CN105923754A - Method for cleaning MBR in real time in wastewater treatment process - Google Patents

Method for cleaning MBR in real time in wastewater treatment process Download PDF

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Publication number
CN105923754A
CN105923754A CN201610409520.7A CN201610409520A CN105923754A CN 105923754 A CN105923754 A CN 105923754A CN 201610409520 A CN201610409520 A CN 201610409520A CN 105923754 A CN105923754 A CN 105923754A
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Prior art keywords
mbr
ozone
aerobic pond
pond
membrane
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CN201610409520.7A
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CN105923754B (en
Inventor
庄晓杰
刘敏
周游
方骏
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Hunan spaceflight kaytian water Co., Ltd.
Aerospace Kaitian Environmental Technology Co Ltd
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Kaitian Environmental Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/18—Use of gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The invention discloses a method for cleaning an MBR in real time in the wastewater treatment process. The method comprises the following steps: in an aerobiotic tank filled with the MBR, intermittently aerating with ozone and air, and aerating continuously, wherein the aeration amount of air is 1-4L/(m<2>.minute); the ozone aeration amount is 0.05-0.4L/(m2*minute); the ozone aeration time is 5-30 seconds; the ozone aeration period is 2-10 minutes. By adopting the method, membrane pollution is effectively inhibited, long-term operation of an MBR process can be achieved, and the MBR water yield is greatly increased. The method is simple and efficient in process, high in effluent quality and low in cost, and popularization and application can be achieved.

Description

A kind of method cleaning MBR in wastewater treatment process in real time
Technical field
The present invention relates to a kind of method of on-line cleaning MBR in wastewater treatment process, belong to field of waste water treatment.
Background technology
Along with economic fast development and the continuous consumption of water resource, shortage of water resources has become as global problem.To sewage It is circulated, regenerates and reuse, the problem that shortage of water resources can be efficiently solved.
Membrane bioreactor (MBR) is new type water treatment technology membrane separation technique combined with biologic treating technique, has The advantages such as effluent quality is high, stable, convenient management, sludge yield are few, have pole in waste water recycling and resource field For wide application prospect.But, in running, membrane module is susceptible to pollute, and result in membrane module flux and reduces； And membrane module cleaning process is sufficiently complex, cause membrane module utilization rate on the low side so that MBR operating cost greatly raises, This limits MBR application in water process and Treated sewage reusing the most to a certain extent.Thus, develop antipollution efficiently MBR is extremely necessary.
At present, MBR mainly uses PVDF hollow fiber film assembly, wherein PVDF many through hydrophilic modifying to improve it Resistance tocrocking.Along with organic matter is gradually adsorbed on the operation of MBR technique, pvdf membrane hole and film surface, cause PVDF's Hydrophily reduces, and fouling membrane phenomenon increases, and causes membrane flux to gradually decrease.At present, use air aeration more, wash, change Learn the modes such as the reagent cleaning degree rinsing membrane module according to fouling membrane so that it is recover membrane flux.But, in air aeration, Aeration produces water 8 minutes, and empty exposure does not produce water 2 minutes, causes the actual product water running time the most on the low side；Washing generally uses double Membrane module is cleaned by product water speed again, causes the minimizing of actual aquifer yield, and membrane module needs to take out in membrane cisterna to clean, Thus the time of operation is long；Chemical reagent cleans and generally uses the solution such as sodium hypochlorite to clean membrane module, needs film group Part takes out in membrane cisterna, and technological operation is sufficiently complex, and scavenging period is long, and the actual water that produces reduces.Above cleaning way is not Recover the hydrophily of PVDF, cause the cleaning frequency shorter and shorter, had a strong impact on the application of MBR technique.Thus, open It is highly important for sending out the cleaning run steadily in the long term of MBR.
Although having the technique using ozone to process MBR at present, but sewage all being pre-processed simply by ozone by it, subtracts The COD etc. of few sewage, or MBR is taken out, interrupt waste water treatment process, use other technique that it is carried out clearly Wash, how to make MBR be reused in actual wastewater treatment process, this be those skilled in the art for a long time Want the target realized.
Summary of the invention
It is an object of the invention to provide a kind of MBR of making and run cleaning in real time in wastewater treatment process of water outlet steadily in the long term The method of MBR.
Technical scheme:
A kind of method cleaning in real time MBR in wastewater treatment process, equipped with in the Aerobic Pond of MBR, expose into ozone with Air, air aeration amount is 1-4L/ (m2Min), air continues aeration；Ozonation aerated amount is 0.05-0.4L/ (m2Min), smelly Oxygen intermittent aerating, the ozonation aerated time 5～30s, the ozonation aerated cycle 2～10min.
The present invention farther includes following preferred technical scheme:
Preferably in scheme, ozone is passed through mouth and is arranged in around MBR.
Ozone is concentrated mainly on around membrane module and is batch (-type), not only the most not affects the microorganism in Aerobic Pond, also Efficient cleaning performance can be obtained simultaneously.
Preferably in scheme, using PLC to control interval ozonation aerated, obtain ozone by ozone generator, described ozone is sent out The ozone output of raw device is 1～5kg/h.
Preferably in scheme, described MBR is immersion PVDF hollow fiber film assembly.
Preferably in scheme, the membrane aperture of described MBR is 0.03～0.45 μm.
Preferably in scheme, the membrane flux of described MBR is 15～40L/ (m2·h)。
Preferably in scheme, the oxyty in described Aerobic Pond is more than 2mg/L.
Preferably in scheme, the influent quality COD of described Aerobic Pond is 200-500mg/L.
Preferably in scheme, the ammonia-nitrogen content of described Aerobic Pond is 30-60mg/L, and total phosphorus content is 3-10mg/L.
Preferably in scheme, described waste water uses continuum micromeehanics to sequentially pass through anoxic pond, Aerobic Pond.
Preferably in scheme, the oxyty of described anoxic pond is 0.2～0.5mg/L.
By above preferably scheme, it is possible to ensure the acquisition of beneficial effect of the present invention further.
Hinge structure, the Advantageous Effects that technical scheme is brought:
The use of MBR, effectively can process waste water, but in prior art, the pollution of membrane bioreactor is significantly Reducing its actual processing effect, existing conventional treatment is to be drawn off, and is carried out it, then adds wastewater disposal basin In reuse, but such processing procedure is the most numerous and diverse, also can largely effect on the treatment effect of waste water.
For above-mentioned present situation, inventor, by substantial amounts of research, has done substantial amounts of experiment, has the most just obtained the side of the present invention Case, the scheme of the application of the invention, it is thus achieved that the unexpected effect cleaning MBR in wastewater treatment process in real time.
In concrete processing procedure, inventor is by using ozone and air intermittent aerating in Aerobic Pond, and passes through to control The aeration rate of air, ozonation aerated amount, ozonation aerated time, ozonation aerated cycle, not only achieve good waste water and process Effect, it is most important that simultaneously can effectively clean MBR, improves waste water treatment efficiency further.This is to ability There is very important realistic meaning, it is possible to bring huge economic benefit for territory.
The present invention greatly controls the fouling membrane of MBR, and can recover even to improve its hydrophily, effectively enhances it Resistance tocrocking.And, MBR can be with longtime running water outlet, it is not necessary to interrupt cleaning.Ozone is concentrated mainly on around membrane module And be batch (-type), the microorganism in Aerobic Pond is not the most affected.
The present invention can on-line cleaning MBR effectively, solve MBR membrane pollution problem, it is achieved that MBR technique long-term Running, MBR water yield is greatly increased.And, the stable operation water outlet always of this process MBR.The method is simple, efficient, Effluent quality is high, low cost, it is possible to achieve popularization and application.
Accompanying drawing explanation
Fig. 1 is the comparison of embodiment 1 and the MBR transmembrane pressure of comparative example 1-3.
Detailed description of the invention
Embodiment 1
With municipal administration sanitary wastewater for water inlet, influent quality COD about 250mg/L, ammonia nitrogen about 20mg/L, total phosphorus about 4mg/L. Whole technique mainly includes anoxic pond, Aerobic Pond, membrane module, ozone generator and aerator etc..Waste water sequentially passes through scarce Oxygen pond and Aerobic Pond, use suction to be discharged in membrane module by water in Aerobic Pond.Dissolved oxygen in anoxic pond maintains 0.3 Mg/L, it is 0.05 μm that the dissolved oxygen of Aerobic Pond maintains the aperture of 3mg/L, MBR, and membrane flux is maintained 20L/ (m2H), Air aeration amount 2L/ (m2Min), ozonation aerated amount 0.1L/ (m2Min), ozone output is 2kg/h, and the ozonation aerated time is 10s, aeration period is 5min.The transmembrane pressure (TMP) of MBR and the relation of time are as it is shown in figure 1, find to use interval Ozone and the common aeration of air, the TMP of MBR slowly rises, and changes inconspicuous, can effectively suppress fouling membrane phenomenon.
Comparative example 1
With municipal administration sanitary wastewater for water inlet, influent quality COD about 250mg/L, ammonia nitrogen about 20mg/L, total phosphorus about 4mg/L. Whole technique mainly includes anoxic pond, Aerobic Pond, membrane module and aerator etc..Waste water sequentially passes through anoxic pond and Aerobic Pond, Suction is used to be discharged in membrane module by water in Aerobic Pond.Dissolved oxygen in anoxic pond maintains 0.3mg/L, Aerobic Pond molten It is 0.05 μm that oxygen maintains the aperture of 3mg/L, MBR, and membrane flux is maintained 20L/ (m2H), air aeration amount 2L/(m2·min).The transmembrane pressure (TMP) of MBR and the relation of time are as it is shown in figure 1, operation MBR over time TMP significantly increases.
Comparative example 2
With municipal administration sanitary wastewater for water inlet, influent quality COD about 250mg/L, ammonia nitrogen about 20mg/L, total phosphorus about 4mg/L. Whole technique mainly includes anoxic pond, Aerobic Pond, membrane module and aerator etc..Whole technique mainly includes anoxic pond, good Oxygen pond, membrane module, ozone generator and aerator etc..Waste water sequentially passes through anoxic pond and Aerobic Pond, adopts in Aerobic Pond With suction, water is discharged in membrane module.Dissolved oxygen in anoxic pond maintains 0.3mg/L, and the dissolved oxygen in Aerobic Pond maintains 3 The aperture of mg/L, MBR is 0.05 μm, and membrane flux is maintained 20L/ (m2H), air aeration amount 2L/ (m2Min), ozone Aeration rate 0.01L/ (m2Min), ozone output is 2kg/h, and the ozonation aerated time is 10s, and aeration period is 5min.By Fig. 1 finds, operation over time, the TMP of MBR has increased, it is impossible to substantially plays and substantially suppresses fouling membrane.
Comparative example 3
With municipal administration sanitary wastewater for water inlet, influent quality COD about 250mg/L, ammonia nitrogen about 20mg/L, total phosphorus about 4mg/L. Whole technique mainly includes anoxic pond, Aerobic Pond, membrane module and aerator etc..Whole technique mainly includes anoxic pond, good Oxygen pond, membrane module, ozone generator and aerator etc..Waste water sequentially passes through anoxic pond and Aerobic Pond, adopts in Aerobic Pond With suction, water is discharged in membrane module.Dissolved oxygen in anoxic pond maintains 0.3mg/L, and the dissolved oxygen in Aerobic Pond maintains 3 The aperture of mg/L, MBR is 0.05 μm, and membrane flux is maintained 20L/ (m2H), air aeration amount 2L/ (m2Min), ozone Aeration rate 1L/ (m2Min), ozone output is 2kg/h, and the ozonation aerated time is 10s, and aeration period is 5min.Result is good Aerobic microbiological mortality in oxygen pond.

Claims (10)

1. the method cleaning in real time MBR in wastewater treatment process, it is characterised in that equipped with in the Aerobic Pond of MBR, Exposing into ozone and air, air aeration amount is 1-4L/ (m2Min), air continues aeration；Ozonation aerated amount is 0.05-0.4L/(m2Min), ozone intermittent aerating, the ozonation aerated time 5～30s, the ozonation aerated cycle 2～10min.
Method the most according to claim 1, it is characterised in that ozone is passed through mouth and is arranged in around MBR.
Method the most according to claim 1, it is characterised in that use PLC to control interval ozonation aerated, sent out by ozone Raw device obtains ozone, and the ozone output of described ozone generator is 1～5kg/h.
Method the most according to claim 1, it is characterised in that described MBR is immersion PVDF hollow-fibre membrane group Part.
5. according to the method described in claim 1 or 4, it is characterised in that the membrane aperture of described MBR is 0.03～0.45 μm.
Method the most according to claim 5, it is characterised in that the membrane flux of described MBR is 15～40L/ (m2·h)。
Method the most according to claim 1, it is characterised in that the oxyty in described Aerobic Pond is more than 2mg/L.
8. according to the method described in claim 1 or 7, it is characterised in that the influent quality COD of described Aerobic Pond is 200-500 mg/L。
9. according to the method described in claim 1 or 7, it is characterised in that the ammonia-nitrogen content of described Aerobic Pond is 30-60mg/L, Total phosphorus content is 3-10mg/L.
Method the most according to claim 1, it is characterised in that described waste water use continuum micromeehanics sequentially pass through anoxic pond, Aerobic Pond；The oxyty of described anoxic pond is 0.2～0.5mg/L.
CN201610409520.7A 2016-06-13 2016-06-13 A method of cleaning MBR in real time in wastewater treatment process Active CN105923754B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106430835A (en) * 2016-11-07 2017-02-22 天津傲人环保科技有限公司 Embedded ozone membrane bioreactor (MBR) device and embedded ozone MBR treatment method
CN108503019A (en) * 2018-03-20 2018-09-07 清华大学深圳研究生院 A kind of membrane bioreactor and sewage water treatment method
CN108889137A (en) * 2018-09-06 2018-11-27 杭州近源环保科技有限公司 A kind of online catalysis oxidation cleaning method of MBR
CN111252932A (en) * 2018-11-30 2020-06-09 广州中国科学院先进技术研究所 Membrane absorption deamination method and system based on direct contact type micropore aeration reinforcement

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106430835A (en) * 2016-11-07 2017-02-22 天津傲人环保科技有限公司 Embedded ozone membrane bioreactor (MBR) device and embedded ozone MBR treatment method
CN108503019A (en) * 2018-03-20 2018-09-07 清华大学深圳研究生院 A kind of membrane bioreactor and sewage water treatment method
CN108503019B (en) * 2018-03-20 2024-05-07 清华大学深圳研究生院 Membrane bioreactor and sewage treatment method
CN108889137A (en) * 2018-09-06 2018-11-27 杭州近源环保科技有限公司 A kind of online catalysis oxidation cleaning method of MBR
CN111252932A (en) * 2018-11-30 2020-06-09 广州中国科学院先进技术研究所 Membrane absorption deamination method and system based on direct contact type micropore aeration reinforcement
CN111252932B (en) * 2018-11-30 2022-07-05 广州中国科学院先进技术研究所 Membrane absorption deamination method and system based on direct contact type micropore aeration reinforcement

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