CN1884130A - Low-power membrane bioreactor - Google Patents
Low-power membrane bioreactor Download PDFInfo
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- CN1884130A CN1884130A CNA2006100144499A CN200610014449A CN1884130A CN 1884130 A CN1884130 A CN 1884130A CN A2006100144499 A CNA2006100144499 A CN A2006100144499A CN 200610014449 A CN200610014449 A CN 200610014449A CN 1884130 A CN1884130 A CN 1884130A
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- aeration
- pump
- hollow fiber
- water
- fiber film
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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
Abstract
The invention discloses a low-energy film-consuming biological reactor, which consists of biological disposal system and automatic control system, wherein the biological disposal system is composed of hollow fiber film component, piercing aeration pipe, inlet and outlet pump, aeration pump, pressure meter; the automatic control system is composed of level gauge, time relay, A/D-D/A-I/O conversion device, PC set, converter. The gas-water rate in two steps is set under premise of sucking and down time at 40:1-50:1, which produces stable film water outlet. The invention can reduce aerating energy consumption effectively through allocating different segments of gas-water rate, which stabilizes film flux.
Description
Technical field
The present invention relates to a kind of middle water recycling processing technique, belong to the design that membrane bioreactor (MBR) is optimized aeration mode or rather.
Background technology
Shortage of water resources and water pollution condition are serious day by day, and how making sewage become a kind of resource becomes problem demanding prompt solution, and middle water reuse is a core content of implementing sewage recycling.Advantages such as membrane bioreactor (MBR) is the sewage disposal new technology that one is made in membrane sepn and biological degradation, handles with traditional biological and compares, and this technology has the contaminant removal efficiency height, effluent quality is good and stablize, the excess sludge generation is few.Has bright development prospect.Though MBR technology have traditional technology incomparable advantage, still, it still is a key factor that influences this Technological Economy and operation stability that film pollutes.Particulate, colloidal particle or solute macromole and film in the feed liquid that the film pollution is meant with film contacts exist physics, chemistry, biochemical action or mechanical effect, cause the accumulation of face or fenestra internal adsorption, deposition and microorganism at the film water interface, cause membrane pore size to diminish or stop up, the phenomenon that film is produced see through flow and stalling characteristic to reduce significantly.Studies show that the principal element that influences the film pollution has the bacterium of breeding in mud flco, solvability macromole, fine colloidal particle and the fenestra.
In the MBR operational process, must keep certain film driving pressure, thereby membrane module to be polluted inevitably; Because the existence that film pollutes, make the energy loss-rate traditional biological treatment process height of MBR.MBR is in service in order to obtain stable membrane flux, adopts the mode that strengthens aeration intensity to improve this situation usually, and a large amount of datas show that aeration energy consumption accounts for more than 80% of total energy consumption of MBR operation.The aeration form of tradition MBR adopts the constant aeration intensity usually, promptly sets gas-water ratio (normally 40: 1～100: 1) in the whole service process, relies on lasting aeration to improve face liquid circulation flow velocity, reduces the deposition of mud on the film surface.The tradition aeration mode has increased aeration energy consumption on the one hand, has improved product water cost; Owing to the aeration effect that continues, not only destroyed the structure of biological floe in the reactor on the other hand, also changed the particulate size-grade distribution simultaneously, but made the mud mixed liquid sedimentation partly reduce, the reduction of flco size produces a large amount of biological little wadding colloidal particles.Tiny colloidal particle and solvability partly increase, and have increased the chance that fenestra stops up, and have aggravated the process that film pollutes.The present invention proposes new MBR technology aeration mode, according to the MBR technology characteristics of water outlet intermittently, suction with rest two stages corresponding different aeration intensity be provided respectively, in the hope of with lower cost, obtain satisfied film and pollute the control effect.
Summary of the invention
The objective of the invention is to propose a kind of low-power membrane bioreactor, adopt aeration mode to reduce film and pollute, keep stable membrane flux, reduce the product water cost of MBR technology with automatic controlled function.
The present invention is achieved by the following technical programs: membrane bioreactor (MBR) comprises that biological treatment system and automatic control system two portions constitute.Solid line among Fig. 1 is represented the equipment connecting pipeline; Dotted line is represented control signal wire.Biological treatment system by hollow fiber film assembly 1, boring aeration pipe 2, intake pump 3, go out water pump 4, aeration pump 5, tensimeter 6 and form.Boring aeration pipe 2 is positioned at hollow fiber film assembly 1 below, goes out water pump 4 imports and is connected to hollow fiber film assembly 1.Aeration pump 5 exit end are connected to boring aeration pipe 2.Automatic control system is made up of liquidometer 7, the time relay 8, A/D-D/A-I/O transfer equipment 9, PC 10, frequency transformer 11.The liquid level high-low signal of liquidometer 7 outputs imports A/D-D/A-I/O transfer equipment 9 into, controls the output rating of intake pump 3 by A/D-D/A-I/O transfer equipment 9, so that adjust the flooding velocity of pending water.Hollow fiber film assembly 1 adopts the negative pressure water-out manners during operation, by the suction and the unemployed time of the time relay 8, the 9 controlling diaphragm water outlets of A/D-D/A-I/O transfer equipment, aspirating and resting two different working stages, A/D-D/A-I/O transfer equipment 9 is adjusted the aeration rate of aeration pump 5 with PC 10 by control of conversion device 11, and then changes aeration intensity.But this design of automatic control system is energy efficient both, can reduce the shearing action of big aeration intensity to the mud feed liquid again.Its film surface of aspiration procedure in MBR technology operational process forms negative pressure, and a large amount of pollutents will be attached on the film surface, form pollution layer.Because the effect of film surface negative pressure is even make bigger aeration intensity also can't effectively wash away the pollution layer on film surface.Negative pressure in the stage of resting owing to the film surface disappears, thereby provides certain aeration intensity can effectively remove the pollution layer on film surface, obtains stable membrane flux.The present invention is under the prerequisite of suction and setting unemployed time, and the suction stage gas-water ratio is 20: 1～30: 1, and the stage gas-water ratio of resting is 40: 1～50: 1, by distributing two different gas-water ratios of stage, can effectively reduce aeration energy consumption.
Description of drawings
Accompanying drawing 1 is each parts connection diagram of apparatus of the present invention.
Accompanying drawing 2 is that transmembrane pressure (TMP) is with taking out/have a rest the cycle variation diagram.
Implement concrete mode
The present invention is described further by embodiment below in conjunction with accompanying drawing.The biological treatment system structure of low-power membrane bioreactor is: hollow fiber film assembly 1 is immersed in the reactor, under the 3cm place be provided with boring aeration pipe 2.Pending water enters reactor through intake pump 3 and carries out biochemical degradation, and the water after the biochemical treatment filters through hollow fiber film assembly 1, by going out water pump 4 discharge systems.Aeration pump 5 provides oxygen for biochemical treatment and improves the cross-flow flow velocity (as Fig. 1) of hollow fiber film assembly 1.Hollow fiber film assembly 1 film silk material is polyvinylidene difluoride (PVDF) (PVDF), and the effective pore radius of film is 0.1-0.2 μ m; Water flow 12L/h.The former water of embodiment is the simcity sanitary sewage, and chemical oxygen demand (COD) (COD) is 230～400mg/L.Suction stage gas-water ratio and the design variable of stage gas-water ratio of resting see Table 1.
Fig. 2 demonstrates transmembrane pressure (TMP) with the variation of aspirating, resting working time.Test-results shows: moving in 10 cycles, membrane resistance fluctuates between 15～25kPa in the aspiration procedure, and through the empty aeration of 3min, membrane resistance is reduced to about 3kPa, as seen for suction, rest two stages different aeration intensities be provided, can effectively obtain stable membrane flux.Usually adopt the membrane bioreactor of (gas-water ratio is 40: 1) to compare in this plant energy consumption and the engineering, produce the water cost and on the aeration expense, save 40%, as seen reduced energy consumption by designing different aeration intensities, reduced product water cost, compare with the design of conventional film bio-reactor aeration, tangible promotion advantage is arranged.
Beneficial effect of the present invention is: according to the MBR technology characteristics of water outlet intermittently, suction with stop pumping phases different aeration intensities be provided respectively, can effectively reduce aeration energy consumption, can under lower energy consumption, obtain stable membrane flux on the one hand; The negative impact of having avoided big aeration intensity that the mud mixed liquid filtrability is caused on the other hand, thereby can further promote the application of membrane bioreactor (MBR), thus improve the utilization ratio of water resources, alleviate the present situation of water resources anxiety.
Table 1 automatic control design variable
| Setup parameter | Suction | Rest |
| Time (min) | 12 | 3 |
| Gas-water ratio | 20∶1 | 40∶1 |
Claims (2)
1. low-power membrane bioreactor, comprise hollow fiber film assembly (1), boring aeration pipe (2), intake pump (3), go out water pump (4), aeration pump (5), tensimeter (6), liquidometer (7), the time relay (8), A/D-D/A-I/O transfer equipment (9), PC (10), frequency transformer (11), it is characterized in that described low-power membrane bioreactor is made of biological treatment system and automatic control system two portions, biological treatment system is by hollow fiber film assembly (1), boring aeration pipe (2), intake pump (3), go out water pump (4), aeration pump (5), tensimeter (6) is formed, boring aeration pipe (2) is positioned at hollow fiber film assembly (1) below, go out water pump (4) import and be connected to hollow fiber film assembly (1), aeration pump (5) exit end is connected to boring aeration pipe (2), automatic control system is by liquidometer (7), the time relay (8), A/D-D/A-I/O transfer equipment (9), PC (10), frequency transformer (11) is formed, the liquid level signal of liquidometer (7) output is through A/D-D/A-I/O transfer equipment (9) control intake pump (3), hollow fiber film assembly (1) adopts the negative pressure water-out manners, by the time relay (8), the suction and the unemployed time of A/D-D/A-I/O transfer equipment (9) controlling diaphragm water outlet, aspirating and resting two different working stages, A/D-D/A-I/O transfer equipment (9) and the aeration rate of PC (10) by control of conversion device (11) adjustment aeration pump (5).
2. according to the described low-power membrane bioreactor of claim 1, it is characterized in that it is 20: 1～30: 1 that described aeration pump (5) provides gas-water ratio in suction stage, have a rest and stop the stage gas-water ratio is provided is 40: 1～50: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100144499A CN100371264C (en) | 2006-06-26 | 2006-06-26 | Low-power membrane bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100144499A CN100371264C (en) | 2006-06-26 | 2006-06-26 | Low-power membrane bioreactor |
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| Publication Number | Publication Date |
|---|---|
| CN1884130A true CN1884130A (en) | 2006-12-27 |
| CN100371264C CN100371264C (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100144499A Expired - Fee Related CN100371264C (en) | 2006-06-26 | 2006-06-26 | Low-power membrane bioreactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449612A (en) * | 2013-07-26 | 2013-12-18 | 东南大学 | Reactor used for obtaining high-concentration yeast to quickly remove wastewater COD (chemical oxygen demand) |
| CN103708606A (en) * | 2013-12-31 | 2014-04-09 | 北京清大国华环保科技有限公司 | Pulsed energy-saving MBR (membrane bioreactor) method and device |
| CN110746051A (en) * | 2019-11-19 | 2020-02-04 | 东北电力大学 | Membrane bioreactor device utilizing iron-based water treatment material for cooperative regulation and control |
| CN111777172A (en) * | 2020-07-17 | 2020-10-16 | 杭州易膜环保科技有限公司 | Low-energy-consumption MBR (membrane bioreactor) operation method for dynamically controlling thickness of filter cake layer on membrane surface |
| CN111792730A (en) * | 2020-07-27 | 2020-10-20 | 浙江工业大学 | Method for controlling membrane pollution of anaerobic membrane bioreactor with low energy consumption |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515194Y (en) * | 2001-11-23 | 2002-10-09 | 王跃进 | Integrated film biological reactor |
| CN2558648Y (en) * | 2002-06-14 | 2003-07-02 | 厦门大学 | Autocontrolling device for integral immersed membrane bioreator |
| CN1724392A (en) * | 2005-06-03 | 2006-01-25 | 天津大学 | Low-speed film filtering reactor |
-
2006
- 2006-06-26 CN CNB2006100144499A patent/CN100371264C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449612A (en) * | 2013-07-26 | 2013-12-18 | 东南大学 | Reactor used for obtaining high-concentration yeast to quickly remove wastewater COD (chemical oxygen demand) |
| CN103708606A (en) * | 2013-12-31 | 2014-04-09 | 北京清大国华环保科技有限公司 | Pulsed energy-saving MBR (membrane bioreactor) method and device |
| CN103708606B (en) * | 2013-12-31 | 2017-11-17 | 北京清大国华环境股份有限公司 | A kind of pulse energy saving formula MBR method and apparatus |
| CN110746051A (en) * | 2019-11-19 | 2020-02-04 | 东北电力大学 | Membrane bioreactor device utilizing iron-based water treatment material for cooperative regulation and control |
| CN111777172A (en) * | 2020-07-17 | 2020-10-16 | 杭州易膜环保科技有限公司 | Low-energy-consumption MBR (membrane bioreactor) operation method for dynamically controlling thickness of filter cake layer on membrane surface |
| CN111792730A (en) * | 2020-07-27 | 2020-10-20 | 浙江工业大学 | Method for controlling membrane pollution of anaerobic membrane bioreactor with low energy consumption |
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| CN100371264C (en) | 2008-02-27 |
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Granted publication date: 20080227 |