CN102079570A - Extracellular polymeric substance (EPS) resolution method - Google Patents
Extracellular polymeric substance (EPS) resolution method Download PDFInfo
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- CN102079570A CN102079570A CN2010105989731A CN201010598973A CN102079570A CN 102079570 A CN102079570 A CN 102079570A CN 2010105989731 A CN2010105989731 A CN 2010105989731A CN 201010598973 A CN201010598973 A CN 201010598973A CN 102079570 A CN102079570 A CN 102079570A
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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 relates to an extracellular polymeric substance (EPS) resolution method which mainly comprises the following steps: cation resin, which is 2.5 times of the total quantity of dry sludge, is respectively filled into a plurality of EPS resolution device shells, and the EPS resolution device shells are fixed on an MBR (membrane bioreactor) through buckles; in the normal operation process of the MBR, cations in the medium react with H<+> radicals in the resin in a replacement mode to increase the acidity of the medium, so that the basic skeleton-filamentous bacteria of the sludge floccule is decomposed; and under the action of the shearing force generated by the turbulent fluctuation of the water flow, the EPS is transferred into water from the membrane threads and the surfaces of the microbes, thereby achieving the goals of preventing and treating membrane pollution.
Description
Technical field
The invention belongs to technical field of sewage, relate to the stifled method of extracellular polymeric (EPS) that realizes alleviating the film silk,, improve water production rate, reduce device auxiliary water ratio, dosing and operation energy consumption to prolong the continuous operating time of membrane reactor.
Background technology
Along with the gradually attention of China to environment protection, emission standard and advanced treatment of wastewater reclamation rate improve constantly, membrane technique in the application of sewage treatment area more and more widely, MBR membrane bioreactor dominate wherein.
(Membrane Bioreactor MBR) handles in the operational management of various waste water, and membrane pollution problem is one of factor of restriction MBR application always adopting membrane bioreactor.Extracellular polymeric EPS (Extracellular Polymeric Substance) is if be microbial host bacterium excretory products of cellular metabolism or aqtocytolysis thing in the active sludge under certain environment, account for 50%～90% of total organic matter in the active sludge, its composition comprises protein, polysaccharide, soil ulmin and nucleic acid etc., and protein and polysaccharide occupy great majority.That EPS can form is three-dimensional, similar gels, height aquation and charged floc-matrix, microorganism is embedded in the flco the inside, and keeps the integrity of flco 26S Proteasome Structure and Function, the increase of EPS content can cause more serious film to pollute, cause the resistance of film to rise, produce water flux and descend.
Summary of the invention
The objective of the invention is to propose extracellular polymeric (EPS) analytic method and device, especially MBR technology extracellular polymeric (EPS) analytic method, the acidity of utilizing resin cation (R.C.) to cement out strengthens the electronegativity of Sludge Surface, under the effect of flow shear, thread fungus is dismissed, mud peels off from the film silk, and EPS is discharged in the water, thereby solves the film pollution problems.
Technical scheme of the present invention is: the extracellular polymeric analytic method, and be about to EPS and be discharged into method the water from the mud flco, comprise the steps: to adopt the resin cation (R.C.) of filling to contact with the liquid medium of MBR film processing in the pond; Sludge concentration is controlled at about 8000 ± 2000mg/L in the MBR pond, and the loadings of resin cation (R.C.) is 1-2.5 a times of dewatered sludge amount in the pond; By adjusting flooding quantity and MBR pond in the reflux ratio of leading portion biological tank, the actual residence time is controlled at 4 ± 1h to the liquid medium that the MBR film is handled in the pond; Regeneration in the every 6-8 of resin days 1 time.
Be provided with extracellular polymeric (EPS) resolver, this device is made module and is installed on the pond of MBR film processing, is convenient to dismounting, changes and assembling; The usage quantity of control resin cation (R.C.) guarantees to satisfy the acidity requirement that EPS resolves on the basis of microorganism active; By the actual residence time of mud quantity of reflux control agent, guarantee the Best Times that EPS resolves to be needed; Utilize the aeration source of the gas of MBR device to make the medium turbulent fluctuation, the shearing force that EPS resolves to be needed is provided; Extracellular polymeric (EPS) resolver modularization is installed on the MBR film device framework with buckle, is convenient to dismounting, changes and assembling.
Especially control that dewatered sludge total amount ratio is 2.5:1 in resin cation (R.C.) and the pond, separate out H when displacement takes place for medium intermediate ion and resin
+After, both satisfied that thread fungus was decomposed, be unlikely to make the deactivated acidity requirement of microorganism again.
Increase the anaerobic technique section before the MBR technology, create the necessary phosphorus environment of releasing of biological phosphate-eliminating on the one hand, also can take to regulate the actual residence time of mud quantity of reflux control agent in the pond simultaneously, satisfy the time requirement that EPS resolves.Utilize the medium turbulent fluctuation that forms in the MBR aeration process to produce shearing force, make EPS break away from film silk surface and be discharged in the medium, need not additionally to increase whipping device.
The present invention adopts pneumatic blending that shearing force is provided, and utilizes Zeo-karb can dissociate positively charged ion (as hydrogen ion H in solution
+), with solution metal ion or other positively charged ion generation mutual exchanging actions.Can reduce cationic molar mass concentration on the one hand, make solution be acid on the other hand, cause the Sludge Surface electronegativity to strengthen; Improve the reproducibility and the extraction yield of cation exchange resin processes, make the EPS in the MBR device obtain cleaning, the rate of decay that reduces the film running resistance and produce water flux.
The invention has the beneficial effects as follows: 1, because of most of EPS breaks away from from the film silk, the film device running resistance reduces, and average current drain is reduced to 0.32 ~ 0.39kW.h/ton water from 0.40 ~ 0.50kW.h/ ton water, reduces by 15 ~ 20% approximately; 2, because of the fenestra cumulative area of being stopped up by EPS is little, under the operational conditions with equipressure and water production rate, the water backwash cycle of membrane module extended to 57 seconds by 30 seconds; 3, because of the fenestra cumulative area of being stopped up by EPS is little, under the operational conditions with equipressure and water production rate, the maintainability medicament backwash cycle extends to 1 time/week by 2 times/week; 4, reduce because of the medicament backwash frequency, the film silk is oxidized and probability damage diminishes, and the film silk life-span prolongs.
Description of drawings
Fig. 1 is the structural representation of the EPS resolver that uses of the present invention
Gas-liquid separator 1, clip 2, resin extender 3, nylon wire 4, housing 5, supporting plate 6.
Embodiment
Referring to Fig. 1 EPS resolver: fixed installation is filled with the plexi-glass tubular of resin cation (R.C.) on MBR membrane module framework, the even cloth of plexi-glass tubular hole, keep resin contact, pass through adjustment flooding quantity and MBR pond with medium, the actual residence time of MBR pond is controlled at 4h in the reflux ratio of leading portion biological tank; Resin is regenerated weekly 1 time.
1) device assembling: according to dewatered sludge total amount in the MBR pond, according to 2.5 times amount, load resin cation (R.C.) in resolver, resin can divide a plurality of housings to load, and is control criterion with the resin total amount.After resin is filled and is finished, the closed upper portion top cover, and gas-liquid separator is installed on top cover, gas-liquid separator is with screwed connection.After finishing, filling directly is connected with the film device framework by clip.
2) device operation: in the MBR film device operational process, mud mixture by housing and nylon wire after, contact the Ca in the water with resin cation (R.C.)
2+, Mg
2+Deng positively charged ion with the H in the resin
+Cement out, make acidity increase in the water, mud skeleton thread fungus is subjected to acidity variation and pneumatic blending to produce the influence of shearing force and decomposes, mud granule is discrete gradually, the microorganism of mud flco inside fully contacts with medium and the EPS on surface is discharged in the water, flow out MBR pond body with water, avoid a large amount of EPS, reach and alleviate the purpose that film pollutes attached to film silk surface.In order to guarantee EPS segregation effect,, the actual residence time of MBR pond is controlled at more than the 4h by adjusting flooding quantity and MBR pond in the reflux ratio of leading portion biological tank.
3) EPS resolver regeneration: after the MBR device moves a week, dismounting is fixed on the EPS resolver on the membrane module, the intravital resin of shell is replaced by fresh resin after the regeneration, reinstalls on the membrane module framework, the resin of inefficacy is concentrated regeneration back recycle outside the pond.The EPS resolver regeneration period can be adjusted according to practical effect.
Design 10m
3MBR waste disposal plant 1 cover of/h processing power is installed on newly-built residential quarters, is water inlet with the community life sewage, and the effluent reuse after the processing is to the subdistrict greening water.
The device flow process is followed successively by sediment by rotational flow, anaerobic pond, MBR pond, design theory residence time 8.4h, reflux ratio 100%, sludge concentration 8000mg/L, 1.7 tons of (about 1.4m of EPS resolver resin loadings
3), be divided into 20 EPS resolvers, EPS resolver diameter 250mm, resin loading height 1.5m.
Device moved through 60 days, 14400 tons of co-processing sanitary sewages, and the total power consumption variable of treatment unit is 5241.6kW.h, and the conversion average current drain is a 0.364kW.h/ ton water, and the water backwash cycle is 54 seconds.
At water inlet COD ≈ 230mg/L, under the situation of BOD ≈ 100mg/L, stable water outlet reaches one-level A standard, not increasing the preceding power consumption of EPS resolver is 0.430kW.h/ ton water, reduce about 18% after increasing the EPS resolver, the backwash cycle extended to 54 seconds by 38 seconds, produced water flux and satisfied the processing power requirement, illustrated that EPS resolver control film pollution effects is good.
Design 10m
3MBR waste disposal plant 1 cover of/h processing power is installed on newly-built residential quarters, is water inlet with the community life sewage, and the effluent reuse after the processing is to the subdistrict greening water.
The device flow process is followed successively by sediment by rotational flow, anaerobic pond, MBR pond, design theory residence time 7.8h, reflux ratio 80%, sludge concentration 8000mg/L, 1.7 tons of (about 1.4m of EPS resolver resin loadings
3), be divided into 20 EPS resolvers, EPS resolver diameter 250mm, resin loading height 1.5m.
Device moved through 60 days, 12528 tons of co-processing sanitary sewages, and the total power consumption variable of treatment unit is 4647.9kW.h, and the conversion average current drain is a 0.371kW.h/ ton water, and the water backwash cycle is 61 seconds.
At water inlet COD ≈ 193mg/L, under the situation of BOD ≈ 100mg/L, stable water outlet reaches one-level A standard, not increasing the preceding power consumption of EPS resolver is 0.448kW.h/ ton water, reduce about 17.2% after increasing the EPS resolver, the backwash cycle extended to 61 seconds by 35 seconds, produced water flux and satisfied the processing power requirement, illustrated that EPS resolver control film pollution effects is good.
Design 15m
3MBR waste disposal plant 1 cover of/h processing power is installed on newly-built residential quarters, is water inlet with the community life sewage, and the effluent reuse after the processing is to the subdistrict greening water.
The device flow process is followed successively by sediment by rotational flow, anaerobic pond, MBR pond, design theory residence time 7.8h, reflux ratio 80%, sludge concentration 8000mg/L, 2.6 tons of (about 2.1m of EPS resolver resin loadings
3), be divided into 30 EPS resolvers, EPS resolver diameter 250mm, resin loading height 1.5m.
Device moved through 60 days, 20160 tons of co-processing sanitary sewages, and the total power consumption variable of treatment unit is 7721.3kW.h, and the conversion average current drain is a 0.383kW.h/ ton water, and the water backwash cycle is 51 seconds.
At water inlet COD ≈ 217mg/L, under the situation of BOD ≈ 110mg/L, stable water outlet reaches one-level A standard, not increasing the preceding power consumption of EPS resolver is 0.461kW.h/ ton water, reduce about 16.9% after increasing the EPS resolver, the backwash cycle extended to 51 seconds by 32 seconds, produced water flux and satisfied the processing power requirement, illustrated that EPS resolver control film pollution effects is good.
By embodiment as can be known, EPS analytic method disclosed by the invention is effective aspect the pollution of solution MBR film, can reduce the power consumption and the backwash frequency of MBR device preferably, alleviates medicament to film silk oxidative damage, prolongs the work-ing life of membrane element.The large-scale promotion of present technique is used, and is significant.
Claims (5)
1. the extracellular polymeric analytic method is characterized in that comprising the steps: to adopt the resin cation (R.C.) of filling to contact with the liquid medium of MBR film processing in the pond; Sludge concentration is controlled at about 8000 ± 2000mg/L in the MBR pond, and the loadings of resin cation (R.C.) is 1-2.5 a times of dewatered sludge amount in the pond; By adjusting flooding quantity and MBR pond in the reflux ratio of leading portion biological tank, the actual residence time is controlled at 4 ± 1h to the liquid medium that the MBR film is handled in the pond; Regeneration in the every 6-8 of resin days 1 time.
2. extracellular polymeric analytic method according to claim 1 is characterized in that controlling that dewatered sludge total amount ratio is 2.5:1 in resin cation (R.C.) and the pond.
3. extracellular polymeric analytic method according to claim 1 is characterized in that increasing the anaerobic technique section before the MBR technology.
4. extracellular polymeric analytic method according to claim 1 is characterized in that utilizing the medium turbulent fluctuation that forms in the MBR aeration process to produce shearing force, makes EPS break away from film silk surface and is discharged in the medium.
5. extracellular polymeric (EPS) resolver, it is characterized in that on MBR membrane module framework, fixedly mounting the plexi-glass tubular that is filled with resin cation (R.C.), the even cloth of plexi-glass tubular hole, keep resin to contact with medium, this device is made module and is installed on the pond of MBR film processing, extracellular polymeric (EPS) resolver modularization is installed on the MBR film device framework with buckle, is convenient to dismounting, changes and assembling.
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| CN2010105989731A CN102079570A (en) | 2010-12-22 | 2010-12-22 | Extracellular polymeric substance (EPS) resolution method |
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| CN2010105989731A CN102079570A (en) | 2010-12-22 | 2010-12-22 | Extracellular polymeric substance (EPS) resolution method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776522A (en) * | 2016-04-29 | 2016-07-20 | 中国科学院生态环境研究中心 | Sewage treatment system and method for strengthening fast transfer of organic matters |
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| CN85100261A (en) * | 1985-04-01 | 1986-07-16 | 武汉大学 | Device for purifying potable water |
| US20040118767A1 (en) * | 1995-08-11 | 2004-06-24 | Henry Behmann | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| CN1509801A (en) * | 2002-12-26 | 2004-07-07 | 天津工业大学膜科学与技术研究所 | Immersing hollow fibre membrane assembly |
| CN201092550Y (en) * | 2007-07-05 | 2008-07-30 | 邹振生 | Double-film type water treatment technical apparatus |
| CN101306877A (en) * | 2008-05-30 | 2008-11-19 | 哈尔滨工业大学 | Process for treating sewerage by combined film bioreactor |
| CN101555064A (en) * | 2009-05-14 | 2009-10-14 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | Filled membrane biological processor |
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2010
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Patent Citations (6)
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| CN85100261A (en) * | 1985-04-01 | 1986-07-16 | 武汉大学 | Device for purifying potable water |
| US20040118767A1 (en) * | 1995-08-11 | 2004-06-24 | Henry Behmann | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes |
| CN1509801A (en) * | 2002-12-26 | 2004-07-07 | 天津工业大学膜科学与技术研究所 | Immersing hollow fibre membrane assembly |
| CN201092550Y (en) * | 2007-07-05 | 2008-07-30 | 邹振生 | Double-film type water treatment technical apparatus |
| CN101306877A (en) * | 2008-05-30 | 2008-11-19 | 哈尔滨工业大学 | Process for treating sewerage by combined film bioreactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776522A (en) * | 2016-04-29 | 2016-07-20 | 中国科学院生态环境研究中心 | Sewage treatment system and method for strengthening fast transfer of organic matters |
| CN105776522B (en) * | 2016-04-29 | 2018-10-30 | 中国科学院生态环境研究中心 | Strengthen the sewage disposal system and method for organic matter fast transfer |
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Application publication date: 20110601 |