CN101381156A - Sewage disposal system combining membrane bioreactor and phosphorus recovery and processing method - Google Patents
Sewage disposal system combining membrane bioreactor and phosphorus recovery and processing method Download PDFInfo
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Abstract
The invention discloses a sewage disposal system and a sewage disposal method for combination of a membrane reactor and phosphor recovery. The system comprises a biological treatment subsystem and a phosphor recovery subsystem, wherein the biological treatment subsystem is formed by connecting an anoxic tank and a membrane reactor; a sewage inlet of the anoxic pond is connected with a sewage supply pipe for introducing sewage to be treated; the phosphor recovery subsystem is formed by connecting a mixed tank, an anaerobic phosphor release tank, a mixed reaction tank and a settling tank in turn; and a sludge miscible liquor outlet of the membrane bioreactor of the biological treatment subsystem is communicated with a water inlet of the mixed tank of the phosphor recovery subsystem. The system solves the problem that the sludge age required for biological denitrogenation and dephosphorization in the prior sewage disposal system is conflicted with each other, and can meet the demand of not only effectively performing denitrogenation and dephosphorization but also recovering phosphor for reutilization to the maximum degree under the condition of sewage disposal.
Description
Technical field
The present invention relates to a kind of sewage disposal technology, relate in particular to a kind of membrane bioreactor (MBR) that utilizes and reclaim Sewage treatment systems and the treatment process that technology combines with phosphorus.
Background technology
Phosphorus is the important factor of body eutrophication, also is to be close to unidirectional round-robin element at nature, because the exploitation of phosphorus ore and phosphorus are close to unidirectional circulation at occurring in nature, phosphor resource is exhausted day by day.Adopt suitable treatment process and effective recovery method, not only can effectively control the eutrophication of water body, can also obtain available phosphor resource, to significance is arranged the working life that prolongs phosphate rock resource.Remove phosphorus nutrition object space method in the existing technology and mainly contain three kinds, be i.e. chemical method, biological process and biochemical process.Effectively dephosphorization of chemical method, but produce a large amount of chemical sludges, be difficult to dispose, make its range of application limited.The biological process dephosphorization is to utilize the consumption of microorganism to phosphorus, carries out the removal of phosphorus by the method for getting rid of excess sludge, but the excess sludge of discharging is if miscarriage can cause secondary pollution to environment.Biochemical process is the active sludge in the biological treatment under anaerobic to be produced phosphate use add chemical agent phosphorus is removed.The biochemical process dephosphorization process mainly contains two classes, i.e. effluent dephosphorization and main flow dephosphorization.The effluent dephosphorization process mainly is that the part active sludge in the second pond is introduced in the anaerobic phosphorus releasing pool, and the P releasing tank supernatant liquor adds chemical agent and carries out dephosphorization, and the main flow dephosphorization process adopts anaerobic-aerobic alternate run technology, thereby improves phosphor-removing effect.The contriver finds that in the biological chemistry dephosphorization process, biological phosphate-eliminating partly adopts traditional activated sludge process on the one hand, the treatment effect instability, and effluent quality is affected; The chemical sludge that produced of chemical dephosphorization part can not be recycled on the other hand, causes the waste of phosphor resource, and chemical sludge deals with improperly, still can cause environmental pollution.
Summary of the invention
Embodiment of the present invention provides a kind of membrane bioreactor and phosphorus to reclaim bonded Sewage treatment systems and treatment process, can effectively handle the pollution substance in the water body, save the settling tank in the traditional technology, and can the phosphorus of removing in the water body be reclaimed, overcome the shortcoming of the phosphorus serious waste in existing sewage treatment process denitrogenation processing poor effect and the sewage.
The objective of the invention is to be achieved through the following technical solutions:
A kind of membrane bioreactor of embodiment of the present invention and phosphorus reclaim the bonded Sewage treatment systems, and this system comprises:
Biological treatment subsystem and phosphorus reclaim subsystem; Described biological treatment subsystem is formed by connecting by anoxic pond and membrane bioreactor, and the sewage inlet of anoxic pond is connected with the sewage supply pipe that introducing is disposed of sewage; Described phosphorus reclaims subsystem and is connected in sequence by mixing pit, anaerobic phosphorus releasing pool, mixed reaction pond, settling tank;
The mud mixed liquid water outlet of the membrane bioreactor of described biological treatment subsystem is communicated with the water-in that described phosphorus reclaims the mixing pit of subsystem.
Described membrane bioreactor comprises:
Blast main, hyperfiltration membrane assembly and filter back water rising pipe, mud mixed liquid water outlet; Described blast main and mud mixed liquid water outlet all are arranged on the membrane bioreactor body, and with the membrane bioreactor internal communication, described hyperfiltration membrane assembly is arranged in the membrane bioreactor, are connected with filter back water rising pipe on the hyperfiltration membrane assembly.
Also be provided with the mixed-liquor return pipe between described membrane bioreactor and the anoxic pond, described mixed-liquor return pipe one port is arranged on the membrane bioreactor body, and with the membrane bioreactor internal communication, the another port is connected with the sewage inlet of described anoxic pond.
Described phosphorus reclaims subsystem and also comprises:
The backflow well which is provided with water-in and water port, and water-in is communicated with described settling tank water port and the mud relief outlet of releasing the phosphorus settling tank respectively, and described water port is returned the sewage inlet of the anoxic pond that is connected to described biological treatment subsystem by pipeline.
The water-in that described phosphorus reclaims the mixing pit of subsystem is connected with the sewage supply pipe that introducing is disposed of sewage.
The water-in of described mixed reaction pond is provided with dephosphorization agent and adds inlet.
Described settling tank bottom is provided with the mud relief outlet that is used to discharge phosphorous chemical sludge.
A kind of above-mentioned every described in the treatment process of system, this method comprises:
The sewage of handling enters the biological treatment subsystem and handles, in anoxic pond, carry out denitrification denitrogenation and remove partial organic substances, sewage after anoxic pond is handled enters and carries out continuous aeration in the membrane bioreactor and carry out nitration reaction and organic matter degradation under good oxygen condition, sewage after the processing is discharged as good water after hyperfiltration membrane assembly filters, and contains the higher mud mixed liquid of phosphorus concentration and enters phosphorus recovery subsystem;
The mud mixed liquid of in phosphorus reclaims the mixing pit of subsystem described membrane bioreactor being discharged mixes with part of contaminated water, make the nitric nitrogen that exists in the mixed solution in the mixing pit of anoxic condition, carry out denitrification, the mixed mud of mixing pit enters the release that anaerobic phosphorus releasing pool is carried out phosphorus, the phosphorous supernatant liquor that obtains enters mixed reaction pond and releases phosphorus sludge, the described phosphorus sludge part of releasing is as excess sludge discharge, and a part is back to the biological treatment subsystem and takes the photograph phosphorus again; Described phosphorous supernatant liquor enters in the mixed reaction pond and reacts with the dephosphorization agent thorough mixing that adds, enter and carry out mud-water separation in the settling tank, the separated liquid supernatant pump around circuit is handled once more, and the isolated chemical sludge of settling tank is recycled as the starting material of phosphorous chemical industry.
Described separated liquid supernatant pump around circuit is handled once more and is comprised:
The part of separated liquid supernatant in the settling tank and anaerobic phosphorus releasing pool bottom released in phosphorus sludge is back to the biological treatment subsystem by the backflow well the anoxic pond handle once more.
Described method also comprises:
Introduce untreated sewage at the water-in of mixing pit, carry out the anaerobic phosphorus release process in anaerobic phosphorus releasing pool carbon source is provided for follow-up.
The technical scheme that is provided by the invention described above embodiment as can be seen, pass through to adopt the second pond in the membrane bioreactor replacement traditional technology system in the embodiment of the present invention, and set up phosphorus and reclaim subsystem, the high phosphorus containing sludge that biological treatment is produced is released phosphorus in the anaerobic phosphorus release of phosphorus recovery subsystem, improve and to release the phosphorus effect, also guarantee to greatest extent simultaneously in membrane bioreactor, to take the photograph phosphorus efficient; In the mixed reaction pond of phosphorus recovery subsystem, add dephosphorization agent, and carry out mud-water separation by settling tank, and finish the recovery of phosphorous chemical sludge, both guaranteed in the sewage treatment process removal to phosphorus, can well reclaim the phosphorus in the sewage again, for phosphorous chemical industry provides new phosphor resource; Solved biological denitrificaion and the conflicting problem of dephosphorization in the traditional wastewater treatment system, both effectively denitrogenation, dephosphorization in the time of can satisfying sewage disposal to greatest extent can be reclaimed so that utilize once more phosphorus again.
Description of drawings
Fig. 1 is the synoptic diagram of the Sewage treatment systems of the embodiment of the invention.
Among the figure: 1, sewage supply pipe; 2, anoxic pond; 21, anoxic pond agitator; 3, mixed-liquor return pipe; 4, membrane bioreactor; 5, hyperfiltration membrane assembly; 6, mixing pit; 61, mixing pit agitator; 7, release the phosphorus settling tank; 8, mixed reaction pond; 81, mixing pit reactor; 9, settling tank; 10, backflow well; A, blast main; C, dephosphorization agent add inlet; D, filter back water rising pipe; E, excess sludge; F, phosphorous chemical sludge.
Embodiment
The Sewage treatment systems that embodiment of the present invention provides is that the aerobic section in traditional A/O process system is improved to membrane bioreactor, removes second pond behind membrane bioreactor, and water outlet is directly discharging after hyperfiltration membrane assembly filters; And before carrying out anaerobic phosphorus release, in phosphorus recovery subsystem, increase mixing pit, mud in the membrane bioreactor is mixed in mixing pit with part of contaminated water, for the anaerobic phosphorus release process provides the carbon source that needs, simultaneously from the nitric nitrogen in the Aerobic Pond mixed solution also at this mixing pit (anoxic condition) thus in obtain denitrification and reduce nitric nitrogen is released phosphorus to biology influence to greatest extent; Add dephosphorization agent in mixed reaction pond, not only for removing the phosphoric acid salt in the water, can the phosphoric acid salt in the water be reclaimed simultaneously, the phosphorus supply chemical enterprise reuses as starting material.
For ease of understanding, describe below in conjunction with drawings and the specific embodiments.
Embodiment one
Present embodiment provides a kind of Sewage treatment systems of utilizing membrane bioreactor and phosphorus to reclaim and combine, and this system can denitrogenate sewage, dephosphorization the time, phosphorus is carried out efficient recovery, specifically as shown in Figure 1, comprising:
Biological treatment subsystem and phosphorus reclaim subsystem two portions; Wherein, described biological treatment subsystem is connected to form biological treatment section to sewage by anoxic pond 2 and membrane bioreactor 4, the sewage inlet of anoxic pond 2 with introduce the sewage supply pipe 1 of disposing of sewage and be connected; Described phosphorus reclaims subsystem and is in turn connected to form phosphorus recovery zone to sewage by mixing pit 6, anaerobic phosphorus releasing pool 7, mixed reaction pond 8, settling tank 9;
The mud mixed liquid water outlet of the membrane bioreactor 4 of described biological treatment subsystem is communicated with the formation Sewage treatment systems with the water-in that described phosphorus reclaims the mixing pit 6 of subsystem.
In the reality, for reaching better treatment effect, settling tank 9 back of reclaiming subsystem at phosphorus are provided with backflow well 10, water-in on the backflow well 10 is communicated with described settling tank 9 water port and the mud relief outlet of releasing phosphorus settling tank 7 respectively, water port on the backflow well 10 is returned on the sewage inlet of the anoxic pond 2 that is connected to the biological treatment subsystem by pipeline, so just, formed a recycle system, formation reaches the aerobic complete cycle of taking the photograph phosphorus, anaerobic phosphorus release on the one hand, can carry out circular treatment to the supernatant liquor after the dephosphorization on the one hand.
In the said system, described membrane biological reaction implement body comprises: blast main A, hyperfiltration membrane assembly 5 and filter back water rising pipe D, mud mixed liquid water outlet; Described blast main A and sewage outlet all are arranged on membrane bioreactor 4 bodies, and with membrane bioreactor 4 internal communication, described hyperfiltration membrane assembly 5 is arranged in the membrane bioreactor 4, are connected with filter back water rising pipe D on the hyperfiltration membrane assembly 5; Between described membrane bioreactor 4 and anoxic pond 2, also be provided with a mixed-liquor return pipe 3, one port of mixed-liquor return pipe 3 is arranged on membrane bioreactor 4 bodies, with membrane bioreactor 4 internal communication, the another port is connected with the sewage inlet of described anoxic pond 2.
For guaranteeing that phosphorus reclaims in the subsystem carbon source when sewage released phosphorus and handle, phosphorus is reclaimed subsystem mixing pit 6 water-in with introduce the sewage supply pipe 1 dispose of sewage and directly be connected guarantee carbon source in the mud mixed liquid in the mixing pit 6 so that from sewage supply pipe 1, directly introduce sewage without the subsystem processes of carrying out a biological disposal upon.
Wherein, the water-in of described mixed reaction pond 8 be provided with dephosphorization agent add the inlet C (dephosphorization agent can adopt lime).For reaching better mixing effect, anoxic pond agitator 21 is set in anoxic pond 2, mixing pit agitator 61 is set in mixing pit 6, mixed reaction pond agitator 81 is set in mixed reaction pond 8.
Can handle sewage by above-mentioned system, reach nitrogen and the phosphorus both removed in the sewage, the purpose that can well reclaim phosphorus realizes both environmental protection again, again the purpose that waste resource is utilized again.
Embodiment two
A kind of sewage water treatment method based on system described in the embodiment one is provided in the present embodiment, specifically comprises:
The sewage of handling enters the biological treatment subsystem and handles, in anoxic pond, carry out denitrification denitrogenation and remove partial organic substances, sewage after anoxic pond is handled enters and carries out continuous aeration in the membrane bioreactor and carry out nitration reaction and the partial organic substances degraded under good oxygen condition, sewage part after the processing is discharged as good water after hyperfiltration membrane assembly filters, and remaining sewage and mud enter phosphorus and reclaims subsystem;
The sewage and the mud of in phosphorus reclaims the mixing pit of subsystem described membrane bioreactor being discharged mix, make the nitric nitrogen that exists in the mixed solution in the mixing pit of anoxic condition, carry out earlier denitrification to eliminate the disadvantageous effect of nitric nitrogen to follow-up anaerobic phosphorus release, and introduce sewage without the biological treatment subsystem processes at the water-in of mixing pit, carry out the anaerobic phosphorus release process in anaerobic phosphorus releasing pool carbon source is provided for follow-up, the mixed mud of mixing pit enters the release that anaerobic phosphorus releasing pool is carried out phosphorus, the phosphorous supernatant liquor that obtains enters mixed reaction pond, the excess sludge E discharging of anaerobic phosphorus releasing pool bottom; Enter the dephosphorization agent thorough mixing reaction of interior phosphorous supernatant liquor of mixed reaction pond and adding, enter and carry out mud-water separation in the settling tank, separated liquid supernatant is back to circular treatment once more in the anoxic pond of biological treatment subsystem by the backflow well, the isolated phosphorous chemical sludge F of settling tank recycles as the starting material of phosphorous chemical industry.
Press the treating processes of sewage each several part in system, above-mentioned treatment process can specifically be divided into following a few step:
The first step: anoxic pond, the sewage of processing carries out denitrification denitrogenation in anoxic pond, removes a part of organism simultaneously, and this goes on foot at least 1 hour residence time;
Second step: membrane bioreactor MBR, in membrane bioreactor MBR, carry out continuous aeration, kept oxygen condition, the ammonia nitrogen in the sewage carries out nitration reaction, and organism is degraded, and sewage is discharged after hyperfiltration membrane assembly filters, and this goes on foot at least 3 hours residence time;
The 3rd step: mixing pit, the mud mixed liquid in the membrane bioreactor MBR pond mixes in mixing pit with raw waste water, and directly the raw waste water of introducing in mixing pit without any processing mainly is to provide required carbon source for anaerobic phosphorus releasing pool; Simultaneously from the nitric nitrogen in the Aerobic Pond mixed solution also at this mixing pit (anoxic condition) thus in obtain denitrification and reduce nitric nitrogen is released phosphorus to biology influence to greatest extent.The mixed mud of mixing pit enters anaerobic phosphorus releasing pool, and this goes on foot at least 0.5 hour residence time;
The 4th step: anaerobic phosphorus releasing pool, carry out the release of phosphorus in anaerobic phosphorus releasing pool, phosphorous supernatant liquor enters mixed reaction pond, the bottom excess sludge partly enters the backflow well and refluxes, part is as excess sludge discharge, the part that wherein refluxes is controlled according to the phosphorus total amount that reaches the needs recovery in the former water, and the quantity discharged of excess sludge is then controlled according to the sludge age of the biochemical system in the entire sewage treatment system (biological treatment subsystem).This goes on foot at least 2 hours residence time;
The 5th step: mixed reaction pond and settling tank, phosphorous supernatant liquor reacts with dephosphorization agent (dephosphorization agent can be selected lime for use) thorough mixing in the mixed precipitation pond, in settling tank, carry out mud-water separation, the settling tank supernatant liquor enters the backflow well and refluxes, the chemical sludge of bottom reclaims, as the starting material recycling of phosphorous chemical industry, this goes on foot at least 0.5 hour residence time.
In the reality, after the sewage of preparing to handle is at first handled through pre-treatment facilities such as coarse rack, fine fack and settling pits, enter in the Sewage treatment systems of the embodiment of the invention, the operation scheme that native system adopts anoxic pond and membrane bioreactor (MBR) to combine is removed pollutent in the sewage.Membrane bioreactor (MBR) technology organically combines traditional biological process and membrane separation technique, and has replaced the second pond in the traditional activated sludge process, makes aeration tank and settling tank unite two into one, and has saved construction land; Membrane bioreactor (MBR) technology can realize the independent control of solid retention time, is that the macromolecular organism of difficult degradation in the sewage can have enough residence time in reactor, reaches final removal purpose; Membrane bioreactor (MBR) technology can make the qualified discharge of stable effluent quality.
Water after handling in membrane bioreactor (MBR) is by the ultra-filtration membrane qualified discharge, mud mixture in the pond enters in the mixing pit and mixes with the part raw waste water, mainly be to release the phosphorus process for the sludge anaerobic of next stage carbon source is provided, enter anaerobic phosphorus releasing pool through the mixed mud mixture of mixing pit;
In anaerobic phosphorus releasing pool, keep dissolved oxygen concentration to be lower than 0.5mg/L, solid (sludge part) residence time is 4～6h, purpose is that the phosphorus of excessive absorption in the mud can be discharged fully, the supernatant liquor that obtains in the anaerobic phosphorus releasing pool enters mixed reaction pond, the bottom sludge part enters the backflow well, part enters the mud storage pool as excess sludge, and finally outward transport is disposed after sludge dewatering treatment.The quantity discharged of excess sludge is controlled according to the sludge age (being generally 11～23 days) of whole biochemical system, if the biochemical system sludge age is 20 days, then the quantity discharged of excess sludge is 1/20th (inverse of sludge age) of the total mud amount of biochemical system;
In mixed reaction pond, rich phosphorus sewage and the dephosphorization agent reaction that joins in the mixed reaction pond should be controlled the interior pH value of reaction tank this moment for alkalescence, to help phosphatic precipitation;
Mud mixture in the mixed reaction pond enters settling tank and carries out mud-water separation, and the supernatant liquor in the settling tank enters the backflow well, and the phosphorous chemical sludge in bottom is collected, and handles through thickening and recycles as the starting material of phosphorous chemical industry enterprise;
In the backflow well, release being back in the anoxic pond of Sewage treatment systems after supernatant liquor in phosphorus settling tank bottom mud and the settling tank mixes, enter the next round circular treatment.
Through above-mentioned treating processes, just finished and utilized membrane bioreactor to reclaim the process that technology combines sewage disposal with phosphorus.The silt that grid slag that coarse rack, fine fack produce during to processing and sand separator produce can be transported outward disposal, and overflowing liquid and plant area's sanitary sewage that the filtrate that sludge treatment produces, mud storage pool produce enter in the water collecting basin together, again processing.
In sum, replace second pond in the traditional wastewater treatment system with membrane bioreactor MBR in the embodiment of the invention, and set up phosphorus and reclaimed technology, anaerobic phosphorus release and chemical dephosphorization that membrane bioreactor (MBR) and its outside are set up separately combine, and reach the dephosphorization ability of strengthening total system and the effect that phosphorus is reclaimed.Do not discharge excess sludge among the membrane bioreactor MBR, mud discharges after all entering and releasing phosphorus in the anaerobic phosphorus releasing pool again, and main purpose is that phosphor resource is fully reclaimed, and reduces the too high secondary pollution that brings of phosphorus content in the discharging excess sludge.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1, a kind of membrane bioreactor and phosphorus reclaim the bonded Sewage treatment systems, it is characterized in that this system comprises:
Biological treatment subsystem and phosphorus reclaim subsystem; Described biological treatment subsystem is formed by connecting by anoxic pond (2) and membrane bioreactor (4), and the sewage inlet of anoxic pond (2) is connected with the sewage supply pipe (1) that introducing is disposed of sewage; Described phosphorus reclaims subsystem and is connected in sequence by mixing pit (6), anaerobic phosphorus releasing pool (7), mixed reaction pond (8), settling tank (9);
The mud mixed liquid water outlet of the membrane bioreactor of described biological treatment subsystem (4) is communicated with the water-in that described phosphorus reclaims the mixing pit (6) of subsystem.
2, system according to claim 1 is characterized in that, described membrane bioreactor comprises:
Blast main (A), hyperfiltration membrane assembly (5) and filter back water rising pipe (D), mud mixed liquid water outlet; Described blast main (A) and mud mixed liquid water outlet all are arranged on membrane bioreactor (4) body, with membrane bioreactor (4) internal communication, described hyperfiltration membrane assembly (5) is arranged in the membrane bioreactor (4), is connected with filter back water rising pipe (D) on the hyperfiltration membrane assembly (5).
3, system according to claim 1, it is characterized in that, also be provided with mixed-liquor return pipe (3) between described membrane bioreactor (4) and the anoxic pond (2), described mixed-liquor return pipe (3) one ports are arranged on membrane bioreactor (4) body, with membrane bioreactor (4) internal communication, the another port is connected with the sewage inlet of described anoxic pond (2).
4, system according to claim 1 is characterized in that, described phosphorus reclaims subsystem and also comprises:
Backflow well (10), which is provided with water-in and water port, water-in is communicated with described settling tank (9) water port and the mud relief outlet of releasing phosphorus settling tank (7) respectively, and described water port is returned the sewage inlet of the anoxic pond (2) that is connected to described biological treatment subsystem by pipeline.
5, system according to claim 1 is characterized in that, the water-in that described phosphorus reclaims the mixing pit (6) of subsystem is connected with the sewage supply pipe (1) that introducing is disposed of sewage.
6, system according to claim 1 is characterized in that, the water-in of described mixed reaction pond (8) is provided with dephosphorization agent and adds inlet (C).
7, system according to claim 1 is characterized in that, described settling tank (9) bottom is provided with the mud relief outlet that is used to discharge phosphorous chemical sludge.
8, a kind of treatment process based on claim 1～7 system described in each, it is characterized in that: this method comprises:
The sewage of handling enters the biological treatment subsystem and handles, in anoxic pond, carry out denitrification denitrogenation and remove partial organic substances, sewage after anoxic pond is handled enters and carries out continuous aeration in the membrane bioreactor and carry out nitration reaction and organic matter degradation under good oxygen condition, sewage after the processing is discharged as good water after hyperfiltration membrane assembly filters, and contains the higher mud mixed liquid of phosphorus concentration and enters phosphorus recovery subsystem;
The mud mixed liquid of in phosphorus reclaims the mixing pit of subsystem described membrane bioreactor being discharged mixes with part of contaminated water, make the nitric nitrogen that exists in the mixed solution in the mixing pit of anoxic condition, carry out denitrification, the mixed mud of mixing pit enters the release that anaerobic phosphorus releasing pool is carried out phosphorus, obtain phosphorous supernatant liquor and release phosphorus sludge, the described phosphorus sludge part of releasing is as excess sludge discharge, and a part is back to the biological treatment subsystem and takes the photograph phosphorus again; Described phosphorous supernatant liquor enters in the mixed reaction pond and reacts with the dephosphorization agent thorough mixing that adds, enter and carry out mud-water separation in the settling tank, the separated liquid supernatant pump around circuit is handled once more, and the isolated chemical sludge of settling tank is recycled as the starting material of phosphorous chemical industry.
9, method according to claim 8 is characterized in that, described separated liquid supernatant pump around circuit is handled once more and comprised:
The part of separated liquid supernatant in the settling tank and anaerobic phosphorus releasing pool bottom released in phosphorus sludge is back to the biological treatment subsystem by the backflow well the anoxic pond handle once more.
10, method according to claim 8 is characterized in that, described method also comprises:
Introduce untreated sewage at the water-in of mixing pit, carry out the anaerobic phosphorus release process in anaerobic phosphorus releasing pool carbon source is provided for follow-up.
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| CN2008101027148A CN101381156B (en) | 2008-03-25 | 2008-03-25 | Sewage disposal system combining membrane bioreactor and phosphorus recovery and processing method |
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| CN101870540A (en) * | 2010-05-26 | 2010-10-27 | 北京伊普国际水务有限公司 | System and method for treating nitrogen and phosphorus in urban sewage |
| CN102267783A (en) * | 2011-07-05 | 2011-12-07 | 北京伊普国际水务有限公司 | Dephosphorizing and denitrifying method and system for sewage |
| CN102372391A (en) * | 2010-08-13 | 2012-03-14 | 中国石油化工股份有限公司 | Method and system for removing phosphorous in high-calcium content sewage through combination of biological method and chemical method |
| CN102381801A (en) * | 2010-08-30 | 2012-03-21 | 中国石油化工股份有限公司 | Method for treating waste water by membrane bioreactor |
| CN102442750A (en) * | 2011-12-31 | 2012-05-09 | 北京汉青天朗水处理科技有限公司 | Sewage treatment systems and method |
| CN103058470A (en) * | 2013-02-05 | 2013-04-24 | 江苏宝灵化工股份有限公司 | Bio-contact oxidation phosphorus removal process |
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| CN1417142A (en) * | 2001-11-08 | 2003-05-14 | 深圳市中兴环境工程技术有限公司 | Chemically reinforced biological phosphate-eliminating process |
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| CN101870540B (en) * | 2010-05-26 | 2013-01-23 | 北京伊普国际水务有限公司 | System and method for treating nitrogen and phosphorus in urban sewage |
| CN101870540A (en) * | 2010-05-26 | 2010-10-27 | 北京伊普国际水务有限公司 | System and method for treating nitrogen and phosphorus in urban sewage |
| CN102372391B (en) * | 2010-08-13 | 2013-12-25 | 中国石油化工股份有限公司 | Method and system for removing phosphorous in high-calcium content sewage through combination of biological method and chemical method |
| CN102372391A (en) * | 2010-08-13 | 2012-03-14 | 中国石油化工股份有限公司 | Method and system for removing phosphorous in high-calcium content sewage through combination of biological method and chemical method |
| CN102381801A (en) * | 2010-08-30 | 2012-03-21 | 中国石油化工股份有限公司 | Method for treating waste water by membrane bioreactor |
| CN102267783A (en) * | 2011-07-05 | 2011-12-07 | 北京伊普国际水务有限公司 | Dephosphorizing and denitrifying method and system for sewage |
| CN102442750A (en) * | 2011-12-31 | 2012-05-09 | 北京汉青天朗水处理科技有限公司 | Sewage treatment systems and method |
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