CN101941757A - Air supply type jet aerating external membrane bioreactor - Google Patents
Air supply type jet aerating external membrane bioreactor Download PDFInfo
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- CN101941757A CN101941757A CN2010102730852A CN201010273085A CN101941757A CN 101941757 A CN101941757 A CN 101941757A CN 2010102730852 A CN2010102730852 A CN 2010102730852A CN 201010273085 A CN201010273085 A CN 201010273085A CN 101941757 A CN101941757 A CN 101941757A
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- biochemical reaction
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- membrane bioreactor
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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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Abstract
The invention provides equipment for treating wastewater by utilizing a biochemical technology and a membrane separating technology, in particular relates to air supply type jet aerating external membrane bioreactor wastewater treatment equipment. The equipment comprises an integrated biological reactor, an air supply type jet aerating unit and an external membrane separating unit. The invention integrates the advantages of various water treatment technologies of deep aeration, biological fluidized bed, jet aeration, membrane separation, SBR (Sequencing Batch Reactor) denitrification and dephosphorization processes, and the like, does not need blast aerating equipment, has high oxygen transfer utilization efficiency and less residual sludge, can realize long-time stable running with low energy consumption and is easy to achieve the function of denitrification and dephosphorization of wastewater. The equipment has the advantages of high discharged water quality, simple process, less fixed investment, small size and occupation area, convenient running, management and maintenance and difficult damage, is easy to realize automatic control and has more favorable application prospect in the field of treatment and recycling of wastewater.
Description
Technical field
The invention belongs to and utilize biochemical technology and membrane separation technique to handle the equipment of waste water, particularly a kind of Gas feeding jet-flow aeration external membrane bioreactor sewage treatment equipment.
Background technology
Membrane bioreactor is a traditional activated sludge process and the combining of membrane separation technique.Microorganism reaches and removes organic purpose organism biodegrade in the former water in the active sludge.Film separation unit has replaced the second pond in the traditional technology, can hold back suspended solid in the former water, colloidalmaterial etc., guarantees high-quality and stable water flow quality.Membrane bioreactor has been compared following advantage with the traditional water treatment process: floor space is little, only is the 1/3-1/2 of traditional technology; Effluent quality is good, but reuse; Turbidity is starkly lower than traditional technology, for the removals of colibacillus, phage and deleterious Micropollutants clearly; Sludge concentration height in the biological processing unit, mud is long age, to the organic removal rate height; For nitrogen and phosphorus pollutants higher removal effect is arranged; Compare with traditional technology, the surplus sludge volume that membrane bioreactor produces is few, has reduced the expense that excess sludge is disposed; Membrane biological reactor process is simple, volume is little, operational management is convenient, be easy to realize automatic control.
According to the relative position of membrane module and bio-reactor, membrane bioreactor is divided into submerged membrane bioreactor and external membrane bioreactor.
External membrane bioreactor is placed apart bio-reactor and membrane module, the mixed solution of bio-reactor enters membrane module after supercharging, see through film under pressure and obtain system's water outlet, active sludge then is trapped, and is back to (Fig. 5) in the bio-reactor with concentrated solution.The external membrane bioreactor characteristics are stable and reliable operations, be easy to film cleaning, change and set up, and membrane flux is generally bigger.But known external membrane bioreactor adopts blast aeration to provide metabolic needed air for active sludge more, and works the effect of mixing.Be that biological reaction tank configuration blast aeration system needs expensive investment, caused the membrane bioreactor system fixed investment too high with the membrane separation plant of high cost.The blast aeration process need consume big energy, also is difficult for carrying out the denitrification process operation.Under the general condition, for reducing the deposition of pollutent on the film surface, prolong the cleaning interval of film, external film separation unit needs recycle pump that higher face cross-flow flow velocity is provided, the water circulation amount is big, power charge is high, it is reported that existing known external membrane bioreactor unit consumption of energy is very high, generally at 3～5kWh/m
3, be 10～15 times of conventional activated sludge process approximately.Membrane bioreactor utilizes the concentrated characteristic of membrane sepn to improve the sludge concentration of biological reaction tank, thereby increases the removal ability of biological reaction tank, is easy to form film and pollutes but sludge concentration is too high, and under certain condition, sludge concentration is high more, and membrane flux is low more; Have research to think that the face cross-flow velocity is not high more good more, the increase of crossflow velocity makes the attenuation of film surface contamination layer might cause irreversible pollution, and the shearing force that the high speed rotating of pump produces can make the certain micro-organisms thalline produce deactivation phenomenom.Therefore, should manage existing external membrane bioreactor wastewater processing technology is improved, solve problems such as present known external membrane bioreactor investment height, working cost height.
Summary of the invention
The object of the invention is to overcome defectives such as known external membrane bioreactor investment height, working cost height, and a kind of easy handling, the lower Gas feeding jet-flow aeration external membrane bioreactor sewage treatment equipment of investment working cost are provided.
Equipment of the present invention is made up of integrated bio reactor, external membrane separating unit and Gas feeding jet-flow aeration unit.
Described integrated bio reactor is made up of the degassing pond on deep aerating biochemical reaction tank that is positioned at the bottom and top.In biochemical reaction tank, be provided with center water conservancy diversion inner core, the water conservancy diversion inner core is for falling the stream pipe, circular channel between pool wall and inner core is a upspout, circulation force (forcing) pump water sucking mouth is arranged in the degassing pond, circulation force (forcing) pump water outlet shower nozzle is downward, be arranged in inner core central upper portion position, raw water inlet is arranged in circulation force (forcing) pump water outlet shower nozzle below.Described external membrane separating unit is made up of membrane module, recycle pump, membrane module washing unit, pipeline, valve, instrument and electrical control etc.; Described membrane module adopts external inner pressed filtered version, and pore size filter is between (micro-filtration) between 0.1～0.4 μ m and 0.05～0.1 μ m (ultrafiltration); The necessary membrane module washing unit of membrane module configuration, this device can be combined into a whole set of equipment with membrane bioreactor as required, also can be designed to mobile unit, and realization one cover washing unit is served a plurality of film bioreactor devices.Described Gas feeding jet-flow aeration unit is furnished with the forced gas supply system; Before and after the ejector valve is set, is installed on the preceding circulation force (forcing) pump pressure pipe of membrane module, and the bye-pass in parallel of band valve is installed.
The technical process that Gas feeding jet-flow aeration external membrane bioreactor of the present invention is handled waste water is:
Pending waste water is at first entered the below of deep aerating biochemical reaction tank central draft tube top circulation force (forcing) pump outlet shower nozzle by water intake; What the circulation force (forcing) pump produced injects the reaction tank central draft tube through the spissated cycle of higher pressure liquid of membrane module through the outlet shower nozzle, make the shower nozzle below form high speed turbulent shear district, the gas that ejector is sucked further is dispersed into tiny bubble, and the water inlet of carrying shower nozzle below secretly forms the mixed solution that is rich in oxygen and active sludge, carries out the high-efficiency aerobic biochemical reaction; Mixed solution flows downward along central draft tube simultaneously, after reaching reactor bottom, upwards backflow through annular upspout again and arrive annular upspout top, most of oxygen is consumed by biochemical reaction in the mixed solution at this moment, wherein a part of mixed solution is jet under shearing again, operation so moves in circles, so, sewage is by oxygenation repeatedly, bubble and microbial bacteria micelle are constantly sheared refinement, and form fine and close tiny flocs unit, and in the reciprocation cycle process, carrying out efficient biochemical reaction, the organic pollution materials in the waste water obtains degraded and removes; It more than is biochemical reaction cycle process.
Another part mixed solution enters degassing pond, sloughs the air pocket in the mixed solution, is beneficial to enter the membrane sepn recycle system and carries out jet-flow aeration; Simultaneously, mud in the mixed solution has part and sinks at the bottom of the degassing pond, and pool bottom sludge backflash with a slope is slipped to the biochemical reaction tank central draft tube through degassing pond, continues to participate in biochemical working cycle, this process can reduce the circulation fluid sludge concentration that enters film separation unit, helps alleviating film and pollutes; Mixed solution after the degassing and the mud-water separation enters membrane module again and carries out filtering separation behind the supercharging of circulation force (forcing) pump, ejector aeration, concentrated solution after the filtration is injected the biochemistry pool central draft tube through circulation fluid outlet shower nozzle and is continued biochemical working cycle, and film separating system sees through liquid and is system's water outlet; It more than is the membrane sepn working cycle.
More than two processes move continuously, move in circles the water and make that organism is purified by aerobic oxidation in the waste water of can realizing being back to back.
When if waste water nitrogen content height has the denitrogenation requirement, whether only need the work of regulated valve control jet aerator, other parts of equipment are still by above-mentioned aerobic biochemical technical process operation, the water of can being back to back, intermittent aeration, realize aerobic---the anoxic alternate run, thus reach the digestion and the purpose of denitrification denitrogenation.
Beneficial effect of the present invention is:
1. the Gas feeding jet aerator is set on the film separation unit circulation line replaces traditional blast aeration, save blast aeration system and build fixed investment, the external membrane bioreactor investment is reduced;
2. utilize circulation force (forcing) pump energy more than needed and jet aerator to carry out aeration, save the big energy that the blast aeration process consumes, the advantage of biochemical reaction tank is integrated biological fluidized bed and two kinds of water technologies of deep aerating, mud is the suspension fluidized state in the reactor, it is more even that mixed solution muddy water gas three-phase is mixed, and the transfer efficiency of oxygen is higher, improves biochemical reaction efficient, so the reactor total energy consumption is lower, reduced ton water treatment running cost.
3. most of biochemical circulation mixed solution enters degassing pond from upspout and sloughs air pocket, carry out simple precipitation simultaneously, with the mixed solution sludge concentration that reduction enters film separation unit, behind the supercharging of circulation force (forcing) pump, ejector aeration, become gas-liquid mixture again and enter membrane module and filter; The high-pressure gas-liquid two phase flow is easy to reach turbulence state, can make membrane sepn long-play and be difficult for film and pollute under the cross-flow velocity of lower film surface, prolongs film cleaning interval and work-ing life, cuts down the consumption of energy, and reduces film cleaning, maintenance and replacement charge.
4. for the high organic polluting water of nitrogen content, only need can realize the water of being back to back that intermittent aeration is finished aerobic by the valve on control jet device valve and the parallel branch thereof---the anoxic alternate run, thus reach the purpose of nitrification and denitrification denitrogenation.
Description of drawings
Fig. 1 is a Gas feeding jet-flow aeration external membrane bioreactor process flow diagram
Fig. 2 is Gas feeding jet-flow aeration unit (b) synoptic diagram
Fig. 3 is external membrane separating unit (c) synoptic diagram
Fig. 4 is integrated bio reactor (a) synoptic diagram
Fig. 5 is existing external membrane bioreactor synoptic diagram
A-integrated bio reactor among the figure, b-Gas feeding jet-flow aeration unit, c-external membrane separating unit, 1-deep aerating biochemical reaction tank, the 2-pond that outgases, 3-Gas feeding jet aerator, 4-air flowmeter, 5-circulation force (forcing) pump, 6-parallel branch pipe, 7-tensimeter, the 8-valve, the external inner pressed membrane module of 9-, 10-membrane module washing unit, 11-clear water water outlet, 12-clean water basin, 13-raw water inlet, 14-circulation force (forcing) pump water outlet shower nozzle, 15-circulation fluid water sucking mouth, 16-forced gas supply system.
Embodiment:
Below in conjunction with accompanying drawing the specific embodiment of the invention is further described.
As shown in Figure 1, raw water inlet (13) is positioned at deep aerating biochemical reaction tank (1) central draft tube top, is arranged on water outlet shower nozzle (14) below of circulation force (forcing) pump (5); Mixed solution in the degassing pond (2) after the degassing and simple precipitation is through the supercharging of circulation force (forcing) pump, behind ejector (3) aeration, enter membrane module (9) and carry out filtering separation, concentrated solution after the filtration is injected the biochemistry pool central draft tube through circulation force (forcing) pump water outlet shower nozzle (14), make the shower nozzle below form high speed turbulent shear district, the gas that ejector is sucked further is dispersed into tiny bubble, and carry the former water water inlet (this example is pretreated municipal wastewater and simulated domestic wastewater) of shower nozzle below secretly, the combined sewage that oxygen and active sludge are rich in formation flows downward along central draft tube, carries out the high-efficiency aerobic biochemical reaction simultaneously; After the sewage mixed solution arrives reactor bottom, upwards backflow through annular upspout again and arrive the upspout top, most of oxygen is consumed by biochemical reaction in the mixed solution at this moment, wherein a part of mixed solution is jet under shearing again, operation so moves in circles, so, the sewage mixed solution is by oxygenation repeatedly, bubble and microbial bacteria micelle are constantly sheared refinement, and the fine and close tiny flocs unit of formation, carry out efficient biochemical reaction in the reciprocation cycle process, the organic pollution materials in the waste water obtains degraded and removes; Another part mixed solution enters degassing pond, slough the air pocket in the mixed solution, be beneficial to enter the membrane sepn recycle system and carry out jet-flow aeration, simultaneously, mud in the mixed solution has part and sinks at the bottom of the pond, pool bottom sludge backflash with a slope is slipped to the biochemical reaction tank central draft tube through degassing pond, continues to participate in biochemical working cycle; Mixed solution after the degassing and the simple precipitation enters membrane module again and carries out filtering separation behind the supercharging of circulation force (forcing) pump, ejector aeration, filter the back concentrated solution and inject the biochemical next time working cycle of biochemistry pool central draft tube continuation through circulation pressurization pump outlet shower nozzle, membrane filtration sees through liquid and is system's water outlet, and water outlet enters clean water basin (12).Above process is moved continuously, moves in circles, the water and make that organic pollutant is degraded and is purified in the waste water of can realizing being back to back.Membrane module washing unit (10) cleans membrane module as required.
Below be illustrated for example, but claim scope of the present invention is not limited only to this.
| Project | Influent quality | Effluent quality | Degree of treatment (%) |
| COD(mg/L) | 250～450 | ≤15 | ≥80～89.00 |
| PH | 6～9 | 6～9 | / |
| Total phosphorus (mg/L) | 3～6 | ≤0.5 | ≥83.3～87.5 |
| Total nitrogen (mg/L) | 24～45 | ≤15 | ≥40～66.7 |
| Ammonia nitrogen (mg/L) | 20～35 | ≤5 | ≥75～85.7 |
Treatment effect is good and stable, satisfies GB18918-2002 one-level A standard.
| Project | Influent quality | Effluent quality | Degree of treatment (%) |
| COD(mg/L) | 500～600 | ≤40 | ≥90～92.00 |
| PH | 6～9 | 6～9 | / |
| Total phosphorus (mg/L) | 5～8 | ≤0.5 | ≥90～93 |
| Total nitrogen (mg/L) | 30～45 | ≤14 | ≥≥40～66.7 |
| Ammonia nitrogen (mg/L) | 20～25 | ≤5 | ≥75～80 |
Treatment effect is better than GB18918-2002 one-level A standard, and stable water outlet.
Claims (4)
1. Gas feeding jet-flow aeration external membrane bioreactor sewage treatment equipment is characterized in that this equipment is made up of integrated bio reactor (a), Gas feeding jet-flow aeration unit (b) and external membrane separating unit (c).Described integrated bio reactor (a) is made up of two portions: the one, be positioned at the deep aerating biochemical reaction tank (1) of bottom, and the 2nd, superposed degassing pond (2); Center water conservancy diversion inner core is set in the deep aerating biochemical reaction tank, and the water conservancy diversion inner core is for falling the stream pipe, and the circular channel between biochemical reaction tank urceolus and inner core is a upspout.Described Gas feeding jet-flow aeration unit (b) is made up of Gas feeding jet aerator (3), forced gas supply system (16), valve (8), tensimeter (7) and under meter (4) etc.Described external membrane separating unit (c) is made up of external inner pressed membrane module (9), circulation force (forcing) pump (5), membrane module washing unit (10), pipeline, valve (8), instrument (7) and electrical control etc.
2. a kind of Gas feeding jet-flow aeration external membrane bioreactor according to claim 1, it is characterized in that: described Gas feeding jet aerator (b) is furnished with forced gas supply system (16); Before and after the ejector valve is set, is installed on the preceding circulation force (forcing) pump pressure pipe of membrane module, and the bye-pass in parallel (6) of band valve is installed.
3. a kind of Gas feeding jet-flow aeration external membrane bioreactor according to claim 1, it is characterized in that: deep aerating biochemical reaction tank urceolus bottom, described integrated bio reactor (a) bottom is closed and repaiies the garden by the current streamline, center water conservancy diversion inner core open at both ends; The biochemical reaction tank top connects degassing pond (2), and the degassing is provided with the mud backflash at the bottom of the pond, pond, and backflash is with certain slope aspect biochemical reaction tank central draft tube; Circulation force (forcing) pump water sucking mouth (15) is arranged in the degassing pond, and water outlet shower nozzle (14) is downward, is arranged in central draft tube top centre, and raw water inlet is arranged in circulation force (forcing) pump water outlet shower nozzle (14) below.
4. a kind of Gas feeding jet-flow aeration external membrane bioreactor according to claim 1 is characterized in that: the operation scheme of described membrane bioreactor can be carried out the aerobic biochemical reaction for the water of being back to back, continuous aeration; Also can be when the denitrification denitrogenation requirement be arranged, realize being back to back water by the valve on switch ejector and the parallel branch (6) thereof, intermittent aeration, promptly open the ejector valve, close the branch road valve, carry out certain hour aerobic aeration biochemical reaction, close the ejector valve then, spending road valve carries out certain hour anoxic biochemical reaction, reaches the purpose of nitrification and denitrification denitrogenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102730852A CN101941757A (en) | 2010-09-06 | 2010-09-06 | Air supply type jet aerating external membrane bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102730852A CN101941757A (en) | 2010-09-06 | 2010-09-06 | Air supply type jet aerating external membrane bioreactor |
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| CN101941757A true CN101941757A (en) | 2011-01-12 |
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| CN2010102730852A Pending CN101941757A (en) | 2010-09-06 | 2010-09-06 | Air supply type jet aerating external membrane bioreactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863075A (en) * | 2011-07-07 | 2013-01-09 | 河南工业大学 | External membrane bioreactor with self-suction jet nozzle aerating function |
| CN107720947A (en) * | 2017-10-20 | 2018-02-23 | 长沙中联重科环境产业有限公司 | Portable wastewater treatment vehicle |
| CN109292979A (en) * | 2018-11-28 | 2019-02-01 | 重庆天星环保工程有限公司 | A kind of intermittent aerating and film biologic integration water treatment facilities |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2104433A1 (en) * | 1992-08-21 | 1994-02-22 | Henry Behmann | Modular Shipboard Membrane Bioreactor System for Combined Wastewater Stream |
| US7396453B1 (en) * | 2005-04-19 | 2008-07-08 | Procorp Enterprises, Llc | Hydraulically integrated solids/liquid separation system for wastewater treatment |
-
2010
- 2010-09-06 CN CN2010102730852A patent/CN101941757A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2104433A1 (en) * | 1992-08-21 | 1994-02-22 | Henry Behmann | Modular Shipboard Membrane Bioreactor System for Combined Wastewater Stream |
| US7396453B1 (en) * | 2005-04-19 | 2008-07-08 | Procorp Enterprises, Llc | Hydraulically integrated solids/liquid separation system for wastewater treatment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863075A (en) * | 2011-07-07 | 2013-01-09 | 河南工业大学 | External membrane bioreactor with self-suction jet nozzle aerating function |
| CN107720947A (en) * | 2017-10-20 | 2018-02-23 | 长沙中联重科环境产业有限公司 | Portable wastewater treatment vehicle |
| CN109292979A (en) * | 2018-11-28 | 2019-02-01 | 重庆天星环保工程有限公司 | A kind of intermittent aerating and film biologic integration water treatment facilities |
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Open date: 20110112 |