CN104386817A - Enhanced nitrogen and phosphorus removal process adopting mud water separation anaerobic/anoxic-membrane bioreactor - Google Patents
Enhanced nitrogen and phosphorus removal process adopting mud water separation anaerobic/anoxic-membrane bioreactor Download PDFInfo
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- CN104386817A CN104386817A CN201410631682.6A CN201410631682A CN104386817A CN 104386817 A CN104386817 A CN 104386817A CN 201410631682 A CN201410631682 A CN 201410631682A CN 104386817 A CN104386817 A CN 104386817A
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- membrane bioreactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
Abstract
The invention relates to an enhanced nitrogen and phosphorus removal process adopting a mud water separation anaerobic/anoxic-membrane bioreactor and belongs to a nitrogen and phosphorus removal process for environmental sewage. The enhanced nitrogen and phosphorus removal process adopting the mud water separation anaerobic/anoxic-membrane bioreactor is characterized in that an anaerobic/anoxic-membrane bioreactor provided with a built-in three-phase separator and a membrane bioreactor form a two-sludge system, so that a nitrogen and phosphorus removal function is enhanced. The enhanced nitrogen and phosphorus removal process comprises the following steps: firstly, causing sewage to enter an anaerobic/anoxic reactor, releasing phosphorus under the anaerobic condition, carrying out mud water separation on the sewage by virtue of the three-phase separator, and carrying out aerobiotic nitrification on supernate automatically flowing to the membrane bioreactor; after nitrification is finished, feeding a nitrification liquid into the anaerobic/anoxic reactor in a circulating manner and carrying out denitrifying phosphorus removal, circulating supernate of the anaerobic/anoxic reactor to an anaerobic membrane bioreactor, feeding water and draining membrane filtration water synchronously after circulation is finished, and finally discharging rich phosphorous sludge for realizing phosphorus removal. The enhanced nitrogen and phosphorus removal process adopting the mud water separation anaerobic/anoxic-membrane bioreactor has the advantages that effective separation of phosphorus-accumulating bacteria and nitrifying bacteria is realized, denitrifying phosphorus removal efficiency is enhanced, carbon source is saved, operating cost is reduced, a technological process is simple, and operation is easy.
Description
Technical field
The present invention relates to a kind of denitrification dephosphorization technique to environmental wastewater, particularly a kind of strengthening mud-water separation detests/anoxic-membrane bioreactor denitrification dephosphorization technique.
Background technology
Along with the fast development of society, the waste water of the rich Nitrogen-and Phosphorus-containing that people produce in life with production grows with each passing day, and enters water body, causes the eutrophication of water body, produce serious environmental problem.On the other hand, along with the raising of quality of life, people are also constantly improving the requirement of environment, and contradiction is therebetween given prominence to gradually.Sewage drainage standard be increasingly strictly development trend general at present and an urgent demand, by the major objective controlling nitrogen for the purpose of eutrophication, phosphorus ligands has become sewage disposal.
Traditional bio-denitrification technology mainly relies on nitrifier and denitrifying bacteria, and dephosphorization depends on polyP bacteria, and denitrification process and dephosphorization process all need to consume carbon source.Traditional sewage treatment process is with certain denitrogenation and dephosphorization function, and traditional sewage treatment process has A
2/ O, improvement A
2/ O, UCT and SBR, but owing to there is the contradiction of carbon source competition and mud difference in age in denitrogenation and dephosphorization process microorganism, the mutual restriction of the condition of dephosphorization and denitrogenation in same environmental system, actual motion is difficult to meet the water quality requirement day by day improved.
Because in single sludge system, polyP bacteria, denitrifying bacteria, nitrifier etc. coexist in same active sludge, inevitably there is mud contradiction in age between nitrifier and dephosphorization bacterial and denitrifying bacteria and polyP bacteria 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.Although the distortion of some techniques can make up single sludge system deficiency in a certain respect to a certain extent, be difficult to meet the water quality requirement day by day improved in engineering practice.In order to make up the deficiency of single sludge system, double sludge denitrification dephosphorization system arises at the historic moment.Two sludge system is grown independent of in the reactor of two nitrobacteria and Denitrifying Phosphate Accumulating Organisms, connected by two reactors, to realize the circulation of nitrification liquid by pipeline.Eliminating finally by rich phosphorous sludge realizes dephosphorization.Two sludge system creates two quasi-microorganisms growing environment good separately; improve Nitrogen/Phosphorus Removal; the mud-water separation poor effect of two sludge system usually can affect the water quality of water outlet, and two sludge system also exists the drawbacks such as number of reactors is many, pipeline is complicated, complex operation simultaneously.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, there is provided a kind of strengthening mud-water separation to detest/anoxic-membrane bioreactor denitrification dephosphorization technique, solve the mud-water separation poor effect of existing technique, number of reactors is many, pipeline is complicated, the problem of complex operation.
Technical scheme: the one strengthening mud-water separation realizing the object of the invention detests/anoxic-membrane bioreactor denitrification dephosphorization technique, comprise adjustment in use pond, detest/anoxic reacter, aerobic membrane bioreactor, sludge thickener, take the operation scheme of sequence batch (, synchronously carry out into water and aerobic membrane bioreactor membrane filtering drainage, by detesting/discharge of anoxic reacter rich phosphorous sludge realizes dephosphorization;
Whole technical process comprises: water inlet/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage, aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage and detest/anoxic reacter and aerobic membrane bioreactor spoil disposal three phases; Three phases comprises 6 processes, namely anaerobic phosphorus release process, aerobic membrane bioreactor drainage procedure, nitrifying process, Denitrifying Phosphorus Removal, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal process, wherein anaerobic phosphorus release process and aerobic membrane bioreactor drainage procedure synchronously carry out, aerobic nitrification process and anoxic denitrification dephosphorization course synchronization carry out, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal course synchronization carry out;
Described water inlet/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage: intake pump the sewage in equalizing tank is pumped into from bottom detest/anoxic reacter in carry out anaerobic phosphorus release; Meanwhile, detest/anoxic reacter in due to upwards plug-flow and the support effect of bottom water inlet, make top enter aerobic membrane bioreactor through the supernatant liquor spilling gravity flow of the further mud-water separation of triphase separator; By the built-in membrane module of aerobic membrane bioreactor, utilize and recycle water pump suction function, realized the outside filtration draining of system by the closedown of circulation valve, the unlatching of water discharging valve;
Described aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage comprise: two processes that aerobic nitrification circulates and anoxic denitrification dephosphorization circulates, and two course synchronization carry out;
Described aerobic nitrification working cycle: comprise and open gas blower, detest/anoxic reacter in mixed solution realize mud-water separation by triphase separator, through cyclic water outlet overflow weir gravity flow enter aerobic membrane bioreactor, carry out aerobic nitrification and degradation of organic substances;
Described anoxic denitrification dephosphorization working cycle: comprise and open circulation valve, by circular water discharging pump the mixed solution in aerobic membrane bioreactor by aerobic membrane bioreactor membrane module filtration cycle to detesting/anoxic reacter in carry out anoxic denitrification and inhale phosphorus;
Described to detest/anoxic reacter and aerobic membrane bioreactor spoil disposal stage: by detesting/anoxic reacter spoil disposal valve become reconciled the unlatching of aerobic membrane bioreactor spoil disposal valve utilize hydrostaticpressure respectively detesting/anoxic reacter in phosphorus containing sludge and excess sludge in aerobic membrane bioreactor drain in sludge thickener and carry out concentration.
Beneficial effect: the present invention by detesting/anoxic reacter in triphase separator is set, in aerobic membrane bioreactor, membrane module is set, take anaerobic supernatant overflow water outlet oxygen nitrification liquid of becoming reconciled to filter the operation scheme of water outlet synchronised recycling, aerobic nitrification and the anoxic denitrification dephosphorization process in two reactors of achieving synchronously is carried out respectively.Utilize detesting/anoxic reacter in triphase separator be set realize muddy water high efficiency separation, eliminate mud-water separation unit in traditional technology, enhance the stability of system cloud gray model; Membrane module is set in Aerobic Pond and achieves the effect that muddy water in Aerobic Pond is almost separated completely, nitrobacteria and polyP bacteria is made to be trapped in aerobic membrane bioreactor and detesting/anoxic reacter respectively, 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; Water inlet and film filtration effluent synchronously carry out, and aerobic nitrification and anoxic denitrification dephosphorization are synchronously carried out, and shorten the cycle of operation, improve system processing efficiency.
This technique detesting/anoxic reacter in triphase separator be set replace traditional intermediate processing, improve mud-water separation efficiency and save the time, reduce working time, apply the drawback that triphase separator avoids traditional technology mud-water separation poor effect simultaneously, improve the stability of system cloud gray model, save power.In aerobic membrane bioreactor, arranging membrane module due to the souring of aeration makes film not easily block, and life cycle extends greatly.Because system is from aerobic membrane bioreactor water outlet, simultaneously the separating effect of film stability and high efficiency can ensure effluent quality, simultaneously for detest anoxic reacter inter-sync water inlet provide condition.This technique can realize efficient mud-water separation, just provide guarantee for the operation of two sludge system, nitrobacteria and polyP bacteria are divided the envrionment conditions grown in respective system, efficiently solve in dephosphorization and denitrification process the contradiction of carbon source competition and mud contradiction in age, achieve a carbon dual-purpose, save carbon source, enhance the denitrification dephosphorization usefulness of low-carbon-source sewage.Its technique has the advantages such as flow process is simple, the cycle of operation is short, biological concentration is high, floor space is little, effluent quality is good, convenient operation and management.To the exploitation of sewage treatment technique and the upgrading of existing sewage work, there is great importance.
Triphase separator is applied to detest/anoxic pond to be to realize mud-water separation, utilize the crown_interception of film to realize mud-water separation simultaneously, create two kinds of each self-growing environment of microorganism, efficiently solve the problem of mud-water separation, ensured effluent quality problem, more two sludge system, this process reactor number is less, pipeline is comparatively simple, and operational administrative is more convenient.
Accompanying drawing explanation
Fig. 1 is that strengthening mud-water separation of the present invention detests/anoxic-membrane bioreactor denitrification dephosphorization technique schema.
In figure: 1, equalizing tank; 2 ,/anoxic reacter is detested; 3, aerobic membrane bioreactor; 4, sludge thickener; 5, circular water discharging pump; 6, gas blower; 7, triphase separator; 8, overflow weir; 9, water discharging valve; 10, circulation valve; 11 ,/anoxic reacter spoil disposal valve is detested; 12, aerobic membrane bioreactor spoil disposal valve; 13, aerobic membrane bioreactor membrane module; 14, intake pump.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described:
The present invention strengthens mud-water separation and detests/and anoxic-membrane bioreactor denitrification dephosphorization technique disposes of sewage, and adopt equalizing tank (1), detest/anoxic reacter (2), aerobic membrane bioreactor (3), sludge thickener (4).Be equipped with triphase separator (7) for mud-water separation detesting in/anoxic reacter (2), be built-in with membrane module (13) good membrane bioreactor (3), for circulation and the system film filtration effluent of nitrification liquid; Rinsed with controlling diaphragm pollution face by gas blower (6) aeration in aerobic membrane bioreactor, aeration also plays the effect to microorganism oxygen supply simultaneously.By detesting/anoxic reacter spoil disposal valve (11), the opening and closing of aerobic membrane bioreactor spoil disposal valve (12) regulates and controls spoil disposal to realize the removal of phosphorus, and carries out sludge condensation process.
Adopt the operation scheme of sequence batch (, carry out into water/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage successively, aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage and detest/anoxic reacter and aerobic membrane bioreactor spoil disposal three phases, three phases comprises 6 processes, i.e. anaerobic phosphorus release process, aerobic membrane bioreactor drainage procedure, nitrifying process, Denitrifying Phosphorus Removal, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal process, wherein anaerobic phosphorus release process and aerobic membrane bioreactor drainage procedure synchronously carry out, aerobic nitrification process and anoxic denitrification dephosphorization course synchronization carry out, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal course synchronization carry out, three phases is a cycle of operation.
Carrying out practically process:
Water inlet/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage: by intake pump (14) sewage in equalizing tank (1) pumped into from bottom to detest in/anoxic reacter (2) and carry out anaerobic phosphorus release and absorb into the organism water, save as next stage anoxic denitrification and inhale carbon source needed for phosphorus; Meanwhile, detesting the interior upwards plug-flow due to bottom water inlet of/anoxic reacter (2) and support effect, making top overflow from flowing into aerobic membrane bioreactor (3) through the supernatant liquor of the further mud-water separation of triphase separator; Realized the outside filtration draining of system by circular water discharging pump (5) by the built-in membrane module of aerobic membrane bioreactor;
Aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage: this stage comprises two biological respinses, i.e. aerobic nitrification and anoxic denitrification dephosphorization, respectively aerobic membrane bioreactor with detest/anoxic reacter in carry out, two course synchronization carry out.
1. aerobic nitrification working cycle: comprise and start gas blower (6), start circular water discharging pump (5), open circulation valve (10), by triphase separator (7) the mud-water separation of detesting in/anoxic reacter (2), supernatant liquor by detesting/anoxic reacter cyclic water outlet overflow weir (8) carries out aerobic nitrification and organic substance decomposing by flow by gravity to aerobic membrane bioreactor (3);
2. anoxic denitrification dephosphorization process: comprise and open circulation valve (10), by circular water discharging pump (5) the active sludge supernatant liquor in aerobic membrane bioreactor (3) by Aerobic Pond membrane module (13) be circulated to detest in/oxygen reactor (2) carry out anoxic denitrification inhale phosphorus.
Detest/anoxic reacter and aerobic membrane bioreactor spoil disposal stage: detest/unlatching of anoxic reacter spoil disposal valve (11) and aerobic membrane bioreactor mud valve door (12) utilize hydrostaticpressure respectively detesting/anoxic reacter in excess sludge in the phosphorus containing sludge of (2) and aerobic membrane bioreactor (3) drain in sludge thickener (4) and carry out concentration.
This technique adopts the operation scheme of sequence batch (, sewage first enter detest/anoxic reacter carries out the absorption of anaerobic phosphorus release and small organic molecule, sewage from detesting/anoxic reacter bottom enter, under the upwards plug-flow effect of water inlet, supernatant liquor starts overflow and enters aerobic membrane bioreactor, and aerobic membrane bioreactor carries out filtration water outlet by membrane module simultaneously; Water inlet oxygen/anaerobic phosphorus release terminates the rear beginning nitrification and denitrification dephosphorization Two-way Cycle stage, by circular water discharging pump the nitrification liquid in aerobic membrane bioreactor is back to detest/anoxic reacter carries out denitrifying phosphorus uptake, detest simultaneously/anoxic reacter in mixed solution under the centrifugation of triphase separator, realize mud-water separation, supernatant liquor gravity flow carries out nitration reaction to aerobic membrane bioreactor, in aerobic membrane bioreactor, pass through gas blower aeration to microorganism oxygen supply, aeration also plays and rinses the effect of polluting with controlling diaphragm to face; Finally open detest/anoxic reacter spoil disposal valve become reconciled aerobic membrane bioreactor spoil disposal valve utilize hydrostaticpressure respectively detesting/anoxic membrane reactor in phosphorus containing sludge and excess sludge in aerobic membrane bioreactor drain in sludge thickener and carry out concentration.Next cycle is entered after spoil disposal terminates.The whole service cycle is 4-8h, wherein water inlet/anaerobic phosphorus release/draining 1-2h, aerobic nitrification and denitrification dephosphorization Two-way Cycle 2-4h, spoil disposal 0.2-1.0h.
Claims (1)
1. a strengthening mud-water separation detests/anoxic-membrane bioreactor denitrification dephosphorization technique, comprise equalizing tank (1), detest/anoxic reacter (2), aerobic membrane bioreactor (3), sludge thickener (4), take the operation scheme of sequence batch (, synchronously carry out into water and aerobic membrane bioreactor membrane filtering drainage, by detesting/discharge of anoxic reacter rich phosphorous sludge realizes dephosphorization;
It is characterized in that: adopt the detesting of built-in triphase separator/anoxic reacter and membrane bioreactor to form two sludge system, with intensified denitrification and dephosphorization function; Whole technical process comprises: water inlet/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage, aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage and detest/anoxic reacter and aerobic membrane bioreactor spoil disposal three phases; Three phases comprises 6 processes, namely anaerobic phosphorus release process, aerobic membrane bioreactor drainage procedure, nitrifying process, Denitrifying Phosphorus Removal, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal process, wherein anaerobic phosphorus release process and aerobic membrane bioreactor drainage procedure synchronously carry out, nitrifying process and Denitrifying Phosphorus Removal synchronously carry out, detest/anoxic reacter spoil disposal process and aerobic membrane bioreactor spoil disposal course synchronization carry out;
Described water inlet/anaerobic phosphorus release and aerobic membrane bioreactor membrane filtering drainage stage are pumped into from bottom to detest in/anoxic reacter (2) by the sewage in equalizing tank (1) by intake pump (14) to carry out anaerobic phosphorus release; Detesting the interior upwards plug-flow due to bottom water inlet of/anoxic reacter (2) and support effect simultaneously, making top overflow from flowing into aerobic membrane bioreactor (3) through the supernatant liquor of the further mud-water separation of triphase separator; And realize filtering water outlet by the membrane module (13) in aerobic membrane bioreactor;
Described aerobic nitrification and anoxic denitrification dephosphorization Two-way Cycle stage comprise: two processes that aerobic nitrification circulates and anoxic denitrification dephosphorization circulates, and two course synchronization carry out;
Described aerobic nitrification working cycle: detest/anoxic reacter in mixed solution by triphase separator (7) realize detest/anoxic reacter (2) mud-water separation, enter aerobic membrane bioreactor (3) through overflow weir (8) gravity flow, carry out aerobic nitrification and degradation of organic substances;
Described anoxic denitrification dephosphorization working cycle: comprise and open circulation valve (10), is realized the mixed solution in aerobic membrane bioreactor (3) mud-water separation and is circulated to detest in/anoxic reacter (2) carrying out anoxic denitrification suction phosphorus by membrane module (13) filtration by circular water discharging pump (5);
Described to detest/anoxic reacter and aerobic membrane bioreactor spoil disposal stage be detest by opening/anoxic reacter spoil disposal valve (11) and aerobic membrane bioreactor mud valve door (12) drain into the excess sludge in the phosphorus containing sludge detested in/anoxic reacter (2) and aerobic membrane bioreactor (3) in sludge thickener (4) respectively and carry out concentration.
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Cited By (4)
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| CN107399819A (en) * | 2017-08-22 | 2017-11-28 | 广西融誉建设项目科技咨询有限公司 | A kind of energy saving integrated film biological treatment device and method |
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| CN111847773A (en) * | 2020-07-10 | 2020-10-30 | 珠海九通水务股份有限公司 | Sewage treatment process based on multifunctional pool |
| CN114105301A (en) * | 2021-12-06 | 2022-03-01 | 北京工业大学 | Device and method for realizing efficient denitrification of low C/N sewage by enhancing endogenous denitrification through anoxic MBR (membrane bioreactor) |
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