CN101898845A - Wastewater treatment process - Google Patents
Wastewater treatment process Download PDFInfo
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- CN101898845A CN101898845A CN2009100273277A CN200910027327A CN101898845A CN 101898845 A CN101898845 A CN 101898845A CN 2009100273277 A CN2009100273277 A CN 2009100273277A CN 200910027327 A CN200910027327 A CN 200910027327A CN 101898845 A CN101898845 A CN 101898845A
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- membrane
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- waste water
- activated carbon
- treatment process
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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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- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a wastewater treatment process. In the process, after wastewater is biologically treated in an aeration tank containing active slurry, the active slurry is subjected to solid-liquid separation through a separation membrane to obtain primary treated water; the primary treated water is further treated through a reverse osmosis membrane to obtain secondary treated water, wherein powdered active carbon is dosed into the aeration tank in biochemical treatment. In the process of reusing the wastewater by an MBR and RO process combined membrane integration system, the powder active carbon is dosed into the aeration tank to absorb partial organics hard to degrade and soluble microbial metabolin to improve slurry filtration performance, reduce developing trend of MBR membrane pollution, further reduce content of organics in MBR effluent at the same time, and effectively relieve generation of RO membrane organic pollution, so that the operation stability of the membrane integration system can be improved. The method has the advantages of simple operation management, small investment, quick response and low operation cost, and is convenient for popularization and application.
Description
Technical field
The invention belongs to sewage disposal and reuse field, relate to the novel process of a kind of binding film technology and materialization treatment technology Treatment for Reuse waste water.
Background technology
Membrane technique is described as the most promising water technology of 21 century, as a kind of new separation technology, membrane separation technique can effectively purify waste water, can reclaim some useful matteies again, have characteristics such as energy-conservation, no phase transformation, equipment be simple, easy to operate simultaneously, therefore in wastewater treatment, obtained using widely and having shown vast potential for future development.According to the size of membrane pore size, the separatory membrane of using in wastewater treatment mainly contains micro-filtration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO).
Recently in year, diversified film combination process is more and more paid close attention to, and this is the advantage that can bring into play various membrane techniquies owing to the film integrated system that different types of film is combined, forms the novel process of waste water advanced processing.Especially " two embrane method " waste water recycling treatment technology of combining with reverse osmosis (RO) system of membrane bioreactor (MBR), can remedy the deficiency of independent MBR technology and RO technology, giving full play to its effect, will be a new direction of waste water advanced processing and reuse.
In MBR+RO film integrated system, MBR is a kind of novel, the sewage treatment technique efficiently that membrane separation technique is combined with biologic treating technique.Separatory membrane in the MBR system can adopt ultrafiltration or microfiltration membrane, and almost completely trapped particles thing and bacterium make the effluent quality of MBR be better than traditional waste water treatment process greatly, and possess lower sludge yield and littler advantages such as floor space.Simultaneously, the MBR water outlet can further be held back organic substance, ion, hardness and metallics etc. by the RO film, thereby the MBR treating water is carried out advanced treatment directly as the water inlet of RO film, reaches the purpose of cycling utilization of wastewater.
Although MBR+RO film integrated system has successfully overcome the purpose that the traditional wastewater treatment technology is difficult to degree of depth Treatment for Reuse waste water, but be difficult to the dissolved organic matter of being degraded by microbial biochemical owing to often contain some in the waste water, make that the strainability of mud is relatively poor, cause that easily the MBR film pollutes.Simultaneously, this part dissolved organic matter can see through the MBR film, causes the organic concentration in the MBR water outlet still higher, thereby influences the operation stability of follow-up RO system.
For film processing system, the film pollution can cause the decline of membrane flux and the raising of operating pressure, and this just requires film is carried out matting, to recover the operating performance of film.Frequent matting not only increases the consumption of chemical agent and strengthens the operational administrative difficulty, and influences the work-ing life of film, shortens the replacement cycle of membrane module, thereby increases investment running cost.
Therefore, for promoting the widespread use of membrane technique, press for and improve film integrated system operating performance, promptly in the operational process of film integrated system, by the development trend of decelerating membrane pollution as far as possible of adopting an effective measure, reduce the cleaning frequency of film, prolong the cleaning interval of film, thereby improve the operation stability of film.
Summary of the invention
Technical problem to be solved by this invention is: in the process at existing membrane technique Treatment for Reuse waste water, film is seriously polluted, and the situation of system's operation stability difference provides a kind of effective binding film technology and materialization treatment technology, novel process simple to operate, that running cost is low.
Purpose of the present invention can reach by following measure:
A kind of waste water treatment process, after it is characterized in that the biological reaction tank of waste water through containing active sludge carries out biochemical treatment, by separatory membrane this active sludge is carried out solid-liquid separation and obtains treating water 1 time, this 1 treating water enters reverse osmosis membrane again carry out advanced treatment after, obtain treating water 2 times; Wherein in described biological reaction tank, add Powdered Activated Carbon during biochemical treatment.
The dosing method of the Powdered Activated Carbon among the present invention is that Powdered Activated Carbon directly is added in the biological reaction tank, and according to the volume of active sludge in the biological reaction tank, adding concentration is 300mg/L～1500mg/L.When biological reaction tank discharging active sludge,, add Powdered Activated Carbon according to the volume of the active sludge that is discharged.Add the amount of Powdered Activated Carbon,, be 300mg/L～1500mg/L according to the volume of the active sludge that is discharged.
In biological reaction tank, after adding Powdered Activated Carbon, can an absorption part in biochemical reaction process, be difficult to organic pollution materials, solvability microbial metabolites and the bacterial extracellular polymer thing etc. that are degraded by microorganisms, and separated film interception, thereby reduce the content of above-mentioned pollution substance in the mud supernatant liquor, reduce the blocked probability of fenestra; Simultaneously,, improved the sludge filtration performance, effectively slowed down the development trend that the MBR film pollutes because the absorption and the cohesion of Powdered Activated Carbon make the particle diameter of active sludge floc particle become big.
And, because the synergy between Powdered Activated Carbon and the MBR, make the organic content in the MBR water outlet reduce greatly, when the MBR water outlet enters the RO film when further holding back pollution substance, ion, hardness and metallics, can effectively slow down absorption and the deposition of organism on RO film surface, reduce the generation probability of RO film organic contamination, thereby improve the operation stability of RO system.
The form of the separatory membrane among the present invention is hollow-fibre membrane or flat sheet membrane, is preferably flat sheet membrane.Flat sheet membrane adopts special glue and advanced adhering technique that two dull and stereotyped diaphragms are sticked on the both sides of back up pad, thereby guarantees that film possesses very strong physical strength, erosion resistance and chemical resistance in the vacuum take-off process.Just be based on this special structure and film adhering technique, can effectively avoiding diaphragm in use to occur leaking, and avoid the similar fracture of wire phenomenon that occurs on the hollow-fibre membrane.
The material of the separatory membrane among the present invention is a polyvinylidene difluoride (PVDF), and the mean value of the fine pore that the surface distributed of separatory membrane is 0.04～0.40 μ m, is preferably 0.08～0.40 μ m.
Reverse osmosis membrane among the present invention is the resistance to crocking reverse osmosis membrane, and the surface charge of reverse osmosis membrane is electric neutrality, has low pressure operation, water production rate height, ratio of desalinization height, advantage that anti-fouling performance is good.Its objective is the hardness, ion and the metallics that are used for removing the MBR water outlet, further hold back simultaneously and be partly dissolved organic matter matter, COD, nitrogen, phosphorus etc., guarantee that effectively RO produces water and satisfies the reuse requirement.
Add gac in biological reaction tank, an absorption part is difficult to the organism and the solvability microbial metabolites of biochemical degradation, alleviates the development trend that the MBR film pollutes.And MBR system and RO system are independently cut apart separately, because the stack of MBR and gac, make that organic content reduces in the MBR water outlet, thereby slow down the generation of follow-up RO film organic contamination, the operation stability of raising RO system greatly.Present method operational administrative is simple, invest little, instant effect, working cost is low, and is easy to utilize.
Embodiment
Embodiment 1
Adopt MBR+RO technology Treatment for Reuse sanitary sewage, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.08 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 300mg/L adds Powdered Activated Carbon 9kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Active sludge is then in replenishing Powdered Activated Carbon 0.3kg ratio every day of 300mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.13kPa/d, MBR water outlet COD
CrBe 18mg/L, the RO membrance chemistry cleaning interval is 5 months.
Embodiment 2
Adopt MBR+RO technology Treatment for Reuse dyeing waste water, wherein the separatory membrane in the MBR system is a hollow-fibre membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.20 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 1500mg/L adds Powdered Activated Carbon 45kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Active sludge is then in replenishing Powdered Activated Carbon 1.5kg ratio every day of 1500mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.23kPa/d, MBR water outlet COD
CrBe 46mg/L, the RO membrance chemistry cleaning interval is 3 first quarter moons.
Embodiment 3
Adopt MBR+RO technology Treatment for Reuse paper waste, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.40 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 1000mg/L adds Powdered Activated Carbon 30kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Active sludge is then in replenishing Powdered Activated Carbon 1kg ratio every day of 1000mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.18kPa/d, MBR water outlet COD
CrBe 31mg/L, the RO membrance chemistry cleaning interval is 4 months.
Embodiment 4
Adopt MBR+RO technology Treatment for Reuse glass fiber waste water, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.50 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 1200mg/L adds Powdered Activated Carbon 36kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Active sludge is then in replenishing Powdered Activated Carbon 1.2kg ratio every day of 1200mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.31kPa/d, MBR water outlet COD
CrBe 48mg/L, the RO membrance chemistry cleaning interval is 2 first quarter moons.
Embodiment 5
Adopt MBR+RO technology Treatment for Reuse sanitary sewage, wherein the separatory membrane in the MBR system is a hollow-fibre membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.08 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 300mg/L adds Powdered Activated Carbon 9kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Residual active sludge is then in replenishing Powdered Activated Carbon 0.3kg ratio every day of 300mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.14kPa/d, MBR water outlet COD
CrBe 19mg/L, the RO membrance chemistry cleaning interval is 5 months.
Embodiment 6
Adopt MBR+RO technology Treatment for Reuse dyeing waste water, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.20 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.Powdered Activated Carbon directly is added in the biological reaction tank, and the volume of active sludge is 30m in the biological reaction tank
3, be that 1500mg/L adds Powdered Activated Carbon 45kg by dosage; When biological reaction tank discharging active sludge, discharge 1m every day
3Active sludge is then in replenishing Powdered Activated Carbon 1.5kg ratio every day of 1500mg/L.After Powdered Activated Carbon added, MBR film pollution speed was 0.21kPa/d, MBR water outlet COD
CrBe 44mg/L, the RO membrance chemistry cleaning interval is 3 first quarter moons.
Comparative Examples 1
Adopt MBR+RO technology Treatment for Reuse sanitary sewage, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.08 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.In the operational process of film integrated system, MBR film pollution speed is 0.34kPa/d, MBR water outlet COD
CrBe 49mg/L, the RO membrance chemistry cleaning interval is 2 months.
Comparative Examples 2
Adopt MBR+RO technology Treatment for Reuse dyeing waste water, wherein the separatory membrane in the MBR system is a hollow-fibre membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.20 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.In the operational process of film integrated system, MBR film pollution speed is 0.68kPa/d, MBR water outlet COD
CrBe 92mg/L, the RO membrance chemistry cleaning interval is 1 month.
Comparative Examples 3
Adopt MBR+RO technology Treatment for Reuse paper waste, wherein the separatory membrane in the MBR system is a flat sheet membrane, and membrane material is a polyvinylidene difluoride (PVDF), and membrane pore size is 0.40 μ m; The RO system adopts antipollution RO film, and the film surface charge is electric neutrality.In the operational process of film integrated system, MBR film pollution speed is 0.52kPa/d, MBR water outlet COD
CrBe 68mg/L, the RO membrance chemistry cleaning interval is 1 first quarter moon.
Claims (7)
1. waste water treatment process, after it is characterized in that the biological reaction tank of waste water through containing active sludge carries out biochemical treatment, by separatory membrane this active sludge is carried out solid-liquid separation and obtains treating water 1 time, this 1 treating water enters reverse osmosis membrane again carry out advanced treatment after, obtain treating water 2 times; Wherein in described biological reaction tank, add Powdered Activated Carbon during biochemical treatment.
2. waste water treatment process according to claim 1 is characterized in that the volume according to described active sludge, and the dosage of Powdered Activated Carbon is 300mg/L～1500mg/L.
3. waste water treatment process according to claim 1 and 2 is characterized in that described biological reaction tank during active sludge, according to the volume of the active sludge that is discharged, adds Powdered Activated Carbon in discharging in biological reaction tank.
4. waste water treatment process according to claim 3 is characterized in that the described amount of adding Powdered Activated Carbon, according to the volume of the excess sludge that is discharged, is 300mg/L～1500mg/L.
5. waste water treatment process according to claim 1, the form that it is characterized in that described separatory membrane is hollow-fibre membrane or flat sheet membrane.
6. waste water treatment process according to claim 1 or 5, the material that it is characterized in that described separatory membrane is a polyvinylidene difluoride (PVDF), the mean value of the fine pore that the surface distributed of separatory membrane is 0.04～0.40 μ m.
7. waste water treatment process according to claim 1 is characterized in that described reverse osmosis membrane is the resistance to crocking reverse osmosis membrane, and the surface charge of reverse osmosis membrane is electric neutrality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100273277A CN101898845A (en) | 2009-05-27 | 2009-05-27 | Wastewater treatment process |
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| CN2009100273277A CN101898845A (en) | 2009-05-27 | 2009-05-27 | Wastewater treatment process |
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| CN101898845A true CN101898845A (en) | 2010-12-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557284A (en) * | 2010-12-27 | 2012-07-11 | 杨志中 | Waste water recycling method and system thereof |
| CN103253832A (en) * | 2013-05-31 | 2013-08-21 | 神华集团有限责任公司 | Reusing treatment method of coking wastewater |
| CN108275772A (en) * | 2018-03-29 | 2018-07-13 | 华中农业大学 | A kind of method that activated carbon update slows down membrane bioreactor pollution |
| CN108373247A (en) * | 2018-05-14 | 2018-08-07 | 北京赛科康仑环保科技有限公司 | One kind being used for coking wastewater deep treatment reuse technology |
| CN109956553A (en) * | 2017-12-22 | 2019-07-02 | 株式会社久保田 | A kind of wastewater treatment method and device that selective absorption is combined with biological treatment |
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| CN1772649A (en) * | 2005-09-28 | 2006-05-17 | 上海电力学院 | Combined membrane bioreactor-reverse osmosis unit for treating non-degradable industrial effluent |
| CN101209886A (en) * | 2006-12-26 | 2008-07-02 | 蓝星环境工程有限公司 | Advanced treatment recycling technique of urban sewage |
| CN101219846A (en) * | 2008-01-23 | 2008-07-16 | 哈尔滨工业大学 | Ultrafiltration membrane coagulation /adsorption/bioreactor integrating advanced water treatment method and device |
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2009
- 2009-05-27 CN CN2009100273277A patent/CN101898845A/en active Pending
Patent Citations (3)
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| CN1772649A (en) * | 2005-09-28 | 2006-05-17 | 上海电力学院 | Combined membrane bioreactor-reverse osmosis unit for treating non-degradable industrial effluent |
| CN101209886A (en) * | 2006-12-26 | 2008-07-02 | 蓝星环境工程有限公司 | Advanced treatment recycling technique of urban sewage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557284A (en) * | 2010-12-27 | 2012-07-11 | 杨志中 | Waste water recycling method and system thereof |
| CN103253832A (en) * | 2013-05-31 | 2013-08-21 | 神华集团有限责任公司 | Reusing treatment method of coking wastewater |
| CN109956553A (en) * | 2017-12-22 | 2019-07-02 | 株式会社久保田 | A kind of wastewater treatment method and device that selective absorption is combined with biological treatment |
| CN108275772A (en) * | 2018-03-29 | 2018-07-13 | 华中农业大学 | A kind of method that activated carbon update slows down membrane bioreactor pollution |
| CN108373247A (en) * | 2018-05-14 | 2018-08-07 | 北京赛科康仑环保科技有限公司 | One kind being used for coking wastewater deep treatment reuse technology |
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Application publication date: 20101201 |
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