CN110577328A - Sewage reinforced biological nitrogen and phosphorus removal process - Google Patents
Sewage reinforced biological nitrogen and phosphorus removal process Download PDFInfo
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- CN110577328A CN110577328A CN201910843484.9A CN201910843484A CN110577328A CN 110577328 A CN110577328 A CN 110577328A CN 201910843484 A CN201910843484 A CN 201910843484A CN 110577328 A CN110577328 A CN 110577328A
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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
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
the invention discloses a sewage enhanced biological nitrogen and phosphorus removal process. The sewage firstly enters the anaerobic section, is mixed with the sludge-water mixed liquor which flows back from the anaerobic section and is subjected to anaerobic reaction; then the sludge-water mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with the sludge-water mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, and part of the sludge-water mixed liquor subjected to anoxic reaction flows back to the anaerobic section; and finally, the muddy water mixed liquor flowing out of the anoxic section enters the aerobic section, the aerobic section is a reaction precipitation integrated rectangular airlift loop bioreactor, aerobic reaction, biological phosphorus absorption reaction and muddy water separation are simultaneously carried out in the aerobic section, a part of muddy water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after muddy water separation is treated by a suspended matter deep removal device and then is used as final effluent of the process. The process has the advantages of small occupied area, short total hydraulic retention time and low energy consumption.
Description
Technical Field
The invention relates to a sewage treatment process, in particular to a sewage enhanced biological nitrogen and phosphorus removal process.
Background
The biological process of nitrogen and phosphorus removal from sewage generally comprises anaerobic, anoxic and aerobic biological reactions, and is realized by serially arranging an anaerobic section (tank), an anoxic section (tank) and an aerobic section (tank), which are generally called AAO process for short. The anaerobic section mainly has the function of leading the microorganism to generate phosphorus release reaction in the anaerobic environment so that the microorganism can absorb excessive phosphorus when reaching the aerobic section, thereby realizing the enhanced biological phosphorus removal. Soluble ammonia nitrogen in the sewage is nitrified into nitrate nitrogen by nitrifying bacteria in an aerobic section (tank), and the nitrate nitrogen flows back to an anoxic section (tank) to be denitrified into nitrogen, so that the enhanced denitrification process of the sewage is completed. After such conventional processes, it is generally necessary to provide a secondary sedimentation tank for sludge-water separation and return the precipitated sludge to the anaerobic stage to maintain the microbial concentration in each stage of the process, which is generally referred to as external reflux, while the mixed liquor in the aerobic stage must be returned to the anoxic stage for denitrification, which is generally referred to as internal reflux. The traditional AAO process has the defects of large floor area, long total hydraulic retention time, high energy consumption and the like.
Disclosure of Invention
The invention aims to solve the problems of large occupied area, long total hydraulic retention time, high energy consumption and the like in the prior art and provides a sewage enhanced biological nitrogen and phosphorus removal process.
In order to achieve the above purpose, the invention provides the following technical scheme:
A sewage reinforced biological nitrogen and phosphorus removal process comprises an anaerobic section, an anoxic section and an aerobic section, and comprises the following steps:
Firstly, sewage enters the anaerobic section, is mixed with sludge-water mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction; step two, the sludge-water mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with the sludge-water mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sludge-water mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sludge-water mixed liquor flows back to the anaerobic section; and step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift circulation bioreactor, the sludge-water mixed liquor flowing out of the anoxic section enters the aerobic section, then enters the reaction and precipitation integrated rectangular air-lift circulation bioreactor to simultaneously perform aerobic reaction, biological phosphorus absorption reaction and sludge-water separation, part of the sludge-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after sludge-water separation is treated by a suspended matter deep removal device to be used as final effluent of the process.
The reaction and precipitation integrated rectangular airlift loop bioreactor is the patented technology invented by the inventor, and the structure of the reactor is not described in detail in the specification. The reaction-precipitation integrated rectangular airlift loop bioreactor of the present invention can be constructed by any one of the methods disclosed in the following 6 patents: publication No. CN106186293A, aerobic three-phase separator and its application method in sewage treatment; publication No. CN106145316A, aerobic three-phase separator with flow guide pipe and its application method in sewage treatment; the publication No. CN207361869U, an aerobic three-phase separator arranged outside the draft tube; no. CN202849149U, aerobic three-phase separator; publication No. CN107827234A, a device and method for installing an aerobic three-phase separator without stopping production; publication No. CN207418381U, an aerobic three-phase separator. The beneficial effects are that: a reasonable sewage mixed liquid reflux mode is adopted, meanwhile, a reaction and precipitation integrated rectangular air-lift circulation bioreactor is adopted, the mass transfer effect in the reaction process is enhanced by using the circulation effect, so that the treatment efficiency is improved, and the reaction and precipitation integrated structure effectively utilizes the facility space, so that the process has the advantages of small occupied area, short total hydraulic retention time and low energy consumption.
Further, the ratio of the return flow of the mixed liquid from the anoxic section to the anaerobic section to the sewage inflow is controlled to be 1-2. The beneficial effects are that: the biological phosphorus removal is enhanced, so that the total phosphorus removed by the biological phosphorus absorption effect is more.
Further, the ratio of the return flow of the mixed liquid from the aerobic section to the anoxic section to the sewage inflow is controlled to be 2-4. The beneficial effects are that: enhances biological denitrification and improves the total nitrogen removal efficiency.
Furthermore, the mixed liquor flowing back from the aerobic section to the anoxic section is collected and converged by a multi-point mixed liquor collecting system distributed in the reaction-precipitation integrated rectangular airlift loop bioreactor and then is sent to the anoxic section, and the multi-point mixed liquor collecting system is composed of a plurality of gas stripping liquid collecting devices.
Preferably, the anaerobic section is in the form of an annular channel, and is stirred by an underwater impeller. The beneficial effects are that: sewage constantly flows in the annular ditch, and rethread underwater impeller constantly stirs, and mud and sewage can carry out intensive mixing to make the reaction more abundant, improved sewage treatment efficiency.
preferably, the anoxic section is in the form of a circular canal, and is stirred by an underwater impeller. The beneficial effects are that: the muddy water continuously flows in the annular ditch and is continuously stirred by the underwater propeller, and the sludge and the sewage can be fully mixed, so that the anoxic reaction is more sufficient, and the sewage treatment efficiency is improved.
Preferably, a chemical phosphorus removal agent is added before the effluent of the anoxic section enters the aerobic section, so that the chemical agent enters the reaction-precipitation integrated rectangular airlift loop bioreactor along with water flow and then is uniformly subjected to chemical phosphorus removal reaction through aeration and stirring. The beneficial effects are that: the chemical phosphorus removal agent has better phosphorus removal effect through aeration and stirring.
Generally, the suspended matter deep removal device is a sand filter.
Generally, the suspended matter deep removal device is a cloth filter.
generally, the suspended matter deep removal device is a magnetic coagulation sedimentation device, and a chemical phosphorus removal agent is added into the effluent of the reaction sedimentation integrated rectangular airlift loop bioreactor, so that the chemical agent enters the magnetic coagulation sedimentation tank along with the effluent to perform chemical phosphorus removal.
Compared with the prior art, the invention has the beneficial effects that:
1. The total hydraulic retention time is short, and the occupied area of the process is small.
2. High oxygen dissolving efficiency and energy saving.
3. The operation is stable, and the denitrification effect is better.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in figure 1, the enhanced biological nitrogen and phosphorus removal process for sewage comprises an anaerobic section, an anoxic section and an aerobic section.
The following three processing steps are taken:
Firstly, sewage enters the anaerobic section, is mixed with sewage mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction; the anaerobic section adopts a ring ditch form and utilizes an underwater impeller to stir.
Step two, sewage mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with sewage mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sewage mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sewage mixed liquor flows back to the anaerobic section; the anoxic section adopts a ring ditch form and utilizes an underwater impeller to stir.
and step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift circulation bioreactor, the sewage mixed liquor flowing out of the anoxic section enters the aerobic section, namely enters the reaction and precipitation integrated rectangular air-lift circulation bioreactor to simultaneously carry out aerobic reaction, biological phosphorus absorption reaction and mud-water separation, a part of mud-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after mud-water separation is treated by a suspended matter deep removal device to be used as final effluent of the process. The mixed liquor which flows back from the aerobic section to the anoxic section is collected and converged by a multi-point mixed liquor collecting system distributed in the reaction and precipitation integrated rectangular airlift loop bioreactor and then is sent to the anoxic section, and the multi-point mixed liquor collecting system is composed of a plurality of gas stripping liquid collecting devices. The suspended matter deep removal device is a sand filter.
For certain domestic sewage (COD320 mg/L, ammonia nitrogen 40mg/L, total nitrogen 45mg/L, total phosphorus 4.5mg/L), the designed retention time of each section is respectively as follows: the anaerobic section is 1 hour, the anoxic section is 3.5 hours, the reaction and precipitation integrated rectangular airlift loop bioreactor is 8.5 hours, the reflux ratio of mixed liquor from the anoxic section to the anaerobic section is controlled to be 1 during operation, the reflux ratio of mixed liquor from the reaction and precipitation integrated rectangular airlift loop bioreactor to the anoxic section is 2.5, ferric salt is added before effluent from the anoxic section enters the reaction and precipitation integrated rectangular airlift loop bioreactor for assisting chemical phosphorus removal, suspended matters are removed from effluent from the reaction and precipitation integrated rectangular airlift loop bioreactor through a sand filter, after stable operation is achieved, COD (chemical oxygen demand) of final effluent is less than 40mg/L, total nitrogen is less than 12mg/L, total phosphorus is less than 0.4mg/L, and the power consumption per ton of water is less than 0.30 kWh.
Example 2
As shown in figure 1, the enhanced biological nitrogen and phosphorus removal process for sewage comprises an anaerobic section, an anoxic section and an aerobic section.
the following three processing steps are taken:
Firstly, sewage enters an anaerobic section, is mixed with sewage mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction; the anaerobic section adopts a ring ditch form and utilizes an underwater impeller to stir.
Step two, sewage mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with sewage mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sewage mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sewage mixed liquor flows back to the anaerobic section; the anoxic section adopts a ring ditch form and utilizes an underwater impeller to stir.
And step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift loop bioreactor, the sewage mixed liquor flowing out of the anoxic section enters the aerobic section, namely enters the reaction and precipitation integrated rectangular air-lift loop bioreactor to simultaneously carry out aerobic reaction, biological phosphorus absorption reaction and mud-water separation, a part of mud-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after mud-water separation is treated by a suspended matter deep removal device to be used as final effluent of the process. The mixed liquor which flows back from the aerobic section to the anoxic section is collected and converged by a multi-point mixed liquor collecting system distributed in the reaction and precipitation integrated rectangular airlift loop bioreactor and then is sent to the anoxic section, and the multi-point mixed liquor collecting system is composed of a plurality of gas stripping liquid collecting devices. The suspended matter deep removal device is a cloth filter.
For certain domestic sewage (COD350 mg/L, ammonia nitrogen 45mg/L, total nitrogen 50mg/L and total phosphorus 4.5mg/L), the designed retention time of each section is respectively as follows: the anaerobic section is 1 hour, the anoxic section is 4 hours, the reaction precipitation integrated rectangular airlift loop bioreactor is 9 hours, the reflux ratio of mixed liquor from the anoxic section to the anaerobic section is controlled to be 1 during operation, the reflux ratio of mixed liquor from the reaction precipitation integrated rectangular airlift loop bioreactor to the anoxic section is 3, aluminum salt is added before effluent from the anoxic section enters the reaction precipitation integrated rectangular airlift loop bioreactor for auxiliary chemical phosphorus removal, suspended matters in effluent from the reaction precipitation integrated rectangular airlift loop bioreactor are removed through a cloth filter, after stable operation is achieved, COD (chemical oxygen demand) of final effluent is less than 40mg/L, total nitrogen is less than 10mg/L, total phosphorus is less than 0.35mg/L, and the ton water electricity consumption is less than 0.33 kWh.
Example 3
As shown in figure 1, the enhanced biological nitrogen and phosphorus removal process for sewage comprises an anaerobic section, an anoxic section and an aerobic section.
The following three processing steps are taken:
Firstly, sewage enters an anaerobic section, is mixed with sewage mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction; the anaerobic section adopts a ring ditch form and utilizes an underwater impeller to stir.
step two, sewage mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with sewage mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sewage mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sewage mixed liquor flows back to the anaerobic section; the anoxic section adopts a ring ditch form and utilizes an underwater impeller to stir.
And step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift circulation bioreactor, the sewage mixed liquor flowing out of the anoxic section enters the aerobic section, namely enters the reaction and precipitation integrated rectangular air-lift circulation bioreactor to simultaneously perform aerobic reaction, biological phosphorus absorption reaction and mud-water separation, a part of mud-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after mud-water separation is treated by a magnetic coagulation precipitation device to be used as final effluent of the process. The mixed liquor which flows back from the aerobic section to the anoxic section is collected and converged by a multi-point mixed liquor collecting system distributed in the reaction and precipitation integrated rectangular airlift loop bioreactor and then is sent to the anoxic section, and the multi-point mixed liquor collecting system is composed of a plurality of gas stripping liquid collecting devices.
for certain domestic sewage (COD300 mg/L, ammonia nitrogen 40mg/L, total nitrogen 50mg/L, total phosphorus 4mg/L), the designed retention time of each section is respectively: the anaerobic section is 1.5 hours, the anoxic section is 3 hours, the reaction and precipitation integrated rectangular airlift loop bioreactor is 8 hours, the reflux ratio of mixed liquor from the anoxic section to the anaerobic section is controlled to be 1.5 during operation, the reflux ratio of mixed liquor from the reaction and precipitation integrated rectangular airlift loop bioreactor to the anoxic section is 2, ferric salt is added into effluent of the reaction and precipitation integrated rectangular airlift loop bioreactor for assisting chemical phosphorus removal, water is discharged after magnetic coagulation precipitation, after stable operation is achieved, COD (chemical oxygen demand) of final effluent is less than 30mg/L, total nitrogen is less than 8mg/L, total phosphorus is less than 0.3mg/L, and the power consumption per ton water is less than 0.32 kWh.
Example 4
as shown in figure 1, the enhanced biological nitrogen and phosphorus removal process for sewage comprises an anaerobic section, an anoxic section and an aerobic section.
the following three processing steps are taken:
Firstly, sewage enters the anaerobic section, is mixed with sewage mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction; the anaerobic section adopts a ring ditch form and utilizes an underwater impeller to stir.
Step two, sewage mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with sewage mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sewage mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sewage mixed liquor flows back to the anaerobic section; the anoxic section adopts a ring ditch form and utilizes an underwater impeller to stir. Chemical phosphorus removal agents are added before the effluent of the anoxic section enters the aerobic section, so that the chemical agents enter the reaction-precipitation integrated rectangular airlift loop bioreactor along with water flow and then are uniformly stirred by aeration to generate chemical phosphorus removal reaction.
And step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift circulation bioreactor, the sewage mixed liquor flowing out of the anoxic section enters the aerobic section, namely enters the reaction and precipitation integrated rectangular air-lift circulation bioreactor to simultaneously carry out aerobic reaction, biological phosphorus absorption reaction and mud-water separation, a part of mud-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after mud-water separation is treated by a magnetic coagulation sedimentation tank to be used as final effluent of the process. The mixed liquor which flows back from the aerobic section to the anoxic section is collected and converged by a multi-point mixed liquor collecting system distributed in the reaction and precipitation integrated rectangular airlift loop bioreactor and then is sent to the anoxic section, and the multi-point mixed liquor collecting system is composed of a plurality of gas stripping liquid collecting devices.
For certain domestic sewage (COD400 mg/L, ammonia nitrogen 40mg/L, total nitrogen 50mg/L, total phosphorus 5mg/L), the designed retention time of each section is respectively as follows: the anaerobic section is 1.5 hours, the anoxic section is 3.5 hours, the reaction and precipitation integrated rectangular airlift loop bioreactor is 9 hours, the reflux ratio of mixed liquor from the anoxic section to the anaerobic section is controlled to be 1.5 during operation, the reflux ratio of mixed liquor from the reaction and precipitation integrated rectangular airlift loop bioreactor to the anoxic section is 2.5, aluminum salt is added into effluent of the reaction and precipitation integrated rectangular airlift loop bioreactor to assist chemical phosphorus removal, water is discharged after magnetic coagulation precipitation, after stable operation is achieved, COD (chemical oxygen demand) of final effluent is less than 35mg/L, total nitrogen is less than 8mg/L, total phosphorus is less than 0.3mg/L, and power consumption per ton water is less than 0.35 kWh.
Claims (10)
1. A sewage reinforced biological nitrogen and phosphorus removal process comprises an anaerobic section, an anoxic section and an aerobic section, and is characterized by comprising the following steps:
Firstly, sewage enters the anaerobic section, is mixed with sewage mixed liquor flowing back from the anaerobic section and is subjected to anaerobic reaction;
Step two, sewage mixed liquor flowing out of the anaerobic section enters the anoxic section, is mixed with sewage mixed liquor flowing back from the aerobic section and is subjected to anoxic reaction, one part of the sewage mixed liquor subjected to anoxic reaction flows into the aerobic section, and the other part of the sewage mixed liquor flows back to the anaerobic section;
And step three, the aerobic section is a reaction and precipitation integrated rectangular air-lift loop bioreactor, the sewage mixed liquor flowing out of the anoxic section enters the aerobic section, then enters the reaction and precipitation integrated rectangular air-lift loop bioreactor to simultaneously perform aerobic reaction, biological phosphorus absorption reaction and mud-water separation, a part of the mud-water mixed liquor in the aerobic section flows back to the anoxic section, and clear water after mud-water separation is treated by a suspended matter deep removal device to be used as final effluent of the process.
2. The enhanced biological nitrogen and phosphorus removal process for sewage as claimed in claim 1, wherein the ratio of the backflow amount of the sludge-water mixed liquid from the anoxic section to the anaerobic section to the sewage inflow amount is β 1, and β 1 is greater than or equal to 1 and less than or equal to 2.
3. The process of claim 2, wherein the ratio of the reflux amount of the mixed liquid flowing back from the aerobic section to the anoxic section to the water inflow amount of the sewage is β 2, and β 2 is greater than or equal to 2 and less than or equal to 4.
4. The process of claim 3, wherein the mixed liquor flowing back from the aerobic section to the anoxic section is collected and merged by a multi-point mixed liquor collection system distributed in the reaction-precipitation integrated rectangular airlift loop bioreactor and then sent to the anoxic section, and the multi-point mixed liquor collection system comprises a plurality of gas stripping liquid collection devices.
5. The enhanced biological nitrogen and phosphorus removal process from wastewater as claimed in claim 4, wherein said anaerobic section is in the form of an annular trench, and is agitated by an underwater impeller.
6. The enhanced biological nitrogen and phosphorus removal process from wastewater as claimed in claim 4, wherein the anoxic section is in the form of an annular trench, and is stirred by an underwater flow impeller.
7. The enhanced biological nitrogen and phosphorus removal process for sewage as claimed in claim 5 or 6, wherein a chemical phosphorus removal agent is added before the effluent of the anoxic section enters the aerobic section, so that the chemical phosphorus removal reaction can be uniformly carried out by aeration and stirring after the chemical agent enters the reaction-precipitation integrated rectangular airlift loop bioreactor along with the water flow.
8. The enhanced biological nitrogen and phosphorus removal process for sewage as claimed in claim 1, wherein said suspended matter deep removal device is a sand filter.
9. The enhanced biological nitrogen and phosphorus removal process for sewage as claimed in claim 1, wherein said suspended matter deep removal device is a cloth filter.
10. The enhanced biological nitrogen and phosphorus removal process for sewage as claimed in claim 1, wherein the depth removal device for suspended matters is a magnetic coagulation sedimentation device, and a chemical phosphorus removal agent is added into the effluent of the reaction-sedimentation integrated rectangular airlift loop bioreactor, so that the chemical phosphorus removal agent enters the magnetic coagulation sedimentation tank along with the effluent to perform chemical phosphorus removal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114604970A (en) * | 2022-05-11 | 2022-06-10 | 北京博汇特环保科技股份有限公司 | Improved A2O biochemical reaction system and sewage treatment method |
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| CN114604970A (en) * | 2022-05-11 | 2022-06-10 | 北京博汇特环保科技股份有限公司 | Improved A2O biochemical reaction system and sewage treatment method |
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Address after: C527, 5 / F, Research Institute, Tsinghua University, No. 019, Gaoxin South 7th Road, community, high tech Zone, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Applicant after: Qingyan Environmental Technology Co.,Ltd. Address before: C527, 5 / F, Research Institute, Tsinghua University, No. 019, Gaoxin South 7th Road, community, high tech Zone, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN QINGYAN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
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Application publication date: 20191217 |