CN103803706B - A kind of based on membrane bioreactor sewage water treatment method - Google Patents
A kind of based on membrane bioreactor sewage water treatment method Download PDFInfo
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- CN103803706B CN103803706B CN201410076654.2A CN201410076654A CN103803706B CN 103803706 B CN103803706 B CN 103803706B CN 201410076654 A CN201410076654 A CN 201410076654A CN 103803706 B CN103803706 B CN 103803706B
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Abstract
The invention discloses a kind of based on membrane bioreactor sewage water treatment method.Treating processes comprises aerobic reaction process and membrane biological reaction process, sewage first carries out aerobic reaction through aerobic reactor zone, sewage after the aeration of aerobic reactor zone enters anaerobic reaction district through outputted aerobic water pipe and carries out membrane biological reaction, and use aerobic reactor zone, anaerobic reaction district exhausted air carries out flushing aeration to membrane module; Gas blower carries out aeration to membrane module bottom simultaneously, controls aeration rate, makes membrane module interior region dissolved oxygen be 0.2 ~ 0.5mg/L, process anaerobic environment.Sewage water treatment method of the present invention, air is after the reaction of aerobic reactor zone, and oxygen oxygen level is very low.Membrane module is in anaerobic environment, avoids membrane module to form aerobic membrane bioreactor, reduce fouling membrane, block, slows down the speed of membrane flux reduction.In anaerobic environment, the phosphorus in body is rejected in mud by polyP bacteria, directly by gasification dephosphorization, is discharged by the phosphorus in sewage with phosphuret-(t)ed hydrogen.
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 developed rapidly in recent years.It not only can replace the second pond of conventional apparatus, and can significantly improve effluent quality.
Current membrane bioreactor mostly is aerobic reaction, and need provides aerating apparatus below membrane module, produces aerobic reaction environment.Under aerobic reaction environment, short, quick death of aerobic cenobium breeding cycle, forms mud phosphorous in a large number.Aerobic bacteria easily produces gluey cenobium, has very strong sticking power, seriously polluted to membrane module, easily stifled film.
Summary of the invention
The present invention is directed to above-mentioned weak point and the one provided based on membrane bioreactor sewage water treatment method, adopt low-oxygen aeration technique, make membrane module form anaerobic environment, avoid the formation of aerobic membrane bioreactor, reduce fouling membrane, block, slow down the speed of membrane flux reduction.
A kind of based on membrane bioreactor sewage water treatment method, treating processes comprises aerobic reaction process and membrane biological reaction process;
Sewage enters aerobic reactor zone through sewage input tube, carries out aerated reaction by arranging the first aeration head bottom aerobic reactor zone to aerobic reactor zone sewage;
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 carries out flushing 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 controlling air quantity by the second air-valve, membrane module interior region dissolved oxygen is 0.2 ~ 0.5mg/L, membrane module water outlet is connected with working barrel water side by the first recoil valve, membrane module water outlet is connected with working barrel feed-water end by the second recoil valve, working barrel water side is connected to reuse pool by the 3rd recoil valve, working barrel is connected to reuse pool by the 4th recoil valve, open the second recoil valve and the 3rd recoil valve, close the first recoil valve and the 4th recoil valve, the sump pump that membrane module inter-process is crossed is delivered to reuse pool by working barrel.
Preferably, membrane module (6) interior region lower end dissolved oxygen is 0.5mg/L.
Preferably, in the middle part of membrane module (6) interior region, dissolved oxygen is 0.3mg/L.
Preferably, membrane module (6) interior region upper end dissolved oxygen is 0.2mg/L.
Preferably, beyond membrane module (6), region soluble oxygen is less than 0.2mg/L.
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, second air-valve is connected with controller signals, controller records dissolved oxygen content by dissolved oxygen analytic instrument and controls the second valve area, makes anaerobic reaction district dissolved oxygen content be less than 0.2mg/L.
For improving the processing power to sewerage nitrogen and phosphor, the sewage after membrane module process enters reuse water district after the nitrogen phosphorus in the natural zeolite planar water in physics denitrogenation dephosphorizing district.
Measuring the precipitation in anaerobic reaction district for alleviating, also comprising the first air-valve and the first aeration tube, blower outlet air to be controlled after air quantity by the 3rd aeration head to anaerobic reaction district aeration by the first air-valve, and the 3rd aeration head is arranged downwards.
Preferably, arranging gas-water ratio when the first aeration head carries out aerated reaction to aerobic reactor zone sewage bottom aerobic reactor zone is 10:1.
Of the present invention based on membrane bioreactor sewage water treatment method, arrange independently aerobic reactor zone, 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, carries out aeration to membrane module, avoids membrane module to form aerobic membrane bioreactor, reduce fouling membrane, block, slows down the speed of membrane flux reduction.
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, the phosphorus in body is rejected in mud by polyP bacteria, enters the anaerobic reaction of long sludge age, directly by gasification dephosphorization, is discharged by the phosphorus in sewage with phosphuret-(t)ed hydrogen.
Accompanying drawing explanation
The treatment unit schematic diagram used based on membrane bioreactor sewage water treatment method that Fig. 1 is invention.
Reference numeral: 101-first air-valve, 102-second air-valve, 103-first aeration tube, 104-outputted aerobic water pipe, 105-first aeration head, 106-the 3rd aeration head, 107-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-second recoil valve, 904-the 3rd recoil valve, 905-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 process and membrane biological reaction process, sewage enters aerobic reactor zone 2 through sewage input tube 314, arranges the first aeration head 105 pairs of aerobic reactor zone 2 sewage and carry out aerated reaction bottom aerobic reactor zone 2, 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 carries out flushing aeration by bottom the 4th aeration head 108 pairs of membrane modules 6 after gas accelerator 10 is accelerated, aeration is carried out by bottom the second aeration head 107 pairs of membrane modules 6 after gas blower 12 air outlet air controls air quantity by the second air-valve 102, membrane module 6 interior region dissolved oxygen is 0.2 ~ 0.5mg/L, membrane module 6 water outlet is connected with working barrel 8 water side by the first recoil valve 905, membrane module 6 water outlet is connected with working barrel 8 feed-water end by the second recoil valve 903, working barrel 8 water side is connected to reuse pool 5 by the 3rd recoil valve 904, working barrel (8) is connected to reuse pool 5 by the 4th recoil valve 902, 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 membrane module 6 inter-process is crossed is delivered to reuse pool 5 by working barrel 8.
Preferably, membrane module (6) interior region lower end dissolved oxygen is 0.5mg/L.
Preferably, in the middle part of membrane module (6) interior region, dissolved oxygen is 0.3mg/L.
Preferably, membrane module (6) interior region upper end dissolved oxygen is 0.2mg/L.
Preferably, beyond membrane module (6), region soluble oxygen is less than 0.2mg/L.
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 signal, second air-valve 102 is connected with controller 11 signal, controller 11 records dissolved oxygen content by dissolved oxygen analytic instrument 901 and controls the second air-valve 102 aperture, makes anaerobic reaction district 4 dissolved oxygen content be less than 0.2mg/L.
For improving the processing power to sewerage nitrogen and phosphor, the sewage after membrane module 6 processes enters reuse water district 5 after the nitrogen phosphorus in the natural zeolite planar water in physics denitrogenation dephosphorizing district 7805.
For alleviating the precipitation measuring anaerobic reaction district 4, also comprise the first air-valve 101 and the first aeration tube 103, gas blower 12 air outlet air is controlled by the 3rd aeration head 106 pairs of anaerobic reaction district 4 aerations after air quantity by the first air-valve 101, and the 3rd aeration head 106 is arranged downwards.
Preferably, arranging gas-water ratio when the first aeration head 105 pairs of aerobic reactor zone 2 sewage carry out aerated reaction bottom aerobic reactor zone 2 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 filtered in sewage, by falling the silt etc. in pond sedimentation sewage, sewage inputs aerobic reactor zone 2 by sewage input tube 3, the air provided by the first aeration head 105 carries out aerobic aeration reaction, 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, aerobic reactor zone 2 exhausted air carries out flushing aeration by bottom the 4th aeration head 108 pairs of membrane modules 6 after gas accelerator 10 is accelerated, air is by entering anaerobic reaction district 4 again behind aerobic zone, extremely low to oxygen level during membrane module 6 aeration, washing action is risen to membrane module 6, not for membrane module 6 biological respinse provides dissolved oxygen.Simultaneously, gas blower 12 air outlet air is by carrying out aeration by bottom the second aeration head 107 pairs of membrane modules 6 after the second air-valve 102, control the air quantity of the second air-valve 102, membrane module 6 interior region dissolved oxygen is made to be 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 membrane module 6 inter-process is crossed is delivered to reuse pool 5 by working barrel 8.
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 signal, second air-valve 102 is connected with controller 11 signal, controller 11 records dissolved oxygen content by dissolved oxygen analytic instrument 901 and controls the second air-valve 102 aperture, makes anaerobic reaction district 4 dissolved oxygen content be less than 0.2mg/L.Anaerobic reaction district 4 is anaerobic reaction environment, avoids the formation of aerobic membrane bioreactor, reduces fouling membrane, blocks, slows down the speed of membrane flux reduction.After sewage aerobic reaction zone 2 and anaerobic reaction district 4 process, decompose, be oxidized colloid and dissolved organic matter matter, remove the goods and materials such as BOD5, COD, ammonia nitrogen, phosphorus, suspended substance, colourity in water.
Sewage after membrane module 6 processes, can further except the pollutent such as nitrogen, phosphorus in decontaminated water after the natural zeolite absorption in physics denitrogenation dephosphorizing district 7.
Of the present invention based on membrane bioreactor sewage water treatment method, 3rd aeration head 106 is set further in anaerobic reaction district 4, and the 3rd aeration head 106 is arranged downwards, gas blower 12 air outlet air is controlled after air quantity by the 3rd aeration head 106 regularly jet gas explosion downwards separately by the first air-valve 101, trapped substance sedimentary province is stirred, effectively prevents settling from forming dead layer.
Of the present invention based on membrane bioreactor sewage water treatment method, aerobic reactor zone 2 dissolved oxygen is at 2.5 ~ 3.5mg/L; Membrane module 6 interior region is in anaerobic environment, and dissolved oxygen is at 0.2 ~ 0.5mg/L; Anaerobic reaction district 4 dissolved oxygen, lower than 0.2mg/L, avoids the formation of aerobic membrane bioreactor, reduces fouling membrane, blocks, slows down the speed of membrane flux reduction.Sewage is decomposable asymmetric choice net, oxidation colloid and dissolved organic matter matter after treatment, removes the goods and materials such as BOD5, COD, ammonia nitrogen, phosphorus, suspended substance, colourity in water, water outlet is reached or is better than GB/T18920-2002 urban reclaimed water water quality standard.
Claims (9)
1., based on a membrane bioreactor sewage water treatment method, treating processes comprises aerobic reaction process and membrane biological reaction process, it is characterized in that:
Sewage enters aerobic reactor zone (2) through sewage input tube (3), and the first aeration head (105) arranged by aerobic reactor zone (2) bottom carries out aerated reaction to aerobic reactor zone (2) sewage;
Sewage after aerobic reactor zone (2) aeration enters anaerobic reaction district (4) through outputted aerobic water pipe (104) and carries out membrane biological reaction, and aerobic reactor zone (2) exhausted air carries out flushing aeration by the 4th aeration head (108) to membrane module (6) bottom after gas accelerator (10) is accelerated;
By the second aeration head (107), aeration is carried out to membrane module (6) bottom after gas blower (12) air outlet air controls air quantity by the second air-valve (102), membrane module (6) interior region dissolved oxygen is 0.2 ~ 0.5mg/L, membrane module (6) water outlet is connected with working barrel (8) water side by the first recoil valve (905), membrane module (6) water outlet is connected with working barrel (8) feed-water end by the second recoil valve (903), working barrel (8) water side is connected to reuse pool (5) by the 3rd recoil valve (904), working barrel (8) is connected to reuse pool (5) by the 4th recoil valve (902), 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 membrane module (6) inter-process is crossed is delivered to reuse pool (5) by working barrel (8).
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 in the middle part of membrane module (6) interior region, 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, beyond it is characterized in that membrane module (6), region soluble oxygen is less than 0.2mg/L.
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, second air-valve (102) is connected with controller (11) signal, controller (11) records dissolved oxygen content by dissolved oxygen analytic instrument (901) and controls the second air-valve (102) aperture, anaerobic reaction district (4) dissolved oxygen content is made to be less than 0.2mg/L.
7. membrane bioreactor sewage water treatment method according to claim 6, is characterized in that the sewage after membrane module (6) process enters reuse water district (5) after the nitrogen phosphorus in the natural zeolite 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 to be controlled after air quantity by the 3rd aeration head (106) to anaerobic reaction district (4) aeration by the first air-valve (101), and the 3rd aeration head (106) is arranged downwards.
9. membrane bioreactor sewage water treatment method according to claim 8, it is characterized in that bottom, aerobic reactor zone (2) arranges gas-water ratio when the first aeration head (105) carries out aerated reaction to aerobic reactor zone (2) sewage is 10:1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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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| CN101229938A (en) * | 2008-01-11 | 2008-07-30 | 哈尔滨工业大学 | Method for controlling or alleviating membrane pollution of membrane bioreactor by regulating operation condition |
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