CN100528770C - Integrative aerobic particle sludge membrane bioreactor sewage treatment method - Google Patents
Integrative aerobic particle sludge membrane bioreactor sewage treatment method Download PDFInfo
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- CN100528770C CN100528770C CNB2007100580187A CN200710058018A CN100528770C CN 100528770 C CN100528770 C CN 100528770C CN B2007100580187 A CNB2007100580187 A CN B2007100580187A CN 200710058018 A CN200710058018 A CN 200710058018A CN 100528770 C CN100528770 C CN 100528770C
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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
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Abstract
This invention discloses a method for treating wastewater by using integrated aerobic granular sludge membrane biological reactor. Said reactor comprises a reaction pond, in which are placed baffle plates (vertically placed plates and inclined placed plates). The above mentioned plates separate the reaction pond into a reaction zone and a settling zone. In the settling zone, on the side wall of reaction pond is equipped with an effluent outlet tube. In the lower middle part of reaction zone is equipped with an aerator. Above the aerator are placed membrane elements, which are then connected with effluent outlet tube and sucking pump. The operation procedures are: continuously feeding wastewater, feeding aerobic granular sludge into the biological reactor, controlling the temperature, proceeding the biological reaction. This invention has advantages of: simple treatment process, high treatment efficiency, stable operation, obtaining effluent water with the need requirement, long service life of membrane elements, low investment and energy-saving.
Description
Technical field
The present invention relates to a kind of treatment process of sewage, particularly relate to a kind of method with aerobic particle sludge membrane bioreactor sewage treatment.
Background technology
Membrane bioreactor (membrane bioreator, MBR) obtained extensive studies and application as a kind of efficient, compact treatment technology in the wastewater treatment and reuse field, problem is still the outstanding problem that restriction MBR further develops but denitrogenation scarce capacity, film be seriously polluted in actual applications etc.Film pollutes the aspects such as improvement that control mainly comprises membrane material improvement, operational condition optimization and mud mixed liquid characteristic, because microorganism flco and most larger molecular organics can not see through film in the mud mixed liquid, therefore active sludge forms the normally principal mode of film pollution of pollution layer in the face accumulation, and the mud mixed liquid characteristic also becomes influences the important factor that film pollutes.Because the cost of the membrane module in the membrane bioreactor is very high, therefore, how decelerating membrane pollution, work-ing life of improving membrane module are to promote that membrane bioreactor is promoted and the key issue of development.Film pollutes normally and characterizes to cross film pressure, is guaranteeing under the constant water flow, and the aggravation of polluting along with film can cause film pressure to rise gradually, can't work until suction pump.In addition, how to adjust and improve that microbial morphology and sludge character problem become one of research focus among the MBR.Studies show that in a large number, can improve mud flco structure, reduce organism cumulative amount in the supernatant liquor by dosing coagulant in reactor or sorbent material (as activated carbon), thus the decelerating membrane pollution process.But, the research of numerous as mentioned above regulating and controlling microbial forms and sludge character also all is to improve the mud performance by additional substance, and real regulating and controlling microbial self growth characteristics that directly passes through, the research of germs collect body characteristics of seeking the optimum membrane bioreactor is also rarely found.
In recent years, research for aerobic particle mud is one of focus of environmental area always, aerobic particle mud has characteristics such as settling velocity is fast, reactive behavior is high, the anti impulsion load ability is strong, the boundary of activated sludge process and biomembrance process in the sewage disposal has been desalinated in the appearance of this spherical mud granule, itself be from flco develop, suspension microorganism aggressiveness that need not any carrier; And from the mass transfer angle, be similar to biomembranous material transfer, and along the mass transfer direction branch of tangible aerobic zone, oxygen-starved area, anaerobic zone is arranged, can accomplish outside nitratedly, inner counter is nitrated.Moreover, sludge character indexs such as the settling property of aerobic particle mud, resistivity also obviously are better than floc sludge.Therefore, the aerobic particle mud technology may substitute the main flow of the biological sewage treatment that the active sludge technology becomes gradually because of its plurality of advantages.
Summary of the invention
The object of the present invention is to provide a kind of processing efficiency height, stable, membrane module long service life, the method for less investment, energy-conservation integrative aerobic particle sludge membrane bioreactor sewage treatment.
Technical scheme of the present invention is summarized as follows:
The method of integrative aerobic particle sludge membrane bioreactor sewage treatment comprises the steps:
(1) integrative aerobic particle sludge membrane bioreactor, comprise reaction tank, in described reaction tank, be provided with dividing plate, described dividing plate is made up of vertical partition plate and oblique dividing plate, described dividing plate is divided into reaction zone and settling region with described reaction tank, described settling region volume accounts for 5%～10% of the total effective volume of reaction tank, described vertical partition plate upper end is 5%～15% of the depth of water apart from water surface elevation, described vertical partition plate height is 40%～60% of the depth of water, described oblique dividing plate and described vertical partition plate angulation are 120～160 degree, described oblique dividing plate lower end is 25%～45% of the depth of water apart from reaction tank bottom distance, the sidewall that is positioned at the reaction tank of settling region is provided with and is settled out water pipe, middle and lower part at described reaction zone is provided with aerator, be provided with membrane module above described aerator, the rising pipe of described membrane module is connected with suction pump;
(2) water inlet continuously, aerobic particle mud is dropped into integrative aerobic particle sludge membrane bioreactor, making the content of aerobic particle mud in sewage is 4000～8000mg/L, controlled temperature is 20～30 ℃, from the rising pipe water outlet time of membrane module be 8～16 minutes, from being settled out the water pipe water outlet time is 2～4 minutes, alternately water outlet, and reactor moves continuously.
The particle diameter of described aerobic particle mud is 800～2000 microns, and described aerobic particle mud total amount remains on more than 80% of mud total amount in the reactor.
Described membrane module is hyperfiltration membrane assembly or micro-filtration membrane module.
The method of a kind of integrative aerobic particle sludge membrane bioreactor sewage treatment of the present invention, it is simple to have a technical process, can obtain water outlet by different effluent quality requirements, the processing efficiency height, stable, membrane module long service life, less investment, advantage such as energy-conservation.
The present invention gives full play to and realizes the advantage of aerobic particle mud by improving the structure of existing membrane bioreactor.
Owing in bio-reactor, added membrane module, make that microorganism is trapped in the reactor fully in the reactor, this has just caused the accumulation of larger molecular organics (mainly being microorganism self meta-bolites) in the reactor, causes certain film to pollute.Because the present invention increases the settling region and carries out precipitated outlet water in reaction tank, therefore can obviously alleviate the accumulation of organism in reactor, precipitated outlet water also can satisfy the urban sewage discharge standard simultaneously; The input of aerobic particle mud, having changed floc sludge needs the present situation of very big settling region and very long sedimentation time, simultaneously, the particle diameter that aerobic particle mud is bigger can reduce the pressure that sewage is crossed membrane module greatly, thereby decelerating membrane pollution process, aerobic particle mud also has mass transfer characteristic preferably, realizes the synchronous nitration and the denitrification of organism, ammonia nitrogen.
Description of drawings
Fig. 1 is the integrative aerobic particle sludge membrane bioreactor structural representation.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
The method of integrative aerobic particle sludge membrane bioreactor sewage treatment comprises the steps:
(1) prepares an integrative aerobic particle sludge membrane bioreactor, see Fig. 1, integrative aerobic particle sludge membrane bioreactor, comprise reaction tank, in reaction tank, be provided with dividing plate 1, dividing plate is made up of vertical partition plate and oblique dividing plate, dividing plate is divided into reaction zone 2 and settling region 34 with reaction tank, the settling region volume accounts for 5%～10% of the total effective volume of reaction tank, the vertical partition plate upper end is 5%～15% of the depth of water apart from water surface elevation, the vertical partition plate height is 40%～60% of the depth of water, oblique dividing plate and vertical partition plate angulation are 120～160 degree, oblique dividing plate lower end is 25%～45% of the depth of water apart from reaction tank bottom distance, the sidewall that is positioned at the reaction tank of settling region is provided with and is settled out water pipe, in the middle and lower part of reaction zone aerator 4 is set, is provided with membrane module 5 above aerator, the rising pipe of membrane module is connected with suction pump;
(2) water inlet continuously, aerobic particle mud is dropped into integrative aerobic particle sludge membrane bioreactor, and making the content of aerobic particle mud in sewage is 4000～8000mg/L, and controlled temperature is 20～30 ℃, sewage is 150～500mg/L in COD concentration, ammonia nitrogen 15～80mg/L, total nitrogen 20～100mg/L, from rising pipe water outlet time of membrane module be 8～16 minutes, from being settled out the water pipe water outlet time is 2～4 minutes, alternately water outlet, by solenoid control, reactor moves continuously.
The particle diameter of aerobic particle mud is 800～2000 microns, and the aerobic particle mud total amount remains on more than 80% of mud total amount in the reactor.
Membrane module can select hyperfiltration membrane assembly or micro-filtration membrane module.
Operating parameter.Novel integrated membrane bioreactor adopts film water outlet and precipitated outlet water cycle to hocket, and time phase is 10～20 minutes weekly, and the film water outlet time: the precipitated outlet water time is smaller or equal to 4.When the mud particle diameter when being 0.8mm～1.0mm oxyty be controlled at 1.0～2.0mg/L; When the mud particle diameter when being 1.0mm～2.0mm oxyty be controlled at 2.0～3.0mg/L.
The source of aerobic particle mud: aerobic particle mud is taken from periodic running reactor (SBR), and this reactor is with the cotton-shaped active sludge inoculation culture of routine, and makes granular sludge by the domestication regulation and control.The domestication regulate and control method: the operation scheme with " water inlet-anaerobism stirring-aerobic aeration-sedimentation and drawing-leave standstill " is carried out.Wherein flooding time is 10～20 minutes, anaerobism churning time 30～120 minutes, and the aerobic aeration time is 120～300 minutes, the sedimentation and drawing time is 10～30 minutes, leaves standstill 15～60 minutes.The anaerobism stirring velocity is 120～220 rev/mins, and the aerobic aeration amount is 60～120 liters/hour.The diameter of reactor and virtual height ratio are 1: 4～1: 7.Influent quality is a municipal effluent, and its chemical oxygen demand (COD) is 200～400mg/L, and ammonia nitrogen is 30～50mg/L.Can make floc sludge finish pelletising process by 20～40 days domestications, the aerobic particle mud particle diameter reaches 800～2000 microns.
Annotate: the operation scheme of above-mentioned reactor is not special, and similar relevant report is also arranged, but each parameter difference.
Aerobic particle mud and membrane bioreactor bonded advantage function:
At present, in membrane bioreactor, inoculate floc sludge usually.We inoculate aerobic particle mud in membrane bioreactor advantage function is mainly reflected in aspect two: the one, to the synchronous removal of pollutents such as organism, ammonia nitrogen, floc sludge can only be with oxidation operation in aerobic reactor, ammonia nitrogen is oxidized to nitrate nitrogen (being nitration reaction), and the nitrogen element still is present in the water like this.Even and aerobic particle mud still can keep stable oxygen-starved area in granule interior in the aerobic aeration reactor, decapacitation is with outside the oxidation operation, can also in the ammonia nitrogen oxidation, utilize the mass transfer feature of aerobic particle mud that the rapid denitrification of nitrate nitrogen is become nitrogen, finish the thorough simultaneous removing of ammonia nitrogen from water.Be that aerobic particle mud not only has bigger particle diameter on the other hand, has fine and close structure simultaneously, and be relatively independent individuality, the filterability energy of aerobic particle mud, settling property all are better than floc sludge greatly like this, therefore, aerobic particle mud will reduce greatly in the pollution of membrane module and the formation of film silk surface, thus the work-ing life of membrane component and prolong.
Aerobic granular sludge membrane bioreactor of the present invention adopts film water outlet and precipitated outlet water to hocket, so both can require to satisfy different needs to different quality, can solve the membrane pollution problem that organism transition accumulation causes in the membrane bioreactor again according to the user.But film water outlet and precipitated outlet water will have a time scale, and the film water outlet time cannot be long, otherwise can't embody advantage, also cannot be too short, otherwise the cost of reactor is risen relatively.
Inoculation aerobic particle mud integral type film biological reactor is provided with the settling region, reactor adopts film water outlet and precipitated outlet water to replace water outlet, can make reactor be in a kind of non-complete closed state, be very beneficial for keeping the quantity of aerobic particle mud in the reactor like this.Aerobic particle mud is at high proportion on the basis of quantity in keeping reactor, reactor can be selected different water outlet proportions according to the different water outlet demands of user, simultaneously aerobic particle mud improves the strainability of mud greatly by self bigger particle diameter, thus decelerating membrane pollution process greatly; And, aerobic particle mud can utilize self mass transfer characteristic, keep stable oxygen-starved area in granule interior, make reactor when obtaining the good removal effect of organism, obtain the synchronous nitration and denitrification effect, be that influent ammonia nitrogen directly changes into gaseous product and removes from water surrounding, rather than floc sludge is only finished nitration reaction to ammonia nitrogen in the conventional film bio-reactor.The present invention is applicable to municipal effluent and sanitary sewage disposal.When the water inlet leading indicator is: organic concentration (COD meter) 150～500mg/L, ammonia nitrogen 15～80mg/L, total nitrogen 20～100mg/L, steady running film go out water removal rate respectively 95%, 90%, and 80%.Can make water outlet satisfy the urban sewage reutilization standard; And each clearance of precipitated outlet water reaches 90%, 90%, 75% respectively, can satisfy the urban sewage discharge primary standard.
10 liters of reactor effective volumes, settling region volume are 1 liter, and controlled temperature is 20～25 ℃, and MLSS is controlled at 5000～7000mg/L, 40 days ages of mud.Employing is the artificial distribution of organic substrate with the sodium acetate, is 200～400mg/L in COD concentration, ammonia nitrogen 30～40mg/L, total nitrogen 35～50mg/L.Inoculation aerobic particle mud particle diameter is 800～1800 microns.The film water outlet time is 7～14 minutes, and the precipitated outlet water time is 3～6 minutes, alternately water outlet.Reactor moves 60 days continuously, and membrane module does not carry out any waterpower and matting.Organism, ammonia nitrogen, total nitrogen are respectively 5～10mg/L, 1～3mg/L, 2～5mg/L in the film water outlet; Organism, ammonia nitrogen, total nitrogen are respectively 5～20mg/L, 1～3mg/L, 5～10mg/L in the precipitated outlet water.And the mud particle diameter accounts for more than 90% of total sludge concentration greater than 400 microns aerobic particle mud in the reactor; Cross film pressure is stabilized in below the 10kPa always.
8 liters of reactor effective volumes, controlled temperature is 20～25 ℃, MLSS is controlled at 4000～6000mg/L, 50 days ages of mud.Adopting certain municipal sewage plant's preliminary sedimentation tank water outlet, is 150～200mg/L in COD concentration, ammonia nitrogen 30～40mg/L, total nitrogen 40～50mg/L.Inoculation aerobic particle mud particle diameter is 800～1800 microns.The film water outlet time is 8～16 minutes, and the precipitated outlet water time is 2～4 minutes, alternately water outlet.Reactor moves 80 days continuously, and membrane module does not carry out any waterpower and matting.Organism, ammonia nitrogen, total nitrogen are respectively 5～10mg/L, 1～3mg/L, 2～5mg/L in the film water outlet; Organism, ammonia nitrogen, total nitrogen are respectively 5～20mg/L, 1～3mg/L, 5～10mg/L in the precipitated outlet water.And the mud particle diameter accounts for more than 85% of total sludge concentration greater than 400 microns aerobic particle mud in the reactor; Cross film pressure is stabilized in below the 12kPa always.
Claims (3)
1. the method for integrative aerobic particle sludge membrane bioreactor sewage treatment comprises the steps:
(1) integrative aerobic particle sludge membrane bioreactor, comprise reaction tank, in described reaction tank, be provided with dividing plate, described dividing plate is made up of vertical partition plate and oblique dividing plate, described dividing plate is divided into reaction zone and settling region with described reaction tank, described settling region volume accounts for 5%～10% of the total effective volume of reaction tank, described vertical partition plate upper end is 5%～15% of the depth of water apart from water surface elevation, described vertical partition plate height is 40%～60% of the depth of water, described oblique dividing plate and described vertical partition plate angulation are 120～160 degree, described oblique dividing plate lower end is 25%～45% of the depth of water apart from reaction tank bottom distance, the sidewall that is positioned at the reaction tank of settling region is provided with and is settled out water pipe, middle and lower part at described reaction zone is provided with aerator, be provided with membrane module above described aerator, the rising pipe of described membrane module is connected with suction pump;
(2) water inlet continuously, aerobic particle mud is dropped into integrative aerobic particle sludge membrane bioreactor, making the content of aerobic particle mud in sewage is 4000～8000mg/L, controlled temperature is 20～30 ℃, from the rising pipe water outlet time of membrane module be 8～16 minutes, from being settled out the water pipe water outlet time is 2～4 minutes, alternately water outlet, and integrative aerobic particle sludge membrane bioreactor moves continuously.
2. the method for a kind of integrative aerobic particle sludge membrane bioreactor sewage treatment according to claim 1, the particle diameter that it is characterized in that described aerobic particle mud is 800～2000 microns, and described aerobic particle mud total amount remains on more than 80% of mud total amount in the reactor.
3. the method for a kind of integrative aerobic particle sludge membrane bioreactor sewage treatment according to claim 1 is characterized in that described membrane module is hyperfiltration membrane assembly or micro-filtration membrane module.
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| TWI483906B (en) * | 2008-12-19 | 2015-05-11 | Saudi Arabian Oil Co | Suspended media granular activated carbon membrane biological reactor system and process |
| CN101898850B (en) * | 2010-04-14 | 2013-02-27 | 中国环境科学研究院 | Continuous-flow aerobic granular sludge membrane bioreactor used for treating berberine pharmaceutical wastewater |
| CN102139952B (en) * | 2011-04-28 | 2012-07-04 | 吉林大学 | Continuous flow air lifting type aerobic granular sludge fluidized bed device for processing difficult degradation waste water |
| CN102701437A (en) * | 2012-06-26 | 2012-10-03 | 中国科学技术大学苏州研究院 | Integrated aerobic granular sludge dynamic membrane bioreaction wastewater treatment device |
| CN106430547B (en) * | 2016-07-25 | 2023-06-27 | 浙江工业大学 | Adjustable two-stage sedimentation tank aerobic granular sludge device |
| CN110606555A (en) * | 2019-10-10 | 2019-12-24 | 北京逸智联科技有限公司 | MBR membrane module and MBR membrane bioreactor |
| ES2974999A1 (en) * | 2022-11-15 | 2024-07-02 | Univ Granada | Aerobic granular bioreactor |
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Patent Citations (4)
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| US5674399A (en) * | 1995-06-05 | 1997-10-07 | Davis; Harold E. | Sewage treatment method |
| CN1765771A (en) * | 2005-09-08 | 2006-05-03 | 山东大学 | Process for two-step type bioreactor for sludge decrement |
| CN1778726A (en) * | 2005-10-14 | 2006-05-31 | 中冶焦耐工程技术有限公司 | Treatment of biological reactor for coking sewage membrane |
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Non-Patent Citations (1)
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