CN117819721A - Sewage treatment process combining compound diatomite and ICEAS process - Google Patents
Sewage treatment process combining compound diatomite and ICEAS process Download PDFInfo
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- CN117819721A CN117819721A CN202410069452.9A CN202410069452A CN117819721A CN 117819721 A CN117819721 A CN 117819721A CN 202410069452 A CN202410069452 A CN 202410069452A CN 117819721 A CN117819721 A CN 117819721A
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- iceas
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000010865 sewage Substances 0.000 title claims abstract description 81
- 150000001875 compounds Chemical class 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000008569 process Effects 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005273 aeration Methods 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 239000010802 sludge Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 241000894006 Bacteria Species 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- 244000005700 microbiome Species 0.000 claims description 11
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000000813 microbial effect Effects 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 4
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- 230000000243 photosynthetic effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims 9
- 230000000694 effects Effects 0.000 abstract description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 15
- 229910052698 phosphorus Inorganic materials 0.000 description 15
- 239000011574 phosphorus Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000004062 sedimentation Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 150000007524 organic acids Chemical class 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- 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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
-
- 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
-
- 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
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a sewage treatment process combining a compound diatomite and an ICEAS process, and belongs to the technical field of sewage treatment. The method comprises the following steps: s1, sewage in a pretreatment chamber flows into an anaerobic treatment chamber through a communication port, and is subjected to anaerobic treatment in the anaerobic treatment chamber; s2, sewage in the anaerobic treatment chamber flows into the aerobic treatment chamber through the communication port, compound diatomite is added into the aerobic treatment chamber, and continuous aeration is carried out through the aeration pipe I; s3, sewage in the aerobic treatment chamber flows into the solid-liquid separation chamber through a third communication port, the compound diatomite is enriched on the filter screen, and clear water penetrates through the filter screen and is discharged from the water outlet; s4, the compound diatomite sewage enriched on the filter screen flows into the pretreatment chamber through the water return port and the water return pipe under the action of the water pump; s5, discharging the sludge precipitated in the pretreatment chamber through a sludge pump. The sewage treatment process combining the compound diatomite and the ICEAS process can solve the problems of low sewage treatment efficiency and poor effect.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment process combining a compound diatomite and an ICEAS process.
Background
ICEAS is intermittent type circulation time delay aeration activated sludge process, increases the pre-reaction zone at the inlet end of reactor, and the rivers can be adjusted to the pre-reaction zone, make rivers get into main reaction zone with very low velocity of flow, can not produce obvious influence to the mud-water separation of main reaction zone, can realize continuous water inlet, intermittent type play water, make the water distribution simplify greatly, and the operation is more nimble. The ICEAS technology needs intermittent aeration in a main reaction zone, and the aeration stage is a denitrification process; when aeration is stopped, the activated sludge is precipitated in the main reaction zone, a sludge zone is formed at the bottom of the main reaction zone, and the sludge is discharged periodically. This intermittent aeration method results in a relatively low efficiency of sewage treatment. And the sludge is precipitated at the bottom of the tank to influence the aeration effect, thereby influencing the sewage treatment effect.
The diatomite has the characteristics of light weight, soft texture, multiple holes, large specific surface area, stable chemical property, strong adsorption capacity and the like, and can filter and adsorb soluble organic matters in water; therefore, it is widely used in water treatment processes. Diatomite is also commonly selected as a carrier of microorganisms in the ICEAS process, but the removal rate of organic matters in sewage by single diatomite is low; and the concentration of the microorganism group is low, which affects the sewage treatment effect.
Disclosure of Invention
The invention aims to provide a sewage treatment process combining a compound diatomite and an ICEAS process, which solves the problems of low sewage treatment efficiency and poor effect.
In order to achieve the above purpose, the invention provides a sewage treatment process combining a compound diatomite and an ICEAS process, which comprises the following steps:
s1, discharging sewage into a pretreatment chamber through a sewage pipe, wherein the sewage in the pretreatment chamber flows into an anaerobic treatment chamber through a communication port arranged on a first partition plate, and the sewage in the anaerobic treatment chamber is stirred by a stirrer to perform anaerobic treatment in the anaerobic treatment chamber;
s2, sewage treated by the anaerobic treatment chamber flows into the aerobic treatment chamber through a communication port on the second partition board, a feeder is opened, compound diatomite is added into the aerobic treatment chamber, a blower is opened, and continuous aeration is carried out to the aerobic treatment chamber through an aeration pipe; the sewage in the aerobic treatment chamber is accelerated and stirred under the action of an accelerator;
s3, sewage treated by the aerobic treatment chamber flows into the solid-liquid separation chamber through a communication port III arranged on a partition plate III, a valve on an aeration pipe II is opened, the sewage in the solid-liquid separation chamber is subjected to aeration treatment, the compound diatomite moves upwards and is enriched on a filter screen, clear water penetrates through the filter screen, and is discharged from a water outlet above the filter screen;
s4, the compound diatomite sewage enriched on the filter screen flows into a pretreatment chamber through a water return port and a water return pipe under the action of a water pump, and is recycled;
s5, discharging the sludge precipitated in the pretreatment chamber through a sludge pump.
Preferably, in the step S1, the first communication port is located at an upper portion of the first partition plate.
Preferably, in the step S2, the communication port is located at a lower portion of the second partition plate.
Preferably, in the step S2, the air outlet of the first aeration pipe is located directly below the accelerator.
Preferably, in the step S2, the accelerator includes an upper cone portion and a lower cone portion, and the upper cone portion and the lower cone portion are connected by a cylindrical connecting portion.
Preferably, in the step S2, the preparation method of the compound diatomite comprises the following steps,
s21, adding hydrochloric acid solution with the concentration of 3-4mol/L into diatomite with the granularity of 100-200 meshes, performing ultrasonic treatment for 1-2 hours, washing to be neutral, and calcining for 1-2 hours at the temperature of 500-600 ℃ to obtain activated diatomite;
s22, soaking the activated diatomite in a flocculant solution, and drying to obtain modified diatomite;
s23, mixing the modified diatomite with microorganism bacteria to obtain the compound diatomite.
Preferably, in the step S21, the volume ratio of the diatomite to the hydrochloric acid is 1:2-3.
Preferably, in S22, the flocculant is a microbial flocculant.
Preferably, in S23, the microbial bacteria include nitrifying bacteria, photosynthetic bacteria, bacillus, lactic acid bacteria and phosphorus accumulating bacteria.
Preferably, in the step S3, the third communication port is located at the lower part of the third partition board, and the second aeration pipe is inserted into the solid-liquid separation chamber through the third communication port.
The sewage treatment process combining the compound diatomite and the ICEAS process has the advantages and positive effects that:
1. the anaerobic treatment chamber and the aerobic treatment chamber are arranged, and the phosphorus removal effect in the sewage is improved under the action of anoxic phosphorus release and aerobic phosphorus absorption by the phosphorus accumulating bacteria.
2. An accelerator is arranged in the aerobic treatment chamber, so that the water flow speed is improved, sewage is stirred, and the treatment effect of the compound diatomite on the sewage is improved.
3. The arrangement of the first aeration pipe in the aerobic treatment chamber and the second aeration pipe in the solid-liquid separation chamber reduces the sedimentation of the compound diatomite, and improves the water treatment efficiency and effect of the compound diatomite.
4. The diatomite is subjected to hydrochloric acid and calcination treatment and is compounded with flocculant and microorganism bacteria to form compound diatomite, so that the diatomite integrates adsorption, coagulation, filtration and biochemistry, and the water treatment effect is improved.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment process embodiment utilizing a combination of a compound diatomite and an ICEAS process;
fig. 2 is a schematic diagram of an accelerator structure according to an embodiment of a sewage treatment process using a combination of diatomite and an ICEAS process.
Reference numerals
1. A pretreatment chamber; 2. an anaerobic treatment chamber; 3. an aerobic treatment chamber; 4. a solid-liquid separation chamber; 5. a first partition board; 6. a second partition board; 7. a third partition board; 8. a first communication port; 9. a second communication port; 10. a third communication port; 11. a feeder; 12. a blower; 13. an aeration pipe I; 14. an aeration pipe II; 15. an accelerator; 16. a water return port; 17. a water outlet; 18. a filter screen; 19. a sludge pump; 20. an upper cone portion; 21. a connection part; 22. a lower cone.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Examples
As shown in fig. 1-2, a sewage treatment process using a combination of a compound diatomite and an ICEAS process comprises the steps of:
s1, discharging sewage into a pretreatment chamber 1 through a sewage pipe, wherein the sewage in the pretreatment chamber 1 flows into an anaerobic treatment chamber 2 through a first communication port 8 arranged on a first partition plate 5, and the sewage in the anaerobic treatment chamber 2 is stirred by a stirrer to perform anaerobic treatment in the anaerobic treatment chamber 2.
The pretreatment chamber 1 has a pre-precipitation function, and firstly, sediment and other impurities contained in sewage are subjected to precipitation treatment. The first communication port 8 is positioned at the upper part of the first partition plate 5, so that the speed of water flow is controlled by the pretreatment chamber 1, and the water flow can flow into the anaerobic treatment chamber 2 more uniformly and stably.
The anaerobic treatment chamber 2 is used for completing the anaerobic phosphorus release process, and sewage in the anaerobic treatment chamber 2 is continuously stirred by a stirrer, so that phosphorus accumulating bacteria can fully release phosphorus. Under the anoxic condition, the phosphorus accumulating bacteria decompose organic matters in the sewage into substances such as organic acid and the like, meanwhile, phosphorus is released, and the organic acid can be further utilized by aerobic microorganisms in the subsequent aerobic treatment chamber 3 to convert the organic acid into carbon dioxide and water, and meanwhile, the phosphorus in the sewage is absorbed, so that the sewage treatment efficiency is improved.
S2, sewage treated by the anaerobic treatment chamber 2 flows into the aerobic treatment chamber 3 through a second communication port 9 on the second partition plate 6. The second communication port 9 is positioned at the lower part of the second partition board 6, which is favorable for the more complete phosphorus release reaction in the anaerobic treatment chamber 2.
COD and BOD biodegradation and ammonia nitrogen nitrification in sewage treatment are completed in the aerobic treatment chamber 3. Phosphorus accumulating bacteria absorb a large amount of phosphorus under aerobic conditions, so that the purpose of removing phosphorus in sewage is achieved.
And the feeder 11 is opened, the compound diatomite is added into the aerobic treatment chamber 3, and the compound diatomite is used as a carrier of microorganisms, so that the population concentration of the microorganisms is improved, multi-flora activated sludge is formed, and the treatment efficiency and effect of the sludge are improved.
The preparation method of the compound diatomite comprises the following steps,
s21, adding hydrochloric acid solution with the concentration of 3-4mol/L into diatomite with the granularity of 100-200 meshes, carrying out ultrasonic treatment for 1-2h, washing to be neutral, and calcining at the temperature of 500-600 ℃ for 1-2h to obtain the activated diatomite. The volume ratio of the diatomite to the hydrochloric acid is 1:2-3. Hydrochloric acid is adopted to treat the diatomite and high-temperature calcination is carried out, so that impurities on the surface and in micropores of the diatomite can be cleaned, and the specific surface area and adsorption point positions of the diatomite are increased. The specific surface area of the activated diatomite is 1000m 2 /L。
S22, soaking the activated diatomite in a flocculant solution, and drying to obtain the modified diatomite. Activated diatomite is modified by the flocculant, and the flocculant is adsorbed on the activated diatomite, so that the adsorption and coagulating sedimentation effects of the activated diatomite are improved. The flocculant is a microbial flocculant. The biological flocculant has the advantages of biodegradability and safety, and no secondary pollution to the water body.
S23, mixing the modified diatomite with microorganism bacteria to obtain the compound diatomite. Microbial bacteria include nitrifying bacteria, photosynthetic bacteria, bacillus, lactic acid bacteria, and polyphosphoric bacteria. The diatomite is subjected to activation and modification treatment, so that the concentration of microorganism groups is improved, the biological groups are diversified, microorganism bacteria are coagulated in the diatomite, and the decontamination effect of the compound diatomite is improved.
The blower 12 is turned on, and aeration is continuously performed into the aerobic treatment chamber 3 through the first aeration pipe 13. The aeration provides an aerobic environment on one hand, and continuous aeration enables the compound diatomite to be in a suspension state in the aerobic treatment chamber 3, so that sedimentation of the compound diatomite is reduced, the compound diatomite can continuously adsorb, coagulate and biochemically treat sewage, and the treatment efficiency and effect of the sewage are improved.
The sewage in the aerobic treatment chamber 3 is accelerated and stirred under the action of the accelerator 15. The accelerator 15 is fixedly arranged in the aerobic treatment chamber 3, the top of the accelerator 15 does not exceed the sewage level, and the bottom of the accelerator 15 does not contact the bottom surface of the aerobic treatment chamber 3. The accelerator 15 includes an upper cone portion 20 and a lower cone portion 22, and the upper cone portion 20 and the lower cone portion 22 are connected by a cylindrical connecting portion 21. The air outlet of the first aerator pipe 13 is positioned right below the accelerator 15. The sewage moves upwards under the action of the first aeration pipe 13, enters into the lower cone portion 22 of the accelerator 15, the cross-sectional area of the lower cone portion 22 gradually decreases from bottom to top, and as the flow velocity of liquid is inversely proportional to the cross-sectional area, the flow velocity of sewage gradually increases along with the decrease of the cross-sectional area of the lower cone portion 22, so that the sewage is accelerated. The accelerated sewage enters the upper cone portion 20 through the connecting portion 21, the pressure of the sewage is released, the upper cone portion 20 accelerates the sewage further, so that the sewage flows upwards in the aerobic treatment chamber 3 in an accelerating mode, the sewage flowing out of the accelerator 15 flows downwards from the edge of the accelerator 15 under the action of gravity, then flows from the accelerator 15 in an accelerating mode through the first aeration pipe 13, and an internal circulation is formed in the aerobic treatment chamber 3. Thus being beneficial to reducing the sedimentation of the compound diatomite and improving the treatment efficiency and effect of the compound diatomite on sewage.
Under the action of accelerator 15, aeration pipe 13 and compound diatomite, the suspended solid concentration in aerobic treatment chamber 3 is up to above 6000 mg/L.
S3, sewage treated by the aerobic treatment chamber 3 flows into the solid-liquid separation chamber 4 through a communication port III 10 arranged on a partition board III 7. The third communication port 10 is positioned at the lower part of the third partition plate 7, and the second aeration pipe 14 is inserted into the solid-liquid separation chamber 4 through the third communication port 10. In the process of accelerating the flow of sewage in the aerobic treatment chamber 3, part of the treated sewage flows into the solid-liquid separation chamber 4 through the communication port III 10 to carry out solid-liquid separation.
And opening a valve on the aeration pipe II 14 to perform aeration treatment on the sewage in the solid-liquid separation chamber 4. The second aerator pipe 14 blows the compound diatomite entering the solid-liquid separation chamber 4 upwards. The upper part of the solid-liquid separation chamber 4 is provided with a filter screen 18, and the mesh opening of the filter screen 18 is smaller than the particle size of the compound diatomite, so that the compound diatomite is enriched on the filter screen 18, and clear water penetrates the filter screen 18, thereby realizing the separation of the compound diatomite and clear water. The compound diatomite is intercepted on the filter screen 18, a compound diatomite enrichment zone is formed below the filter screen 18, the effect of further filtering and adsorbing sewage is achieved, and the sewage treatment effect is improved. Clear water is discharged from a water outlet 17 above the filter screen 18 and enters the next process for treatment.
S4, the compound diatomite sewage enriched on the filter screen 18 flows into the pretreatment chamber 1 through the water return port 16 and the water return pipe under the action of the water pump, and is recycled. The water return port 16 is arranged below the filter screen 18, the water return port 16 intermittently pumps the sewage enriched with the compound diatomite back into the pretreatment chamber 1 through the water return pipe and the water pump, and the compound diatomite pretreats the sewage in the pretreatment chamber 1 and precipitates in the pretreatment chamber 1.
S5, discharging the sludge deposited in the pretreatment chamber 1 through a sludge pump 19. The sludge pump 19 discharges the sludge precipitated in the pretreatment chamber 1 and the diatomaceous earth.
Therefore, the sewage treatment process combining the compound diatomite and the ICEAS process can solve the problems of low sewage treatment efficiency and poor effect.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (10)
1. The sewage treatment process combining the compound diatomite and the ICEAS process is characterized by comprising the following steps of:
s1, discharging sewage into a pretreatment chamber through a sewage pipe, wherein the sewage in the pretreatment chamber flows into an anaerobic treatment chamber through a communication port arranged on a first partition plate, and the sewage in the anaerobic treatment chamber is stirred by a stirrer to perform anaerobic treatment in the anaerobic treatment chamber;
s2, sewage treated by the anaerobic treatment chamber flows into the aerobic treatment chamber through a communication port on the second partition board, a feeder is opened, compound diatomite is added into the aerobic treatment chamber, a blower is opened, and continuous aeration is carried out to the aerobic treatment chamber through an aeration pipe; the sewage in the aerobic treatment chamber is accelerated and stirred under the action of an accelerator;
s3, sewage treated by the aerobic treatment chamber flows into the solid-liquid separation chamber through a communication port III arranged on a partition plate III, a valve on an aeration pipe II is opened, the sewage in the solid-liquid separation chamber is subjected to aeration treatment, the compound diatomite moves upwards and is enriched on a filter screen, clear water penetrates through the filter screen, and is discharged from a water outlet above the filter screen;
s4, the compound diatomite sewage enriched on the filter screen flows into a pretreatment chamber through a water return port and a water return pipe under the action of a water pump, and is recycled;
s5, discharging the sludge precipitated in the pretreatment chamber through a sludge pump.
2. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S1, the first communication port is positioned at the upper part of the first partition plate.
3. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S2, the communication port is positioned at the lower part of the second partition plate.
4. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S2, an air outlet of the first aeration pipe is positioned right below the accelerator.
5. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S2, the accelerator comprises an upper cone part and a lower cone part, and the upper cone part is connected with the lower cone part through a cylindrical connecting part.
6. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S2, the preparation method of the compound diatomite comprises the following steps,
s21, adding hydrochloric acid solution with the concentration of 3-4mol/L into diatomite with the granularity of 100-200 meshes, performing ultrasonic treatment for 1-2 hours, washing to be neutral, and calcining for 1-2 hours at the temperature of 500-600 ℃ to obtain activated diatomite;
s22, soaking the activated diatomite in a flocculant solution, and drying to obtain modified diatomite;
s23, mixing the modified diatomite with microorganism bacteria to obtain the compound diatomite.
7. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 6, wherein: in the step S21, the volume ratio of the diatomite to the hydrochloric acid is 1:2-3.
8. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 6, wherein: in the step S22, the flocculant is a microbial flocculant.
9. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 6, wherein: in S23, the microbial bacteria include nitrifying bacteria, photosynthetic bacteria, bacillus, lactic acid bacteria, and polyphosphoric bacteria.
10. The wastewater treatment process utilizing a combination of a compound diatomite and an ICEAS process as set forth in claim 1, wherein: in the step S3, the communication port III is positioned at the lower part of the partition board III, and the aeration pipe II is inserted into the solid-liquid separation chamber through the communication port III.
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