CN113023887A - Phosphorus enrichment method and system based on membrane bioreactor - Google Patents
Phosphorus enrichment method and system based on membrane bioreactor Download PDFInfo
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- CN113023887A CN113023887A CN202110148193.5A CN202110148193A CN113023887A CN 113023887 A CN113023887 A CN 113023887A CN 202110148193 A CN202110148193 A CN 202110148193A CN 113023887 A CN113023887 A CN 113023887A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 146
- 239000011574 phosphorus Substances 0.000 title claims abstract description 146
- 239000012528 membrane Substances 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 241000894006 Bacteria Species 0.000 claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 239000010865 sewage Substances 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims abstract description 11
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 6
- 239000010452 phosphate Substances 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 5
- 239000002351 wastewater Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 239000012510 hollow fiber Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000010842 industrial wastewater Substances 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 description 10
- 238000005273 aeration Methods 0.000 description 4
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 4
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002367 phosphate rock Substances 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009294 enhanced biological phosphorus removal Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- 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
- C02F3/34—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
- 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
- C02F2001/5218—Crystallization
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a phosphorus enrichment method and a system based on a membrane bioreactor, wherein phosphorus accumulating bacteria are cultured in the membrane bioreactor; the membrane bioreactor alternately operates under aerobic and anaerobic conditions, phosphorus-accumulating bacteria absorb phosphorus in the inlet water under the aerobic condition, and the phosphorus-accumulating bacteria release phosphate to the enrichment pool under the anaerobic condition so as to enrich the phosphorus. The invention can be directly used for enriching phosphorus in domestic sewage and industrial wastewater, reaches the phosphorus concentration standard of phosphorus recovery by a crystallization method, can reduce the outflow of sludge due to the existence of the membrane component, simultaneously intercepts phosphorus-accumulating bacteria, is completely reserved in the membrane bioreactor, ensures that phosphorus absorption/release is carried out smoothly, and can greatly reduce the pollution of the membrane and prolong the service life of the membrane under the operation of aerobic/anaerobic alternate operation.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a phosphorus enrichment method and system.
Background
Phosphorus has pollution and scarcity, the total storage of the phosphorite in the world is about 500 hundred million tons in 2019, the economic storage is less than 180 hundred million tons, and the available year of the global phosphorite resource is less than 70 years according to the current exploitation speed. Moreover, the phosphorus recovered from the urban sewage plant can meet the requirement of 15-20 percent of phosphorus. Phosphorus in sewage treatment plants becomes an important place for phosphorus resources.
Currently, in the existing phosphorus recovery process, the enhanced biological phosphorus removal system is based on a suspended activated sludge method, phosphorus is recovered from excess sludge through a flow measurement phosphorus process, and there are three main methods for recovering phosphorus from excess sludge: biological, wet chemical, thermal, all three of which are energy intensive (heat) or chemically intensive (treatment with strong acid/base). In addition, the three methods need facilities such as an anaerobic digestion tank and an incinerator. The purpose of sludge-water separation can be achieved by adopting the membrane bioreactor, and the discharge of sludge can be greatly reduced. Meanwhile, the technology has high microorganism concentration and can greatly play the role of removing phosphorus by microorganisms.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a phosphorus enrichment method and a system based on a membrane bioreactor.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a phosphorus enrichment method based on a membrane bioreactor, which comprises culturing phosphorus accumulating bacteria in the membrane bioreactor; the membrane bioreactor alternately operates under aerobic and anaerobic conditions, phosphorus-accumulating bacteria absorb phosphorus in the inlet water under the aerobic condition, and the phosphorus-accumulating bacteria release phosphate to the enrichment pool under the anaerobic condition so as to enrich the phosphorus.
Further, under aerobic conditions, the inlet water is phosphorus-containing wastewater; under the anaerobic condition, the inlet water is rich phosphorus concentrated solution in the enrichment pool.
Further, under aerobic conditions, the phosphorus-containing wastewater is pumped into a membrane bioreactor, passes through a phosphorus absorption process of phosphorus accumulating bacteria and is subjected to mud-water separation by a membrane component in the membrane bioreactor, and the wastewater reaches the standard and is discharged; under the anaerobic condition, the phosphorus-rich concentrated solution in the enrichment pool is pumped into the membrane bioreactor, the concentration of the phosphorus-rich concentrated solution is increased through the phosphorus release process of phosphorus accumulating bacteria, and the phosphorus-rich concentrated solution flows back to the enrichment pool after mud-water separation of a membrane component in the membrane bioreactor.
Further, under the anaerobic condition, a degradation carbon source is added for the phosphorus-accumulating bacteria to absorb and convert into PHA, and the PHA provides energy for the phosphorus-accumulating bacteria to absorb phosphorus under the aerobic condition.
Further, when the phosphorus concentration of the enrichment pool is more than 50mg/L, the phosphorus in the enrichment liquid is recovered by adopting a crystallization method.
Furthermore, activated sludge from an oxidation ditch of a sewage treatment plant is used for culturing the phosphorus-accumulating bacteria.
Further, when the transmembrane pressure difference of the membrane bioreactor reaches 30kpa, the physical and chemical cleaning of the membrane module is carried out.
A phosphorus enrichment system based on a membrane bioreactor comprises a membrane bioreactor, a water inlet device, a phosphorus enrichment device and a control system; the control system is respectively electrically connected with the membrane bioreactor, the water inlet device and the phosphorus enrichment device; the membrane bioreactor cultures the phosphorus-accumulating bacteria, and the membrane bioreactor alternately operates under aerobic and anaerobic conditions under the control of the control system; the water inlet device pumps phosphorus-containing wastewater into the membrane bioreactor under an aerobic condition, and pumps phosphorus-rich concentrated solution into the enrichment pool into the membrane bioreactor under an anaerobic condition; the phosphorus enrichment device is used for monitoring the phosphorus concentration in the enrichment pool and recovering phosphorus after the phosphorus concentration reaches a threshold value.
Further, at least two groups of membrane bioreactors which are connected in parallel are arranged.
Further, the membrane module in the membrane bioreactor is a U-shaped hollow fiber membrane module or a flat membrane.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the invention adopts a phosphorus enrichment process based on the membrane bioreactor, achieves the effects of removing phosphorus and enriching phosphorus by aerobic/anaerobic alternation, greatly reduces the discharge of sludge due to the existence of the membrane module, ensures the abundance of phosphorus-accumulating bacteria of the membrane bioreactor, can achieve the purpose of separating mud from water, and further ensures the clarity of the effluent. The pollution of the membrane can be greatly reduced and the service life of the membrane can be prolonged by the operation of aerobic/anaerobic alternate operation. Meanwhile, phosphorus is directly recovered from the enriched liquid by a crystallization method, so that energy waste caused by recovering phosphorus from solids is avoided.
Drawings
FIG. 1 is a schematic flow chart of the operation of the present invention; the reference numerals in fig. 1 illustrate: 1. a carbon source tank; 2. a water inlet pump; 3. an aeration device; 4. an aeration strip; 5. 8, 11, a control valve; 6. 9, 10, a pressure pump; 12. an enrichment pool;
FIG. 2 is a schematic diagram of four sets of membrane bioreactors in parallel;
FIG. 3 is a schematic diagram of condition one
FIG. 4 is a schematic illustration of condition two;
FIG. 5 is a schematic illustration of condition three;
FIG. 6 is a schematic illustration of condition four; the dashed lines in fig. 3-6 indicate that the valve/pump is in a closed state.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
The invention designs a phosphorus enrichment method based on a membrane bioreactor, which comprises the steps of culturing phosphorus accumulating bacteria in the membrane bioreactor; the membrane bioreactor alternately operates under aerobic and anaerobic conditions, phosphorus-accumulating bacteria absorb phosphorus in the inlet water under the aerobic condition, and the phosphorus-accumulating bacteria release phosphate to the enrichment pool under the anaerobic condition so as to enrich the phosphorus. In the aerobic stage, the inlet water is phosphorus-containing wastewater such as domestic sewage, industrial wastewater and the like; under the anaerobic condition, the inlet water is rich phosphorus concentrated solution in the enrichment pool. In an aerobic stage, pumping the phosphorus-containing wastewater into a membrane bioreactor, and discharging the wastewater after reaching the standard after the phosphorus absorption process of phosphorus accumulating bacteria and mud-water separation of a membrane component in the membrane bioreactor; in the anaerobic stage, the phosphorus-rich concentrated solution in the enrichment pool is pumped into the membrane bioreactor, the concentration of the phosphorus-rich concentrated solution is increased through the phosphorus release process of phosphorus accumulating bacteria, and the phosphorus-rich concentrated solution flows back to the enrichment pool after mud-water separation of a membrane component in the membrane bioreactor.
Correspondingly, the invention also designs a phosphorus enrichment system based on the membrane bioreactor, which comprises the membrane bioreactor, a water inlet device, a phosphorus enrichment device and a control system. The control system is respectively and electrically connected with the membrane bioreactor, the water inlet device and the phosphorus enrichment device. The membrane bioreactor cultures the phosphorus-accumulating bacteria, and the membrane bioreactor alternately operates under aerobic and anaerobic conditions under the control of the control system. The water inlet device pumps the phosphorus-containing wastewater into the membrane bioreactor under the aerobic condition, and pumps the phosphorus-rich concentrated solution into the enrichment pool into the membrane bioreactor under the anaerobic condition. The phosphorus enrichment device is used for monitoring the phosphorus concentration in the enrichment pool and recovering phosphorus after the phosphorus concentration reaches a threshold value.
Referring to fig. 1, in an aerobic stage, phosphorus-containing wastewater such as domestic sewage, industrial wastewater and the like flows into a membrane bioreactor, an aeration device 3 is opened for aeration to form an aerobic environment, phosphorus-accumulating bacteria absorb phosphorus in the inlet water, then a control valve 8 and a pressure pump 9 are opened, and the wastewater is discharged through a membrane component 7 with a mud-water separation function. In the anaerobic stage, a phosphorus-rich solution in the enrichment pool is pumped into the membrane bioreactor through a control valve 11 and a pressure pump 10, meanwhile, a carbon source is pumped into the membrane bioreactor from a carbon source tank 1 through a water inlet pump 2, phosphorus-accumulating bacteria absorb the carbon source and store the carbon source in cells in the form of PHA (polyhydroxyalkanoate), then phosphorus in the body is released into the phosphorus-rich solution, then the control valve 5 and the pressure pump 6 are opened, and wastewater is pumped back to the enrichment pool through a membrane component 7 with a mud-water separation effect.
Referring to fig. 2, four groups of membrane bioreactors connected in parallel are taken as an example, and correspond to four different stages: water inlet, phosphorus absorption, anaerobic water inlet and anaerobic reflux. The total residence time was 6h, 1.5h for each stage.
FIG. 3 shows the operation state of working condition one, where the membrane bioreactor A is in the water inlet stage, the membrane bioreactor B is in the phosphorus absorption stage, the membrane bioreactor C is in the anaerobic water inlet stage, and the membrane bioreactor D is in the anaerobic reflux stage. The membrane bioreactor A is in a water inlet stage, the valve 1 is opened, and the phosphorus-containing wastewater flows into the membrane bioreactor A; the membrane bioreactor B is in a phosphorus absorption stage, and after aerobic phosphorus absorption is finished, sewage passes through the membrane module and is discharged after reaching the standard through the pump 6; the membrane bioreactor C is in an anaerobic water inlet stage, the valve 7 and the pump 7 are opened, and the enriched liquid is pumped into the membrane bioreactor C through the pump 7; the membrane bioreactor D is in an anaerobic reflux stage, after anaerobic phosphorus release, the valve 10 and the pump 11 are opened, and the enrichment liquid passes through the membrane module and then is pumped back to the enrichment pool through the pump 11.
FIG. 4 shows the operation state of the second operating mode, where the membrane bioreactor A is in the phosphorus absorption stage, the membrane bioreactor B is in the anaerobic water inlet stage, the membrane bioreactor C is in the anaerobic reflux stage, and the membrane bioreactor D is in the water inlet stage. The membrane bioreactor A is in a phosphorus absorption stage, and after aerobic phosphorus absorption is finished, sewage passes through the membrane module and is discharged after reaching the standard through the pump 1; the membrane bioreactor B is in an anaerobic water inlet stage, and the enriched liquid is pumped into the membrane bioreactor B through a pump 4; the membrane bioreactor C is in an anaerobic reflux stage, after anaerobic phosphorus release, the valve 9 and the pump 9 are opened, and the enrichment liquid passes through the membrane module and then is pumped back to the enrichment pool through the pump 9; the membrane bioreactor D is in the water inlet stage, the valve 4 is opened, and the phosphorus-containing wastewater flows into the membrane bioreactor D.
FIG. 5 shows the operation state of the third operating mode, where the membrane bioreactor A is in the anaerobic water inlet stage, the membrane bioreactor B is in the anaerobic reflux stage, the membrane bioreactor C is in the water inlet stage, and the membrane bioreactor D is in the anaerobic reflux stage. The membrane bioreactor A is in an anaerobic water inlet stage, the valve 5 and the pump 3 are opened, and the enriched liquid is pumped into the membrane bioreactor A through the pump 3; the membrane bioreactor B is in an anaerobic reflux stage, after anaerobic phosphorus release, the valve 6 and the pump 5 are opened, and the enrichment liquid passes through the membrane module and then is pumped back to the enrichment pool through the pump 5; the membrane bioreactor C is in the water inlet stage, the valve 3 is opened, and the phosphorus-containing wastewater flows into the membrane bioreactor C; the membrane bioreactor D is in a phosphorus absorption stage, and after aerobic phosphorus absorption is finished, sewage passes through the membrane module and is discharged after reaching the standard through the pump 12.
FIG. 6 shows the operating state of working condition four, where the membrane bioreactor A is in the anaerobic reflux stage, the membrane bioreactor B is in the water intake stage, the membrane bioreactor C is in the phosphorus absorption stage, and the membrane bioreactor D is in the anaerobic water intake stage. The membrane bioreactor A is in an anaerobic reflux stage, after anaerobic phosphorus release, the valve 4 and the pump 2 are opened, and the enrichment liquid passes through the membrane module and then is pumped back to the enrichment pool through the pump 2; the membrane bioreactor B is in a water inlet stage, the valve 2 is opened, and the phosphorus-containing wastewater flows into the membrane bioreactor B; the membrane bioreactor C is in a phosphorus absorption stage, and after aerobic phosphorus absorption is finished, sewage passes through the membrane module and is discharged after reaching the standard through the pump 10. The membrane bioreactor D is in an anaerobic water inlet stage, the valve 8 and the pump 8 are opened, and the enriched liquid is pumped into the membrane bioreactor D through the pump 8.
Continuous operation of the process can be realized by switching the working condition I, the working condition II, the working condition III and the working condition IV back and forth, intermittent enrichment of phosphorus is realized, the concentration of phosphate in the liquid to be enriched reaches the phosphorus concentration standard (> 50 mg/L) of phosphorus recovered by a crystallization method, recovery work is carried out, clean water is used for replacing the phosphorus-rich concentrated liquid, and enrichment operation of phosphorus is carried out again.
The invention can remove phosphorus from phosphorus-containing sewage such as domestic sewage, industrial wastewater and the like, thereby realizing the enrichment of phosphate under the operation of anaerobic/aerobic alternate operation and further realizing the recovery of phosphorus. Compared with the existing activated sludge method, the process has less sludge discharge amount and can directly enrich and recover phosphorus from sewage. The existing process mainly recovers phosphorus from sludge, has less energy consumption compared with the existing process, and can meet the low energy consumption requirement of the urban sewage treatment plant in the future.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.
Claims (10)
1. A phosphorus enrichment method based on a membrane bioreactor is characterized in that: culturing phosphorus accumulating bacteria in a membrane bioreactor; the membrane bioreactor alternately operates under aerobic and anaerobic conditions, phosphorus-accumulating bacteria absorb phosphorus in the inlet water under the aerobic condition, and the phosphorus-accumulating bacteria release phosphate to the enrichment pool under the anaerobic condition so as to enrich the phosphorus.
2. The membrane bioreactor-based phosphorus enrichment method of claim 1, wherein: under aerobic conditions, the inlet water is phosphorus-containing wastewater; under the anaerobic condition, the inlet water is rich phosphorus concentrated solution in the enrichment pool.
3. The membrane bioreactor-based phosphorus enrichment method of claim 2, wherein: under aerobic conditions, pumping the phosphorus-containing wastewater into a membrane bioreactor, performing phosphorus absorption process of phosphorus accumulating bacteria, and performing mud-water separation by a membrane component in the membrane bioreactor to ensure that the wastewater reaches the standard and is discharged; under the anaerobic condition, the phosphorus-rich concentrated solution in the enrichment pool is pumped into the membrane bioreactor, the concentration of the phosphorus-rich concentrated solution is increased through the phosphorus release process of phosphorus accumulating bacteria, and the phosphorus-rich concentrated solution flows back to the enrichment pool after mud-water separation of a membrane component in the membrane bioreactor.
4. The membrane bioreactor-based phosphorus enrichment method of claim 1, wherein: under the anaerobic condition, a degradation carbon source is added for phosphorus-accumulating bacteria to absorb and convert into PHA, and the PHA provides energy for the phosphorus-accumulating bacteria to absorb phosphorus under the aerobic condition.
5. The membrane bioreactor-based phosphorus enrichment method of claim 1, wherein: and when the phosphorus concentration of the enrichment pool is more than 50mg/L, recovering phosphorus in the enrichment liquid by adopting a crystallization method.
6. The membrane bioreactor-based phosphorus enrichment method of claim 1, wherein: activated sludge from an oxidation ditch of a sewage treatment plant is adopted to culture phosphorus accumulating bacteria.
7. The membrane bioreactor-based phosphorus enrichment method of claim 1, wherein: and when the transmembrane pressure difference of the membrane bioreactor reaches 30kpa, performing physical and chemical cleaning on the membrane module.
8. A phosphorus enrichment system based on a membrane bioreactor is characterized in that: comprises a membrane bioreactor, a water inlet device, a phosphorus enrichment device and a control system; the control system is respectively electrically connected with the membrane bioreactor, the water inlet device and the phosphorus enrichment device; the membrane bioreactor cultures the phosphorus-accumulating bacteria, and the membrane bioreactor alternately operates under aerobic and anaerobic conditions under the control of the control system; the water inlet device pumps phosphorus-containing wastewater into the membrane bioreactor under an aerobic condition, and pumps phosphorus-rich concentrated solution into the enrichment pool into the membrane bioreactor under an anaerobic condition; the phosphorus enrichment device is used for monitoring the phosphorus concentration in the enrichment pool and recovering phosphorus after the phosphorus concentration reaches a threshold value.
9. The membrane bioreactor-based phosphorus enrichment system of claim 8, wherein: at least two groups of membrane bioreactors are arranged in parallel.
10. The membrane bioreactor-based phosphorus enrichment system of claim 8, wherein: the membrane module in the membrane bioreactor is a U-shaped hollow fiber membrane module or a flat membrane.
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| CN202110148193.5A CN113023887A (en) | 2021-02-03 | 2021-02-03 | Phosphorus enrichment method and system based on membrane bioreactor |
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| CN202110148193.5A CN113023887A (en) | 2021-02-03 | 2021-02-03 | Phosphorus enrichment method and system based on membrane bioreactor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3737030A1 (en) * | 1987-10-31 | 1989-05-11 | Schulze Oswald Kg | Process and appliance for the biological removal of phosphates from sewage |
| JP2008086864A (en) * | 2006-09-29 | 2008-04-17 | Ngk Insulators Ltd | Method for recovering phosphorus by using membrane separation activated sludge process |
| CN101654312A (en) * | 2009-07-17 | 2010-02-24 | 东华大学 | Device and method for continuously operation and reinforcement of biomembrane phosphate removing |
| CN107311308A (en) * | 2016-04-26 | 2017-11-03 | 苏州科技学院 | A kind of biomembrance process synchronously removes the technique with enriched phosphorus |
| CN109368946A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Sewage from Ships processing coupling recovery of nitrogen and phosphorus integral system and method |
| CN110668560A (en) * | 2019-10-28 | 2020-01-10 | 苏州科技大学 | Continuous biological nitrogen and phosphorus removal recovery system and process |
-
2021
- 2021-02-03 CN CN202110148193.5A patent/CN113023887A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| DE3737030A1 (en) * | 1987-10-31 | 1989-05-11 | Schulze Oswald Kg | Process and appliance for the biological removal of phosphates from sewage |
| JP2008086864A (en) * | 2006-09-29 | 2008-04-17 | Ngk Insulators Ltd | Method for recovering phosphorus by using membrane separation activated sludge process |
| CN101654312A (en) * | 2009-07-17 | 2010-02-24 | 东华大学 | Device and method for continuously operation and reinforcement of biomembrane phosphate removing |
| CN107311308A (en) * | 2016-04-26 | 2017-11-03 | 苏州科技学院 | A kind of biomembrance process synchronously removes the technique with enriched phosphorus |
| CN109368946A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Sewage from Ships processing coupling recovery of nitrogen and phosphorus integral system and method |
| CN110668560A (en) * | 2019-10-28 | 2020-01-10 | 苏州科技大学 | Continuous biological nitrogen and phosphorus removal recovery system and process |
Non-Patent Citations (4)
| Title |
|---|
| P.M.J.JANSEEN等: "《生物除磷设计与运行手册》", 31 October 2005, 中国建筑工业出版社 * |
| 上海城投污水处理有限公司: "《平板膜生物反应器法污水处理工程技术规范》", 30 April 2016, 同济大学出版社 * |
| 宋志伟等: "《水污染控制工程》", 31 May 2019, 中国矿业大学出版社 * |
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