CN103803706A - Membrane bioreactor-based sewage treatment method - Google Patents
Membrane bioreactor-based sewage treatment method Download PDFInfo
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- CN103803706A CN103803706A CN201410076654.2A CN201410076654A CN103803706A CN 103803706 A CN103803706 A CN 103803706A CN 201410076654 A CN201410076654 A CN 201410076654A CN 103803706 A CN103803706 A CN 103803706A
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Abstract
The invention discloses a membrane bioreactor-based sewage treatment method. A treatment process comprises aerobic reaction treatment and biological reaction treatment, wherein sewage firstly passes through an aerobic reaction region for performing an aerobic reaction, sewage aerated by the aerobic reaction region enters an anaerobic reaction region through an aerobic water outlet pipe for membrane biological reaction, and air is discharged from the anaerobic reaction region by using the aerobic reaction region for washing and aerating a membrane assembly; meanwhile, an air blower is used for aerating the bottom of the membrane assembly to control the aeration rate so that the dissolved oxygen in a region inside the membrane assembly is 0.2-0.5 mg/L, and an anaerobic environment is treated. According to the sewage treatment method disclosed by the invention, after air reacts through an aerobic reaction region, the oxygen content is lower. The membrane assembly is in the anaerobic environment, thus the membrane assembly is prevented from forming an aerobiotic membrane bioreactor, the membrane pollution and blockage are reduced, the membrane flux is decreased, and the speed is lowered. In the anaerobic environment, phosphorus-accumulating bacteria are used for discharging phosphorus in a body into the sludge, the phosphorus is directly removed through gasification, and the phosphorus in sewage is discharged in a hydrogen phosphide manner.
Description
Technical field
The invention belongs to sewage treatment area, be specifically related to a kind of based on membrane bioreactor sewage water treatment method.
Background technology
Membrane bioreactor is a kind of representative water treatment device developing rapidly in recent years.It not only can replace the second pond of prior device, and can significantly improve effluent quality.
Current membrane bioreactor mostly is aerobic reaction, and aerating apparatus need to be provided below membrane module, produces aerobic reaction environment.Under aerobic reaction environment, the aerobic cenobium breeding cycle is short, dead fast, forms a large amount of phosphorous mud.Aerobic bacteria easily produces gluey cenobium, has very strong sticking power, seriously polluted to membrane module, easily stifled film.
Summary of the invention
The one that the present invention is directed to above-mentioned weak point and provide is based on membrane bioreactor sewage water treatment method, adopt low-oxygen aeration technique, make membrane module form anaerobic environment, avoid forming aerobic membrane bioreactor, reduce film and pollute, stop up, slow down the speed that membrane flux reduces.
A kind of based on membrane bioreactor sewage water treatment method, treating processes comprises aerobic reaction processing and membrane biological reaction processing;
Sewage enters aerobic reactor zone through sewage input tube, by bottom, aerobic reactor zone, the first aeration head is set aerobic reactor zone sewage is carried out to aerated reaction;
Sewage after the aeration of aerobic reactor zone enters anaerobic reaction district through outputted aerobic water pipe and carries out membrane biological reaction, and aerobic reactor zone exhausted air rinses aeration by the 4th aeration head to membrane module bottom after gas accelerator is accelerated; Blower outlet air carries out aeration by the second aeration head to membrane module bottom after by the second air-valve control air quantity, membrane module interior region dissolved oxygen is 0.2～0.5mg/L, open the second recoil valve and the 3rd recoil valve, close the first recoil valve and the 4th recoil valve, the sump pump that working barrel is crossed membrane module inter-process is delivered to reuse pool.
Preferably, membrane module (6) interior region lower end dissolved oxygen is 0.5mg/L.
Preferably, membrane module (6) interior region middle part dissolved oxygen is 0.3mg/L.
Preferably, membrane module (6) interior region upper end dissolved oxygen is 0.2mg/L.
Preferably, membrane module (6) is less than 0.2mg/L with exterior domain dissolved oxygen.
For improving automatic processing capabilities, treatment process of the present invention also comprises controller and dissolved oxygen analytic instrument, dissolved oxygen analytic instrument is for measuring the dissolved oxygen content of anaerobic reaction district sewage, dissolved oxygen analytic instrument is connected with controller signals, the second air-valve is connected with controller signals, controller records dissolved oxygen content control the second valve area by dissolved oxygen analytic instrument, makes anaerobic reaction district dissolved oxygen content be less than 0.2mg/L.
For improving the processing power to sewerage nitrogen and phosphor, membrane module sewage after treatment enters reuse water district after the nitrogen phosphorus in the natural Buddhist stone planar water in physics denitrogenation dephosphorizing district.
Measure the precipitation in anaerobic reaction district for alleviating, also comprise the first air-valve and the first aeration tube, blower outlet air by after the first air-valve control air quantity by the 3rd aeration head to anaerobic reaction district aeration, the 3rd aeration head arranges downwards.
Preferably, when aerobic reactor zone bottom arranges the first aeration head aerobic reactor zone sewage is carried out to aerated reaction, gas-water ratio is 10:1.
Of the present invention based on membrane bioreactor sewage water treatment method, independently aerobic reactor zone is set, air is after the reaction of aerobic reactor zone, and oxygen is consumed, and oxygen level is very low.The air that aerobic reactor zone is consumed oxygen enters anaerobic reaction district, and membrane module is carried out to aeration, avoids membrane module to form aerobic membrane bioreactor, reduces film and pollutes, stops up, slows down the speed that membrane flux reduces.
Of the present invention based on membrane bioreactor sewage water treatment method, the bacterial classification that anaerobism is advantage can be cultivated by anaerobic reaction district, eliminates phosphorus create conditions for anaerobic gas.In anaerobic environment, polyP bacteria is rejected to the phosphorus in body in mud, enters the anaerobic reaction of long sludge age, directly, by gasification dephosphorization, the phosphorus in sewage is discharged with phosphuret-(t)ed hydrogen.
Accompanying drawing explanation
The treatment unit schematic diagram using based on membrane bioreactor sewage water treatment method that Fig. 1 is invention.
Reference numeral: 101-the first air-valve, 102-the second air-valve, 103-the first aeration tube, 104-outputted aerobic water pipe, 105-the first aeration head, 106-the 3rd aeration head, 107-the second aeration head, 108-the 4th aeration head, 2-aerobic reactor zone, 3-sewage input tube, 4-anaerobic reaction district, 5-reuse pool, 6-membrane module, 7-physics denitrogenation dephosphorizing district, 8-working barrel, 901-dissolved oxygen analytic instrument, 902-the 4th recoil valve, 903-the second recoil valve, 904-the 3rd recoil valve, 905-the first recoil valve, 10-gas accelerator, 11-controller, 12-gas blower.
Embodiment
By reference to the accompanying drawings 1, a kind of based on membrane bioreactor sewage water treatment method, treating processes comprises aerobic reaction processing and membrane biological reaction processing, sewage enters aerobic reactor zone 2 through sewage input tube 314, and 2 bottoms, aerobic reactor zone arrange the first aeration head 105 aerobic reactor zone 2 sewage are carried out to aerated reaction; Sewage after 2 aerations of aerobic reactor zone enters anaerobic reaction district 4 through outputted aerobic water pipe 104 and carries out membrane biological reaction, and aerobic reactor zone 2 exhausted airs rinse aeration by the 4th aeration head 108 to membrane module 6 bottoms after gas accelerator 10 is accelerated; Gas blower 12 air outlet air carry out aeration by the second aeration head 107 to membrane module 6 bottoms after controlling air quantity by the second air-valve 102, membrane module 6 interior region dissolved oxygens are 0.2～0.5mg/L, open the second recoil valve 903 and the 3rd recoil valve 904, close the first recoil valve 905 and the 4th recoil valve 902, the sump pump that working barrel 8 is crossed membrane module 6 inter-process is delivered to reuse pool 5.
Preferably, membrane module (6) interior region lower end dissolved oxygen is 0.5mg/L.
Preferably, membrane module (6) interior region middle part dissolved oxygen is 0.3mg/L.
Preferably, membrane module (6) interior region upper end dissolved oxygen is 0.2mg/L.
Preferably, membrane module (6) is less than 0.2mg/L with exterior domain dissolved oxygen.
For improving automatic processing capabilities, treatment process of the present invention also comprises controller 11 and dissolved oxygen analytic instrument 901, dissolved oxygen analytic instrument 901 is for measuring the dissolved oxygen content of anaerobic reaction district 4 sewage, dissolved oxygen analytic instrument 901 is connected with controller 11 signals, the second air-valve 102 is connected with controller 11 signals, controller 11 records dissolved oxygen content control the second air-valve 102 apertures by dissolved oxygen analytic instrument 901, makes anaerobic reaction district 4 dissolved oxygen contents be less than 0.2mg/L.
For improving the processing power to sewerage nitrogen and phosphor, membrane module 6 sewage after treatment enters reuse water district 5 after the nitrogen phosphorus in the natural Buddhist stone planar water in physics denitrogenation dephosphorizing district 7805.
For alleviating the precipitation of measuring anaerobic reaction district 4, also comprise the first air-valve 101 and the first aeration tube 103, gas blower 12 air outlet air are controlled after air quantity by the 3rd aeration head 106 anaerobic reaction district 4 aerations by the first air-valve 101, and the 3rd aeration head 106 arranges downwards.
Preferably, when 2 bottoms, aerobic reactor zone arrange the first aeration head 105 aerobic reactor zone 2 sewage are carried out to aerated reaction, gas-water ratio is 10:1.
Of the present invention based on membrane bioreactor sewage water treatment method, sewage carries out pre-treatment by pretreating zone, cross the floating matter filtering in sewage, by falling silt in pond sedimentation sewage etc., sewage is inputted aerobic reactor zone 2 by sewage input tube 3, the air providing by the first aeration head 105 carries out aerobic aeration reaction, sewage after 2 aerations of aerobic reactor zone enters anaerobic reaction district 4 through outputted aerobic water pipe 104 and carries out membrane biological reaction, aerobic reactor zone 2 exhausted airs rinse aeration by the 4th aeration head 108 to membrane module 6 bottoms after gas accelerator 10 is accelerated, air enters anaerobic reaction district 4 after by aerobic zone again, during to membrane module 6 aeration, oxygen level is extremely low, 6 of membrane modules are played to washing action, not for membrane module 6 biological respinses provide dissolved oxygen.Simultaneously, gas blower 12 air outlet air carry out aeration by the second aeration head 107 to membrane module 6 bottoms after by the second air-valve 102, control the air quantity of the second air-valve 102, making membrane module 6 interior region dissolved oxygens is at 0.2～0.5mg/L, open the second recoil valve 903 and the 3rd recoil valve 904, close the first recoil valve 905 and the 4th recoil valve 902, the sump pump that working barrel 8 is crossed membrane module 6 inter-process is delivered to reuse pool 5.
For improving automatic processing capabilities, treatment process of the present invention also comprises controller 11 and dissolved oxygen analytic instrument 901, dissolved oxygen analytic instrument 901 is for measuring the dissolved oxygen content of anaerobic reaction district 4 sewage, dissolved oxygen analytic instrument 901 is connected with controller 11 signals, the second air-valve 102 is connected with controller 11 signals, controller 11 records dissolved oxygen content control the second air-valve 102 apertures by dissolved oxygen analytic instrument 901, makes anaerobic reaction district 4 dissolved oxygen contents be less than 0.2mg/L.Anaerobic reaction district 4 is anaerobic reaction environment, avoids forming aerobic membrane bioreactor, reduces film and pollutes, stops up, slows down the speed that membrane flux reduces.After sewage aerobic reaction zone 2 and anaerobic reaction district 4 processes, decompose, oxidation colloid and dissolved organic matter matter, remove the goods and materials such as BOD5, COD in water, ammonia nitrogen, phosphorus, suspended substance, colourity.
Membrane module 6 sewage after treatment, can be further except the pollutent such as nitrogen, phosphorus in decontaminated water after the natural Buddhist stone absorption in physics denitrogenation dephosphorizing district 7.
Of the present invention based on membrane bioreactor sewage water treatment method, the 3rd aeration head 106 is further set in anaerobic reaction district 4, and the 3rd aeration head 106 arranges downwards, gas blower 12 air outlet air are controlled after air quantity by regularly jet gas explosion downwards separately of the 3rd aeration head 106 by the first air-valve 101, trapped substance sedimentary province is stirred, effectively prevent that settling from forming dead layer.
Of the present invention based on membrane bioreactor sewage water treatment method, aerobic reactor zone 2 dissolved oxygens are at 2.5～3.5mg/L; Membrane module 6 interior regions are in anaerobic environment, and dissolved oxygen is at 0.2～0.5mg/L; Anaerobic reaction district 4 dissolved oxygens, lower than 0.2mg/L, avoid forming aerobic membrane bioreactor, reduce film and pollute, stop up, slow down the speed that membrane flux reduces.Sewage can decompose, be oxidized colloid and dissolved organic matter matter after treatment, removes the goods and materials such as BOD5, COD in water, ammonia nitrogen, phosphorus, suspended substance, colourity, water outlet is reached or be better than GB/T18920-2002 city miscellaneous water water quality standard.
Claims (9)
1. based on a membrane bioreactor sewage water treatment method, treating processes comprises aerobic reaction processing and membrane biological reaction processing, it is characterized in that:
Sewage enters aerobic reactor zone (2) through sewage input tube (3), and the first aeration head (105) arranging by aerobic reactor zone (2) bottom carries out aerated reaction to aerobic reactor zone (2) sewage;
Sewage after the aeration of aerobic reactor zone (2) enters anaerobic reaction district (4) through outputted aerobic water pipe (104) and carries out membrane biological reaction, and aerobic reactor zone (2) exhausted air rinses aeration by the 4th aeration head (108) to membrane module (6) bottom after gas accelerator (10) is accelerated;
Gas blower (12) air outlet air carries out aeration by the second aeration head (107) to membrane module (6) bottom after controlling air quantity by the second air-valve (102), membrane module (6) interior region dissolved oxygen is 0.2～0.5mg/L, open the second recoil valve (903) and the 3rd recoil valve (904), close the first recoil valve (905) and the 4th recoil valve (902), the sump pump that working barrel (8) is crossed membrane module (6) inter-process is delivered to reuse pool (5).
2. membrane bioreactor sewage water treatment method according to claim 1, is characterized in that membrane module (6) interior region lower end dissolved oxygen is 0.5mg/L.
3. membrane bioreactor sewage water treatment method according to claim 1, is characterized in that membrane module (6) interior region middle part dissolved oxygen is 0.3mg/L.
4. membrane bioreactor sewage water treatment method according to claim 1, is characterized in that membrane module (6) interior region upper end dissolved oxygen is 0.2mg/L.
5. membrane bioreactor sewage water treatment method according to claim 1, is characterized in that membrane module (6) is less than 0.2mg/L with exterior domain dissolved oxygen.
6. according to the arbitrary described membrane bioreactor sewage water treatment method of claim 1 to 5, it is characterized in that also comprising controller (11) and dissolved oxygen analytic instrument (901), dissolved oxygen analytic instrument (901) is for measuring the dissolved oxygen content of anaerobic reaction district (4) sewage, dissolved oxygen analytic instrument (901) is connected with controller (11) signal, the second air-valve (102) is connected with controller (11) signal, controller (11) records dissolved oxygen content control the second air-valve (102) aperture by dissolved oxygen analytic instrument (901), make anaerobic reaction district (4) dissolved oxygen content be less than 0.2mg/L.
7. membrane bioreactor sewage water treatment method according to claim 6, is characterized in that membrane module (6) sewage after treatment enters reuse water district (5) after the nitrogen phosphorus in the natural Buddhist stone planar water in physics denitrogenation dephosphorizing district (7).
8. membrane bioreactor sewage water treatment method according to claim 7, it is characterized in that also comprising the first air-valve (101) and the first aeration tube (103), gas blower (12) air outlet air is controlled after air quantity by the 3rd aeration head (106) anaerobic reaction district (4) aeration by the first air-valve (101), and the 3rd aeration head (106) arranges downwards.
9. membrane bioreactor sewage water treatment method according to claim 8, while it is characterized in that aerobic reactor zone (2) bottom arranges the first aeration head (105) aerobic reactor zone (2) sewage is carried out to aerated reaction, gas-water ratio is 10:1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217897A (en) * | 2015-11-06 | 2016-01-06 | 安徽新源农业科技有限公司 | A kind of crop irrigation purifying water process recirculating process |
| CN106830520A (en) * | 2017-02-17 | 2017-06-13 | 上海恒霞环保设备有限公司 | Saprobia cleaning treatment system |
| CN108658377A (en) * | 2018-05-21 | 2018-10-16 | 江苏中百洲环境科技有限公司 | A kind of while denitrogenation dephosphorizing total flood sewage water treatment method |
| CN108996854A (en) * | 2018-09-20 | 2018-12-14 | 浙江爱迪曼环保科技股份有限公司 | Landscape water body cleaning treatment system |
| CN109261680A (en) * | 2018-09-30 | 2019-01-25 | 上海市政工程设计研究总院（集团）有限公司 | A kind of air quantity self-balancing type odor collection system |
| CN109482606A (en) * | 2018-09-30 | 2019-03-19 | 上海市政工程设计研究总院（集团）有限公司 | A kind of air quantity self-balancing type foul smell collection method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217897A (en) * | 2015-11-06 | 2016-01-06 | 安徽新源农业科技有限公司 | A kind of crop irrigation purifying water process recirculating process |
| CN106830520A (en) * | 2017-02-17 | 2017-06-13 | 上海恒霞环保设备有限公司 | Saprobia cleaning treatment system |
| CN108658377A (en) * | 2018-05-21 | 2018-10-16 | 江苏中百洲环境科技有限公司 | A kind of while denitrogenation dephosphorizing total flood sewage water treatment method |
| CN108658377B (en) * | 2018-05-21 | 2020-06-16 | 江苏中百洲环境科技有限公司 | Full-submerged sewage treatment method capable of simultaneously removing nitrogen and phosphorus |
| CN108996854A (en) * | 2018-09-20 | 2018-12-14 | 浙江爱迪曼环保科技股份有限公司 | Landscape water body cleaning treatment system |
| CN109261680A (en) * | 2018-09-30 | 2019-01-25 | 上海市政工程设计研究总院（集团）有限公司 | A kind of air quantity self-balancing type odor collection system |
| CN109482606A (en) * | 2018-09-30 | 2019-03-19 | 上海市政工程设计研究总院（集团）有限公司 | A kind of air quantity self-balancing type foul smell collection method |
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