CN102249425A - Membrane bioreactor and method for purifying sewage by using same - Google Patents

Membrane bioreactor and method for purifying sewage by using same Download PDF

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Publication number
CN102249425A
CN102249425A CN2011101062711A CN201110106271A CN102249425A CN 102249425 A CN102249425 A CN 102249425A CN 2011101062711 A CN2011101062711 A CN 2011101062711A CN 201110106271 A CN201110106271 A CN 201110106271A CN 102249425 A CN102249425 A CN 102249425A
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sump
microorganism
water
film filter
reaction pond
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CN2011101062711A
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CN102249425B (en
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郭大磊
孙玉华
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Jiangxi aidisheng biopolymer material Co.,Ltd.
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Huake Institute of Bio-polymeric Materials Kunshan Industrial Technology Resear
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Biological Treatment Of Waste Water (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a membrane bioreactor, which comprises a microbial reactor, a membrane filter, a water pump, an air blower, an aeration disk, a water purifying tank, a plurality of connection pipelines and a plurality of valves, wherein microorganisms capable of decomposing pollutants in sewage and microorganism carriers for growing and reproducing the microorganisms are arranged in the microbial reactor; the membrane filter is arranged outside the microbial reactor; a cylindrical filter core is arranged inside the membrane filter; and water obtained by filtering with the cylindrical filter core is collected into the water purifying tank. In the membrane bioreactor, the microbial reactor and the membrane filter are arranged separately, so that most pollutants are decomposed and removed after sewage is subjected to microbial treatment in the microbial reactor, the rest of the sewage flows through the membrane filter for filtering, a membrane component of the membrane filter is prevented from being polluted and blocked easily, the service life of the membrane bioreactor is prolonged, the trouble of cleaning the membrane filter is eliminated for operating personnel, and the water yield is increased.

Description

A kind of membrane bioreactor and the method for purifying waste water thereof
Technical field
The present invention relates to a kind of membrane bioreactor, and the method for using this membrane bioreactor to purify waste water
Background technology
Membrane bioreactor (Membrane Bio-Reactor, MBR) be to combine membrane separation technique and biologic treating technique are efficient, be used for purifying domestic sewage, organic industrial sewage etc., it has plurality of advantages such as effluent quality is good, floor space is little, operational management is convenient.What use was more at present is traditional integral type film biological reactor, it is filtering film component to be soaked place the microorganism reactor inside with active sludge, after pending sewage enters membrane bioreactor, most of dirt in the sewage is at first decomposed by the mud in the microorganism reactor to be removed, these water bodys filter through filtering film component more under external pressure, get final product water purification.This membrane bioreactor is owing to soak filtering membrane and place active sludge, thereby membrane flux is relatively low, takes place easily that film pollutes and film stops up, and the cleaning of filtering membrane and change also inconvenience
Summary of the invention
Technical problem to be solved by this invention is to overcome in the prior art that the membrane flux of integral type film biological reactor is low, filtering membrane easily pollutes and blocking problem, and a kind of novel membrane bioreactor is provided.
The present invention also will provide a kind of method of using above-mentioned membrane bioreactor to purify waste water simultaneously.
For solving above technical problem, the technical scheme that the present invention takes is:
A kind of membrane bioreactor, comprise microorganism reactor, film filter, water pump, gas blower, aeration plate, clear water tanks and a plurality of connecting pipeline and valve, wherein, microorganism reactor comprises at least one microbial reaction pond, has the microorganism that can decompose the dirt in the sewage and the microbe carrier that supplies microorganism growth and breeding in this microbial reaction pond; Aeration plate is arranged on the bottom in microbial reaction pond and one end and stretches out outside the microbial reaction pond and with gas blower and be connected; Film filter places outside the microorganism reactor, and it comprises that the sump that is used to collect the water that flows into from the microbial reaction pond and at least one place the tubular filter core in the sump; Clear water tanks communicates with the inner core of tubular filter core, is used to collect the water through described tubular filter element filtering gained.
Preferably, described microbe carrier comprises the door curtain made of cloth and protruded packing, and described microbial reaction pond is divided into the filler chamber that is used to hang the bacterium curtain chamber of the door curtain made of cloth and is used to load protruded packing, and described bacterium curtain chamber and filler chamber are arranged side by side, and the two communicates in the bottom.
Preferably, described microbial reaction also is equipped with temperature control unit in the pond, and it can guarantee the temperature environment that microorganism growth is required.
Preferably, described microorganism is that code name is the patent microorganism of CCTCC NO.M208057～208061.
Preferably, the inner core of described tubular filter core is connected with two opposite water pumps of operative orientation simultaneously, one of them water pump is used for the described clear water tanks of water suction with described tubular filter element filtering gained, and another water pump is used for the water of described clear water tanks is withdrawn in the described inner core so that the outer dirt of being held back of described filter core is carried out back flushing.
Preferably, described tubular filter core has two or more, and they and place in the described sump.
Preferably, described microbial reaction pond has a plurality of, and described a plurality of microbial reactions pond serial connection.
Preferably, described film filter comprises one-level film filter and secondary film filter, wherein the sump of one-level film filter is connected with the microbial reaction pond at end, and the inner core of the tubular filter core of one-level film filter is connected with the sump of secondary film filter; The inner core of the tubular filter core of described secondary film filter communicates with clear water tanks.And it is the filter core described in 201120063461.5 the Chinese patent that described tubular filter core is preferably number of patent application.
The method that the above-mentioned membrane bioreactor of a kind of usefulness is purified waste water may further comprise the steps:
(1) sump pump is gone in the microorganism reactor, open gas blower,, the sewage through the processing of the microbiological degradation in the microorganism reactor is further flowed in the sump of film filter by aeration plate aeration oxygen replenishing in the microbial reaction pond;
(2) filtration that makes the interior sewage of sump pass through the tubular filter core enters the inner core of tubular filter core and is pumped in the clear water tanks by water pump, obtain water purification, and every interval one setting-up time is back to the water purification in the clear water tanks in the inner core of described tubular filter core so that the outer dirt of being held back of described tubular filter core is carried out back flushing.
As the further improvement of aforesaid method, described method also is included in the amount of purifying waste water when reaching certain value, the sump pump in the sump of film filter is back in the microorganism reactor, to reduce the content of microorganism in the sump.
Because the enforcement of technique scheme, the present invention compared with prior art has following advantage and effect:
Membrane bioreactor of the present invention is arranged microorganism reactor and film filter branch, make sewage after through the microbiological treatment in the microorganism reactor, most dirt is decomposed removal, the remaining sewage film filter of flowing through again filters, make the membrane module of film filter be difficult for polluting and stopping up, prolonged the work-ing life of membrane bioreactor, removed the cleaning trouble of operator from, improved product water efficient film filter.
Description of drawings
Fig. 1 is the structural representation of membrane bioreactor of the present invention;
Wherein: 1, microorganism reactor; 10, bacterium curtain chamber; 11, filler chamber; 12, temperature control unit; 2, film filter; 20, sump; 3, the door curtain made of cloth; 4, protruded packing; 5, aeration plate; 6, gas blower; 7, clear water tanks; 8, former pond; 9, screen tray;
M1, M2, U1, U2: tubular filter core;
J1～J8: pneumavalve;
A1～A7: manual switch;
C1～C5, E1～E5: magnetic valve;
Y1～Y6: liquid level switch;
PU0～PU4: water pump.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the present invention is further described, but the invention is not restricted to this embodiment.
Embodiment 1
Referring to Fig. 1,, form by microorganism reactor 1, film filter 2, gas blower 6, aeration plate 5, clear water tanks 7, a plurality of connecting pipeline, various valve and a plurality of water pump according to the membrane bioreactor of present embodiment.
Wherein, (1. microorganism reactor 1 comprises three microbial reaction ponds, 2. and 3. number microbial reaction pond), have the microorganism that to decompose the dirt in the sewage and the microbe carrier that supplies microorganism growth and breeding in each microbial reaction pond, microbe carrier in the present embodiment is the porous support that the nonwoven door curtain made of cloth 3 and spherical light-weight protruded packing 4(can be the different shapes of fiber or polyethylene material), and the filler chamber 11 that all use polyacrylic dividing plate to separate in the middle of each microbial reaction pond to be formed for hanging the bacterium curtain chamber 10 of the door curtain made of cloth 3 and to be used to load protruded packing 4, the bottom of bacterium curtain chamber 10 and filler chamber 11 communicates, 1/3～1/2(nonwoven door curtain made of cloth 3 that the loading level of protruded packing 4 in filler chamber 11 accounts for the filled chamber volume also can be the cloth with vesicular structure of other curtain shapes, it is made of one formula and is suspended in the bacterium curtain chamber 10, is convenient to change).Employed microorganism is that (patent microorganism code name is CCTCC NO.M208057～208061 to distinctive patent microorganism in the present embodiment, number of patent application is 200810100231.4), it has good removal effect by biological metabolism to the organism that contains elements such as ammonia, nitrogen, sulphur, phosphorus in the sewage; Microorganism grows on the door curtain made of cloth 3 and protruded packing 4 and breeds, and for existing active sludge carrier, be not easy to form and stop up, and the breeding space of microorganism is also very big.
Aeration plate 5 is arranged on the bottom in each microbial reaction pond, and its end stretches out outside the microbial reaction pond and is connected with gas blower 6; Open pneumavalve J8 startup gas blower 6 and can pass through aeration plate 5 aeration in the microbial reaction pond, its aeration rate is at 0.2～1.0m 3 Between/the h, effect mainly is to be breeding of the microbial growth on the door curtain made of cloth 3 and the protruded packing 4 and metabolism decontamination increase oxygen.
In addition, temperature control unit 12 is installed also in the microbial reaction pond, it can guarantee the temperature environment that microorganism growth is required.
Film filter 2 is arranged at outside the microorganism reactor 1, and it comprises the sump 20 that is used to hold the water that flows into from the microbial reaction pond and and places two tubular filter cores (quantity of tubular filter core can be provided with two or more according to real space size and the amount of disposing of sewage) in the sump 20.Film filter 2 has two in the present embodiment, be respectively one-level film filter I and secondary film filter II, two tubular filter cores in the one-level film filter I are respectively M1 and M2, employed filtering membrane is the about 0.45 micron microfiltration membrane in aperture, two tubular filter cores in the secondary film filter II are respectively U1 and U2, and employed filtering membrane is the about 0.05 micron ultra-filtration membrane in aperture.To be number of patent application be the filter core described in 201120063461.5 the Chinese patent to employed tubular inner core in the present embodiment.During filtration, the sewage of handling through microorganism reactor 1 at first flows into one-level film filter I, flows into secondary film filter II again through gained water after filter core M1 and the M2 filtration and further filters.
Clear water tanks 7 is to communicate with two tubular filter core U1 of secondary film filter II and the inner core of U2, filters resulting water purification through secondary film filter II and promptly is pumped in the clear water tanks 7.
In the present embodiment, the inner core of the tubular filter core M1 in the one-level film filter I is connected with two the water pump P U1 and the PU2 of reverse operation simultaneously.During work, PU1 can filter tubular filter core M1 in gained water and pump in the sump 20 of secondary film filter II, and PU2 can be back to the water pump in the sump 20 of secondary film filter II in the inner core of the tubular filter core M1 in the one-level film filter I so that the outer dirt of being held back of filter core M1 is carried out back flushing.Similarly, but tubular filter core M2, U1 and U2 have all adopted the mounting means of this back flushing.
Embodiment 2
Present embodiment has been introduced a kind of method of purifying waste water with the membrane bioreactor of embodiment 1, and its operating process is as follows:
Open pneumavalve J5 and J7, start water pump P U0, from former pond 8, sump pump is gone in the microorganism reactor 1 (three microbial reaction ponds in the microorganism reactor 1 to be stipulated, according to water (flow) direction 1. number in turn for, 2. number and 3. number reaction tank), sewage flows into from the top of the 1. bacterium curtain chamber 10 in number microbial reaction pond that (this top, bacterium curtain chamber has screen tray 9, sewage need at first carry out coarse filtration), bottom from bacterium curtain chamber 10 flows to filler chamber 11 again, when in 1. number microbial reaction pond, reaching certain liquid level, sewage enters the 2. bacterium curtain chamber in number microbial reaction pond from the upper end overflow of filler chamber 11, by that analogy, flow through in turn 2. number and 3. number microbial reaction pond.When sewage reaches the position of liquid level switch Y2 in 3. number microbial reaction pond, close starting valve J7, open pneumavalve J3, make sewage in bio-reactor 1, carry out internal recycle; Open gas blower 6 and pneumavalve J8 simultaneously, by aeration plate 5 aeration oxygen replenishing in the microbial reaction pond.This process duration 3～4 hours, mainly be to make microorganism breeding in a large number on the door curtain made of cloth 3 and protruded packing 4, remove the dirts such as organism in the sewage, this step also can be added biotechnological formulation or nutritive medium (containing amino acid and glucose) according to the water quality condition of sewage in the microbial reaction pond, make microorganism growth more vigorous, detersive efficiency is higher.Behind this EOS, close pneumavalve J3, open pneumavalve J7, J5 and water pump P U0 works better, the sewage of handling through the microbiological degradation in the microorganism reactor 1 will advance in the sump 20 of one-level film filter I from 3. filler chamber's top overflow in number microbial reaction pond;
When the water level in the sump 20 of one-level film filter I reaches Y5, open magnetic valve C2 and C3, start water pump P U1, two filter core M1 and M2 produce water simultaneously, keep producing water conservancy project and make pressure below 0.05MPa, filter gained water and pumped in the sump 20 of secondary film filter II by water pump P U1.When the water level in the sump 20 of secondary film filter II reach a certain height, can open PU2 filter core M1 and M2 are carried out back flushing.Product water-backwash process of two filter core M1 and M2 hockets.When opening C2, C4, when closing C1, C3, start PU1 and PU2, filter core M1 produces water, and filter core M2 carries out back flushing; On the contrary, when opening C1, C3 when closing C2, C4, start PU1 and PU2, then filter core M1 carries out back flushing, and filter core M2 produces water.Produce water conservancy project and make pressure less than 0.05MPa, produce the water time set at 30s～5min, the back flushing operating pressure is greater than 0.1MPa, and backwashing time is set between 1.5s～30s.When filter core M1 produced water, filter core M2 can carry out back flushing; When filter core M2 produced water, filter core M1 can carry out back flushing; Product water-the backwash process that so hockets can guarantee that the continous-stable of one-level film filter I produces water.Similarly, product water-backwash process of two filter core U1, U2 of secondary film filter II similarly so that membrane bioreactor can continous-stable produces water.
Filtering gained water is all collected by clear water tanks 7 at last.
After work for some time, the microorganism of being held back by filter core M1 and M2 in the one-level film filter I is concentrated, and this certainly will exert an influence to the filtration of one-level film filter I, produces membrane flux and descends.Can open valve J4 and valve A1 this moment, and the microorganism concentrated solution is back in No. 1 reactive tank, and this had both improved the microorganism concn in the microorganism reactor, had alleviated the burden of one-level membrane reactor I again, made filter membrane not easy damaged and obstruction.
In sewage purification process, preferably should control the residence time of sewage in microorganism reactor with consistent through the film filter filter time, to realize that carrying out the microbiological treatment the other side on one side can carry out the membrane filtration processing simultaneously, guarantees the product water continuity of membrane bioreactor.
After the entire sewage scavenging process finishes, need microorganism reactor is carried out the emptying operation, promptly open J1, J2, J3, J6 and PU0 simultaneously, 1., 2. and 3. the water in number microbial reaction pond is all pumped in the one-level film filter I, obtain water purification through the filtration of one-level film filter I and secondary film filter II and flow in the clear water tanks.Final most microorganism will concentrate in the one-level film filter I.
The effluent purification method of present embodiment, adopt the membrane bioreactor among the embodiment 1 to carry out, all water inlets and purification filtering process all can be controlled automatically by the opening and closing of each water pump of computer control, valve and finish, bio-reactor and film filter divide open shop, the longer service life of device, product water efficient is higher.With common product only be 20 L/m 2 The product discharge of hr is compared, and the product discharge of the membrane bioreactor of present embodiment can reach 300L/m 2 Hr is higher 15 times than usual production; And the present embodiment membrane bioreactor purifies the ammonia nitrogen removal frank of gained water greater than 95%, and the sulfide clearance is greater than 60%, and total tp removal rate is greater than 50%.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention

Claims (10)

1. A kind of membrane bioreactor, comprise microorganism reactor (1), film filter (2), water pump, gas blower (6), aeration plate (5), clear water tanks (7) and a plurality of connecting pipeline and valve, it is characterized in that: described microorganism reactor (1) comprises at least one microbial reaction pond, has the microorganism that can decompose the dirt in the sewage and the microbe carrier that supplies microorganism growth and breeding in the described microbial reaction pond; Described aeration plate (5) is arranged on the bottom in described microbial reaction pond and one end and stretches out outside the described microbial reaction pond and with gas blower (6) and be connected; Described film filter (2) places outside the described microorganism reactor (1), and it comprises that the sump (20) that is used to collect the water that flows into from described microbial reaction pond and at least one place the interior tubular filter core of described sump (20); Described clear water tanks (7) communicates with the inner core of described tubular filter core, is used to collect the water through described tubular filter element filtering gained.
2. Membrane bioreactor according to claim 1, it is characterized in that: described microbe carrier comprises the door curtain made of cloth (3) and protruded packing (4), described microbial reaction pond is divided into the filler chamber (11) that is used to hang the bacterium curtain chamber (10) of the door curtain made of cloth (3) and is used to load protruded packing (4), described bacterium curtain chamber (10) and described filler chamber (11) are arranged side by side, and the two communicates in the bottom.
3. Membrane bioreactor according to claim 1 is characterized in that: temperature control unit (12) also is installed in the described microbial reaction pond.
4. According to claim 1 or 2 or 3 described membrane bioreactors, it is characterized in that: described microorganism is that code name is the patent microorganism of CCTCC NO.M208057～208061.
5. Membrane bioreactor according to claim 1 is characterized in that: the inner core of described tubular filter core is connected with two opposite water pumps of operative orientation simultaneously.
6. Membrane bioreactor according to claim 5 is characterized in that: described tubular filter core has two or more, and they and place in the described sump (20).
7. According to the described membrane bioreactor of each claim in the claim 1,2,3,5 and 6, it is characterized in that: described microbial reaction pond has a plurality of, and described a plurality of microbial reactions pond serial connection.
8. Membrane bioreactor according to claim 7, it is characterized in that: described film filter (2) comprises one-level film filter (I) and secondary film filter (II), the sump (20) of wherein said one-level film filter (I) is connected with the microbial reaction pond at end, and the inner core of the tubular filter core of described one-level film filter (I) is connected with the sump (20) of secondary film filter (II); The inner core of the tubular filter core of described secondary film filter (II) communicates with clear water tanks (7).
9. A kind of method of purifying waste water with the described membrane bioreactor of claim 1 is characterized in that: may further comprise the steps:
(1) sump pump is gone in the microorganism reactor, open gas blower,, the sewage through the processing of the microbiological degradation in the microorganism reactor is further flowed in the sump of film filter by aeration plate aeration oxygen replenishing in the microbial reaction pond;
(2) filtration that makes the interior sewage of sump pass through the tubular filter core enters the inner core of tubular filter core and is pumped in the clear water tanks by water pump, obtain water purification, and every interval one setting-up time is back to the water purification in the clear water tanks in the inner core of described tubular filter core so that the outer dirt of being held back of described tubular filter core is carried out back flushing.
10. Method of purifying waste water according to claim 9, it is characterized in that: described method also is included in the amount of purifying waste water when reaching certain value, sump pump in the sump of film filter is back in the microorganism reactor, to reduce the content of microorganism in the sump
CN2011101062711A 2011-04-27 2011-04-27 Membrane bioreactor and method for purifying sewage by using same Active CN102249425B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489156A (en) * 2011-12-16 2012-06-13 北京化工大学 Bio-carbon-fiber flat membrane component and sewage treatment reactor
CN111977891A (en) * 2020-07-24 2020-11-24 北京水研环境科技股份有限公司 Process for sewage dephosphorization and degradation product recovery in MBR system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1807279A (en) * 2006-02-17 2006-07-26 南京工业大学 High-pass flexible bionic dynamic membrane assembly and its production method and uses
CN1899979A (en) * 2005-07-21 2007-01-24 中国科学院生态环境研究中心 Contact oxidizing H circulation pipe film biological reactor
CN201010579Y (en) * 2007-02-13 2008-01-23 诺卫环境安全工程技术(天津)有限公司 Polyphase combined film bioreactor
CN201713380U (en) * 2010-06-29 2011-01-19 天津博隆环保技术工程有限公司 Composite biological membrane assembly for deep treatment of sewage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1899979A (en) * 2005-07-21 2007-01-24 中国科学院生态环境研究中心 Contact oxidizing H circulation pipe film biological reactor
CN1807279A (en) * 2006-02-17 2006-07-26 南京工业大学 High-pass flexible bionic dynamic membrane assembly and its production method and uses
CN201010579Y (en) * 2007-02-13 2008-01-23 诺卫环境安全工程技术(天津)有限公司 Polyphase combined film bioreactor
CN201713380U (en) * 2010-06-29 2011-01-19 天津博隆环保技术工程有限公司 Composite biological membrane assembly for deep treatment of sewage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489156A (en) * 2011-12-16 2012-06-13 北京化工大学 Bio-carbon-fiber flat membrane component and sewage treatment reactor
CN111977891A (en) * 2020-07-24 2020-11-24 北京水研环境科技股份有限公司 Process for sewage dephosphorization and degradation product recovery in MBR system
CN111977891B (en) * 2020-07-24 2022-07-15 北京水研环境科技股份有限公司 Process for sewage dephosphorization and degradation product recovery in MBR system

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