CN105169953A - Enzyme cleaning agent for removing reverse osmosis membrane microbial contaminants and use method thereof - Google Patents
Enzyme cleaning agent for removing reverse osmosis membrane microbial contaminants and use method thereof Download PDFInfo
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- CN105169953A CN105169953A CN201510627866.XA CN201510627866A CN105169953A CN 105169953 A CN105169953 A CN 105169953A CN 201510627866 A CN201510627866 A CN 201510627866A CN 105169953 A CN105169953 A CN 105169953A
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Abstract
The invention provides an enzyme cleaning agent for removing reverse osmosis membrane microbial contaminants and a use method thereof. The enzyme cleaning agent is prepared from, on the dry basis and by weight, 10%-30% of lysozyme, 5%-20% of lipase, 5%-20% of glucanase, 10%-30% of protease, 5%-30% of chitinase, 5%-20% of pectinase, 1%-5% of stabilizer A and 0.5%-2% of stabilizer B. The substances are mixed and prepared into concentrated liquor through distilled water, and the concentrated liquor is used for cleaning a reverse osmosis membrane in microbial contamination. The use method includes the cleaning steps that the concentrated liquor is distilled into working liquor with the weight percentage concentration of 1%o-1% through water; the PH value of the working liquor ranges from 5 to 10; the working liquor is used for cyclically cleaning the reverse osmosis membrane for 5-6 hours on the occasion of cleaning, and then reverse osmosis produced water is used for washing. The cleaning agent can damage the cell wall structures of contaminants, is good in cleaning effect, and can improve the operating state of a system and prolong the service life of the reverse osmosis membrane.
Description
Technical field
The present invention relates to a kind of water treatment cleaning agent, particularly relating to a kind of for cleaning counter-infiltration
The enzyme matter cleaning agent that membrane micro pollutes.
Background technology
The reverse osmosis technology that purifying water process adopts is the new membrane separation technique of of growing up the sixties, is the process relying on reverse osmosis membrane to make the solvent in solution be separated with solute under stress.The pollution being subject to suspension in water, colloid, microorganism, foulant and organic matter etc. due to reverse osmosis membrane in running is made film formation surface and is covered pollutant, generally has three kinds of situations can make reverse osmosis membrane hydraulic performance decline: one is the oxidation of hydrolysis, free chlorine etc. and the effect of strong acid and strong base that the chemical change of reverse osmosis membrane itself comprises reverse osmosis membrane; Two is physical changes of reverse osmosis membrane itself, comprises densification, counter-pressure effect makes film be destroyed; Three is that reverse osmosis membrane is contaminated, and this mainly comprises foulant, microorganism, colloid, suspension, organic matter etc. in face and internal contamination blocking.These three kinds of situations all can make reverse osmosis membrane hydraulic performance decline, and cause intake pressure rising, aquifer yield decline, salt rejection rate to decline, and directly affect the normal operation of reverse osmosis unit.In order to overcome the generation of these three kinds of situations, mainly adopt suitable Water pretreatrnent measure at present, strict control reverse osmosis unit influent quality, and after reverse osmosis membrane fouling membrane, adopt suitable chemical agent cleaning to solve the problems referred to above.
Chinese patent CN102553452B discloses one " for cleaning cleaning agents of membrane and the using method thereof of reverse osmosis membrane ", be divided into acidity or alkaline cleaner, be mainly used in cleaning the poly-propionamide pollutant on reverse osmosis membrane, organic sediment on the reverse osmosis membrane pollutant that such as foundry loam, fungi, mould generate is difficult to remove, the technical scheme of not mentioned enzyme matter cleaning agent in content disclosed in it.
Described organic sediment is generated by bacterium foundry loam, fungi, mould etc., and the more difficult removal of this pollutant, especially when water-feeding path is completely plugged.Water-feeding path blocking can make the water inlet cleaned be difficult to full and uniform entering in membrane component.For suppressing this sedimental further growth, importantly not only to clean and safeguard reverse osmosis membrane (RO) system, also wanting cleaning pretreatment, pipeline and termination etc. simultaneously.Conventional method is with bactericide as after DBNPA deactivation, with the alkaline cleaner cleaning being added with anion surfactant.The method is difficult to thoroughly remove mushroom foundry loam, and once strengthen alkali charge in order to the cleaning performance reached, likely causes the irreversible destruction of membrane component.
Summary of the invention
In order to solve prior art Problems existing, the present invention's first object is to provide a kind of enzyme matter cleaning agent for cleaning reverse osmosis membrane microbial contamination, the pollutant that this cleaning agent generates for organic sediment such as foundry loam, fungi, the mould cleaned on reverse osmosis membrane.Second object is to provide the method for the reverse osmosis membrane of a kind of enzyme matter cleaning agent cleaning microbial contamination.
For achieving the above object, the present invention is by the following technical solutions:
A kind of enzyme matter cleaning agent for cleaning reverse osmosis membrane microbial contamination, the component of following weight percentage is comprised: lysozyme 10 ~ 30% in this cleaning agent of butt, lipase 5 ~ 20%, dextranase 5 ~ 20%, protease 10 ~ 30%, chitinase 5 ~ 30%, pectase 5 ~ 20%, stabilizing agent A1 ~ 5%, stabilizing agent B0.5 ~ 2%, above-mentioned substance mixing distilled water is mixed with the concentrate that weight percent concentration is 5 ~ 10%, is store for future use under the environment of 4-10 DEG C in temperature, cleans with the reverse osmosis membrane of this concentrate to microbial contamination.
As preferably, in the weight percent content of each component of butt reverse osmosis membrane cleaning enzyme matter cleaning agent be: lysozyme 30%, lipase 5%, dextranase 10%, protease 25%, chitinase 1 serving 5%, pectase 10%, stabilizing agent A4%, stabilizing agent B1%, above-mentioned substance mixing distilled water is mixed with weight percent concentration be 8% concentrate be store for future use under the environment of 5 DEG C in temperature.
As preferably, in the weight percent content of each component of butt reverse osmosis membrane cleaning enzyme matter cleaning agent be: lysozyme 10%, lipase 10%, dextranase 10%, protease 20%, chitinase 30%, pectase 15%, stabilizing agent A4%, stabilizing agent B1% be mixed with weight percent concentration be 5% concentrate be store for future use under the environment of 5 DEG C in temperature.
As preferably, described stabilizing agent A is sucrose, and stabilizing agent B is potassium dihydrogen phosphate.
A using method for the enzyme matter cleaning agent of reverse osmosis membrane microbial contamination, the cleaning step for the reverse osmosis membrane of microbial contamination is:
A. by concentrate dilute with water, the working solution that weight percent concentration is 1 ‰-1% is diluted to;
B. the pH value of working solution is between 5-10;
C. occasion of rinsing: when following symptom appears in counter-infiltration system, needs to carry out Chemical cleaning: under bio-occlusion water pressure, and aquifer yield calibration constant value declines 10 ~ 15%; For maintaining normal aquifer yield, the feed pressure after temperature correction increases by 10 ~ 15%; Produce water water quality and reduce by 10 ~ 15%, desalination rate increases by 10 ~ 15%; Between each section of system, pressure reduction obviously increases, and prepares cleaning;
D. cleaning method: with working solution wash cycles 5-6 hour, then rinse with reverse osmosis produced water.
Compared with prior art, the present invention utilizes the high selectivity of enzyme preparation, and making to clean film surface organic matter deposition under mild conditions becomes possibility.Gram-positive bacteria mainly relies on peptide polysaccharide to maintain structure and the shape of cell membrane, and additional lysozyme, acts on the β-Isosorbide-5-Nitrae-glycosidic bond of peptide polysaccharide, and make its cell wall damage; Gram-negative bacteria mainly relies on lipid and polysaccharide to maintain structure and the shape of cell membrane, outer lipase and lysozyme, makes lipid and peptide polysaccharide hydrolysis, and makes its cell wall damage; Fungal cell wall is based on mannosan and glucan, and additional 1,4 beta-glucanase, makes β-1, the 3-glucan of its cell membrane be hydrolyzed; Fungal cell wall is based on chitin, and additional chitinase, can destroy its cell wall structure.Cleaning performance is good, can improve the operation conditions of system, extends the service life of reverse osmosis membrane.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1 pollutant is based on der Pilz.
The enzyme matter cleaning agent of cleaning reverse osmosis membrane microbial contamination is in butt, comprise the component of following weight percentage: lysozyme 30%, lipase 5%, dextranase 10%, protease 25%, chitinase 1 serving 5%, pectase 10%, sucrose 4%, potassium dihydrogen phosphate 1%, above-mentioned substance mixing distilled water is prepared the suspension of thousands of points three, save backup under the environment of 4-10 DEG C.
Occasion of rinsing: when following symptom appears in counter-infiltration system (or device): under bio-occlusion water pressure, aquifer yield calibration constant value declines 10 ~ 15%; For maintaining normal aquifer yield, the feed pressure after temperature correction increases by 10 ~ 15%; Produce water water quality and reduce by 10 ~ 15%, desalination rate increases by 10 ~ 15%; When between each section of system, pressure reduction obviously increases, need to carry out Chemical cleaning:
Cleaning method: enzyme matter cleaning agent (concentrate) is deployed into the working solution that weight percent concentration is 3/1000ths with reverse osmosis produced water, at 25 ~ 35 DEG C, under the condition of PH6 ~ 8, the reverse osmosis membrane polluted by der Pilz by above-mentioned working solution wash cycles 6 hours, then rinses again with reverse osmosis produced water.Thoroughly remove Browning.
Embodiment 2
Pollutant is based on mould
The enzyme matter cleaning agent of cleaning reverse osmosis membrane microbial contamination is in butt, comprise the component of following weight percentage: lysozyme 10%, lipase 10%, dextranase 10%, protease 20%, chitinase 30%, pectase 15%, sucrose 4%, potassium dihydrogen phosphate 1%, above-mentioned substance mixing distilled water is made into the concentrate that weight percent concentration is 4/1000ths, saves backup under the environment of 4-10 DEG C.
Occasion of rinsing: when following symptom appears in counter-infiltration system or device: under bio-occlusion water pressure, aquifer yield calibration constant value declines 10 ~ 15%; For maintaining normal aquifer yield, the feed pressure after temperature correction increases by 10 ~ 15%; Produce water water quality and reduce by 10 ~ 15%, desalination rate increases by 10 ~ 15%; When between each section of system, pressure reduction obviously increases, need to carry out Chemical cleaning:
Cleaning method: enzyme matter cleaning agent (concentrate) is deployed into the working solution that weight percent concentration is 4/1000ths with reverse osmosis produced water, at 30 ~ 40 DEG C, under the condition of PH5.5 ~ 6.5, by above-mentioned working solution wash cycles by the reverse osmosis membrane of mould contamination 5 hours, then again rinse with reverse osmosis produced water, thoroughly remove Browning.
Above-described embodiment only have expressed one embodiment of the present invention, but therefore can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (5)
1. one kind for cleaning the enzyme matter cleaning agent of reverse osmosis membrane microbial contamination, it is characterized in that, the component of following weight percentage is comprised: lysozyme 10 ~ 30% in this cleaning agent of butt, lipase 5 ~ 20%, dextranase 5 ~ 20%, protease 10 ~ 30%, chitinase 5 ~ 30%, pectase 5 ~ 20%, stabilizing agent A1 ~ 5%, stabilizing agent B0.5 ~ 2%, above-mentioned substance mixing distilled water is mixed with the concentrate that weight percent concentration is 5 ~ 10%, be store for future use under the environment of 4-10 DEG C in temperature, clean with the reverse osmosis membrane of this concentrate to microbial contamination.
2. the enzyme matter cleaning agent for cleaning reverse osmosis membrane microbial contamination according to claim 1, it is characterized in that, in the weight percent content of each component of butt reverse osmosis membrane cleaning enzyme matter cleaning agent be: lysozyme 30%, lipase 5%, dextranase 10%, protease 25%, chitinase 1 serving 5%, pectase 10%, stabilizing agent A4%, stabilizing agent B1%, above-mentioned substance mixing distilled water is mixed with weight percent concentration be 8% concentrate be store for future use under the environment of 5 DEG C in temperature.
3. the enzyme matter cleaning agent for cleaning reverse osmosis membrane microbial contamination according to claim 1, it is characterized in that, in the weight percent content of each component of butt reverse osmosis membrane cleaning enzyme matter cleaning agent be: lysozyme 10%, lipase 10%, dextranase 10%, protease 20%, chitinase 30%, pectase 15%, stabilizing agent A4%, stabilizing agent B1% be mixed with weight percent concentration be 5% concentrate be store for future use under the environment of 5 DEG C in temperature.
4. the enzyme matter cleaning agent of the cleaning reverse osmosis membrane microbial contamination according to any one of claim 1-3, is characterized in that, described stabilizing agent A is sucrose, and stabilizing agent B is potassium dihydrogen phosphate.
5. a using method for the enzyme matter cleaning agent of reverse osmosis membrane microbial contamination as claimed in claim 1, it is characterized in that, the cleaning step for the reverse osmosis membrane of microbial contamination is:
A. by concentrate dilute with water, the working solution that weight percent concentration is 1 ‰-1% is diluted to;
B. the pH value of described working solution is between 5-10;
C. occasion of rinsing: when following symptom appears in counter-infiltration system, needs to carry out Chemical cleaning: under bio-occlusion water pressure, and aquifer yield calibration constant value declines 10 ~ 15%; For maintaining normal aquifer yield, the feed pressure after temperature correction increases by 10 ~ 15%; Produce water water quality and reduce by 10 ~ 15%, desalination rate increases by 10 ~ 15%; Between each section of system, pressure reduction obviously increases, and prepares cleaning;
D. cleaning method: with working solution wash cycles 5-6 hour, then rinse with reverse osmosis produced water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510627866.XA CN105169953A (en) | 2015-09-29 | 2015-09-29 | Enzyme cleaning agent for removing reverse osmosis membrane microbial contaminants and use method thereof |
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| CN201510627866.XA CN105169953A (en) | 2015-09-29 | 2015-09-29 | Enzyme cleaning agent for removing reverse osmosis membrane microbial contaminants and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731860A (en) * | 2017-01-09 | 2017-05-31 | 唐山钢铁集团有限责任公司 | The polynary organic solvent combination biological agent cleaning agent of reverse osmosis membrane and application method |
| CN110898674A (en) * | 2019-11-29 | 2020-03-24 | 江苏大储宝环境科技有限公司 | Water purifier reverse osmosis membrane cleaning agent and preparation method thereof |
Citations (8)
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|---|---|---|---|---|
| DE3741583A1 (en) * | 1986-12-12 | 1988-06-23 | Kemira Oy | Method for destroying microbes in process water of paper-mills |
| WO1996031610A2 (en) * | 1995-04-07 | 1996-10-10 | Betzdearborn Inc. | Exopolysaccharide degrading enzyme and use of the same |
| WO1997002753A1 (en) * | 1995-07-12 | 1997-01-30 | Novo Nordisk A/S | Cleaning-in-place with a solution containing a protease and a lipase |
| US5686297A (en) * | 1991-08-30 | 1997-11-11 | United Laboratories International, Llc | Method of cleaning contaminated industrial equipment |
| US20030047510A1 (en) * | 2001-09-07 | 2003-03-13 | Baldridge John W. | Biofilm reduction in crossflow filtration systems |
| EP1656987A1 (en) * | 2004-11-16 | 2006-05-17 | JohnsonDiversey, Inc. | Process for cleaning a filtration membrane |
| CN1970743A (en) * | 2006-11-28 | 2007-05-30 | 天津达美科技有限公司 | Ultrafiltration cleaning of enzyme |
| CN103143262A (en) * | 2011-12-07 | 2013-06-12 | 中国石油化工股份有限公司 | Cleaning agent composition and cleaning method for reverse osmosis membrane |
-
2015
- 2015-09-29 CN CN201510627866.XA patent/CN105169953A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3741583A1 (en) * | 1986-12-12 | 1988-06-23 | Kemira Oy | Method for destroying microbes in process water of paper-mills |
| US5686297A (en) * | 1991-08-30 | 1997-11-11 | United Laboratories International, Llc | Method of cleaning contaminated industrial equipment |
| WO1996031610A2 (en) * | 1995-04-07 | 1996-10-10 | Betzdearborn Inc. | Exopolysaccharide degrading enzyme and use of the same |
| WO1997002753A1 (en) * | 1995-07-12 | 1997-01-30 | Novo Nordisk A/S | Cleaning-in-place with a solution containing a protease and a lipase |
| US20030047510A1 (en) * | 2001-09-07 | 2003-03-13 | Baldridge John W. | Biofilm reduction in crossflow filtration systems |
| EP1656987A1 (en) * | 2004-11-16 | 2006-05-17 | JohnsonDiversey, Inc. | Process for cleaning a filtration membrane |
| CN1970743A (en) * | 2006-11-28 | 2007-05-30 | 天津达美科技有限公司 | Ultrafiltration cleaning of enzyme |
| CN103143262A (en) * | 2011-12-07 | 2013-06-12 | 中国石油化工股份有限公司 | Cleaning agent composition and cleaning method for reverse osmosis membrane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731860A (en) * | 2017-01-09 | 2017-05-31 | 唐山钢铁集团有限责任公司 | The polynary organic solvent combination biological agent cleaning agent of reverse osmosis membrane and application method |
| CN110898674A (en) * | 2019-11-29 | 2020-03-24 | 江苏大储宝环境科技有限公司 | Water purifier reverse osmosis membrane cleaning agent and preparation method thereof |
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Application publication date: 20151223 |