sludge age of the suspended biomass, and establish different microorganism populations. Aerobic granular sludge is an aggregate particle derived from microorganisms under the action of a certain hydraulic shear force. The aerobic granular sludge has the advantages of regular compact biological structure, high specific gravity, excellent sedimentation rate and the like, and can keep higher sludge concentration and volume load in the reactor, so that the secondary sedimentation tank is greatly reduced or omitted. However, under the condition of low-concentration town sewage water inflow, the MBBR process has long film forming time and uncontrollable microbial biomass, and the MBBR filler cannot realize full-pool fluidization per se, so that dissolved oxygen needs to be controlled at a higher level, and the energy consumption is higher; the aerobic granular sludge technology has the advantages of long starting period, difficult granulation and easily unstable structure.
Disclosure of Invention
The application mainly aims to provide a sewage treatment device and method for continuous flow sludge particles with controllable particle sizes, and aims to solve the technical problems in the prior art.
In order to achieve the aim, the application provides a sewage treatment device with continuous flow particle diameter controllable sludge particles, which comprises a raw water tank, a carrier feeding tank and a device A which are connected in sequence 2 a/O biochemical tank, a sedimentation separation tank and a water outlet tank; wherein,,
the carrier adding box is used for adding composite carrier particles with the particle size range of 50um-500um, concentrated distribution interval of not more than 100um and biological affinity for microorganism growth;
A 2 the O biochemical tank comprises an anaerobic zone, an anoxic zone and an aerobic zone, microorganisms are enriched on the composite carrier particles, sludge particles with functional carriers as cores are formed by culture, and the aerobic zone is connected with the precipitation separation tank so as to pass through the A 2 The sewage treated by the O biochemical tank is transmitted to the sedimentation separation tank;
the sedimentation separation tank comprises a first sedimentation area and a second sedimentation area which are sequentially arranged in the water flow direction, the sewage sludge particles are collected in the first sedimentation area, the sewage sludge particles return to the anoxic area of the biochemical tank in a mode of an internal reflux pump, the activated sludge is collected in the second sedimentation area, the activated sludge returns to the anaerobic area of the biochemical tank in a mode of an external reflux pump, and the supernatant fluid in the sedimentation separation area enters the water tank through an outflow weir.
Preferably, the device further comprises a mechanical separation tank, wherein the aerobic zone is connected with the mechanical separation tank through a pipeline, and the mechanical separation tank is connected with the sedimentation separation tank through a diversion trench and an effluent weir.
Preferably, the raw water tank and the carrier feeding box are connected with the anaerobic zone through a water inlet pump and a metering pump, and a carrier feeding barrel stirrer is further arranged in the carrier feeding box.
Preferably, said A 2 the/O biochemical tank 3 also comprises a frame type stirring system, an aerator, a microporous aeration disc and a real-time online monitoring device for the pH value and DO of the biochemical tank.
Preferably, the mechanical separation tank further comprises a hyperboloid stirrer, and the sedimentation separation tank further comprises a sludge discharge pipe.
Preferably, the device further comprises a PLC controller, wherein the PLC controller is electrically connected with the carrier feeding barrel stirrer, the metering pump, the frame stirrer, the hyperboloid stirrer and the pH and DO online detection device.
Preferably, the water outlet weir is of a zigzag structure and is vertically 90 degrees.
The application also provides a sewage treatment method of the sludge particles with the controllable continuous flow particle size, which comprises the following steps:
providing a sewage treatment plant of continuous flow particle size controllable sludge particles according to any one of claims 1-6;
providing the composite carrier particles, wherein the composite carrier particles comprise a basic biological carrier and functional carrier powder, and the functional carrier powder is loaded on the basic biological carrier through a dry powder mixing process;
dispersing the composite carrier particles in a carrier feeding box, mixing the composite carrier particles with activated sludge in an anaerobic zone of a biochemical pond through a metering pump, wherein the input amount is 8-15g/L, providing a framework for the formation of the sludge particles, enriching microorganisms on a functional carrier, and culturing to form sludge particles with the composite carrier particles as cores;
after the reaction of the sludge particles in the biochemical tank is completed, the sludge particles enter the mechanical separation tank or the sedimentation separation tank, preferably, the composite carrier particles are dispersed in a carrier feeding box and are input into an anaerobic zone of the biochemical tank through a metering pump to be mixed with the activated sludge, so that a framework is provided for the formation of the sludge particles.
Preferably, the composite carrier particles comprise a basic biological carrier and functional carrier powder, wherein the functional carrier powder is loaded on the basic biological carrier through a dry powder mixing process; the basic biological carrier comprises expanded perlite, volcanic rock, biochar and biological ceramsite, the basic carrier has a three-dimensional porous structure, and the functional carrier powder comprises one or more of sulfur powder, pyrite powder, glucose, starch, cellulose, polylactic acid, polyvinyl alcohol and polyhydroxyalkanoate.
Preferably, the dissolved oxygen in the aerobic zone is controlled to be 2-3mg/L; the activated sludge entering the second sedimentation zone returns to the anaerobic zone of the biochemical tank by an external reflux pump, the reflux ratio is 50-100%, and the time is 10-20d; the sludge particles are collected in the first sedimentation zone and returned to the anoxic zone of the biochemical pool by an internal reflux pump, wherein the reflux ratio is 100-200%.
Preferably, the frame stirrer and A in the carrier feeding box 2 The speed gradient of the frame stirrer in the O biochemical tank is controlled to be 10-60s -1 The speed gradient of hyperboloid stirring in the mechanical separation tank is controlled between 300 and 600 seconds -1 。
The technical scheme of the application has at least the following advantages:
(1) According to the application, through the particle carriers with concentrated particle size distribution, under the condition of low-concentration town sewage, sludge particles with compact structures are cultured, so that a rich microbial community is formed, a micro-aerobic environment can be created in an aerobic zone, synchronous nitrification and denitrification can be realized in the aerobic zone, and the effluent quality of town sewage treatment is improved.
(2) The particle size distribution of the cultured sludge particles is concentrated, the fluidization in the whole pool can be realized, and the structure can be kept to be completed under the action of hydraulic force. (3) The mechanical separation tank separates the sludge particles from the activated sludge, and can separate the aged microorganisms on the surface layer of the sludge particles, so that good biological activity in the system is maintained.
(4) The density and the particle size distribution of the sludge particles formed by culture are obviously different from those of the activated sludge, the sedimentation performance is excellent, the sedimentation speed can reach 30-80m/h, and the sedimentation separation tank realizes the separation of the sludge particles and the activated sludge through the difference of the sedimentation performance of the sludge particles and the activated sludge.
(5) After the sludge particles are formed, the activated sludge in the system can be phased out in a sludge discharge mode, so that the sludge settling performance of the system is improved, and the treatment capacity is improved.
(6) The three-dimensional porous structure and the functional carrier powder in the particle carrier are beneficial to enriching the obligate microorganism and quickening the culture of the sludge particles under the condition of low-concentration town sewage.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment plant with continuous flow particle size controllable sludge particles in an embodiment of the application;
FIG. 2 is a schematic diagram of a sewage treatment plant with continuous flow particle size controllable sludge particles in accordance with another embodiment of the present application;
FIG. 3 is a schematic view of an effluent weir according to an embodiment of the present application;
FIG. 4 is an enlarged view of sludge particles after microorganism attachment in example 1 of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the description of the present specification, the descriptions of the terms "one embodiment," "another embodiment," "other embodiments," or "first through X-th embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, method steps or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, the sewage treatment device with controllable continuous flow particle size sludge particles provided by the application comprises a raw water tank 1, a carrier feeding tank 2 and a, which are connected in sequence 2 a/O biochemical tank 3, a mechanical separation tank 4, a sedimentation separation tank 5 and a water outlet tank 6.
Wherein the A 2 The O biochemical tank 3 is divided into an anaerobic zone 3.1, an anoxic zone 3.2 and an aerobic zone 3.3, the raw water tank 1 and the carrier feeding box 2 are respectively connected with the anaerobic zone 3.1 through a water inlet pump 1.1 and a metering pump 2.1, through holes are arranged up and down in a staggered manner according to the water flow direction to connect each grid chamber, the aerobic zone 3.3 is connected with the mechanical separation tank 4 through a pipeline, and the mechanical separation tank is connected with the sedimentation separation tank 5 through a diversion trench 4.2 and a water outlet weir 4.3. Sludge particles are collected in a first sedimentation zone 5.1, returned to the anoxic zone 3.2 of the biochemical pool through an inner reflux pump 5.3, activated sludge is collected in a second sedimentation zone 5.2, returned to the anaerobic zone 3.1 of the biochemical pool through an outer reflux pump 5.4, and supernatant fluid of the sedimentation separation zone 5 enters a water outlet tank 6 through an outflow weir 5.5.
In addition, the A 2 the/O biochemical tank 3 also comprises a frame type stirring system 3.4, an aerator 3.6, a microporous aeration disc 3.7 and a real-time online monitoring device 3.5 for the pH value and DO of the biochemical tank; the mechanical separation tank 4 also comprises a hyperboloid stirrer 4.4 and stirring blades 4.1; the sedimentation separation tank 5 also comprises a mud pipe 5.6; the carrier feeding box 2 is also internally provided with a carrier feeding barrel stirrer.
The PLC controller 7 is electrically connected with and controls the carrier feeding barrel stirrer 2.1, the metering pump 2.2, the frame stirrer 3.4, the hyperboloid stirrer 4.4 and the pH and DO on-line detection device.
Preferably, the composite carrier particles comprise a basic biological carrier and functional carrier powder, wherein the functional carrier powder is loaded on the basic biological carrier through a dry powder mixing process; the basic biological carrier comprises expanded perlite, volcanic rock, biochar and biological ceramsite, the basic carrier has a three-dimensional porous structure, and the functional carrier powder comprises one or more of sulfur powder, pyrite powder, glucose, starch, cellulose, polylactic acid, polyvinyl alcohol and polyhydroxyalkanoate.
Preferably, the composite carrier particles are dispersed in a carrier feeding box, and are input into an anaerobic zone of a biochemical pond through a metering pump to be mixed with activated sludge, wherein the input amount is 8-15g/L, so that a framework is provided for the formation of sludge particles.
Preferably, the dissolved oxygen in the aerobic zone is controlled to be 2-3mg/L; the activated sludge entering the second sedimentation zone returns to the anaerobic zone of the biochemical tank by an external reflux pump, the reflux ratio is 50-100%, and the time is 10-20d; the sludge particles are collected in the first sedimentation zone and returned to the anoxic zone of the biochemical pool by an internal reflux pump, wherein the reflux ratio is 100-200%.
Preferably, the frame stirrer and A in the carrier feeding box 2 The speed gradient of the frame stirrer in the O biochemical tank is controlled to be 10-60s -1 The speed gradient of hyperboloid stirring in the mechanical separation tank is controlled between 300 and 600 seconds -1 。
Preferably, the water outlet weir is of a zigzag structure and is vertically 90 degrees.
Specifically, the composite carrier particles are dispersed in a carrier feeding box 2, and are input into an anaerobic zone 3.1 of a biochemical pond through a metering pump 2.2 to be mixed with activated sludge, wherein the input amount is 8-15g/L, so that a framework is provided for the formation of sludge particles.
Stage I: a is that 2 The inoculated sludge of the O biochemical tank 3 is taken from the tail end of an aerobic tank of a town sewage treatment plant, the concentration of the sludge is 3000-6000mg/L, the functional carrier and the inoculated sludge form mixed liquor, microorganisms are enriched on the functional carrier, sludge discharge is not carried out in the period, the activated sludge entering the second sedimentation area is returned to the anaerobic area 3.1 of the biochemical tank through an external reflux pump 5.4, the reflux ratio is 50-100%, the time is 10-20d, and sludge particles taking the functional carrier as a core are formed by culturing.
Stage II: after the sludge particles complete the reaction in the biochemical tank, the sludge particles are separated from the activated sludge by the mechanical separation tank, the mixed liquid enters the sedimentation separation tank 5 in the horizontal direction at a certain initial speed by the diversion trench 4.2 and the outflow weir 4.3, the sludge particles are firstly settled in the sedimentation first area 5.1 and collected, and the sludge particles are returned to the anoxic area 3.2 of the biochemical tank by the internal reflux pump 5.3, wherein the reflux ratio is 100-200%; and the activated sludge enters a second sedimentation zone and is discharged out of the system. Preferably, an inclined plate is arranged in the middle of the sedimentation separation tank 5, and the inclined plate is put down along the water flow and is inclined.
Referring to FIG. 2, the present application provides a sewage treatment apparatus with continuous flow of sludge particles of controllable particle size in another embodiment, which is similar to the embodiment in FIG. 1, and differs from the embodiment in that A 2 No mechanical separation tank is arranged between the O biochemical tank 3 and the sedimentation separation tank 5, A 2 And sewage treated by the O biochemical tank 3 directly enters the sedimentation separation tank 5 for horizontal flow sedimentation. Other structures are the same and are not described in detail herein.
Through the technical scheme, the application has at least the following advantages:
(1) According to the application, through the particle carriers with concentrated particle size distribution, under the condition of low-concentration town sewage, sludge particles with compact structures are cultured, so that a rich microbial community is formed, a micro-aerobic environment can be created in an aerobic zone, synchronous nitrification and denitrification can be realized in the aerobic zone, and the effluent quality of town sewage treatment is improved.
(2) The particle size distribution of the cultured sludge particles is concentrated, the fluidization in the whole pool can be realized, and the structure can be kept to be completed under the action of hydraulic force.
(3) The mechanical separation tank separates the sludge particles from the activated sludge, and can separate the aged microorganisms on the surface layer of the sludge particles, so that good biological activity in the system is maintained.
(4) The density and the particle size distribution of the sludge particles formed by culture are obviously different from those of the activated sludge, the sedimentation performance is excellent, the sedimentation speed can reach 30-80m/h, and the sedimentation separation tank realizes the separation of the sludge particles and the activated sludge through the difference of the sedimentation performance of the sludge particles and the activated sludge.
(5) After the sludge particles are formed, the activated sludge in the system can be phased out in a sludge discharge mode, so that the sludge settling performance of the system is improved, and the treatment capacity is improved.
(6) The three-dimensional porous structure and the functional carrier powder in the particle carrier are beneficial to enriching the obligate microorganism and quickening the culture of the sludge particles under the condition of low-concentration town sewage.
The following describes the technical scheme of the present application in specific examples.
Example 1: the inflow water is taken from fine grids of urban sewage treatment plants, and the water quality characteristics are as follows: COD is 200-466 mg/L; ammonia Nitrogen (NH) 4 + -N) a concentration of 25.3-43.5 mg/L; the concentration of Total Nitrogen (TN) is 30.3-52.7 mg/L; the concentration of Total Phosphorus (TP) is 3.39-6.43 mg/L; the pH is 6.8-7.7; the inoculated sludge is taken from activated sludge at the tail end of the aerobic tank, the concentration of the inoculated sludge is 5000mg/L, the functional carrier is formed by compounding expanded perlite and pyrite powder, the particle size distribution is 50-150 um, and the adding amount is 8g/L; inoculating sludge, functional carrier and sewage, fully mixing in a biochemical pond, controlling hydraulic retention time to be 5h, controlling dissolved oxygen in an aerobic zone to be 2mg/L, culturing and domesticating for 15d, and finishing film hanging of microorganisms on the functional carrier to form sludge particles with concentrated particle size distribution, wherein the particle size distribution is 60-300 um, and the density distribution is 1.09-1.16 g/cm 3 . The sedimentation speed can reach 30-60 m/h. The sludge particles after the biochemical reaction are put into a mechanical separation tank, and the speed gradient is controlled to 500S -1 The separation of the sludge particles and the activated sludge and the falling of the aged biological film are realized. Enters a sedimentation separation tank in a horizontal flow mode through a diversion trench 4.2, and the separation of sludge particles and activated sludge is realized under the action of gravity. Wherein, the internal reflux ratio is 100 percent, and the external reflux ratio is 50 percent. The functional carrier is supplemented into the system 1 time a week, and the supplement amount is 0.5mg/L. In the stable operation process, continuously tracking and detecting the water quality of the effluent of 45 days, wherein the COD is 9-21 mg/L; ammonia Nitrogen (NH) 4 + -N) an amount concentration of 0.15-0.45 mg/L; the mass concentration of Total Nitrogen (TN) is 6.5-9.1 mg/L; the mass concentration of the Total Phosphorus (TP) is 0.1-0.4 mg/L, and can meet the discharge requirement of the first-level A standard of pollutant discharge Standard of urban wastewater treatment plant (GB 18918-2002) or even stricter.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (6)
1. A sewage treatment device with controllable continuous flow particle size for sludge particles is characterized by comprising a raw water tank, a carrier feeding tank and a A which are connected in sequence 2 a/O biochemical tank, a sedimentation separation tank and a water outlet tank; wherein,,
the carrier adding box is used for adding composite carrier particles with the particle size range of 50um-500um, the concentrated distribution interval is not more than 100um and biological affinity for microorganism growth;
the A is 2 The O biochemical tank comprises an anaerobic zone, an anoxic zone and an aerobic zone, microorganisms are enriched on the composite carrier particles, sludge particles with the composite carrier particles as cores are formed by culture, and the aerobic zone is connected with the precipitation separation tank so as to pass through the A 2 The sewage treated by the O biochemical tank is transmitted to the sedimentation separation tank;
the sedimentation separation tank comprises a first sedimentation area and a second sedimentation area which are sequentially arranged in the water flow direction, sludge particles are collected in the first sedimentation area, return to the anoxic area of the biochemical tank in a mode of an internal reflux pump, active sludge is collected in the second sedimentation area, return to the anaerobic area of the biochemical tank in a mode of an external reflux pump, and supernatant fluid in the sedimentation separation area enters the water outlet tank through an outflow weir;
the sewage treatment device further comprises a mechanical separation tank, the aerobic zone is connected with the mechanical separation tank through a pipeline, and the mechanical separation tank is connected with the sedimentation separation tank through a diversion trench and a water outlet weir; the speed gradient of hyperboloid stirring in the mechanical separation tank is controlled between 300 and 600s -1 The method comprises the steps of carrying out a first treatment on the surface of the The A is 2 The O biochemical tank also comprises a frame type stirring system, an aerator, a microporous aeration disc and a real-time online monitoring device for the pH value and DO of the biochemical tank; the mechanical separation tank further comprises a hyperboloid stirrer, and the sedimentation separation tank further comprises a mud discharge pipe; frame stirrer and A in the carrier feeding box 2 Frame stirrer in O biochemical tankThe speed gradient is controlled between 10 and 60s -1 。
2. The apparatus according to claim 1, further comprising a PLC controller electrically connected to the carrier addition tank mixer, metering pump, frame mixer, hyperboloid mixer, and pH and DO on-line detection device.
3. The apparatus of claim 1, wherein the weir is of a saw-tooth configuration and is oriented at 90 ° vertically.
4. A sewage treatment method of sludge particles with controllable continuous flow particle size is characterized by comprising the following steps:
providing a sewage treatment plant of continuous flow particle size controllable sludge particles according to any one of claims 1-3;
providing the composite carrier particles, wherein the composite carrier particles comprise a basic biological carrier and functional carrier powder, and the functional carrier powder is loaded on the basic biological carrier through a dry powder mixing process;
dispersing the composite carrier particles in a carrier feeding box, mixing the composite carrier particles with activated sludge in an anaerobic zone of a biochemical pond through a metering pump, wherein the input amount is 8-15g/L, providing a framework for the formation of the sludge particles, enriching microorganisms on a functional carrier, and culturing to form sludge particles taking the composite carrier particles as cores; the functional carrier powder comprises one or more of sulfur powder, pyrite powder, glucose, starch, cellulose, polylactic acid, polyvinyl alcohol and polyhydroxyalkanoate;
after the reaction of the sludge particles in the biochemical tank is completed, the sludge particles enter the mechanical separation tank and the sedimentation separation tank.
5. The method for sewage treatment with continuous flow particle size controllable sludge particles according to claim 4, wherein the basic biological carrier comprises expanded perlite, volcanic rock, biochar and biological ceramsite, and the basic biological carrier has a three-dimensional porous structure.
6. The method for sewage treatment with continuous flow particle size controllable sludge particles according to claim 5, wherein dissolved oxygen in the aerobic zone is controlled to be 2-3mg/L and dissolved oxygen in the sedimentation separation tank is controlled to be 1-2 mg/L before the sludge particles are stably formed in the biochemical tank; the activated sludge entering the second sedimentation zone returns to the anaerobic zone of the biochemical tank by an external reflux pump, the reflux ratio is 50-100%, and the time is 10-20d; the sludge particles are collected in the first sedimentation zone and returned to the anoxic zone of the biochemical pool by an internal reflux pump, wherein the reflux ratio is 100-200%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575129.XA CN114772870B (en) | 2022-05-24 | 2022-05-24 | Sewage treatment device and method for continuous flow particle size controllable sludge particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575129.XA CN114772870B (en) | 2022-05-24 | 2022-05-24 | Sewage treatment device and method for continuous flow particle size controllable sludge particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114772870A CN114772870A (en) | 2022-07-22 |
| CN114772870B true CN114772870B (en) | 2023-10-31 |
Family
ID=82408123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210575129.XA Active CN114772870B (en) | 2022-05-24 | 2022-05-24 | Sewage treatment device and method for continuous flow particle size controllable sludge particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114772870B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117486370B (en) * | 2023-12-19 | 2024-08-09 | 北京城市排水集团有限责任公司 | Accurate sewage treatment device and method |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408649A (en) * | 2002-04-24 | 2003-04-09 | 陈启松 | Integrated A2/O biochemical system |
| JP2007136360A (en) * | 2005-11-18 | 2007-06-07 | Sumitomo Heavy Ind Ltd | Granular microbial sludge generation method and apparatus |
| CN103663725A (en) * | 2013-12-05 | 2014-03-26 | 北京交通大学 | Continuous flow biological denitrification method based on granular sludge, and apparatus |
| CN105347515A (en) * | 2015-12-09 | 2016-02-24 | 安徽师范大学 | Packing medium for permeable reactive barrier and application of packing medium to aspect of in-situ treatment on underground water nitrate pollution and method thereof |
| CN106167340A (en) * | 2016-08-22 | 2016-11-30 | 浙江工业大学 | A kind of AAO continuous-flow aerobic granular sludge denitrification dephosphorization technique and system |
| CN107098467A (en) * | 2017-05-19 | 2017-08-29 | 北京建筑大学 | A kind of built-in anaerobic membrane bioreactor of integral type |
| CN107381813A (en) * | 2017-08-31 | 2017-11-24 | 北京城市排水集团有限责任公司 | The device and method of sludge segment reflux strengthened anaerobic ammoxidation denitrification process |
| CN108101191A (en) * | 2017-12-19 | 2018-06-01 | 山东鲁抗中和环保科技有限公司 | Floating stuffing built in a kind of biofilm reactor |
| CN109607778A (en) * | 2019-01-31 | 2019-04-12 | 北京潮白环保科技股份有限公司 | The processing method of the carrier of nitrate in a kind of removal water body |
| CN109867356A (en) * | 2019-02-20 | 2019-06-11 | 湖南三友环保科技股份有限公司 | A kind of high concentration powder carrier organism fluidized-bed process of novel process town sewage |
| CN109912029A (en) * | 2019-03-19 | 2019-06-21 | 北京工业大学 | A kind of gravity flow Internal-circulationaerobic aerobic granule sludge continuous flow reactor |
| CN209052450U (en) * | 2018-11-13 | 2019-07-02 | 北京城市排水集团有限责任公司 | A kind of flat flow multi-bucket sedimentation basin for aerobic particle mud |
| CN110627226A (en) * | 2019-10-31 | 2019-12-31 | 湖南三友环保科技有限公司 | Inorganic composite powder carrier and application thereof in enhanced biological denitrification of town sewage treatment |
| CN110776096A (en) * | 2019-11-18 | 2020-02-11 | 浙江卓锦环保科技股份有限公司 | Novel anaerobic biochemical circulation flow reactor |
| CN110981078A (en) * | 2019-11-20 | 2020-04-10 | 北京工业大学 | Continuous flow device and method for realizing urban sewage denitrification coupled with biological phosphorus removal by utilizing anaerobic ammonia oxidation |
| CN210528581U (en) * | 2019-02-01 | 2020-05-15 | 甘肃森续环保能源设备有限公司 | Integrated MBBR (moving bed biofilm reactor) microreactor |
| CN111439830A (en) * | 2020-05-20 | 2020-07-24 | 内蒙古圣清科技有限公司 | MBBR suspended biological filler and preparation method thereof |
| CN111470737A (en) * | 2020-05-22 | 2020-07-31 | 中冶京诚工程技术有限公司 | Sewage treatment equipment |
| CN213738791U (en) * | 2021-06-09 | 2021-07-20 | 中铁环境科技工程有限公司 | Biochemical system for treating domestic sewage |
| CN214528587U (en) * | 2020-12-16 | 2021-10-29 | 河北恒特环保工程有限公司 | Rural domestic sewage treatment system of nitrogen and phosphorus removal integration |
| CN215439835U (en) * | 2021-08-11 | 2022-01-07 | 沈阳建筑大学 | Anaerobic reactor capable of circularly treating |
-
2022
- 2022-05-24 CN CN202210575129.XA patent/CN114772870B/en active Active
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408649A (en) * | 2002-04-24 | 2003-04-09 | 陈启松 | Integrated A2/O biochemical system |
| JP2007136360A (en) * | 2005-11-18 | 2007-06-07 | Sumitomo Heavy Ind Ltd | Granular microbial sludge generation method and apparatus |
| CN103663725A (en) * | 2013-12-05 | 2014-03-26 | 北京交通大学 | Continuous flow biological denitrification method based on granular sludge, and apparatus |
| CN105347515A (en) * | 2015-12-09 | 2016-02-24 | 安徽师范大学 | Packing medium for permeable reactive barrier and application of packing medium to aspect of in-situ treatment on underground water nitrate pollution and method thereof |
| CN106167340A (en) * | 2016-08-22 | 2016-11-30 | 浙江工业大学 | A kind of AAO continuous-flow aerobic granular sludge denitrification dephosphorization technique and system |
| CN107098467A (en) * | 2017-05-19 | 2017-08-29 | 北京建筑大学 | A kind of built-in anaerobic membrane bioreactor of integral type |
| CN107381813A (en) * | 2017-08-31 | 2017-11-24 | 北京城市排水集团有限责任公司 | The device and method of sludge segment reflux strengthened anaerobic ammoxidation denitrification process |
| CN108101191A (en) * | 2017-12-19 | 2018-06-01 | 山东鲁抗中和环保科技有限公司 | Floating stuffing built in a kind of biofilm reactor |
| CN209052450U (en) * | 2018-11-13 | 2019-07-02 | 北京城市排水集团有限责任公司 | A kind of flat flow multi-bucket sedimentation basin for aerobic particle mud |
| CN109607778A (en) * | 2019-01-31 | 2019-04-12 | 北京潮白环保科技股份有限公司 | The processing method of the carrier of nitrate in a kind of removal water body |
| CN210528581U (en) * | 2019-02-01 | 2020-05-15 | 甘肃森续环保能源设备有限公司 | Integrated MBBR (moving bed biofilm reactor) microreactor |
| CN109867356A (en) * | 2019-02-20 | 2019-06-11 | 湖南三友环保科技股份有限公司 | A kind of high concentration powder carrier organism fluidized-bed process of novel process town sewage |
| CN109912029A (en) * | 2019-03-19 | 2019-06-21 | 北京工业大学 | A kind of gravity flow Internal-circulationaerobic aerobic granule sludge continuous flow reactor |
| CN110627226A (en) * | 2019-10-31 | 2019-12-31 | 湖南三友环保科技有限公司 | Inorganic composite powder carrier and application thereof in enhanced biological denitrification of town sewage treatment |
| CN110776096A (en) * | 2019-11-18 | 2020-02-11 | 浙江卓锦环保科技股份有限公司 | Novel anaerobic biochemical circulation flow reactor |
| CN110981078A (en) * | 2019-11-20 | 2020-04-10 | 北京工业大学 | Continuous flow device and method for realizing urban sewage denitrification coupled with biological phosphorus removal by utilizing anaerobic ammonia oxidation |
| CN111439830A (en) * | 2020-05-20 | 2020-07-24 | 内蒙古圣清科技有限公司 | MBBR suspended biological filler and preparation method thereof |
| CN111470737A (en) * | 2020-05-22 | 2020-07-31 | 中冶京诚工程技术有限公司 | Sewage treatment equipment |
| CN214528587U (en) * | 2020-12-16 | 2021-10-29 | 河北恒特环保工程有限公司 | Rural domestic sewage treatment system of nitrogen and phosphorus removal integration |
| CN213738791U (en) * | 2021-06-09 | 2021-07-20 | 中铁环境科技工程有限公司 | Biochemical system for treating domestic sewage |
| CN215439835U (en) * | 2021-08-11 | 2022-01-07 | 沈阳建筑大学 | Anaerobic reactor capable of circularly treating |
Non-Patent Citations (7)
| Title |
|---|
| Production of hydrogen in a granular sludge-based anaerobic continuous stirred tank reactor;Show, KY 等;INTERNATIONAL JOURNAL OF HYDROGEN ENERGY;第32卷(第18期);第4744-4753页 * |
| SMBR系统活性污泥性质对膜污染特征的影响;高彦昌;杨永哲;应京强;;环境科学学报(01);第115-120页 * |
| 两区沉淀池连续流好氧颗粒污泥的培养及特性;陶亚强;中国优秀硕士学位论文全文数据库工程科技Ⅰ辑(第4期);第B027-883页 * |
| 刘建伟等.《恶臭气体生物处理新技术与应用实例》.中国环境出版社,2020,第101页. * |
| 好氧污泥絮体与厌氧颗粒污泥的剪切稳定性分析;王毅力等;中国环境科学;第29卷(第4期);第380-385页 * |
| 沈耀良等.废水生物处理新技术-理论与应用（第二版）.中国环境科学出版社,2006,第573-577页. * |
| 环境统计教材编写委员会.《环境统计实务》.中国环境出版社,2016,第235页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114772870A (en) | 2022-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Schwarzenbeck et al. | Aerobic granular sludge in an SBR-system treating wastewater rich in particulate matter | |
| Burghate et al. | Fluidized bed biofilm reactor–a novel wastewater treatment reactor | |
| CN101913706B (en) | Method for treating monosodium glutamate wastewater by using three-phase biological fluidized bed reactor | |
| CN111470627A (en) | Denitrification treatment process for livestock breeding wastewater with high ammonia nitrogen and low carbon nitrogen ratio | |
| CN101973674B (en) | Hydrocyclone solid-liquid separation type SBR-technique domestic sewage treatment device and application method thereof | |
| CN114988565B (en) | Gravity-driven rotational flow reinforced continuous flow aerobic activated sludge granulation device and method | |
| CN102583900A (en) | Method for removing nitrogen and phosphorus by MBBRs (Moving Bed Biofilm Reactors) with sectionalized water inflow | |
| CN109292967B (en) | SBBR (sequencing batch reactor) process-based high-ammonia nitrogen rural biochemical sewage treatment device and method | |
| Yan et al. | Continuous flow reactors for cultivating aerobic granular sludge: configuration innovation, principle and research prospect | |
| CN101781056B (en) | Treatment method of waste papermaking water | |
| CN113149213A (en) | Device and method for rapidly culturing aerobic granular sludge and treating low-carbon-ratio municipal sewage | |
| CN114772870B (en) | Sewage treatment device and method for continuous flow particle size controllable sludge particles | |
| CN101781055B (en) | Treatment method of waste papermaking water | |
| CN114835255B (en) | Composite bioreactor based on iron-carbon carrier and preparation and sewage treatment method thereof | |
| CN214880538U (en) | Device for rapidly culturing aerobic granular sludge and treating low-carbon-ratio urban sewage | |
| Elmitwalli et al. | Treatment of domestic sewage at low temperature in a two-anaerobic step system followed by a trickling filter | |
| CN211896257U (en) | One-stage partial nitrosation-anaerobic ammonia oxidation microparticle sludge culture device | |
| CN114988564B (en) | Pressure-driven cyclone reinforced continuous flow aerobic activated sludge granulation device and method | |
| CN201857326U (en) | Rotary-liquid solid-liquid separation type SBR (Sequencing Batch Reactor Activated Sludge Process) domestic sewage treatment device | |
| Karapinar et al. | Effect of particle number density on wastewater treatment performance of a fluidized-bed bioreactor | |
| CN205710343U (en) | A kind of integral anaerobic height NH_3-N treating reactor | |
| CN207451733U (en) | A kind of sewage disposal device of light particle system | |
| CN117486369B (en) | Rapid culture device and method for granular sludge in continuous flow anaerobic ammonia oxidation denitrification process | |
| CN116730498B (en) | Coupling enhanced composite flow sewage treatment system and treatment method | |
| CN220845752U (en) | Vertical flow type AO sewage treatment device |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231103 Address after: 22 / F and 23 / F, building F1, luguyuyuan, No.27, Wenxuan Road, high tech Development Zone, Changsha, Hunan 410000 Patentee after: Hunan Sanyou Environmental Protection Technology Co.,Ltd. Address before: 410000 a025, No. 908, building BCD, Lugu business center, No. 199 Lulong Road, high tech Development Zone, Changsha, Hunan Province Patentee before: Hunan Wufang environmental science and Technology Research Institute Co.,Ltd. |