CN113772890B - Sewage treatment system and treatment method based on AO-MBBR-inductively coupled filter tank - Google Patents
Sewage treatment system and treatment method based on AO-MBBR-inductively coupled filter tank Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 33
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- 238000005273 aeration Methods 0.000 claims abstract description 75
- 238000004062 sedimentation Methods 0.000 claims abstract description 60
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 50
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 32
- 239000011574 phosphorus Substances 0.000 claims abstract description 32
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011159 matrix material Substances 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 99
- 229910001868 water Inorganic materials 0.000 claims description 99
- 239000003344 environmental pollutant Substances 0.000 claims description 37
- 231100000719 pollutant Toxicity 0.000 claims description 37
- 239000006228 supernatant Substances 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 30
- 230000009471 action Effects 0.000 claims description 26
- 239000010802 sludge Substances 0.000 claims description 24
- 244000005700 microbiome Species 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 21
- 238000005868 electrolysis reaction Methods 0.000 claims description 17
- 239000006004 Quartz sand Substances 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
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- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
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- 230000000694 effects Effects 0.000 description 17
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- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000012010 growth Effects 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 3
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- 238000011010 flushing procedure Methods 0.000 description 3
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- 229910052602 gypsum Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 206010021143 Hypoxia Diseases 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
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001453382 Nitrosomonadales Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
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- 230000016615 flocculation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
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- 239000002351 wastewater Substances 0.000 description 1
- ATYZRBBOXUWECY-UHFFFAOYSA-N zirconium;hydrate Chemical compound O.[Zr] ATYZRBBOXUWECY-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Abstract
The invention discloses a sewage treatment system and a treatment method based on an AO-MBBR-inductively coupled filter tank, wherein the treatment system comprises an anoxic tank, an aerobic tank, a sedimentation tank, a constant-voltage direct-current power supply and a primary or multistage inductively coupled filter tank; the bottom of the anoxic tank is communicated with the bottom of the aerobic tank, the top side wall of the aerobic tank is communicated with the sedimentation tank, the top side wall of the sedimentation tank is communicated with the inductive coupling filter tank, an electrode matrix is arranged in the inductive coupling filter tank, the constant-voltage direct-current power supply is electrically connected with the electrode matrix, a second aeration branch pipeline is arranged at the bottom of the inductive coupling filter tank, a perforated baffle is horizontally arranged in the inductive coupling filter tank close to the upper part of the second aeration branch pipeline, and an aeration main pipe which is mutually communicated is arranged between the inductive coupling filter tank and the anoxic tank and the aerobic tank. The invention combines AO, MBBR and inductively coupled filter technology to remove nitrogen, phosphorus and organic matters in domestic sewage at the same time and efficiently, and finally the effluent can reach standard discharge.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment system and a sewage treatment method based on an AO-MBBR-inductively coupled filter tank.
Background
The method is characterized in that the sewage discharge of villages and towns has the characteristics of small sewage quantity, large water quality and water quantity change, obvious intermittent discharge, relatively simple sewage components and the like according to living habits of residents in rural areas of China. However, due to reasons of unplanned village and town layout, insufficient investment of government funds and the like, the treatment of sewage in rural areas in China lacks corresponding facility equipment, so that most of domestic sewage is directly discharged without treatment. The random discharged rural domestic sewage not only pollutes the underground water, but also causes eutrophication of nitrogen and phosphorus in lakes and even causes black and odorous water bodies to cause serious threat to the ecological environment, and if the existing process is adopted for treatment, the problems of complex process, large occupied area, high cost, complex management and maintenance and the like exist. At present, a distributed rural sewage treatment system has been widely popularized and applied in engineering, and the common processes of the distributed system in treating rural sewage comprise AO and A 2 O, MBR, MBBR, etc., the running and effluent quality is relatively stable, and some areas with relatively developed economy or special water function areas require the treated rural sewage quality to meet higher requirements, especially the control of nitrogen and phosphorus, while the common process of a distributed system is that of high nitrogen in the inflow waterWhen the phosphorus is high, the nitrogen and phosphorus removal rate is limited by a biological method, the phosphorus removal rate can only reach 35 to 60 percent generally, and the higher emission requirement is hardly reached. For this reason, the fundamental purpose of rural domestic sewage treatment is to protect the water environment, and the most main pollutants aimed at are nitrogen and phosphorus and organic pollutants. Therefore, how to design a simple process and device to simultaneously remove nitrogen, phosphorus and organic matters, meet the emission requirements, and stably operate for a long time is a prominent problem in the current environmental protection field.
Disclosure of Invention
The invention aims to provide a sewage treatment system and a sewage treatment method based on an AO-MBBR-inductively coupled filter tank. In order to achieve the above purpose, the present invention adopts the following technical scheme:
according to one aspect of the invention, there is provided a sewage treatment system based on an AO-MBBR-inductively coupled filter tank, the sewage treatment system comprising an anoxic tank, an aerobic tank, a sedimentation tank, a constant voltage direct current power supply and a one-stage or multistage inductively coupled filter tank; the bottom of oxygen deficiency pond and the bottom intercommunication each other of good oxygen pond, the top lateral wall and the sedimentation tank intercommunication of good oxygen pond, the top lateral wall of sedimentation tank with inductive coupling filtering pond intercommunication has laid electrode matrix in inductive coupling filtering pond, constant voltage direct current power supply and electrode matrix electrical connection are equipped with the second aeration branch pipe in the bottom of inductive coupling filtering pond, are provided with the perforation baffle in the inductive coupling filtering pond level that is close second aeration branch pipe top, be provided with the aeration main pipe of mutual intercommunication between inductive coupling filtering pond and oxygen deficiency pond and good oxygen pond (2).
Above-mentioned scheme is preferred the bottom in the anoxic tank and the bottom in the aerobic tank are provided with first aeration branch pipe respectively, evenly distributed has the aeration disc on first aeration branch pipe, in the anoxic tank and the first aeration branch pipe in the aerobic tank respectively through first air guide branch pipe with the aeration is responsible for the intercommunication, be provided with the air-blower on the aeration is responsible for, in anoxic tank and the aerobic tank and be located first aeration branch pipe and be provided with combination filler and MBBR fast branch filler respectively, be provided with first air check valve on the first air guide branch pipe, the top lateral wall of aerobic tank is provided with the water hole, be provided with the L shape conveyer pipe with water hole intercommunication in the sedimentation tank, the upper end of this L shape conveyer pipe is connected in the play water one side of water hole, the other end downwardly extending of L shape conveyer pipe is close to the bottom top of sedimentation tank, is provided with the triangle weir on the top lateral wall of sedimentation tank on the opposite side of water hole, the top lateral wall of sedimentation tank is through triangle weir with the top lateral wall intercommunication of inductance coupling of filter.
Above-mentioned scheme is preferred, the inductive coupling filtering pond includes the one-level inductive coupling filtering pond and the second inductive coupling filtering pond of constituteing by the two-stage filtering pond, is provided with out the basin on the top lateral wall of the second inductive coupling filtering pond of keeping away from one-level inductive coupling filtering pond one side, the top lateral wall of sedimentation tank pass through the triangle weir delivery port with the top lateral wall intercommunication of one-level inductive coupling filtering pond, the bottom of one-level inductive coupling filtering pond and the bottom intercommunication of second inductive coupling filtering pond each other, the perforation baffle level runs through the setting on the bottom top of one-level inductive coupling filtering pond and the top of second inductive coupling filtering pond, one end of perforation baffle is connected on the one-level inductive coupling filtering pond lateral wall of triangle weir delivery port one side, the other end of perforation baffle is connected on the second inductive coupling filtering pond lateral wall of one side, the second aeration branch pipeline level sets up in the bottom of one-level inductive coupling filtering pond below the perforation baffle and the bottom of second inductive coupling filtering pond, is provided with by the top of one-level inductive coupling filtering pond downwardly stretched into to the bottom and with the second air-guide branch pipe and the second inductive coupling filtering pond intercommunication in one-level inductive coupling delivery port one-level water outlet and second inductive coupling filtering pond water outlet and second air guide valve are arranged in the second filtering pond and is provided with the check air check valve respectively.
In the above scheme, preferably, the electrode matrix is an electrode array formed by spacing columnar electrodes.
In the scheme, preferably, porous dephosphorization filler with the particle size of 10mm-30mm is paved in the primary inductive coupling filter tank and the secondary inductive coupling filter tank and between the level of the triangular weir water outlet and the surface of the perforated baffle plate.
According to the scheme, preferably, pebbles with the particle size of 2-10 mm are paved in the primary inductive coupling filter tank and paved on the porous dephosphorization filler, and quartz sand with the particle size of 0.8-1.5 mm is paved in the secondary inductive coupling filter tank and paved on the porous dephosphorization filler.
In the above scheme, preferably, a sewage outlet and a submerged sludge reflux pump are arranged near the bottom of the sedimentation tank, and the output end of the submerged sludge reflux pump is communicated with the bottom of the anoxic tank through a reflux pipe.
According to another aspect of the invention, the invention provides a sewage treatment method based on an AO-MBBR-inductively coupled filter tank, which comprises the following steps: the domestic sewage is treated by a grating and then sequentially sent into an anoxic tank and an aerobic tank for treatment by microorganisms; the domestic sewage treated by the microorganisms enters a sedimentation tank to carry out sludge sedimentation, so that the separation of water and sludge is realized, and the sludge flows back into an anoxic tank to further remove suspended matters in the water; supernatant fluid formed after domestic sewage is precipitated in a sedimentation tank enters an inductive coupling filter through a triangular weir water outlet, and under the action of voltage applied to an electrode matrix by a constant-voltage direct-current power supply to carry out micro-electrolysis and aeration of a second aeration branch pipeline, the supernatant fluid firstly passes through pebbles and porous dephosphorization filler from top to bottom to adsorb pollutants in the inductive coupling filter, and under the action of micro-electrolysis carried out on the electrode matrix, part of organic matters, nitrogen and phosphorus are firstly removed, and then the supernatant fluid is subjected to micro-electrolysis, porous dephosphorization filler and quartz sand from bottom to top to adsorb the pollutants again through the electrode matrix, so that the organic matters, nitrogen and phosphorus in the supernatant fluid sewage are further removed.
The scheme is further preferable that the domestic sewage is sent to an anoxic tank and an aerobic tank for microbial treatment through grid treatment, and the method comprises the following steps that after the domestic sewage is sent to the anoxic tank through grid treatment, combined filler and MBBR rapid separation filler are respectively added in the anoxic tank and the aerobic tank, and denitrifying bacteria are fixed on the MBBR rapid separation filler in the anoxic tank, so that the domestic sewage is subjected to short-range anaerobic denitrification reaction in the anoxic tank; the domestic sewage after anaerobic denitrification reaction enters an aerobic tank from the side wall of the lower end of the anoxic tank, and a first aeration branch pipeline is arranged at the bottom of the aerobic tank to maintain MBBR rapid separation packing in the aerobic tank in a fluidization state; the aeration flow generated by the first aeration branch pipeline is fully contacted with domestic sewage, combined filler and MBBR rapid separation filler, a biological film is formed on the surfaces of the combined filler and the MBBR rapid separation filler and the inside thereof, a dissolved oxygen gradient is gradually formed from the surfaces of the combined filler and the MBBR rapid separation filler to the inside, pollutants are promoted to perform a downward oxidation reaction in an aerobic tank, an aerobic zone is formed on the surfaces of the combined filler, the surfaces of the MBBR rapid separation filler and the surfaces of the biological film, and an anoxic zone or an anaerobic zone is formed inside the aerobic zone, so that the nitrification reaction of the pollutants in the domestic sewage is realized.
The scheme is further preferable that the domestic sewage after microbial treatment enters a sedimentation tank to carry out sludge sedimentation, and the separation of water and sludge is realized, and the method comprises the following treatment steps that the domestic sewage enters the sedimentation tank to carry out sludge-water separation, so that supernatant sewage is formed at the upper part in the sedimentation tank, the supernatant sewage automatically flows into a primary inductive coupling filter tank and a secondary inductive coupling filter tank of the inductive coupling filter tank after being deposited through a triangular weir water outlet, and part of muddy water mixed liquor in the sedimentation tank flows back to an anoxic tank for denitrification through a sludge reflux pump and a reflux pipe, and the other part of muddy water mixed liquor is discharged through a sewage outlet; after entering the primary inductive coupling filter tank through the triangular weir water outlet, the supernatant fluid firstly passes through pebbles with larger particle sizes from top to bottom in the primary inductive coupling filter tank, then passes through porous dephosphorization filler with smaller particle sizes, and forms three-dimensional electrolysis under the action of an external electric field of an electrode matrix and absorbs and removes organic matters, nitrogen and phosphorus pollutants in the supernatant fluid sewage under the action of aeration through a second aeration branch pipeline; the supernatant sewage treated by the primary inductive coupling filter tank enters the secondary inductive coupling filter tank from the bottom, flows from bottom to top in the secondary inductive coupling filter tank, sequentially passes through the porous dephosphorization filler and the quartz sand, and forms three-dimensional electrolysis under the action of an external electric field of the electrode matrix, so that residual pollutants in the supernatant sewage fully contact with the porous dephosphorization filler and the quartz sand, and the pollutants in the supernatant sewage are adsorbed and micro-electrolyzed, so that organic matters, nitrogen and phosphorus pollutants in the supernatant sewage are deeply removed.
In summary, the invention adopts the technical scheme, and has the following technical effects:
(1) The electrode matrix of the invention generates oxidation-reduction effect so that various indexes of the water are superior to those of a common aeration biological filter, under the action of an external power supply, substances with stronger oxidability and reducibility are generated on the electrodes in the coupling filter, the substances remove pollutants in the water through oxidation-reduction effect, the pollutants in the water can be better degraded through direct oxidation and indirect oxidation effect, and meanwhile, oxygen and hydrogen generated by micro-electrolysis have promotion effect on the cell growth and activity of microorganisms.
(2) The aeration pipe is arranged at the bottom of the anoxic tank to prevent the filler from losing the adsorption effect due to excessive adhesion of microorganisms, and the aeration mode can be intermittently started to back flush the filler in the anoxic tank so as to maintain the optimal adsorption performance of the filler.
(3) The bottom of the inductive coupling filter tank is provided with a perforated baffle, the aperture is 10-20mm, and an aeration branch pipeline is arranged below the perforated baffle.
(4) The invention adopts a modularized design, and occupies smaller area; the operation is stable, the operation and maintenance management is simple and convenient, the energy consumption is low, and the operation cost is low; the system can automatically run without special management; the method has the advantages of wide application range, suitability for on-site treatment and recycling of water quality such as relatively dispersed rural domestic sewage, tourist attraction sewage, landscape water, lake water and the like with small water quantity and relatively large water quality and water quantity change, simple and convenient process treatment, long-term stable operation while meeting emission requirements, effective solution of rural sewage treatment problems in China, and good application prospect.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment system based on AO-MBBR-inductive coupling according to the present invention;
1-anoxic tank, 2-aerobic tank, 3-sedimentation tank, 4-first aeration branch pipe, 4 a-first air guide branch pipe, 4 b-first air check valve, 5-blower, 6-submerged sludge reflux pump, 7-combined filler, 8-porous dephosphorization filler, 9-MBBR filler, 10-primary inductive coupling filter, 11-secondary inductive coupling filter, 12-triangular weir water outlet, 12 a-water outlet tank, 13-second aeration branch pipe, 13 a-second air guide branch pipe, 14-perforated baffle plate, 15-aeration main pipe, 16-second air check valve, 17-drain outlet, 18-electrode matrix, 19-constant voltage direct current power supply, 20-quartz sand, 21-pebble, 30-water passing hole, 31-L-shaped conveying pipe, 40-aeration disc and 60-reflux pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and by illustrating preferred embodiments. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the invention, and that these aspects of the invention may be practiced without these specific details.
As shown in fig. 1, the sewage treatment system based on the AO-MBBR-inductively coupled filter provided by the invention comprises an anoxic tank 1, an aerobic tank 2, a sedimentation tank 3, a constant-voltage direct-current power supply 19 and one-stage or multi-stage inductively coupled filter; the bottom of the anoxic tank 1 is communicated with the bottom of the aerobic tank 2, the top side wall of the aerobic tank 2 is communicated with the sedimentation tank 3, the top side wall of the sedimentation tank 3 is communicated with the inductive coupling filter tank, an electrode matrix 18 is arranged in the inductive coupling filter tank, the constant voltage direct current power supply 19 is electrically connected with the electrode matrix, a second aeration branch pipe 13 is arranged at the bottom of the inductive coupling filter tank, a perforated baffle 14 is horizontally arranged in the inductive coupling filter tank close to the upper part of the second aeration branch pipe 13, and an aeration main pipe 15 which is mutually communicated is arranged between the inductive coupling filter tank and the anoxic tank 1 and the aerobic tank 2; the bottom in the anoxic tank 1 and the bottom in the aerobic tank 2 are respectively provided with a first aeration branch pipe 4, aeration discs 40 are uniformly distributed on the first aeration branch pipe 4, the first aeration branch pipe 4 in the anoxic tank 1 and the aerobic tank 2 are respectively communicated with the aeration main pipe 15 through a first gas-guide branch pipe 4a, the aeration main pipe 15 is provided with a blower 5, the first gas-guide branch pipe 4a is provided with a first air check valve 4b, the aeration pipe of the anoxic tank 1 is subjected to aeration and back flushing through the first gas-guide branch pipe 4a, the back flushing effect of the filler can be achieved during the aeration, the volume of the anoxic tank 1 is smaller than that of the aerobic tank 2, the volume ratio of the anoxic tank 1 to the aerobic tank 2 is 1:2-1:4, the volume ratio is preferably 1:3, the aeration main pipe 15 is used for carrying out long-time aeration on the aerobic tank 2 through the first gas-guide branch pipe 4a, the anoxic main pipe 15 is respectively provided with a combined sludge 7 and a back flushing pump 9 which are respectively arranged in the anoxic tank 1 and the aerobic tank 2 and above the first branch pipe 4, the anoxic tank 1 and a sludge return pump 60 is arranged near the bottom of the sewage pump 6 of the anoxic tank 1 and the sewage pump 6 which is communicated with the bottom of the reflux pump 6; the combined filler 7 consists of aldehyde fiber, has large specific surface area, no blockage and rapid film formation, mainly provides a carrier for microorganisms, and has the structure that a plastic wafer is pressed and buckled into a double-ring large plastic ring, and the aldehyde fiber or polyester yarn is pressed on the ring of the ring to uniformly distribute fiber bundles; the inner ring is snowflake-shaped plastic branches, so that the combined filler can not only hang films, but also effectively cut bubbles, the transfer rate and the utilization rate of oxygen are improved, the water-gas biomembrane is fully exchanged, and organic matters in water are efficiently treated, as the sewage is subjected to the treatment of an anoxic tank 1 and an aerobic tank 2, microorganisms can propagate, and the microorganisms have explanation effects on pollutants in the sewage, the combined filler 7 has a certain adsorption effect on the pollutants in domestic sewage, and the microorganisms growing on the surface of the combined filler 7 hang films have biodegradation effects on the organic matters, so that the BOD and COD removal rate in the water can reach more than 60-70%; sewage sequentially enters the anoxic tank 1 and the aerobic tank 2 to be contacted with the MBBR rapid separation packing 9; the combined filler 7 and the MBBR rapid separation filler 9 in the anoxic tank 1 are used for reducing partial ammonia nitrogen in raw water and nitrite and nitrate in reflux liquid in the sedimentation tank 2 into nitrogen under the combined action of short-range denitrifying bacteria, anammox bacteria and the like, microbial flora rapidly grows and breeds in the anoxic tank 1 and activated sludge, pollutants in sewage are trapped and adsorbed by biological films and the activated sludge and are used as nutrient sources of microorganisms, and the sewage is digested in the growth and breeding process, so that the sewage is primarily degraded; then sewage flows into the aerobic tank 2 through the bottom side wall of the anoxic tank 1 for purification and repair, an aeration main pipe 15 is needed to carry out long-time aeration on the aerobic tank 2 through a first air guide branch pipe 4a and a first air check valve 4b, a suspended microorganism carrier is in a fluidized state and flows in the disordered state in the aerobic tank 2 during aeration, the fluidized state of an MBBR rapid separation filler 9 is maintained, the sewage is contacted with the active microorganism carrier (the MBBR rapid separation filler) in the aeration flow, ammonia nitrogen in the water of the aerobic tank 1 is oxidized into nitrite under the action of microorganisms, meanwhile, a dissolved oxygen gradient is gradually formed from the surface to the inside of a biological film formed on the surfaces of the combined filler 7 and the MBBR rapid separation filler 9, and an aerobic zone is formed on the surfaces of the filler and the biological film, and an anoxic zone or an anaerobic zone is formed inside the filler, and therefore, the aerobic tank can realize synchronous nitrification and denitrification in the same biological film system, and high-efficiency denitrification can be realized; the phosphorus accumulating bacteria can absorb excessive phosphorus in water to enter bacteria under aerobic condition to reach the effect of eliminating phosphorus.
In the invention, as shown in fig. 1, a water passing hole 30 is arranged on the top side wall of the aerobic tank 2, an L-shaped conveying pipe 31 communicated with the water passing hole 30 is arranged in the sedimentation tank 3, the upper end of the conveying pipe 31 is connected to the water outlet side of the water passing hole 30, the other end of the L-shaped conveying pipe 31 extends downwards to be close to the upper part of the bottom of the sedimentation tank 3, domestic sewage flows into the sedimentation tank 3 after being treated in the aerobic tank 2, then flows into the sedimentation tank 3 through the water passing hole 30 on the top side wall of the aerobic tank 2 and the L-shaped conveying pipe 31, a triangular weir water outlet 12 is arranged on the top side wall of the sedimentation tank 3 on the opposite side of the water passing hole 30, the top side wall of the sedimentation tank 3 is communicated with the top side wall of the inductive coupling filter through the triangular weir water outlet 12, sewage flowing out of the aerobic tank automatically flows into the sedimentation tank 3 to remove a large amount of particles and organic matters, the supernatant flows into the inductive coupling after being deposited through the triangular weir 12, a part of mixed liquid in the sedimentation tank 3 flows out of the sludge and is discharged to a sewage drain 17 through a sewage drain 17.
In the invention, as shown in figure 1, the inductively coupled filter tank comprises a primary inductively coupled filter tank 10 and a secondary inductively coupled filter tank 11 which are formed by two stages of filter tanks, the top side wall of the secondary inductively coupled filter tank 11 far away from one side of the primary inductively coupled filter tank 10 is provided with a water outlet tank 12a, the top side wall of the sedimentation tank 3 is communicated with the top side wall of the primary inductively coupled filter tank 10 through a triangular weir water outlet 12, the bottom of the primary inductively coupled filter tank 10 is communicated with the bottom of the secondary inductively coupled filter tank 11, the perforated baffle 14 horizontally penetrates through the upper part of the bottom of the primary inductively coupled filter tank 10 and the upper part of the secondary inductively coupled filter tank 11 respectively, one end of the perforated baffle 14 is connected to the side wall of the primary inductively coupled filter tank 10 at one side of the triangular weir water outlet 12, the other end of the perforated baffle 14 is connected to the side wall of the secondary inductively coupled filter tank 11 at one side of the water outlet tank 12a, the second aeration branch pipe 13 is horizontally arranged at the bottom of the primary inductively coupled filter tank 10 below the perforated baffle 14 and at one side of the bottom of the secondary inductively coupled filter tank 11, the second aeration branch pipe 13 is arranged near the triangular water outlet 12 side of the primary inductively coupled filter tank 10 and is communicated with a second air guide branch pipe 13 at the second stage 10 and a side of the second air guide valve 18; the electrode matrix 18 is a columnar electrode, porous dephosphorization filler 8 with the particle size of 10mm-30mm is respectively paved in the primary inductive coupling filter tank 10 and the secondary inductive coupling filter tank 11 and between the level of the triangular weir water outlet 12 and the surface of the perforated baffle 14, and the porous dephosphorization filler takes fly ash, gypsum, phosphogypsum, cement, quicklime and the like as raw materials, and forms dephosphorization filler containing a large number of uniform and fine pores through high-temperature steam, and has the characteristics of light volume weight, good mechanical strength, developed pores, easy film hanging, extremely strong phosphorus adsorptivity and the like; the method is characterized in that pebbles 21 with the particle size of 2mm-10mm are paved in the primary inductive coupling filter tank 10 and on the porous dephosphorization filler 8, quartz sand 20 with the particle size of 0.8mm-1.5mm is paved in the secondary inductive coupling filter tank 11 and on the porous dephosphorization filler 8, the volume ratio of the pebbles 21 in the primary inductive coupling filter tank 10 to the porous dephosphorization filler 8 is 2:1, the volume ratio of the quartz sand 20 in the secondary inductive coupling filter tank 11 to the porous dephosphorization filler 8 is 1:1, the thickness of the porous dephosphorization filler 8 in the secondary inductive coupling filter tank 11 is more than 1.5 times of the thickness of the porous dephosphorization filler 8 in the primary inductive coupling filter tank 10, so that the flow of sewage in the secondary inductive coupling filter tank 11 is more than the flow in the primary inductive coupling filter tank 10, and the sewage is purified more fully, and the porous dephosphorization filler 8 comprises fly ash, gypsum, phosphogypsum, quicklime, zirconium dioxide and water according to the mass ratio: 70:15:5:8:25:15:10, stirring into slurry, filling and pouring the slurry into a mould, standing for 2-3 hours, introducing high-temperature steam of 100-150 ℃ to heat the filled and poured slurry for 2-3 hours, gradually cooling and taking out and uniformly cutting into particles of 10-30 mm, curing for 1-3 days under the steam heating condition of 60-80 ℃ to form uniform and fine pore dephosphorization filler, and finally demoulding to obtain a dephosphorization block; the porous dephosphorization filler 8 takes fly ash, gypsum, phosphogypsum, cement, quicklime and zirconia as raw materials, and forms the dephosphorization filler containing a large amount of uniform and fine pores through high-temperature steam, and has the characteristics of light volume weight, good mechanical strength, developed pores, easy film formation, extremely strong phosphorus adsorptivity and the like.
In the invention, as shown in figure 1, columnar electrodes are arranged in a primary inductive coupling filter tank 10 and a secondary inductive coupling filter tank 11 to form an electrode matrix, electrode materials can be conductive materials such as iron, aluminum, graphite or titanium-based coatings, and the like, an external constant-voltage direct-current power supply 19 is connected with the electrodes through wires, the aperture size of a perforated baffle 14 is 5mm-8mm and is mainly used for supporting a porous dephosphorization filler 8 and filtering sewage, the porous dephosphorization filler 8 is prevented from falling to the bottoms of the primary inductive coupling filter tank 10 and the secondary inductive coupling filter tank 11 to block a water flow channel, the sewage passes through pebbles 21 and the porous dephosphorization filler 8 in the primary inductive coupling filter tank 10, then passes through a water flow channel between the perforated baffle 14 and the portion of the primary inductive coupling filter tank 10 and between the perforated baffle 14 and the bottom of the secondary inductive coupling filter tank 11, suspended solids and impurities in the sewage are removed from the bottom of the secondary inductive coupling filter tank 11 through the porous dephosphorization filler 8 and quartz sand 20 under the aeration effect of a second aeration branch pipeline 13, and finally the sewage flows out of a water outlet tank 12 a. In the invention, as shown in figure 1, after the supernatant sewage in the sedimentation tank 3 enters the primary inductive coupling filter tank 10 through the triangular weir water outlet 12, the supernatant sewage passes through pebbles 21 with larger particle sizes from top to bottom, then passes through porous dephosphorization filler 8 with smaller particle sizes, pollutants are adsorbed on the filler, three-dimensional electrolysis is formed under the action of an external electric field of the electrode matrix 18, and organic matters, nitrogen and phosphorus are removed under the combined action of filler, micro-electrolysis and microorganisms; the sewage treated by the first-stage inductive coupling filter tank 10 enters the second-stage inductive coupling filter tank 11 from the bottom, the sewage sequentially passes through the porous dephosphorization filler 8 and the quartz sand 20 from bottom to top, the residual pollutants are adsorbed on the filler, three-dimensional electrolysis is formed under the action of an external electric field of the electrode matrix 18, and organic matters, nitrogen and phosphorus are further removed under the combined action of the filler, micro-electrolysis and microorganisms; in the invention, the removal of organic matters in domestic sewage mainly depends on the biological contact oxidation process of the front section and the electrolytic oxidation of the rear section; the removal of total phosphorus mainly depends on the adsorption action, biological action and electrochemical precipitation action of porous filler; the total nitrogen is removed mainly by biological denitrification and inductive coupling filter technology; the inductive coupling filter technology degrades pollutants under double actions of biology and electrochemistry, the combination of the biological and electrochemistry can form lower ORP (oxidation reduction potential) at a cathode to promote the growth and denitrification of autotrophic denitrifying bacteria, nitrate nitrogen is reduced into nitrogen, and different electrochemical reactions can be generated at an anode according to different electrode materials, so that effects of electric flocculation, electrocatalytic oxidation and the like are generated, and the pollutants can be effectively treated by fully combining the technical advantages of high oxidation reduction capacity of microbial immobilized growth and electrolytic method of a biological film, high efficient mass transfer relationship between the biological membrane and the biological film, and the like.
According to another aspect of the present invention, as shown in fig. 1, the present invention provides a method for sewage treatment based on an AO-MBBR-inductively coupled filter, which comprises the following steps: firstly, domestic sewage is sequentially sent into an anoxic tank 1 and an aerobic tank 2 after being subjected to grid treatment, and the steps of the treatment by microorganisms are as follows: the domestic sewage is firstly treated by a grating and is sent into an anoxic tank 1, a combined filler 7 and an MBBR rapid separation filler 9 are respectively added into the anoxic tank 1 and an aerobic tank 2, and denitrifying bacteria are fixed on the MBBR rapid separation filler 9 in the anoxic tank 1, so that the domestic sewage is subjected to short-cut anaerobic denitrification reaction in the anoxic tank 1; part of ammonia nitrogen in raw water and nitrite and nitrate in reflux liquid in a sedimentation tank 2 are reduced into nitrogen under the combined action of denitrifying bacteria, anaerobic ammonia oxidizing bacteria and the like, microbial flora rapidly grows and breeds in an anoxic tank 3 and activated sludge, pollutants in sewage are intercepted and adsorbed by biological membranes and the activated sludge and serve as nutrient sources of microorganisms, and the sewage is digested in the growth and breeds process, so that the sewage is primarily degraded; the domestic sewage after denitrification reaction enters an aerobic tank 2 from the side wall of the lower end of an anoxic tank 1, and a first aeration branch pipeline 4 is arranged at the bottom of the aerobic tank 2 to maintain an MBBR rapid separation filling 9 in the aerobic tank 2 in a fluidization state; oxygen generated during aeration of the first aeration branch pipeline 4 is fully contacted with domestic sewage, the combined filler 7 and the MBBR rapid separation filler 9, a biological film is formed on the surfaces of the combined filler 7 and the MBBR filler 9 and the inside thereof, a dissolved oxygen gradient is gradually formed from the surfaces of the combined filler 7 and the MBBR filler 9 to the inside, pollutants are promoted to perform a downward oxidation reaction under the action of microorganisms in the aerobic tank 2, an aerobic zone is formed on the surfaces of the combined filler 7, the surfaces of the MBBR rapid separation filler 9 and the surfaces of the biological film, and an anoxic zone or an anaerobic zone is formed inside the aerobic zone, so that synchronous nitrification reaction and denitrification reaction of the pollutants in the domestic sewage are realized; the phosphorus accumulating bacteria excessively absorb phosphorus in water to enter bacteria in an amount exceeding the metabolic demand of the phosphorus accumulating bacteria under the aerobic condition, and finally the effect of removing phosphorus is achieved; secondly, the domestic sewage treated by the microorganisms enters a sedimentation tank 3 for sludge sedimentation, so that sludge-water separation is realized, the sedimented sludge flows back into the anoxic tank 1, and suspended matters in the water body are further removed; finally, supernatant liquid formed after domestic sewage is precipitated in the sedimentation tank 3 enters an inductive coupling filter through a triangular weir water outlet 12, under the action of voltage applied to an electrode matrix 18 by a constant voltage direct current power supply 19 for micro-electrolysis and aeration of a second aeration branch pipeline 13, the flow speed of the supernatant liquid in the inductive coupling filter is accelerated, so that partial organic matters, nitrogen and phosphorus are removed firstly under the actions of adsorbing pollutants from top to bottom through pebble 21 filler and porous dephosphorization filler 8 and micro-electrolysis of the electrode matrix 18 in the inductive coupling filter, and then micro-electrolysis, porous dephosphorization filler 8 and quartz sand 20 adsorb the pollutants again from bottom to top through the electrode matrix 18, and further removing organic matters, nitrogen and phosphorus in the supernatant liquid sewage is realized under the combined action of filler-micro-microorganisms.
In the invention, as shown in figure 1, domestic sewage treated by microorganisms enters a sedimentation tank 3 to carry out sludge sedimentation so as to realize sludge-water separation, and the method comprises the following treatment steps that the domestic sewage enters the sedimentation tank 3 to carry out sludge-water separation, so that supernatant sewage is formed at the upper part in the sedimentation tank 3, the supernatant sewage automatically flows into a primary inductive coupling filter tank 10 and a secondary inductive coupling filter tank 11 of the inductive coupling filter tank after being deposited through a triangular weir water outlet 12, part of sludge-water mixed liquid in the sedimentation tank 3 flows back to an anoxic tank 1 through a sludge reflux pump 6 to carry out denitrification, and nitrite generated in the sedimentation tank 3 flows back to the anoxic tank 1 to realize denitrification reaction; a part of the waste water is discharged through a drain outlet 17; after entering the primary inductive coupling filter tank 10 through the water distribution tank 12, the supernatant fluid firstly passes through pebble 21 filler with larger particle size from top to bottom in the primary inductive coupling filter tank 10, then passes through porous dephosphorization filler 8 with smaller particle size, and forms three-dimensional electrolysis under the action of an external electric field of the electrode matrix 18 and under the action of aeration through the second aeration branch pipeline 13, the pollutants in the supernatant fluid sewage are adsorbed and the organic matters, nitrogen and phosphorus pollutants in the supernatant fluid sewage are removed; the supernatant sewage treated by the primary inductive coupling filter tank 10 enters the secondary inductive coupling filter tank 11 from the bottom, flows from bottom to top in the secondary inductive coupling filter tank 11, sequentially passes through the porous dephosphorization filler 8 and the quartz sand 20, and forms three-dimensional electrolysis under the action of an external electric field of the electrode matrix 18, so that the residual pollutants in the supernatant sewage are fully contacted with the porous dephosphorization filler 8 and the quartz sand 20, and the pollutants in the supernatant sewage are adsorbed and micro-electrolyzed, thereby further removing organic matters, nitrogen and phosphorus pollutants in the supernatant sewage.
In the invention, in order to verify the treatment effect of the treatment system, the treatment system is used for rural sewage treatment stations in a village, sewage is regulated and lifted to be treated by the integrated AO-MBBR-inductively coupled filter system through a lifting pump after larger suspended matters are filtered by a grid, water is precipitated by a secondary sedimentation tank, the electrode material is selected to be iron as an anode, graphite is used as a cathode, and the water inflow is 30m 3 D, debugging and aerating the system, wherein the water quality result of the effluent during normal operation is shown in the table 1, and the effluent NH 3 The N, the SS and the TP all reach the first-level A standard of pollutant emission standards of urban sewage treatment plants (GB 18918-2002), the COD of effluent reaches the first-level B standard, and the treated effluent is used for farmland irrigation water.
TABLE 1 Inlet and outlet Water quality index content (mg/L unit)
| Index (I) | COD | NH 3 -N | SS | TP |
| Water quality of inlet water | 240 | 60.00 | 180 | 2.80 |
| Effluent quality | 58.89 | 2.54 | 8.60 | 0.27 |
| Removal rate of | 75.5％ | 95.8％ | 95.2％ | 90.4％ |
| First class A standard | 50.00 | 5.00 | 10.00 | 0.50 |
| Class IV standard for surface water | 30 | 1.5 | — | 0.3 |
As can be seen from Table 1, the invention provides a system and a process for treating AO-MBBR-inductively coupled filter tank by using scattered domestic sewage based on the problems of small sewage amount, large water quality and water amount change, difficult centralized treatment and the like in rural domestic sewage treatment at present, and can simultaneously remove nitrogen, phosphorus and organic matters; the AO-MBBR-inductively coupled filter tank treatment system has high treatment efficiency and good effect on pollutants in sewage; for domestic sewage, indexes of water organic matters, nitrogen and phosphorus removed by combined process treatment can reach the first-level B standard and above in pollutant emission standards of urban sewage treatment plants (GB 18918-2002), so that the system can meet emission requirements, can stably operate for a long time, is simple and convenient in operation and maintenance management, has low energy consumption, is suitable for on-site treatment and recycling of water quality of distributed rural domestic sewage, tourist attraction sewage, landscape water, lake water and the like with small water quantity and large water quality and water quantity change, and has good application prospect.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. A sewage treatment method based on an AO-MBBR-inductively coupled filter tank is characterized in that a sewage treatment system is used for sewage treatment, and the sewage treatment system comprises an anoxic tank (1), an aerobic tank (2), a sedimentation tank (3), a constant-voltage direct-current power supply (19) and the inductively coupled filter tank; the bottom of the anoxic tank (1) is communicated with the bottom of the aerobic tank (2), the top side wall of the aerobic tank (2) is communicated with the sedimentation tank (3), the top side wall of the sedimentation tank (3) is communicated with the inductive coupling filter tank, an electrode matrix (18) is arranged in the inductive coupling filter tank, a constant-voltage direct-current power supply (19) is electrically connected with the electrode matrix, a second aeration branch pipeline (13) is arranged at the bottom of the inductive coupling filter tank, a perforated baffle (14) is horizontally arranged in the inductive coupling filter tank close to the upper part of the second aeration branch pipeline (13), and an aeration main pipe (15) which is communicated with each other is arranged between the inductive coupling filter tank and the anoxic tank (1) and the aerobic tank (2);
the bottom in the anoxic tank (1) and the bottom in the aerobic tank (2) are respectively provided with a first aeration branch pipe (4), microporous aeration disks (40) are uniformly distributed on the first aeration branch pipe (4), the first aeration branch pipe (4) in the anoxic tank (1) and the aerobic tank (2) are respectively communicated with the aeration main pipe (15) through a first air guide branch pipe (4 a), a blower (5) is arranged on the aeration main pipe (15), a combined filler (7) and an MBBR rapid separation filler (9) are respectively arranged in the anoxic tank (1) and the aerobic tank (2) and above the first aeration branch pipe (4), a first air check valve (4 b) is arranged on the first air guide branch pipe (4 a), water passing holes (30) are arranged on the top side wall of the aerobic tank (2), an L-shaped conveying pipe (31) communicated with the water passing holes (30) is arranged in the sedimentation tank (3), the upper end of the L-shaped conveying pipe (31) is connected with the water outlet side wall (30) of the sedimentation tank (3) at one side, which is close to the water outlet side of the sedimentation tank (3), the water outlet side (12) is arranged on the opposite side wall (12) of the sedimentation tank (3), the top side wall of the sedimentation tank (3) is communicated with the top side wall of the inductive coupling filter tank through a triangular weir water outlet (12); a sewage outlet (17) and a submerged sludge reflux pump (6) are arranged near the bottom of the sedimentation tank (3), and the output end of the submerged sludge reflux pump (6) is communicated with the bottom of the anoxic tank (1) through a reflux pipe (60);
the inductive coupling filter tank comprises a primary inductive coupling filter tank (10) and a secondary inductive coupling filter tank (11) which are formed by two stages of filter tanks, a water outlet tank (12 a) is arranged on the top side wall of the secondary inductive coupling filter tank (11) far away from one side of the primary inductive coupling filter tank (10), the top side wall of the sedimentation tank (3) is communicated with the top side wall of the primary inductive coupling filter tank (10) through a triangular weir water outlet (12), the bottom of the primary inductive coupling filter tank (10) is communicated with the bottom of the secondary inductive coupling filter tank (11), a perforated baffle plate (14) horizontally penetrates through the top of the bottom of the primary inductive coupling filter tank (10) and the top of the bottom of the secondary inductive coupling filter tank (11), one end of the perforated baffle plate (14) is connected to the side wall of the primary inductive coupling filter tank (10) on one side of the triangular weir water outlet (12 a), the other end of the perforated baffle plate (14) is horizontally arranged on the bottom of the secondary inductive coupling filter tank (11) below the perforated baffle plate (14) and the bottom of the secondary inductive coupling filter tank (11), a second air guide branch pipe (13 a) which extends downwards from the top end to the bottom end of the first-stage inductive coupling filter tank (10) and is communicated with a second aeration branch pipe (13) is arranged at one side close to the triangular weir water outlet (12) and is communicated with an aeration main pipe (15), an electrode matrix (18) is respectively arranged in the first-stage inductive coupling filter tank (10) and the second-stage inductive coupling filter tank (11), and a second air check valve (16) is arranged on the second air guide branch pipe (13 a);
porous dephosphorization filler (8) with the particle size of 10mm-30mm is respectively paved in the primary inductive coupling filter tank (10) and the secondary inductive coupling filter tank (11) and between the level of the triangular weir water outlet (12) and the surface of the perforated baffle plate (14); pebbles (21) with the particle size of 2-10 mm are paved in the primary inductive coupling filter tank (10) and on the porous dephosphorization filler (8), and quartz sand (20) with the particle size of 0.8-1.5 mm is paved in the secondary inductive coupling filter tank (11) and on the porous dephosphorization filler (8);
the volume ratio of pebbles (21) to porous dephosphorization filler (8) in the primary inductive coupling filter tank (10) is 2:1, the volume ratio of quartz sand (20) to porous dephosphorization filler (8) in the secondary inductive coupling filter tank (11) is 1:1, and the thickness of the porous dephosphorization filler (8) in the secondary inductive coupling filter tank (11) is more than 1.5 times that of the porous dephosphorization filler (8) in the primary inductive coupling filter tank (10);
the sewage treatment method comprises the following steps: the domestic sewage is treated by a grating and then sequentially sent into an anoxic tank (1) and an aerobic tank (2) for treatment by microorganisms; the domestic sewage after microbial treatment enters a sedimentation tank (3) for sludge sedimentation, so that supernatant sewage is formed at the upper part in the sedimentation tank (3), and automatically flows into a primary inductive coupling filter tank (10) and a secondary inductive coupling filter tank (11) of the inductive coupling filter tank after being deposited through a triangular weir water outlet (12), wherein a part of muddy water mixed liquor in the sedimentation tank (3) flows back to an anoxic tank (1) for denitrification and denitrification through a sludge reflux pump (6) and a reflux pipe (60), and a part of muddy water mixed liquor is discharged through a sewage outlet (17); after entering the primary inductive coupling filter tank (10) through the triangular weir water outlet (12), the supernatant fluid firstly passes through pebbles (21) with large particle sizes from top to bottom in the primary inductive coupling filter tank (10), then passes through porous dephosphorization fillers (8) with smaller particle sizes, forms three-dimensional electrolysis under the action of an external electric field of an electrode matrix (18) and absorbs and removes organic matters, nitrogen and phosphorus pollutants in the supernatant fluid sewage under the action of aeration through a second aeration branch pipeline (13); supernatant sewage treated by the primary inductive coupling filter tank (10) enters the secondary inductive coupling filter tank (11) from the bottom, flows from bottom to top in the secondary inductive coupling filter tank (11), sequentially passes through the porous dephosphorization filler (8) and the quartz sand (20), and forms three-dimensional electrolysis under the action of an external electric field of the electrode matrix (18), so that residual pollutants in the supernatant sewage fully contact with the porous dephosphorization filler (8) and the quartz sand (20), and the pollutants in the supernatant sewage are adsorbed and micro-electrolyzed, thereby deeply removing organic matters, nitrogen and phosphorus pollutants in the supernatant sewage.
2. The wastewater treatment method based on the AO-MBBR-inductively coupled filter tank of claim 1, wherein the method comprises the following steps: the electrode matrix (18) is an electrode array formed by spacing columnar electrodes.
3. The wastewater treatment method based on the AO-MBBR-inductively coupled filter tank of claim 1, wherein the method comprises the following steps: the method comprises the steps that domestic sewage is sent into an anoxic tank (1) and an aerobic tank (2) through grid treatment and is treated by microorganisms, and the method comprises the following steps that after the domestic sewage is sent into the anoxic tank (1) through the grid treatment, combined filler (7) and MBBR rapid separation filler (9) are respectively added into the anoxic tank (1) and the aerobic tank (2), and denitrifying bacteria are fixed on the MBBR rapid separation filler (9) in the anoxic tank (1), so that the domestic sewage is subjected to short-range anaerobic denitrification reaction in the anoxic tank (1); the domestic sewage after anaerobic denitrification reaction enters an aerobic tank (2) from the side wall of the lower end of the anoxic tank (1), a first aeration branch pipeline (4) is arranged at the bottom of the aerobic tank (2), and MBBR packing (9) in the aerobic tank (2) is maintained in a fluidization state; the aeration flow generated by the first aeration branch pipeline (4) is fully contacted with domestic sewage, the combined filler (7) and the MBBR rapid separation filler (9), a biological film is formed on the surfaces and the inside of the combined filler (7) and the MBBR rapid separation filler (9), a dissolved oxygen gradient is gradually formed from the surfaces of the combined filler (7) and the MBBR rapid separation filler (9) to the inside, pollutants are promoted to perform a downward oxidation reaction in the aerobic tank (2), an aerobic zone is formed on the surfaces of the combined filler (7), the surfaces of the MBBR rapid separation filler (9) and the surfaces of the biological film, and an anoxic zone or an anaerobic zone is formed in the combined filler to realize the nitrification reaction of the pollutants in the domestic sewage.
4. The wastewater treatment method based on the AO-MBBR-inductively coupled filter tank of claim 1, wherein the method comprises the following steps: the preparation process of the porous dephosphorization filler (8) comprises the following steps of: 70:15:5:8:25:15:10, stirring into slurry, filling and pouring the slurry into a mould, standing for 2-3 hours, introducing high-temperature steam of 100-150 ℃ to heat the filled and poured slurry for 2-3 hours, gradually cooling and taking out the slurry, uniformly cutting the slurry into particles of 10-30 mm, curing the particles for 1-3 days under the steam heating condition of 60-80 ℃ to form uniform and fine pore dephosphorization filler, and finally demoulding to obtain the dephosphorization block.
5. The wastewater treatment method based on the AO-MBBR-inductively coupled filter tank of claim 1, wherein the method comprises the following steps: the aperture of the perforated baffle plate (14) is 10-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106737.8A CN113772890B (en) | 2021-09-22 | 2021-09-22 | Sewage treatment system and treatment method based on AO-MBBR-inductively coupled filter tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111106737.8A CN113772890B (en) | 2021-09-22 | 2021-09-22 | Sewage treatment system and treatment method based on AO-MBBR-inductively coupled filter tank |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010096A1 (en) * | 2010-07-20 | 2012-01-26 | 华南理工大学 | Device for synchronously removing nitrogen and phosphorus in mixed municipal sewage and fecal sewage by using a2/o-biomembrane and method thereof |
| CN106006946A (en) * | 2016-05-26 | 2016-10-12 | 南京大学 | Electrolytically modified quartz sand filter bed and application thereof |
| CN112321078A (en) * | 2020-10-29 | 2021-02-05 | 北京邦源环保科技股份有限公司 | Domestic sewage treatment all-in-one |
| CN212924725U (en) * | 2020-05-26 | 2021-04-09 | 北京城市排水集团有限责任公司 | Biological nitrogen and phosphorus removal integrated sewage treatment device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010096A1 (en) * | 2010-07-20 | 2012-01-26 | 华南理工大学 | Device for synchronously removing nitrogen and phosphorus in mixed municipal sewage and fecal sewage by using a2/o-biomembrane and method thereof |
| CN106006946A (en) * | 2016-05-26 | 2016-10-12 | 南京大学 | Electrolytically modified quartz sand filter bed and application thereof |
| CN212924725U (en) * | 2020-05-26 | 2021-04-09 | 北京城市排水集团有限责任公司 | Biological nitrogen and phosphorus removal integrated sewage treatment device |
| CN112321078A (en) * | 2020-10-29 | 2021-02-05 | 北京邦源环保科技股份有限公司 | Domestic sewage treatment all-in-one |
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