CN113926313A - MBR membrane cleaning method for sewage treatment - Google Patents
MBR membrane cleaning method for sewage treatment Download PDFInfo
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- CN113926313A CN113926313A CN202111308799.7A CN202111308799A CN113926313A CN 113926313 A CN113926313 A CN 113926313A CN 202111308799 A CN202111308799 A CN 202111308799A CN 113926313 A CN113926313 A CN 113926313A
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- 239000012528 membrane Substances 0.000 title claims abstract description 205
- 238000004140 cleaning Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 239000003814 drug Substances 0.000 claims abstract description 106
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 238000005406 washing Methods 0.000 claims abstract description 83
- 238000002791 soaking Methods 0.000 claims abstract description 52
- 229940079593 drug Drugs 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000011001 backwashing Methods 0.000 claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 239000006210 lotion Substances 0.000 claims description 46
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 18
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 11
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 11
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 9
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 9
- 239000012425 OXONE® Substances 0.000 claims description 8
- OKBMCNHOEMXPTM-UHFFFAOYSA-M potassium peroxymonosulfate Chemical compound [K+].OOS([O-])(=O)=O OKBMCNHOEMXPTM-UHFFFAOYSA-M 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 238000005273 aeration Methods 0.000 description 18
- 238000002360 preparation method Methods 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 10
- 230000004907 flux Effects 0.000 description 9
- 238000004659 sterilization and disinfection Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000004061 bleaching Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000011012 sanitization Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 3
- 238000005202 decontamination Methods 0.000 description 3
- 230000003588 decontaminative effect Effects 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 241000233866 Fungi Species 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 238000005842 biochemical reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- -1 potassium hydrogen peroxymonosulfate compound salt Chemical class 0.000 description 2
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical group [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- HJKYXKSLRZKNSI-UHFFFAOYSA-I pentapotassium;hydrogen sulfate;oxido sulfate;sulfuric acid Chemical compound [K+].[K+].[K+].[K+].[K+].OS([O-])(=O)=O.[O-]S([O-])(=O)=O.OS(=O)(=O)O[O-].OS(=O)(=O)O[O-] HJKYXKSLRZKNSI-UHFFFAOYSA-I 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- 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
- B01D2321/16—Use of chemical agents
-
- 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
-
- 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
Landscapes
- 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)
Abstract
The application relates to the technical field of sewage treatment, in particular to an MBR (membrane bioreactor) membrane cleaning method for sewage treatment, which comprises daily cleaning operation and maintenance cleaning operation; the daily cleaning operation comprises backwashing treatment and drug washing treatment, and the backwashing treatment is carried out when the negative pressure value of the MBR membrane is-0.035 to-0.045 MPa; when the negative pressure value of the MBR membrane is-0.046 to-0.060 MPa, carrying out drug washing treatment, wherein the drug washing treatment adopts a drug washing liquid A to wash the MBR membrane, the drug washing liquid A is prepared by mixing an agent A and water, and the judgment is carried out through the negative pressure value of the MBR membrane and the back washing treatment or the drug washing treatment is adopted, so that the long-term soaking of the MBR membrane in the drug washing agent is reduced, the MBR membrane is maintained through maintenance and washing operation, and the service life of the MBR membrane is prolonged.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to an MBR (membrane bioreactor) membrane cleaning method for sewage treatment.
Background
MBR is also called membrane bioreactor, is used for sewage treatment, filters water containing sludge in a sewage treatment biochemical reaction tank, and has high-efficiency sludge-water separation effect. MBR has various membrane types, and is classified according to a separation mechanism, such as a reaction membrane, an ion exchange membrane, a permeable membrane and the like; in the MBR treatment process, on one hand, microorganisms in the reaction tank are intercepted, so that the concentration of activated sludge in the tank is greatly increased, and the biochemical reaction for degrading sewage is carried out more quickly and thoroughly; on the other hand, the MBR has the effect of high filtering precision, so that the filtered water is clear and transparent, the quality of the filtered water is further improved, and in addition, the MBR also has the advantages of rapid and high-efficiency removal of organic matters and nutrient substances, complete removal of solid matters, excellent disinfection property and less floor area, so that the MBR is widely applied to the process of domestic sewage treatment or industrial wastewater treatment.
The MBR membrane comprises a mould body and a water production pipe, wherein the mould body is composed of a plurality of fine tubular pipes, and each fine pipe is communicated with the water production pipe.
When the MBR membrane is used for filtering domestic sewage, the MBR membrane is usually cleaned by adopting a medicament with stronger oxidizability, the effect of efficiently cleaning the MBR membrane can be achieved, but the MBR membrane is corroded by using the medicament with strong oxidizability or strong acid-base property for a long time, so that the damage to the MBR membrane can be caused, and the service life of the MBR membrane is shortened.
Disclosure of Invention
In order to prolong the service life of the MBR membrane, the application provides an MBR membrane cleaning method for sewage treatment.
The application provides an MBR membrane cleaning method for sewage treatment adopts following technical scheme:
an MBR membrane cleaning method for sewage treatment comprises daily cleaning operation and maintenance cleaning operation; the daily cleaning operation comprises backwashing treatment and drug washing treatment, and the backwashing treatment is carried out when the negative pressure value of the MBR membrane is-0.035 to-0.045 MPa; and when the negative pressure value of the MBR membrane is-0.046 to-0.060 MPa, carrying out the drug washing treatment, wherein the drug washing treatment adopts a drug washing liquid A to clean the MBR membrane, and the drug washing liquid A is prepared by mixing an agent A and water.
According to the technical scheme, the blocking condition of the MBR membrane is reflected according to the negative pressure value range of the MBR membrane, and the required cleaning treatment mode is selected; MBR membrane filtration is a pressure-driven membrane separation process, a vacuum pump is utilized to generate negative pressure in an MBR membrane, so that water enters the membrane to form clear liquid, and colloid, sludge, various parasites and various bacteria and viruses are trapped outside the membrane, thereby achieving the effects of mud-water separation and filtration; wherein, negative pressure table and vacuum pump connection to install beside the pond, the accessible is observed the negative pressure value of negative pressure table, and then obtains the inside negative pressure value of MBR membrane.
When the negative pressure value of the MBR membrane is lower, the MBR membrane is more seriously polluted and blocked, generally when the MBR membrane normally works, the negative pressure value of the MBR membrane is-0.020 to-0.030 MPa, when the negative pressure value of the MBR membrane is increased to-0.035 to-0.045 MPa, the MBR membrane is polluted and blocked, but the pollution and blockage is not serious, at the moment, back flushing treatment can be adopted, the MBR membrane is reversely flushed from the inside to the outside of the membrane, and the pollution and blockage attached to the outside of the membrane is flushed cleanly. The A agent has oxidability, and can disinfect and clean organic substances such as algae and fungi; therefore, when the negative pressure value of the MBR membrane is-0.046 to-0.060 MPa, which indicates that the fouling is serious, the MBR membrane can be cleaned by adopting the medicinal washing liquid A to carry out medicinal washing treatment on the MBR membrane. This application uses back flush treatment or medicine to wash the processing, carries out daily washing operation, and the rethread is maintained the washing operation and is washd, reduces daily use strong oxidizer abluent number of times, simultaneously, maintains the MBR membrane, prolongs the life of MBR membrane.
Preferably, when the negative pressure value of the MBR membrane is-0.046 to-0.055 MPa, performing mild drug washing treatment; the mild drug washing treatment specifically adopts a drug washing liquid A to wash the MBR membrane, wherein the drug washing liquid A is prepared by mixing a drug A and water in a weight ratio of 0.95-1.05: 200 are mixed.
Through above-mentioned technical scheme, this A medicament is the preferred cleaning range with the proportional range of water, under medicine lotion A's cleaning action, can be fast with MBR membrane sanitization, guarantee that MBR membrane can stable filtration, and reduce long-term accumulational dirt and block up and cause serious harm to MBR membrane, and then prolong MBR membrane's life.
Preferably, the steps of the mild medicinal washing treatment are as follows: soaking the MBR membrane in the medicinal washing liquid A, and performing an aeration process: soaking for 25-35min, aerating for 18-22min, soaking for 28-32min, and aerating for 13-17min, which is a medicine soaking process; the medicine soaking process is repeated for 3-5 times.
This slight cleaning process has easy operation's advantage, and this slight cleaning process can increase progressively according to the number of repetitions of soaking the medicine process, and the time of its aeration can corresponding reduction, through aeration many times, improves the cleaning performance of MBR membrane, extension MBR membrane life.
Preferably, when the negative pressure value of the MBR membrane is-0.056 to-0.60 MPa, performing heavy drug washing treatment; the severe drug washing treatment specifically adopts a drug washing liquid A to wash the MBR membrane, and then adopts a drug washing liquid B to wash the MBR membrane, wherein the drug washing liquid A is prepared by mixing water and an agent A according to a weight ratio of 50: 0.95-1.05, wherein the medicinal lotion B is prepared by mixing citric acid and water in a weight ratio of 1-2: 100, mixing and forming.
Through above-mentioned technical scheme, should be the preferred scope with the proportion scope of the A medicament that corresponds and water, adopt medicine lotion A to wash the MBR membrane, the MBR membrane is further washed to rethread medicine lotion B, makes MBR membrane sanitization. The agent A has the effects of oxidation, complexation, adsorption and disinfection, can complex and adsorb metal ions on the MBR membrane, and can clean organic matters and the like adhered to the MBR membrane; and citric acid has the chelating effect, and can further precipitate metal ion rapidly, prevents that dirty stifled thing from adhering to on the MBR membrane again, makes dirty stifled thing dispersion, suspension, and the surface activity of high solution liquid medicine can be got rid of the greasy dirt of adhering to the MBR membrane simultaneously, improves MBR membrane cleaning performance, and then reduces the MBR membrane and maintains the number of times of wasing the operation, prolongs the life of MBR membrane.
Preferably, the steps of the heavy drug washing treatment are as follows:
step A: draining the pond water, and removing sludge attachments on the surface of the MBR membrane;
and B: adding the medicinal lotion A into the pool, adjusting pH of the medicinal lotion A to 10-11, aerating for 18-22min, submerging for 11-13h, and aerating for 8-12min after each submerging for 1 h;
and C: emptying the medicinal lotion A, adding the medicinal lotion B into the pool, adjusting pH of the medicinal lotion B to 2-3, aerating for 18-23min, submerging for 2-5h, and aerating for 8-12min after submerging for 1 h.
The severe drug washing treatment has the advantages of good washing effect and simple operation, the MBR membrane in the severe drug washing process is always placed in a tank, the severe washing process is different from the mild washing process in that the addition of the A medicament is increased, the effects of oxidation, complexation, adsorption and disinfection are further enhanced, the pH value is preferably adjusted by adopting sodium hydroxide, the pH value in the washing process is kept between 10 and 11, the cleaning and adsorption effects of organic matters and metal ions on the MBR membrane are enhanced, if the pH value is less than 10, the cleaning effect on the MBR membrane is not good, and if the pH value of the MBR membrane is more than 11, the MBR membrane is damaged due to over-strong alkalinity; adopt medicine lotion A to sneak to steep and wash back and add medicine lotion B, advance one by one and wash the MBR membrane, with some metal oxide, dirt etc. of adhesion on the MBR membrane wash, improve the cleaning performance of MBR membrane, and then reduce MBR membrane and maintain the number of times, prolong the life of MBR membrane.
Preferably, the maintenance cleaning operation comprises a manual cleaning treatment and an immersion type soaking treatment; when 3-5 times of heavy drug washing treatment occurs in one week, and the negative pressure value of the MBR membrane is-0.056 to-0.60 MPa again, carrying out manual cleaning treatment; and (5) soaking type cleaning treatment is carried out after the MBR membrane is used for 5-7 months.
Through above-mentioned technical scheme, to the dirty stifled degree of difference, appear dirty stifled time length of blocking up under the stifled condition of dirt, carry out different forms and maintain, be convenient for maintain and maintain the MBR membrane, prolong the life of MBR membrane.
Preferably, the manual cleaning process includes the following steps:
s1: turning off the detection equipment, pressing sludge of the MBR membrane into the aerobic tank, and controlling the sludge pressing amount according to the sludge amount;
s2: washing sludge on the surface of the MBR membrane;
s3: adding the medicinal lotion A into the pond, adjusting the pH value of the medicinal lotion A to 10-11, submerging the MBR membrane for 2-4h, submerging for 40min every time, and aerating for 8-12 min;
s4: emptying the medicine washing liquid A, washing the MBR membrane threads by rubbing, and cleaning the MBR membrane threads;
s5: adding a medicinal lotion A into the pool, adjusting the pH value of the medicinal lotion A to 10-11, soaking the MBR membrane for 1-2h, soaking for 20min every time, aerating for 8-12min, draining the medicinal liquid after cleaning, and adding water;
the medicinal lotion A in the S3 and the medicinal lotion A in the S5 are respectively prepared from water and an agent A in a weight ratio of 50: 0.95-1.05.
The process has the advantages of good cleaning effect and simple operation, can reduce the attachment of the dirty and blocked objects to a greater extent through scrubbing, and simultaneously cleans the MBR membrane through twice administration of the washing liquid A, so that the dirty and blocked objects of the MBR membrane are cleaned, and the cleaning effect of the MBR membrane is improved; in the manual cleaning operation, when the medicinal lotion A can not completely remove the dirt, 1-2 parts by weight of citric acid with the mass fraction of 1% and water are further adopted: 100 medicine lotion B of allotment further washs, adjusts pH value to 2-3, aerates 20 minutes after, then dives bubble 2-3h, and every h aerates 10 minutes, and then makes the MBR membrane accomplish the sanitization, and this process operation is simple, and can further wash the MBR membrane to pure white, improves the cleaning performance of MBR membrane, is convenient for maintain and maintain the MBR membrane, prolongs the life of MBR membrane.
Preferably, the soaking type membrane washing treatment is to wash the MBR membrane by adopting a medicine washing liquid A, wherein the medicine washing liquid A is prepared by mixing an agent A and water in a weight ratio of 25: 0.95-1.05.
Through the technical scheme, the steps of the soaking type membrane washing treatment are the same as the steps of the manual membrane washing treatment, except that the ratio of the medicament A to the water in parts by weight adopted in the soaking type membrane washing treatment is different, and when the medicinal washing liquid A cannot completely remove the dirt blockage, the medicinal washing liquid A can adopt citric acid and water in the weight ratio of 1-2: the MBR membrane is further washd to the medicine lotion composition branch after 50 mixes, improves the cleaning performance of MBR membrane, is convenient for maintain and maintain the MBR membrane, prolongs the life of MBR membrane. The lotion A can be prepared in a water pool in real time, and particularly, after water is added into the water pool, the agent A is added for preparation; alternatively, it may be dispensed in an additional container and pumped into the basin using a material pump or the like when cleaning is desired. Similarly, lotion B can be dispensed in real time from the reservoir or dispensed in an additional container and pumped into the reservoir.
Preferably, the medicament A comprises the following raw materials in parts by weight:
sodium hypochlorite: 5-20 parts of
Potassium peroxymonosulfate complex salt: 0.5 to 1 portion
Sodium lauryl sulfate: 0.3 to 0.5 portion
Polyacrylamide: 0.1 to 1 portion
Deionized water: 50-200 parts.
Through the technical scheme, the sodium hypochlorite has the functions of bleaching, sterilization, purification and disinfection, the potassium hydrogen peroxymonosulfate compound salt and the sodium hypochlorite have the synergistic effect, the bleaching, sterilization, purification and disinfection functions can be further improved, the lauryl sodium sulfate is used as a surfactant, has decontamination and dispersion performances, can promote oxidation reaction, and the polyacrylamide has various active groups and can adsorb metal ions of sewage; through the compound use of sodium hypochlorite, potassium hydrogen peroxymonosulfate composite salt, lauryl sodium sulfate, polyacrylamide, the A medicament that makes obtained has better bleaching, disinfect, purification and disinfection, decontamination, dispersion and absorbent effect, and then improves the cleaning performance of MBR membrane, is convenient for wash, maintain and maintain the MBR membrane, prolongs the life of MBR membrane.
Preferably, the washing step of the backwashing treatment is specifically to reflux water passing through the water production pipe into the MBR membrane for backwashing, and the washing time is 28-32 min.
Through the back flush processing, make water through MBR membrane internal reflux, and then make the dirty stifled thing of adhesion in MBR membrane surface break away from, this process need not strong oxidant and washs, and can be with MBR membrane surface sanitization completely, reduces the loss of medicament composition to the MBR membrane, prolongs the life of MBR membrane.
In summary, the present application has the following beneficial effects:
1. the A agent has oxidability, and can disinfect and clean organic matters such as algae and fungi; the MBR membrane cleaning method has the advantages that the MBR membrane can be quickly cleaned by the medicinal cleaning solution A prepared by adding water into the agent A, the daily cleaning operation is carried out through the backwashing treatment and the medicinal cleaning treatment, and then the cleaning is carried out through the maintenance cleaning operation, so that the times of daily cleaning by using a strong oxidant are reduced, meanwhile, the MBR membrane is maintained, and the service life of the MBR membrane is prolonged;
2. by adopting the technical scheme, the fouling and blocking degree of the MBR membrane can be judged according to the negative pressure value of the MBR membrane, different forms of maintenance can be performed on different fouling and blocking degrees, the MBR membrane can be conveniently maintained, and the service life of the MBR membrane can be prolonged;
3. through the compound use of sodium hypochlorite, potassium hydrogen peroxymonosulfate composite salt, lauryl sodium sulfate, polyacrylamide, the A medicament that makes obtained has better bleaching, disinfect, purification and disinfection, decontamination, dispersion and absorbent effect, and then improves the cleaning performance to the MBR membrane, is convenient for wash, maintain and maintain the MBR membrane, prolongs the life of MBR membrane.
Detailed Description
The present application will be described in further detail with reference to examples.
Part of raw material sources adopted by the application are;
potassium peroxymonosulfate complex salt, manufacturer: kyoho chemical Co., Ltd;
polyacrylamide, manufacturer: the molecular weight of 600-.
Preparation example
Preparation example of A medicament
Preparation example 1
Preparation of an agent A: weighing 50Kg of sodium hypochlorite, 5Kg of potassium peroxymonosulfate composite salt, 3Kg of sodium dodecyl sulfate and 1Kg of polyacrylamide, adding into 500Kg of deionized water, and mixing uniformly to obtain the A medicament;
preparation example 2
Preparation of an agent A: 100Kg of sodium hypochlorite, 7.5Kg of potassium peroxymonosulfate composite salt, 4Kg of sodium dodecyl sulfate, 5Kg of polyacrylamide and 1000Kg of deionized water are mixed uniformly to obtain the A medicament;
preparation example 3
Preparation of an agent A: weighing 200Kg of sodium hypochlorite, 10Kg of potassium peroxymonosulfate composite salt, 5Kg of sodium dodecyl sulfate, 10Kg of polyacrylamide and 2000Kg of deionized water, uniformly mixing, and obtaining a medicament A;
examples
Example 1
An MBR membrane cleaning method for sewage treatment, when the negative pressure value of an MBR membrane is-0.035 to-0.045 MPa, performing reverse cleaning treatment: the domestic sewage in the MBR membrane tank is emptied, and then water is reversely led into the water production pipe to enable the water to reversely flow back, and the water enters the interior of the MBR membrane through the water production pipe and seeps out from the interior of the MBR membrane to the outside, so that the dirt blocking objects adhered to the outer surface layer of the MBR membrane fall off, the reverse cleaning is realized, and the reverse cleaning time is 30 min.
Example 2
In the process of drug washing treatment, when the negative pressure value of an MBR membrane is-0.046 to-0.055 MPa, the following steps are adopted for drug washing treatment:
step 1: emptying the original sewage in the water tank, injecting water into the water tank to enable the water to completely submerge the MBR membrane, and weighing the medicament A obtained in the preparation example 1 according to the addition of the water, wherein the ratio of the medicament A to the water in parts by weight is 0.95: 200 to obtain a medicinal lotion A;
step 2: closing a water inlet valve and a water outlet valve of the water tank, and soaking the MBR membrane in the medicinal washing liquid A; soaking for 25min, aerating for 18min, closing aeration, soaking for 28min, aerating for 13min, and soaking the medicines;
repeating the above soaking process, soaking for 25min, and aerating for 15 min; closing aeration, soaking for 28min, and aerating for 10 min; when repeating for the second time, submerging for 25min, and aerating for 12 min; and closing aeration, soaking for 28min, and aerating for 8 min.
Example 3
Example 3 differs from example 2 in that;
in the step 1, the medicament A obtained in the preparation example 2 is weighed according to the addition amount of water, and the ratio of the medicament A to the water in parts by weight is 1: 200 to obtain a medicinal lotion A;
in the step 2, soaking for 30min, aerating for 20min, closing aeration, soaking for 30min again, and aerating for 15min, which is a medicine soaking process;
repeating the above soaking process, soaking for 30min, and aerating for 17 min; closing aeration, soaking for 30min, and aerating for 12 min; when repeating for the second time, submerging for 30min, and aerating for 10 min; closing aeration, soaking for 30min, and aerating for 13 min; when repeating for the third time, submerging for 30min, and aerating for 10 min; and closing aeration, soaking for 30min, and aerating for 10 min.
Example 4
Example 4 differs from example 2 in that;
in the step 1, the medicament A obtained in the preparation example 3 is weighed according to the addition amount of water, and the ratio of the medicament A to the water in parts by weight is 1.05: 200 to obtain a medicinal lotion A;
in the step 2, soaking for 35min, aerating for 22min, closing aeration, soaking for 32min, and aerating for 17min, which is a medicine soaking process;
repeating the above soaking process, soaking for 35min, and aerating for 20 min; closing aeration, soaking for 32min, and aerating for 15 min; when repeating for the second time, submerging for 35min, and aerating for 18 min; closing aeration, soaking for 32min, and aerating for 13 min; when repeating for the third time, submerging for 35min, and aerating for 16 min; closing aeration, soaking for 32min, and aerating for 10 min; when repeating for the fourth time, submerging for 35min, and aerating for 10 min; and closing aeration, soaking for 32min, and aerating for 5 min.
Example 5
In the process of drug washing treatment, when the negative pressure value of an MBR membrane is-0.056 to-0.060 MPa, the following steps are adopted for drug washing treatment:
step A: draining the pond water, and removing sludge and other attachments on the surface of the MBR membrane;
and B: injecting water, and weighing the medicament A obtained in the preparation example 1 according to the adding amount of the water, wherein the weight ratio of the water to the medicament A is 50: 0.95, mixing to obtain a medicinal lotion A, adding sodium hydroxide to adjust the pH value of the medicinal lotion A to 10, aerating for 18min, submerging for 11h, aerating for 8min every submerging for 1h, and then monitoring the pH value of the water tank at any time in the whole process, and when the pH value of the water tank is less than 10, adding sodium hydroxide to control the pH value to be within the range of 10-11;
and C: draining the water in the pool of step B, injecting water, and adding citric acid, wherein the ratio of citric acid to water is 1: 100, mixing to obtain a medicinal lotion B, adjusting the pH value to 2, turning on aeration for 18min, turning off aeration, and carrying out submerged soaking for 2h, wherein aeration is carried out for 8min every 1 h.
Example 6
Example 6 differs from example 5 in that;
in the step B, the medicament A obtained in the preparation example 2 is weighed according to the addition amount of water, and the weight ratio of the water to the medicament A is 50: 1; adjusting the pH value of the medicinal lotion A to 11, aerating for 20min, submerging for 12h, 1h for each submerging, and aerating for 10 min;
in the step C, the weight ratio of citric acid to water is 2: 100, adjusting the pH value to 3, aerating for 20min, submerging for 3h, and aerating for 10min every 1 h.
Example 7
Example 7 differs from example 5;
in the step B, the medicament A obtained in the preparation example 3 is weighed according to the addition amount of water, and the weight ratio of the water to the medicament A is 50: 1.05; adjusting the pH value of the medicinal lotion A to 10, aerating for 22min, submerging for 13h, 1h for each submerging, and aerating for 12 min;
in the step C, the weight ratio of citric acid to water is 2: 100, adjusting the pH value to 2, aerating for 23min, submerging for 5h, and aerating for 12min every 1 h.
Example 8
A MBR membrane cleaning method for sewage treatment, when 3 times of heavy drug washing treatment occur in a week, wherein the negative pressure value appearing for the first time is-0.057, the negative pressure value appearing for the second time is-0.056, and the negative pressure value appearing for the third time is-0.059; when the fourth negative pressure value is-0.056, adopting manual cleaning treatment, comprising the following steps:
s1: turning off the detection equipment, pressing sludge of the MBR membrane into the aerobic tank, and controlling the sludge pressing amount according to the sludge amount;
s2: emptying the aquatic product, and flushing sludge on the surface of the MBR membrane;
s3: injecting water, weighing the medicament A obtained in the preparation example 3 according to the adding amount of the water, adding the medicament A, wherein the weight ratio of the water to the medicament A is 50: 1, mixing to obtain a medicinal lotion A, then adding sodium hydroxide, adjusting the pH value of the medicinal lotion A to 11, carrying out submerged soaking for 3h, and aerating for 10min every 40 min;
s4: emptying the water tank, washing the MBR membrane threads by rubbing, and cleaning the MBR membrane threads;
s5: injecting water, and adding the medicament A again, wherein the weight ratio of the water to the medicament A is 50: 1, mixing to obtain a medicinal lotion A, adding sodium hydroxide, adjusting the pH value of the medicinal lotion A to 11, soaking for 1h, aerating for 10min every 20min, removing the medicinal water, and adding the water.
Example 9
Example 9 differs from example 8 in that: after the steps of S1-S5, the weight ratio of citric acid to water is further 1: 50, adjusting the pH value to 20 minutes, aerating for 3 hours, and aerating for 10 minutes per hour to clean the MBR membrane.
Example 10
Example 10 differs from example 9 in that: the weight ratio of the water to the medicament A is 25: 1, adding sodium hydroxide; the weight ratio of citric acid to water is 1: 25.
example 11
Example 11 is different from example 3 in that hydrogen peroxide is used instead of sodium hypochlorite in the agent a in the same amount.
Example 12
Example 12 differs from example 4 in that the potassium monopersulfate complex salt in the agent A is replaced with potassium hypochlorite in equal amounts.
Example 13
Example 13 differs from example 5 in that the sodium lauryl sulfate in agent a is replaced equally with sodium lauryl sulfate.
Example 14
Example 14 differs from example 6 in that the substitution of polyacrylamide for the agent a is equally as a substitution for activated carbon.
Performance test
The resulting MBR membranes were cleaned and tested according to examples 1-14, and the test data is shown in Table 2.
Test method
1. Flux of membrane
Flux of membraneThe amount of fluid passing through the unit membrane area in unit time is 14-16L/square meter/h when the MBR membrane normally operates; formula for calculating membrane flux the formula for calculating membrane flux (J) is J ═ V/(T × a), where J — membrane flux (L/m)2H); v- -sample volume (L); t- -sampling time (h); a- -effective area of the membrane (m)2)；
Table 2 examples 1-14 test data table
By combining the example 3 and the example 11 and combining the table 2, it can be seen that the membrane flux after the cleaning in the example 3 is larger than that after the cleaning in the example 11, and the MBR membrane after the cleaning in the example 3 is white, while the MBR membrane after the cleaning in the example 11 is yellowish, which indicates that the compound cleaning by using sodium hypochlorite in the example 3 is better than the compound cleaning by using hydrogen peroxide in the example 11, and further indicates that the agent a in the application has a better cleaning effect for removing materials, so that the MBR membrane can be well cleaned and protected.
By combining the example 4 and the example 12 and combining the table 2, it can be seen that the membrane flux after the cleaning in the example 4 is larger than that after the cleaning in the example 12, which shows that the compound cleaning by using the potassium monopersulfate compound salt in the example 4 has a better effect than the compound cleaning by using the potassium hypochlorite in the example 12, and further shows that the agent a has a better cleaning effect on removed objects, so that the MBR membrane is well cleaned, the maintenance frequency of the MBR membrane is reduced, and the service life of the MBR membrane is prolonged.
It can be seen by combining example 5 and example 13 and table 2 that the membrane flux after the cleaning in example 5 is greater than that after the cleaning in example 13, which shows that the effect of the compound cleaning with sodium dodecyl sulfate in example 5 is better than that of the compound cleaning with sodium lauryl sulfate in example 13, and further shows that the agent a has a good cleaning effect to remove the substances, so that the MBR membrane is well cleaned, the maintenance frequency of the MBR membrane is reduced, and the service life of the MBR membrane is prolonged.
It can be seen by combining example 6 and example 14 and table 2 that the membrane flux after the cleaning in example 6 is larger than that after the cleaning in example 14, which shows that the effect of compound cleaning by using polyacrylamide in example 6 is better than that of compound cleaning by using activated carbon in example 14, and further shows that the agent a has a good cleaning effect to remove the substances, so that the MBR membrane is well cleaned, the maintenance frequency of the MBR membrane is reduced, and the service life of the MBR membrane is prolonged.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. A MBR membrane cleaning method for sewage treatment is characterized in that: the MBR membrane cleaning method comprises daily cleaning operation and maintenance cleaning operation; the daily cleaning operation comprises backwashing treatment and drug washing treatment, and the backwashing treatment is carried out when the negative pressure value of the MBR membrane is-0.035 to-0.045 MPa; and when the negative pressure value of the MBR membrane is-0.046 to-0.060 MPa, carrying out the drug washing treatment, wherein the drug washing treatment adopts a drug washing liquid A to wash the MBR membrane, and the drug washing liquid A is prepared by mixing a medicament A and water.
2. The MBR membrane cleaning method for sewage treatment according to claim 1, wherein: when the negative pressure value of the MBR membrane is-0.046 to-0.055 MPa, carrying out mild medicinal washing treatment; the mild drug washing treatment specifically adopts a drug washing liquid A to wash the MBR membrane, wherein the drug washing liquid A is prepared by mixing a drug A and water in a weight ratio of 0.95-1.05: 200 are mixed.
3. The MBR membrane cleaning method for sewage treatment according to claim 2, wherein: the steps of mild drug washing treatment are as follows: soaking the MBR membrane in the medicinal washing liquid A; soaking for 25-35min, aerating for 18-22min, soaking for 28-32min, and aerating for 13-17min, which is a medicine soaking process; the medicine soaking process is repeated for 3-5 times.
4. The MBR membrane cleaning method for sewage treatment according to claim 1, wherein: when the negative pressure value of the MBR membrane is-0.056 to-0.60 MPa, performing heavy drug washing treatment; the severe drug washing treatment specifically adopts a drug washing liquid A to wash the MBR membrane, and then adopts a drug washing liquid B to wash the MBR membrane, wherein the drug washing liquid A is prepared by mixing water and an agent A according to a weight ratio of 50: 0.95-1.05, wherein the medicinal lotion B is prepared by mixing citric acid and water in a weight ratio of 1-2: 100, mixing and forming.
5. The MBR membrane cleaning method for sewage treatment according to claim 4, wherein: the steps of the heavy drug washing treatment are as follows:
step A: draining the pond water, and removing sludge attachments on the surface of the MBR membrane;
and B: adding the medicinal lotion A into the pool, adjusting pH of the medicinal lotion A to 10-11, aerating for 18-22min, submerging for 11-13h, and aerating for 8-12min after each submerging for 1 h;
and C: emptying the medicinal lotion A, adding the medicinal lotion B into the pool, adjusting pH of the medicinal lotion B to 2-3, aerating for 18-23min, submerging for 2-5h, and aerating for 8-12min after submerging for 1 h.
6. The MBR membrane cleaning method for sewage treatment according to claim 5, wherein: the maintenance cleaning operation comprises manual cleaning treatment and immersion type soaking treatment; when 3-5 times of heavy drug washing treatment occurs in one week and the negative pressure value of the MBR membrane is-0.056 to-0.60 MPa again, carrying out manual cleaning treatment; and (5) soaking type cleaning treatment is carried out after the MBR membrane is used for 5-7 months.
7. The MBR membrane cleaning method for sewage treatment according to claim 6, wherein: the manual cleaning treatment comprises the following steps:
s1: turning off the detection equipment, pressing sludge of the MBR membrane into the aerobic tank, and controlling the sludge pressing amount according to the sludge amount;
s2: washing sludge on the surface of the MBR membrane;
s3: adding the medicinal lotion A into the pond, adjusting the pH value of the medicinal lotion A to 10-11, submerging the MBR membrane for 2-4h, submerging for 40min every time, and aerating for 8-12 min;
s4: emptying the medicine washing liquid A, washing the MBR membrane threads by rubbing, and cleaning the MBR membrane threads;
s5: adding a medicinal lotion A into the pool, adjusting the pH value of the medicinal lotion A to 10-11, soaking the MBR membrane for 1-2h, soaking for 20min every time, aerating for 8-12min, draining the medicinal liquid after cleaning, and adding water;
the medicinal lotion A in the S3 and the medicinal lotion A in the S5 are respectively prepared from water and an agent A in a weight ratio of 50: 0.95-1.05.
8. The MBR membrane cleaning method for sewage treatment according to claim 7, wherein: the soaking type membrane washing treatment is characterized in that an MBR membrane is washed by adopting a medicine washing liquid A, wherein the medicine washing liquid A is prepared by mixing an A medicament and water in a weight ratio of 25: 0.95-1.05.
9. The MBR membrane cleaning method for wastewater treatment according to any one of claims 1 to 8, wherein; the medicament A comprises the following raw materials in parts by weight:
sodium hypochlorite: 5-20 parts of
Potassium peroxymonosulfate complex salt: 0.5 to 1 portion
Sodium lauryl sulfate: 0.3 to 0.5 portion
Polyacrylamide: 0.1 to 1 portion
Deionized water: 50-200 parts.
10. The MBR membrane cleaning method for wastewater treatment according to any one of claims 1 to 8, wherein: the washing step of the back washing treatment is to reflux water passing through the water production pipe into the MBR membrane for back washing, wherein the washing time is 28-32 min.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647988A (en) * | 1994-05-30 | 1997-07-15 | Kubota Corporation | Method of back-washing submerged-type ceramic membrane separation apparatus |
| CN1772355A (en) * | 2005-11-11 | 2006-05-17 | 清华大学 | On-line chemical cleaning method for membrane bioreactor |
| JP2006167582A (en) * | 2004-12-15 | 2006-06-29 | Kurita Water Ind Ltd | Membrane filtration method of organic matter- containing water |
| CN101284213A (en) * | 2008-05-30 | 2008-10-15 | 北京汉青天朗水处理科技有限公司 | Method and apparatus for cleaning film separation equipment |
| CN107596922A (en) * | 2017-10-23 | 2018-01-19 | 华中科技大学 | A kind of combined chemical cleaning method removed fouling membrane and control accessory substance to generate |
| CN108854560A (en) * | 2017-11-15 | 2018-11-23 | 上海屹屹环境科技有限公司 | A kind of RO cleaning agents of membrane |
| CN110304688A (en) * | 2018-03-20 | 2019-10-08 | 浙江净源膜科技股份有限公司 | A kind of high-efficient treatment method and its device of steel wastewater |
-
2021
- 2021-11-05 CN CN202111308799.7A patent/CN113926313A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647988A (en) * | 1994-05-30 | 1997-07-15 | Kubota Corporation | Method of back-washing submerged-type ceramic membrane separation apparatus |
| JP2006167582A (en) * | 2004-12-15 | 2006-06-29 | Kurita Water Ind Ltd | Membrane filtration method of organic matter- containing water |
| CN1772355A (en) * | 2005-11-11 | 2006-05-17 | 清华大学 | On-line chemical cleaning method for membrane bioreactor |
| CN101284213A (en) * | 2008-05-30 | 2008-10-15 | 北京汉青天朗水处理科技有限公司 | Method and apparatus for cleaning film separation equipment |
| CN107596922A (en) * | 2017-10-23 | 2018-01-19 | 华中科技大学 | A kind of combined chemical cleaning method removed fouling membrane and control accessory substance to generate |
| CN108854560A (en) * | 2017-11-15 | 2018-11-23 | 上海屹屹环境科技有限公司 | A kind of RO cleaning agents of membrane |
| CN110304688A (en) * | 2018-03-20 | 2019-10-08 | 浙江净源膜科技股份有限公司 | A kind of high-efficient treatment method and its device of steel wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 张玉忠 等: "《液体分离膜技术及应用》", 31 January 2004, 化学工业出版社, pages: 103 - 104 * |
| 毛庆泉 等: "《膜生物反应器 污水处理与回用技术的研究和应用》", 31 December 2006, 中国矿业大学出版社, pages: 170 * |
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