CN103755025B - Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal - Google Patents

Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal Download PDF

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CN103755025B
CN103755025B CN201310728713.5A CN201310728713A CN103755025B CN 103755025 B CN103755025 B CN 103755025B CN 201310728713 A CN201310728713 A CN 201310728713A CN 103755025 B CN103755025 B CN 103755025B
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aerobic
membrane bioreactor
anoxic
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sludge
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CN103755025A (en
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张传义
袁丽梅
沈雪
王冰冰
夏彬
褚建松
张雁秋
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China University of Mining and Technology CUMT
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Abstract

The invention relates to a double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal. An anaerobic/anoxia membrane bioreactor and an aerobic membrane bioreactor are connected in series so as to enhance denitrifying phosphorus removal through a double-membrane filtration two-way circulation mode. The double-membrane double-circulation sewage treatment process comprises the steps of: firstly, carrying out anaerobic phosphorus release on phosphorus-accumulating bacteria under anaerobic condition, and storing organic matters in inflowing water as poly-beta-hydroxybutyric acid; then circulating supernate subjected to anaerobic phosphorus release to the aerobic membrane bioreactor for carrying out aerobic nitrification and degrading organic matters through a membrane assembly, circulating nitrifying liquid in the aerobic membrane bioreactor to the anaerobic/anoxia membrane bioreactor for carrying out denitrifying phosphorus removal through the membrane assembly; then filtering effluent water by utilizing the membrane assembly, and finally discharging phosphorous-rich sludge, thus realizing the phosphorous removal. According to the double-membrane double-circulation sewage treatment process, the thorough separation of nitrobacterium and phosphorous-accumulating bacteria can be realized, the carbon source competence of different microorganisms and sludge age conflict in the traditional denitrification and phosphorous removal processes can be solved, and the carbon sources and running cost can be saved; the membrane filtration can meet the requirement on the quality of sewage recycled water; the process is simple in flow and convenient to operate.

Description

A kind of two film Two-way Cycle sewage treatment process of intensified anti-nitrated phosphorous-removal
Technical field
The present invention relates to technical field of waste water processing, especially a kind of two film Two-way Cycle water technologies of reinforced low-carbon source urban sewage denitrification dephosphorization.
Background technology
Body eutrophication is paid close attention to widely because having serious environmental hazard.Body eutrophication can affect the normal reoxygenation level of air, reduces dissolved oxygen concentration in water body, causes hydrocoles and fish kill, and aquatic algae can produce biotoxin simultaneously, and hydrobiont and person poultry poisoning also can be caused to cause a disease.And anthropogenic discharge is the important factor of the body eutrophication caused containing the trade effluent of nutritive substance (nitrogen, phosphorus) and sanitary sewage.The denitrogenation dephosphorizing usefulness improving sewage work is one of effective measure of prevention body eutrophication generation, and in order to control the day by day serious trend of body eutrophication, many areas or country have put into effect stricter sewerage nitrogen and phosphor emission standard in succession.Total nitrogen, total phosphorus emission standard: TP≤0.5mg/L, TN≤8 mg/L (one-level A standard) as " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) clear stipulaties that China implements recently.
Traditional biological phosphate-eliminating technology is thought, denitrification process and dephosphorization process all need to consume carbon source, namely there is the problem that denitrifying bacterium and polyP bacteria are competed carbon source, meanwhile there is organic concentration in China's municipal effluent more and more lower, the carbon nitrogen of sewage, the phenomenon of carbon-phosphorus ratio continuous decrease.Traditional sewage treatment process is (as A 2/ O, improvement A 2/ O, UCT, SBR etc.) there is certain denitrogenation and dephosphorization function, but owing to there is the contradiction of carbon source competition and mud difference in age in denitrogenation and dephosphorization process, dephosphorization and denitrogenation restrict mutually, actual operating performance is unsatisfactory, and have that floor space is comparatively large, energy consumption is more, the drawbacks such as excess sludge production is larger.
At present, denitrification nitrogen and phosphorus removal technology is the focus of dirty water living creature processing technique research.Research shows, occurring in nature also exists another kind of denitrifying phosphorus removing bacteria (Denitrifying phosphate Removal Bacteria, DPB), denitrifying phosphorus removing bacteria using NO3-N and NO2-N as final electron acceptor(EA), can realize the excessive consumption of phosphorus in water under anoxic conditions.Denitrification dephosphorization breaches the mechanism of anaerobic phosphorus release in traditional biological dephosphorization process, aerobic suction phosphorus, solves the contradiction between denitrifying bacteria and polyP bacteria, is particularly useful for high nitrogen phosphorus waste water and low carbon source urban sewage.Compared with traditional technology, the organism (COD) that Denitrifying Phosphorus Removal Technology can save 50% consumes, reduces the aeration energy consumption of about 30% and the sludge yield of 50%, and therefore denitrification dephosphorization is considered to be one " sustainable process for removing nitrogen and phosphor from sewage ".
At present about the main single sludge system of technical study and two sludge system two type of denitrification dephosphorization.
(1) single sludge system denitrification dephosphorization
Sequencing batch reactor (SBR) belongs to typical single sludge system denitrifying phosphorus removal technique.This technique takes the operation scheme of sequence batch (, by anaerobism, anoxic and aerobic replacing, makes system realize the function of denitrogenation dephosphorizing.But in the operational process of SBR technique, dephosphorization bacterial, denitrifying bacteria, nitrifier etc. coexist in same active sludge, inevitably there is competition in mud age between nitrifier and dephosphorization bacterial and denitrifying bacteria and dephosphorization bacterial to the competition of organism (carbon source), make dephosphorization and nitratedly to interfere with each other, causing denitrogenation dephosphorizing efficiency to be difficult to further raising.
Sequencing batch biofilm reactor (SBBR) also belongs to a kind of deformation technique of single sludge system.This technique utilizes microbial film strengthen nitrification effect and carry out a kind of technique of denitrogenation dephosphorizing.Microbial film grows nitrifier and Denitrifying Phosphate Accumulating Organisms simultaneously, microbial film is conducive to the growth of longer nitrobacteria in mud age, thus improves the efficiency of biological denitrificaion.Because SBBR is a kind of technique derived on the basis of SBR, therefore also there are some shortcomings in SBR.
(2) two sludge system denitrification dephosphorization
Two sludge system is grown independent of in above-mentioned two identical reactors short distance nitration bacterium and Denitrifying Phosphate Accumulating Organisms, connected by two reactors, to realize the backflow of supernatant liquor by pipeline.This technique to solve in SBR and SBBR technique inconsistent problem in carbon source competition and mud in dephosphorization and denitrification process age.But two sludge system also exists, and reactor quantity is many, mud pipeline is complicated and the drawback such as complex operation.
In sum, Denitrifying Phosphorus Removal Technology has obvious advantage in current municipal effluent denitrogenation dephosphorizing, and development potentiality is huge.And mainly contain single sludge system and two sludge system about the technology type of denitrification dephosphorization research at present.Single sludge system (SBR, SBBR) has certain denitrification dephosphorization usefulness, but multiple population is because of mud (SBR) difference in age and different to DO and nutritional needs in single sludge system, influence each other between different microorganisms, cause denitrification dephosphorization usefulness to be difficult to increase substantially.Two sludge system such as A2N technique, anaerobic-aerobic-anoxic staged reactor etc. can achieve the enrichment of Denitrifying Phosphate Accumulating Organisms preferably.But two sludge system will through repeatedly precipitation and multistage backflow, and two sludge system exists technical process complexity, operation inconvenience, controls many weak points such as loaded down with trivial details, and its denitrification dephosphorization usefulness and stability need to be improved further.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, a kind of two film Two-way Cycle sewage treatment process of intensified anti-nitrated phosphorous-removal are provided, by arranging membrane filter unit in aerobic membrane bioreactor and detesting/anoxic membrane bioreactor, take the operation scheme of anaerobic supernatant and the circulation of aerobic nitrification liquid synchronous membrane filtration, thus achieve carry out aerobic nitrification and anoxic denitrification dephosphorization process simultaneously in two reactors.
Technical scheme: two film Two-way Cycle sewage treatment process of intensified anti-nitrated phosphorous-removal of the present invention, comprise adjustment in use pond, detest/anoxic membrane bioreactor, aerobic membrane bioreactor, sludge thickener and sludge pump, take the operation scheme of sequence batch (, carry out into water/anaerobic phosphorus release stage, aerobic nitrification and denitrification dephosphorization Two-way Cycle stage, two film filtration effluent stage and spoil disposal stage four-stage successively;
Described water inlet/anaerobic phosphorus release stage be by intake pump the sewage in equalizing tank pumped into detest/anoxic membrane bioreactor in carry out anaerobic phosphorus release;
Described aerobic nitrification and denitrification dephosphorization Two-way Cycle stage comprise aerobic nitrification circulation and denitrification dephosphorization circulates two processes, and two course synchronization carry out;
Described two film filtration effluent stages comprise detests/anoxic film filtration effluent and aerobic film filtration effluent two processes, and two course synchronization carry out;
The described spoil disposal stage be by detesting/anoxic membrane bioreactor sludge pump and aerobic membrane bioreactor sludge pump respectively detesting/anoxic membrane bioreactor in phosphorus containing sludge and excess sludge in aerobic membrane bioreactor drain in sludge thickener and carry out concentration.
Described aerobic nitrification working cycle: comprise startup to detest/anoxic membrane bioreactor recycle pump, open anaerobism circulation valve, by detesting/Anoxic goes out pump handle to be detested/the biological oxygen reactor of anoxic film in active sludge supernatant liquor by detesting/anoxic membrane bioreactor membrane module is circulated to aerobic membrane bioreactor 3 and carries out aerobic nitrification and degradation of organic substances.
Described denitrification dephosphorization working cycle: comprise startup gas blower, open aerobic circulation valve, by aerobic recycle water pump hold active sludge supernatant liquor in aerobic membrane bioreactor to be circulated to by aerobic membrane bioreactor membrane module detest/aerobic membrane bioreactor in carry out anoxic denitrification and inhale phosphorus.
Described detests/anoxic film filtration effluent process: open out anaerobic effluent valve, by detesting/Anoxic go out water pump by detesting/anoxic membrane bioreactor membrane module detesting/anoxic membrane bioreactor in mixed solution carry out filtration water outlet.
Described aerobic film filtration effluent process: open outputted aerobic water valve, filters water outlet by aerobic membrane bioreactor membrane module the mixed solution in aerobic membrane bioreactor by the aerobic water pump that recycles.
Beneficial effect: the present invention by arranging membrane filter unit in aerobic membrane bioreactor and detesting/anoxic membrane bioreactor, take the operation scheme of anaerobic supernatant and the synchronous membrane filtration circulation of aerobic nitrification liquid, achieve carry out aerobic nitrification and anoxic denitrification dephosphorization process simultaneously in two reactors.The effect utilizing membrane filtration to achieve muddy water to be almost separated completely, nitrobacteria and dephosphorization bacterial is made to be trapped in aerobic membrane bioreactor and anaerobic/anoxic membrane reactor respectively, really achieve being separated completely of polyP bacteria and nitrobacteria, effectively prevent influencing each other and competition to matrix between different microorganisms, ensure different microorganisms good growing environment in respective system, enhance nitrification effect and denitrification dephosphorization usefulness; Take membrane sepn to replace traditional precipitate and separate unit, can make to maintain high biological concentration in anaerobic/anoxic membrane reactor and aerobic membrane bioreactor, ensure that nitrification effect reduces working time simultaneously; Take the operation scheme of membrane filtration backflow supernatant liquor simultaneously, eliminate the sludge recirculation system in traditional denitrification dephosphorization technique, saved operation piping system and operation energy consumption.Nitrobacteria is fully achieved and polyP bacteria divides the envrionment conditions grown in respective system by the crown_interception of film, efficiently solve in dephosphorization and denitrification process the contradiction of carbon source competition and mud contradiction in age, take the mode of anaerobic/anoxic supernatant liquor and aerobic nitrification liquid synchronised recycling, achieve the effect of aerobic nitrification and anoxic denitrification dephosphorization simultaneously, enhance the denitrification dephosphorization usefulness of low-carbon-source sewage, and take the mode of aerobic membrane bioreactor and anaerobic/anoxic membrane reactor film filtration effluent simultaneously, only rely on aerobic film filtration effluent to compare with tradition and shorten water discharging time.Its technique has that flow process is simple, the cycle of operation is short, biological concentration is high, takes up an area towards little, the advantage such as effluent quality good, convenient operation and management.To the exploitation of sewage treatment technique and the upgrading of existing sewage work, there is great importance.
Accompanying drawing explanation
Fig. 1 is two film Two-way Cycle sewage treatment process figure of intensified anti-nitrated phosphorous-removal of the present invention.
In figure: 1-equalizing tank, 2-detests/anoxic membrane bioreactor, 3-aerobic membrane bioreactor, 4-sludge thickener, 5-detests/anoxic membrane bioreactor membrane module, 6-aerobic membrane bioreactor membrane module, 7-intake pump, 8-detests/and Anoxic goes out water pump, 9-is aerobic recycles water pump, 10-anaerobic effluent valve, 11-outputted aerobic water valve, 12-anaerobism circulation valve, the aerobic circulation valve of 13-, 14-gas blower, 15-detests/anoxic membrane bioreactor recycle pump, 16-detests/anoxic membrane bioreactor sludge pump, 17-aerobic membrane bioreactor sludge pump.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Two film Two-way Cycle sewage treatment process of intensified anti-nitrated phosphorous-removal of the present invention, adopt equalizing tank 1, detest/anoxic membrane bioreactor 2, aerobic membrane bioreactor 3, sludge thickener 4, wherein detest/anoxic membrane bioreactor 2 becomes reconciled in membrane bioreactor 3 and is equipped with membrane module respectively, for circulation and the film water outlet of supernatant liquor and nitrification liquid; Detesting/anoxic membrane bioreactor 2 in by detesting/anoxic membrane bioreactor recycle pump 8 realizes washing away with decelerating membrane pollution to face, rinsed with controlling diaphragm pollution face by blast aeration in good membrane bioreactor, aeration also plays the effect to microorganism oxygen supply simultaneously.By sludge pump spoil disposal to realize the removal of phosphorus, and carry out sludge condensation process.
Adopt the operation scheme of sequence batch (, carry out into water/anaerobic phosphorus release stage, aerobic nitrification and denitrification dephosphorization Two-way Cycle stage, two film filtration effluent stage and spoil disposal stage four-stage successively; Four-stage is a cycle of operation;
Described water inlet/anaerobic phosphorus release stage be by intake pump 7 sewage in equalizing tank 1 pumped into detest/anoxic membrane bioreactor 2 in carry out anaerobic phosphorus release;
Described aerobic nitrification and denitrification dephosphorization Two-way Cycle stage comprise aerobic nitrification circulation and denitrification dephosphorization circulates two processes, two course synchronization carry out, this synchronised recycling stage adopt detest/anoxic membrane bioreactor 2, aerobic membrane bioreactor 3, detest/anoxic membrane bioreactor membrane module 5, aerobic membrane bioreactor membrane module 6, detest/Anoxic goes out water pump 8, aerobicly recycles water pump 9, anaerobism circulation valve 12, aerobic circulation valve 13 and gas blower 14;
Described aerobic nitrification working cycle: comprise startup to detest/anoxic membrane bioreactor recycle pump 15, open anaerobism circulation valve 12, by detesting/Anoxic go out water pump 8 detesting/the biological oxygen reactor 2 of anoxic film in active sludge supernatant liquor by detesting/anoxic membrane bioreactor membrane module 5 is circulated to aerobic membrane bioreactor 3 and carries out aerobic nitrification and degradation of organic substances; Described denitrification dephosphorization working cycle: comprise and start gas blower 14, open aerobic circulation valve 13, by aerobic recycle water pump 9 the active sludge supernatant liquor in aerobic membrane bioreactor 3 is circulated to by aerobic membrane bioreactor membrane module 6 detest/aerobic membrane bioreactor 2 in carry out anoxic denitrification and inhale phosphorus.
Described two film filtration effluent stages comprise detests/anoxic film filtration effluent and aerobic film filtration effluent two processes, and two course synchronization carry out; These synchronous two film filtration effluent stages adopt detest/anoxic membrane bioreactor membrane module 5, aerobic membrane bioreactor membrane module 6, anaerobic effluent valve 10, outputted aerobic water valve 11, detest/Anoxic goes out water pump 8, aerobicly recycles water pump 9;
Described detests/anoxic film filtration effluent process: open out anaerobic effluent valve 10, by detesting/Anoxic go out water pump 8 by detesting/anoxic membrane bioreactor membrane module 5 detesting/anoxic membrane bioreactor 2 in mixed solution carry out filtration water outlet; Described aerobic film filtration effluent process: open outputted aerobic water valve 11, filters water outlet by aerobic membrane bioreactor membrane module 6 the mixed solution in aerobic membrane bioreactor 3 by the aerobic water pump 9 that recycles;
Described spoil disposal stage adopts detests/anoxic membrane bioreactor sludge pump 16, aerobic membrane bioreactor sludge pump 17 and sludge thickener 4, by detesting/anoxic membrane bioreactor sludge pump 16 and aerobic membrane bioreactor sludge pump 17 respectively detesting/anoxic membrane bioreactor 2 in phosphorus containing sludge and excess sludge in aerobic membrane bioreactor 3 drain in sludge thickener 4 and carry out concentration.
Carrying out practically process:
Water inlet/anaerobic phosphorus release the stage: by intake pump 7 sewage in equalizing tank pumped into and detest/anoxic membrane bioreactor 2, detest/anoxic membrane bioreactor in polyP bacteria carry out anaerobic phosphorus release reaction and absorb into the organism in water, save as next stage anoxic denitrification and inhale carbon source (PHB) needed for phosphorus;
Aerobic nitrification and denitrification dephosphorization Two-way Cycle stage: this stage comprises two bioprocesses, i.e. aerobic nitrification and anoxic denitrification dephosphorization, two course synchronization carry out.The embodiment of two processes is: 1. aerobic nitrification process: open anaerobism circulation valve 12, close anaerobic effluent valve 10, by detesting/Anoxic go out water pump 8 through detesting/the active sludge supernatant liquor of anoxic membrane bioreactor 2 is circulated to aerobic membrane bioreactor 3 through membrane module 5 and carries out aerobic nitrification, start gas blower 14 simultaneously and carry out aeration, on the one hand for biological respinse in aerobic membrane bioreactor 3 provides required oxygen, slow down the fouling membrane process of aerobic membrane bioreactor membrane module 6 on the other hand.2. anoxic denitrification dephosphorization process: open aerobic circulation valve 13, close outputted aerobic water valve 11, by aerobic recycle water pump 9 hold active sludge nitrification liquid in membrane bioreactor 3 to be circulated to through aerobic membrane bioreactor membrane module 6 detest/anoxic membrane bioreactor carries out anoxic denitrification and inhales phosphorus; Start simultaneously and detest/anoxic membrane bioreactor recycle pump 15, utilize the circulation scouring effect of current to alleviate to detest/fouling membrane the development of anoxic membrane bioreactor membrane module 5;
Two film filtration effluent stage: this stage comprises two film filtration effluent processes, i.e. aerobic film filtration effluent and anoxic film filtration effluent, specific implementation process is:
1. aerobic film filtration effluent: open outputted aerobic water valve 11, close aerobic circulation valve 13, by the aerobic water pump 9 that recycles, the supernatant liquor in the biological oxygen reactor 2 of aerobic film is carried out film filtration effluent through membrane module 5, start gas blower 14 simultaneously and carry out aeration to slow down the fouling membrane process of aerobic membrane bioreactor membrane module 6;
2. anaerobism film filtration effluent: open anaerobic effluent valve 10, close anaerobism circulation valve 12, by detesting/Anoxic go out water pump 8 detesting/the active sludge supernatant liquor of the biological oxygen reactor 2 of anoxic film carries out film filtration effluent through membrane module 5, synchronous open detest/anoxic membrane bioreactor recycle pump 15 forms circulating water flow to be detested to alleviate/the fouling membrane development of anoxic membrane bioreactor membrane module 5;
The spoil disposal stage: by detesting/anoxic membrane bioreactor sludge pump 16 and aerobic membrane bioreactor sludge pump 17 respectively detesting/anoxic membrane bioreactor 2 in phosphorus containing sludge excess sludge in membrane bioreactor 3 of becoming reconciled drain into sludge treatment pond 4 and carry out concentration, in concentration basin, supernatant liquor returns equalizing tank 1 and processes further.
Describedly take the operation scheme of sequence batch (: sewage first enter detest/anoxic membrane bioreactor carries out anaerobic phosphorus release and organic absorption; After anaerobic phosphorus release terminates, by reflux pump the aerobic nitrification liquid in aerobic membrane bioreactor is back to detest/anoxic membrane bioreactor carries out denitrification, simultaneously detesting/anoxic membrane bioreactor in supernatant liquor be back to aerobic membrane bioreactor and carry out nitration reaction; Finally by detesting/anoxic membrane bioreactor and aerobic membrane bioreactor in membrane module carry out filtration water outlet, finally discharge phosphorus containing sludge, after spoil disposal terminates, enter next cycle.The whole service cycle is 5-8h, wherein water inlet/anaerobic phosphorus release 1-2h, aerobic nitrification liquid and the backflow of anaerobic/anoxic supernatant liquor 2-4h, water outlet 1.5-3.5h, spoil disposal 0.1-0.5h.

Claims (1)

1. two film Two-way Cycle sewage treatment process of an intensified anti-nitrated phosphorous-removal, comprise adjustment in use pond (1), detest/anoxic membrane bioreactor (2), aerobic membrane bioreactor (3), sludge thickener (4) and sludge pump, take the operation scheme of sequence batch (, it is characterized in that: carry out into water/anaerobic phosphorus release stage, aerobic nitrification and denitrification dephosphorization Two-way Cycle stage, two film filtration effluent stage and spoil disposal stage four-stage successively;
Described water inlet/anaerobic phosphorus release stage be by intake pump (7) sewage in equalizing tank (1) pumped into detest/anoxic membrane bioreactor carries out anaerobic phosphorus release in (2);
Described aerobic nitrification and denitrification dephosphorization Two-way Cycle stage comprise aerobic nitrification circulation and denitrification dephosphorization circulates two processes, and two course synchronization carry out;
Described aerobic nitrification working cycle: comprise startup to detest/anoxic membrane bioreactor recycle pump (15), open anaerobism circulation valve (12), by detesting/Anoxic go out water pump (8) detesting/the interior active sludge supernatant liquor of anoxic membrane bioreactor (2) by detesting/anoxic membrane bioreactor membrane module (5) is circulated to aerobic membrane bioreactor (3) and carries out aerobic nitrification and degradation of organic substances;
Described denitrification dephosphorization working cycle: comprise and start gas blower (14), open aerobic circulation valve (13), by aerobic recycle water pump (9) the active sludge supernatant liquor in aerobic membrane bioreactor (3) by aerobic membrane bioreactor membrane module (6) be circulated to detest/anoxic membrane bioreactor (2) in carry out anoxic denitrification inhale phosphorus;
Described two film filtration effluent stages comprise detests/anoxic film filtration effluent and aerobic film filtration effluent two processes, and two course synchronization carry out;
The described spoil disposal stage be by detesting/anoxic membrane bioreactor sludge pump (16) and aerobic membrane bioreactor sludge pump (17) respectively detesting/anoxic membrane bioreactor (2) in phosphorus containing sludge and excess sludge in aerobic membrane bioreactor (3) drain in sludge thickener (4) and carry out concentration.
2. two film Two-way Cycle sewage treatment process of a kind of intensified anti-nitrated phosphorous-removal according to claim 1, it is characterized in that: described detests/anoxic film filtration effluent process: open anaerobic effluent valve (10), by detesting/Anoxic go out water pump (8) by detesting/anoxic membrane bioreactor membrane module (5) detesting/anoxic membrane bioreactor (2) in mixed solution carry out filtration water outlet.
3. two film Two-way Cycle sewage treatment process of a kind of intensified anti-nitrated phosphorous-removal according to claim 1, it is characterized in that: described aerobic film filtration effluent process: open outputted aerobic water valve (11), by aerobic membrane bioreactor membrane module (6), the mixed solution in aerobic membrane bioreactor (3) is filtered water outlet by the aerobic water pump (9) that recycles.
CN201310728713.5A 2013-12-25 2013-12-25 Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal Expired - Fee Related CN103755025B (en)

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CN104710081B (en) * 2015-03-18 2016-08-24 河海大学 A kind of sewage denitrification and dephosphorization method and device thereof
CN108862586A (en) * 2018-07-09 2018-11-23 北京恩菲环保股份有限公司 Sewage water treatment method
CN110550739B (en) * 2019-09-29 2022-04-01 上海师范大学 Aerobic and anaerobic VBBR (viable but anaerobic) series coupling device and sewage treatment method

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