CN113354106A - Sewage treatment system and method for denitrification nitrogen and phosphorus removal - Google Patents
Sewage treatment system and method for denitrification nitrogen and phosphorus removal Download PDFInfo
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- CN113354106A CN113354106A CN202110790001.0A CN202110790001A CN113354106A CN 113354106 A CN113354106 A CN 113354106A CN 202110790001 A CN202110790001 A CN 202110790001A CN 113354106 A CN113354106 A CN 113354106A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 53
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 48
- 239000011574 phosphorus Substances 0.000 title claims abstract description 48
- 239000010865 sewage Substances 0.000 title claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000012528 membrane Substances 0.000 claims abstract description 57
- 241000894006 Bacteria Species 0.000 claims abstract description 16
- UEKDBDAWIKHROY-UHFFFAOYSA-L bis(4-bromo-2,6-ditert-butylphenoxy)-methylalumane Chemical compound [Al+2]C.CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-].CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-] UEKDBDAWIKHROY-UHFFFAOYSA-L 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 239000010802 sludge Substances 0.000 claims abstract description 10
- 239000012510 hollow fiber Substances 0.000 claims abstract description 6
- 230000001276 controlling effect Effects 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 230000002572 peristaltic effect Effects 0.000 claims description 13
- 235000015097 nutrients Nutrition 0.000 claims description 10
- 238000005728 strengthening Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 5
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 230000000813 microbial effect Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 8
- 244000005700 microbiome Species 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229920001397 Poly-beta-hydroxybutyrate Polymers 0.000 description 2
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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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
- C02F3/34—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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a sewage treatment system and a sewage treatment method for denitrification nitrogen and phosphorus removal, which comprises an MABR device, an air compressor, a water inlet barrel and a circulating pump with a circulating regulating valve, wherein the MABR reactor based on coupling denitrification nitrogen and phosphorus removal is characterized in that air is continuously supplied to microorganisms growing on the surface of a hollow fiber membrane through the air compressor, aerobic, anoxic and anaerobic microenvironments are formed, and phosphorus-accumulating bacteria, denitrifying phosphorus-removing bacteria, denitrifying bacteria and the like are used for synergistic nitrogen and phosphorus removal, wherein the sewage treatment system for denitrification nitrogen and phosphorus removal is simple to operate, low in sludge yield and small in floor area, and the denitrifying and phosphorus-removing microorganisms are coupled in the MABR single-stage reactor by establishing a unique biomembrane growth environment, so that the traditional biological nitrogen and phosphorus removal process is simplified.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system and a sewage treatment method for denitrification nitrogen and phosphorus removal.
Background
At present, industrial and agricultural wastewater and municipal wastewater contain a large amount of nitrogen, phosphorus, organic matters and the like, the treatment cost is high, the quality of effluent is unstable, and the effluent is discharged into lakes and rivers, so that pathogenic microorganisms are easy to grow, water eutrophication is caused, water ecological balance is influenced, and the health and development of human beings are seriously threatened.
The traditional sewage treatment mostly adopts an A2/O process, but the process has high energy consumption and also has the following disadvantages: the low C/N characteristic of urban sewage in China is obvious, the denitrification effect is easily influenced under the condition of insufficient carbon source, so that the total nitrogen of effluent is not up to the standard, and nitrate which is not subjected to denitrification flows back to the anaerobic tank to interfere the normal operation of the anaerobic phosphorus release activity of phosphorus accumulating bacteria; the operation is complicated, for example, a sedimentation tank of the A2/O process needs to maintain certain dissolved oxygen, the sludge is easy to release phosphorus again in an anaerobic manner due to too low oxygen content, and the denitrification effect of the anoxic tank is easy to be influenced by the sludge backflow due to too high oxygen content; the occupied area is large, and the sludge treatment cost of the aerator is high; the temperature is easy to influence, and the effluent quality is seriously influenced especially in winter; the problems of the traditional water treatment process and the increasingly strict discharge standard of water treatment make the research of the novel efficient nitrogen and phosphorus removal process more urgent, so that a sewage treatment system and a sewage treatment method for denitrification nitrogen and phosphorus removal are urgently needed to solve the problems.
Disclosure of Invention
The invention provides a sewage treatment system and a sewage treatment method for denitrification and dephosphorization, which are simple to operate, low in sludge yield, small in occupied area and capable of simplifying the traditional biological denitrification and dephosphorization process.
In order to achieve the purpose, the invention provides the following technical scheme: a sewage treatment system for denitrification and dephosphorization comprises:
the MABR device comprises a container with a water inlet and a water outlet, and a membrane module which is arranged in the container and mainly consists of a plurality of membrane filaments, wherein one end of the membrane module extends out of the container and is communicated with the air outlet end of the air compressor, and the other end of the membrane module extends out of the container and is provided with an air outlet regulating valve;
the water outlet of the water inlet barrel is connected with a peristaltic pump and is connected with the water inlet of the container through the peristaltic pump, and the peristaltic pump controls the water inlet barrel to convey water to the container;
and the circulating pump with a circulating regulating valve is communicated with the container and used for controlling the water source in the container to circularly flow.
Preferably, the water inlet is arranged at a position of the container close to the bottom end, and the water inlet is arranged at a position of the container close to the top end.
Preferably, the membrane module further comprises two sealing heads respectively installed at two ends of the membrane wires, two ends of the membrane wires are tied, an air outlet end of the air compressor is communicated with the sealing head at one end of the membrane module through a first air pipe, an air inlet adjusting valve is installed on the first air pipe, the sealing head at the other end is connected with a second air pipe, and the air outlet adjusting valve is installed on the second air pipe to control the conduction or the closing of the second air pipe.
Preferably, the membrane filaments are hollow fiber membranes.
Preferably, at least one set of membrane modules is installed in the vessel.
A treatment method of a sewage treatment system based on denitrification nitrogen and phosphorus removal comprises the following steps:
s1, film forming: placing an aeration tank or activated sludge of a municipal sewage treatment plant in a container of an MABR device, adjusting the air inlet pressure to be 0.0015-0.01MPa by an air compressor, controlling the dissolved oxygen in the MABR device to be 0.3-0.85mg/L, starting a circulating pump, immersing membrane wires in inlet water, adding nutrient solution regularly every day, operating for 3-5 weeks, and loading a biological membrane on the outer surfaces of the membrane wires;
s2, domestication and enrichment: starting a peristaltic pump, controlling a water inlet barrel to continuously convey a water source to the container, controlling the flow to be 0.37-0.38L/h and the pH of inlet water to be 7.0-8.0, adjusting an air compressor, controlling the dissolved oxygen in the container to be 0.4-0.6mg/L, and forming an aerobic layer, an anoxic layer and an anaerobic layer on the outer surface of the membrane wire;
s3, strengthening: adjusting the air inlet adjusting valve of the air compressor and the first air pipe, controlling the air inlet pressure to be 0.0015-0.005MPa, promoting the thickness of the aerobic layer of the membrane wire in the reactor to be narrowed, improving the concentration of the water inlet substrate, and strengthening the growth and the propagation of denitrifying phosphorus accumulating bacteria in the anaerobic layer.
Preferably, the height-diameter ratio of the container is 5:1-10: 1.
Preferably, in step S1, the nutrient solution includes organic matter 200mg/L, total phosphorus 20mg/L, and nitrate nitrogen 30mg/L, wherein the nutrient solution has the same solubility with the water to be treated.
Preferably, in step S3, the substrate concentration is increased or the hydraulic retention time is decreased to increase the microbial treatment load and enhance the function, thereby realizing simultaneous denitrification and dephosphorization.
Compared with the prior art, the invention has the beneficial effects that: the MABR based on coupling denitrification nitrogen and phosphorus removal has the advantages that air continuously permeates through the hollow fiber membrane through the air compressor to supply microorganisms growing on the surface of the membrane, aerobic, anoxic and anaerobic micro-environments are formed, and phosphorus removal is achieved through synergy of phosphorus accumulating bacteria, denitrification phosphorus removal bacteria, denitrifying bacteria and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural diagram of a denitrification dephosphorization sewage treatment system according to the invention;
reference numbers in the figures: 1. a container; 2. membrane silk; 3. sealing the end; 4. an air compressor; 5. a first air pipe; 6. an air inlet regulating valve; 7. a second air pipe; 8. an air outlet regulating valve; 9. a water inlet barrel; 10. a peristaltic pump; 11. a circulation pump; 12. a water pipe; 13. a circulation regulating valve; 14. a water inlet; 15. and (7) a water outlet.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The biological phosphorus removal mainly comprises the aerobic phosphorus absorption process of phosphorus-accumulating bacteria by using oxygen as an electron acceptor under the condition of high dissolved oxygen; under the condition of low dissolved oxygen, denitrifying phosphorus removal bacteria carry out biological phosphorus removal by using NO 3-N or NO 2-N as an electron acceptor, namely denitrifying phosphorus removal; in addition, uptake of phosphorus resources required for growth of the microorganism itself is also included. The denitrifying phosphorus removal bacteria can be used for one-nitrogen dual-purpose, namely poly-beta-hydroxybutyrate (PHB) stored in a human body is used for denitrifying nitrogen removal, and a large amount of phosphorus sources are enriched, so that the denitrifying phosphorus removal bacteria are dominant functional bacteria for removing nitrogen and phosphorus under the condition of low carbon sources.
As shown in FIG. 1, a denitrification dephosphorization sewage treatment system comprises: the MABR device comprises a container with a water inlet and a water outlet, and a membrane module which is arranged in the container and mainly comprises a plurality of membrane wires, wherein one end of the membrane module extends out of the container and is communicated with the air outlet end of the air compressor, and the other end of the membrane module extends out of the container and is provided with an air outlet regulating valve; the water outlet of the water inlet barrel is connected with a peristaltic pump and is connected with the water inlet of the container through the peristaltic pump, and the peristaltic pump is used for controlling the water inlet barrel to convey water to the container; the circulating pump with a circulating regulating valve is communicated with the container to control the water source in the container to circularly flow.
Referring to fig. 1, the water inlet is disposed at a position close to the bottom end of the container, the water inlet is disposed at a position close to the top end of the container, each membrane wire is bent and suspended in the container, the membrane module further comprises two seal heads respectively disposed at two ends of the membrane wire, two ends of the membrane wires are connected by a plurality of openings, an air outlet end of the air compressor is communicated with the seal head at one end of the membrane module through a first air pipe, an air inlet regulating valve is mounted on the first air pipe, the seal head at the other end of the air compressor is connected with a second air pipe, the air outlet regulating valve is mounted on the second air pipe to control the conduction or the closing of the second air pipe, an inlet and an outlet of the circulating pump are communicated with the container through water pipes, and a circulation regulating valve is mounted on one water pipe, wherein the membrane wires are hollow fiber membranes, and at least one group of membrane modules is mounted in the container.
A treatment method of a denitrification nitrogen and phosphorus removal sewage treatment system comprises the following steps:
s1, film forming: placing an aeration tank or activated sludge of a municipal sewage treatment plant into a container of an MABR device, adjusting the air inlet pressure to be 0.0015-0.01MPa by an air compressor, closing an air outlet adjusting valve, controlling the dissolved oxygen in the MABR device to be 0.3-0.85mg/L, starting a circulating pump, immersing membrane wires in inlet water, adding nutrient solution regularly every day, operating for 3-5 weeks, and loading a biological membrane on the outer surfaces of the membrane wires;
s2, domestication and enrichment: starting a peristaltic pump, controlling a water inlet bucket to continuously convey a water source to a container, controlling the flow rate to be 0.37-0.38L/h and the pH value of inlet water to be 7.0-8.0, adjusting an air compressor, controlling the dissolved oxygen in the container to be 0.4-0.6mg/L and the hydraulic retention time to be 2-3d, forming an aerobic layer, an anoxic layer and an anaerobic layer on the outer surface of a membrane wire, and promoting denitrifying phosphorus removal functional bacteria to be enriched quickly by unique spatial distribution rules and heterogeneous mass transfer phenomena;
s3, strengthening: adjusting air inlet adjusting valves of an air compressor and a first air pipe, controlling the air inlet pressure to be 0.0015-0.005MPa, promoting the thickness of a membrane wire aerobic layer in the reactor to be narrowed, improving the concentration of a water inlet substrate, strengthening the growth and the propagation of denitrifying phosphorus-accumulating bacteria on an anaerobic layer, and operating the reaction system when the denitrifying phosphorus-removing efficiency is more than 80% after strengthening.
Wherein the height-diameter ratio of the container is 5:1-10:1, and in step S1, the nutrient solution comprises 200mg/L of organic matter, 20mg/L of total phosphorus and 30mg/L of nitrate nitrogen; wherein, the solubility of the nutrient solution is consistent with that of the water to be treated; and by increasing the substrate concentration or reducing the hydraulic retention time, the microbial treatment load is increased, the function is enhanced, and the synchronous denitrification nitrogen and phosphorus removal is realized.
Wherein the nitrogen source can be provided by nitrate nitrogen, the phosphorus source can be provided by potassium dihydrogen phosphate, and the carbon source can be provided by sodium acetate.
Example 1: putting 150 hollow fiber membrane modules with the length of 1.6m into a container, closing an air outlet adjusting valve, and opening a circulating pump and an air compressor; the method comprises the steps of putting activated sludge of a municipal sewage treatment plant into a container of an MABR device, submerging membrane filaments, and providing nutrients for the activated sludge in a mode of periodically adding 30-50mg/L of nitrate, 10-50mg/L of phosphorus source and 150-300mg/L of carbon source for 30 days to load microorganisms on the surfaces of the membrane filaments; then adjusting the effluent to continuous flow water inflow according to the method, performing domestication and enrichment, wherein monitoring is performed through an ORP, pH and dissolved oxygen probe from an opening above a container, the ORP is-40 to-1 mV, the load is increased, the function is strengthened, the effluent quality is obtained by effluent quality detection of a water outlet, and the result is that the total nitrogen removal rate is 99.8%, the organic matter removal rate is 93.6% and the total phosphorus removal rate is 86.5%.
Example 2: placing two groups of the membrane modules in a container; the treatment according to the steps lasts for three weeks, the continuous flow water inflow is adjusted, the load is increased, the hydraulic retention time is increased to 2.6d, and the result is that the total nitrogen removal rate is 100%, the organic matter removal rate is 91.4%, the total phosphorus removal rate is 80.1%, and the time for starting phosphorus removal is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a sewage treatment system of denitrification nitrogen and phosphorus removal which characterized in that includes:
the MABR device comprises a container with a water inlet and a water outlet, and a membrane module which is arranged in the container and mainly consists of a plurality of membrane filaments, wherein one end of the membrane module extends out of the container and is communicated with the air outlet end of the air compressor, and the other end of the membrane module extends out of the container and is provided with an air outlet regulating valve;
the water outlet of the water inlet barrel is connected with a peristaltic pump and is connected with the water inlet of the container through the peristaltic pump, and the peristaltic pump controls the water inlet barrel to convey water to the container;
and the circulating pump with a circulating regulating valve is communicated with the container and used for controlling the water source in the container to circularly flow.
2. The sewage treatment system for denitrification and dephosphorization of claim 1, wherein: the water inlet is arranged at the position, close to the bottom end, of the container, and the water inlet is arranged at the position, close to the top end, of the container.
3. The sewage treatment system for denitrification and dephosphorization of claim 1, wherein: the membrane component also comprises two seal heads which are respectively arranged at two ends of the membrane wires, two ends of the membrane wires are connected with the openings, the air outlet end of the air compressor is communicated with the seal head at one end of the membrane component through a first air pipe, an air inlet adjusting valve is arranged on the first air pipe, the seal head at the other end is connected with a second air pipe, and the air outlet adjusting valve is arranged on the second air pipe to control the conduction or the closing of the second air pipe.
4. The sewage treatment system for denitrification and dephosphorization of claim 3, wherein: the membrane filaments are hollow fiber membranes.
5. The sewage treatment system for denitrification and dephosphorization of claim 4, wherein: at least one group of membrane modules is arranged in the container.
6. A treatment method of the sewage treatment system based on denitrification nitrogen and phosphorus removal of any one of claims 1-5 is characterized in that: the method comprises the following steps:
s1, film forming: placing an aeration tank or activated sludge of a municipal sewage treatment plant in a container of an MABR device, adjusting the air inlet pressure to be 0.0015-0.01MPa by an air compressor, controlling the dissolved oxygen in the MABR device to be 0.3-0.85mg/L, starting a circulating pump, immersing membrane wires in inlet water, adding nutrient solution regularly every day, operating for 3-5 weeks, and loading a biological membrane on the outer surfaces of the membrane wires;
s2, domestication and enrichment: starting a peristaltic pump, controlling a water inlet barrel to continuously convey a water source to the container, controlling the flow to be 0.37-0.38L/h and the pH of inlet water to be 7.0-8.0, adjusting an air compressor, controlling the dissolved oxygen in the container to be 0.4-0.6mg/L, and forming an aerobic layer, an anoxic layer and an anaerobic layer on the outer surface of the membrane wire;
s3, strengthening: adjusting the air inlet adjusting valve of the air compressor and the first air pipe, controlling the air inlet pressure to be 0.0015-0.005MPa, promoting the thickness of the aerobic layer of the membrane wire in the reactor to be narrowed, improving the concentration of the water inlet substrate, and strengthening the growth and the propagation of denitrifying phosphorus accumulating bacteria in the anaerobic layer.
7. The treatment method of the sewage treatment system for denitrification, nitrogen and phosphorus removal according to claim 6, characterized in that: the height-diameter ratio of the container is 5:1-10: 1.
8. The treatment method of the sewage treatment system for denitrification, nitrogen and phosphorus removal according to claim 7, characterized in that: in step S1, the nutrient solution includes organic matter 200mg/L, total phosphorus 20mg/L, nitrate nitrogen 30mg/L, wherein the nutrient solution has the same solubility with the water to be treated.
9. The treatment method of the sewage treatment system for denitrification, nitrogen and phosphorus removal according to claim 6, characterized in that: in step S3, the substrate concentration is increased or the hydraulic retention time is decreased to increase the microbial treatment load and enhance the function, thereby achieving simultaneous denitrification and phosphorus removal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845224A (en) * | 2021-11-01 | 2021-12-28 | 南开大学 | Process method suitable for treating sewage with low carbon-nitrogen ratio |
| CN115784431A (en) * | 2022-12-07 | 2023-03-14 | 哈尔滨工业大学 | Membrane for supplying CO for maintaining carbon-oxygen balance of optical biological membrane system 2 Sewage treatment method and device |
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| CN112320940A (en) * | 2020-10-21 | 2021-02-05 | 西安建筑科技大学 | N production by enrichment of membrane contactor2Device and method for O denitrifying bacteria |
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| JP2010284617A (en) * | 2009-06-15 | 2010-12-24 | Eidensha:Kk | Bioreactor element, method for producing the same and method for using the same |
| CN112320940A (en) * | 2020-10-21 | 2021-02-05 | 西安建筑科技大学 | N production by enrichment of membrane contactor2Device and method for O denitrifying bacteria |
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| CN113845224A (en) * | 2021-11-01 | 2021-12-28 | 南开大学 | Process method suitable for treating sewage with low carbon-nitrogen ratio |
| CN115784431A (en) * | 2022-12-07 | 2023-03-14 | 哈尔滨工业大学 | Membrane for supplying CO for maintaining carbon-oxygen balance of optical biological membrane system 2 Sewage treatment method and device |
| CN115784431B (en) * | 2022-12-07 | 2023-07-14 | 哈尔滨工业大学 | Membrane CO for maintaining carbon-oxygen balance of photobiological membrane system 2 Sewage treatment method and device |
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