CN114191999A - Biological pollution resistance modification method for water treatment membrane material - Google Patents
Biological pollution resistance modification method for water treatment membrane material Download PDFInfo
- Publication number
- CN114191999A CN114191999A CN202111311590.6A CN202111311590A CN114191999A CN 114191999 A CN114191999 A CN 114191999A CN 202111311590 A CN202111311590 A CN 202111311590A CN 114191999 A CN114191999 A CN 114191999A
- Authority
- CN
- China
- Prior art keywords
- membrane
- water treatment
- solution
- modification method
- membrane material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 28
- 238000002715 modification method Methods 0.000 title claims abstract description 17
- 229940123361 Quorum sensing inhibitor Drugs 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000000108 ultra-filtration Methods 0.000 claims description 22
- 230000004048 modification Effects 0.000 claims description 20
- 238000012986 modification Methods 0.000 claims description 20
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 claims description 18
- 235000012141 vanillin Nutrition 0.000 claims description 18
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 claims description 18
- 238000001223 reverse osmosis Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 229920001661 Chitosan Chemical class 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 239000003607 modifier Substances 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 5
- REFJWTPEDVJJIY-UHFFFAOYSA-N Quercetin Chemical compound C=1C(O)=CC(O)=C(C(C=2O)=O)C=1OC=2C1=CC=C(O)C(O)=C1 REFJWTPEDVJJIY-UHFFFAOYSA-N 0.000 claims description 4
- VFLDPWHFBUODDF-FCXRPNKRSA-N curcumin Chemical compound C1=C(O)C(OC)=CC(\C=C\C(=O)CC(=O)\C=C\C=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-FCXRPNKRSA-N 0.000 claims description 4
- ZCCUUQDIBDJBTK-UHFFFAOYSA-N psoralen Chemical compound C1=C2OC(=O)C=CC2=CC2=C1OC=C2 ZCCUUQDIBDJBTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- FTVWIRXFELQLPI-ZDUSSCGKSA-N (S)-naringenin Chemical compound C1=CC(O)=CC=C1[C@H]1OC2=CC(O)=CC(O)=C2C(=O)C1 FTVWIRXFELQLPI-ZDUSSCGKSA-N 0.000 claims description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical class CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 2
- QJPWUUJVYOJNMH-VKHMYHEASA-N L-homoserine lactone Chemical class N[C@H]1CCOC1=O QJPWUUJVYOJNMH-VKHMYHEASA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Chemical class 0.000 claims description 2
- ZVOLCUVKHLEPEV-UHFFFAOYSA-N Quercetagetin Natural products C1=C(O)C(O)=CC=C1C1=C(O)C(=O)C2=C(O)C(O)=C(O)C=C2O1 ZVOLCUVKHLEPEV-UHFFFAOYSA-N 0.000 claims description 2
- QNVSXXGDAPORNA-UHFFFAOYSA-N Resveratrol Natural products OC1=CC=CC(C=CC=2C=C(O)C(O)=CC=2)=C1 QNVSXXGDAPORNA-UHFFFAOYSA-N 0.000 claims description 2
- HWTZYBCRDDUBJY-UHFFFAOYSA-N Rhynchosin Natural products C1=C(O)C(O)=CC=C1C1=C(O)C(=O)C2=CC(O)=C(O)C=C2O1 HWTZYBCRDDUBJY-UHFFFAOYSA-N 0.000 claims description 2
- LUKBXSAWLPMMSZ-OWOJBTEDSA-N Trans-resveratrol Chemical compound C1=CC(O)=CC=C1\C=C\C1=CC(O)=CC(O)=C1 LUKBXSAWLPMMSZ-OWOJBTEDSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- RECUKUPTGUEGMW-UHFFFAOYSA-N carvacrol Chemical compound CC(C)C1=CC=C(C)C(O)=C1 RECUKUPTGUEGMW-UHFFFAOYSA-N 0.000 claims description 2
- HHTWOMMSBMNRKP-UHFFFAOYSA-N carvacrol Natural products CC(=C)C1=CC=C(C)C(O)=C1 HHTWOMMSBMNRKP-UHFFFAOYSA-N 0.000 claims description 2
- 235000007746 carvacrol Nutrition 0.000 claims description 2
- 239000001913 cellulose Chemical class 0.000 claims description 2
- 229920002678 cellulose Chemical class 0.000 claims description 2
- 235000012754 curcumin Nutrition 0.000 claims description 2
- 229940109262 curcumin Drugs 0.000 claims description 2
- 239000004148 curcumin Substances 0.000 claims description 2
- VFLDPWHFBUODDF-UHFFFAOYSA-N diferuloylmethane Natural products C1=C(O)C(OC)=CC(C=CC(=O)CC(=O)C=CC=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-UHFFFAOYSA-N 0.000 claims description 2
- 150000002241 furanones Chemical class 0.000 claims description 2
- WYXXLXHHWYNKJF-UHFFFAOYSA-N isocarvacrol Natural products CC(C)C1=CC=C(O)C(C)=C1 WYXXLXHHWYNKJF-UHFFFAOYSA-N 0.000 claims description 2
- MWDZOUNAPSSOEL-UHFFFAOYSA-N kaempferol Natural products OC1=C(C(=O)c2cc(O)cc(O)c2O1)c3ccc(O)cc3 MWDZOUNAPSSOEL-UHFFFAOYSA-N 0.000 claims description 2
- 238000001471 micro-filtration Methods 0.000 claims description 2
- 238000001728 nano-filtration Methods 0.000 claims description 2
- 229940117954 naringenin Drugs 0.000 claims description 2
- WGEYAGZBLYNDFV-UHFFFAOYSA-N naringenin Natural products C1(=O)C2=C(O)C=C(O)C=C2OC(C1)C1=CC=C(CC1)O WGEYAGZBLYNDFV-UHFFFAOYSA-N 0.000 claims description 2
- 235000007625 naringenin Nutrition 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920001690 polydopamine Chemical class 0.000 claims description 2
- 229920002451 polyvinyl alcohol Chemical class 0.000 claims description 2
- 229960001285 quercetin Drugs 0.000 claims description 2
- 235000005875 quercetin Nutrition 0.000 claims description 2
- 229940016667 resveratrol Drugs 0.000 claims description 2
- 235000021283 resveratrol Nutrition 0.000 claims description 2
- 235000010413 sodium alginate Nutrition 0.000 claims description 2
- 239000000661 sodium alginate Substances 0.000 claims description 2
- 229940005550 sodium alginate Drugs 0.000 claims description 2
- 238000011109 contamination Methods 0.000 claims 4
- 241000894006 Bacteria Species 0.000 abstract description 11
- 230000035699 permeability Effects 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract 1
- 238000004220 aggregation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 25
- 241000588724 Escherichia coli Species 0.000 description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- 239000010408 film Substances 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000001963 growth medium Substances 0.000 description 6
- 239000002609 medium Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000018612 quorum sensing Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000001580 bacterial effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000012258 culturing Methods 0.000 description 3
- 238000005374 membrane filtration Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000003385 bacteriostatic effect Effects 0.000 description 2
- 230000032770 biofilm formation Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000034309 Bacterial disease carrier Diseases 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000012136 culture method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000036619 pore blockages Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000005962 receptors Human genes 0.000 description 1
- 108020003175 receptors Proteins 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/56—Polyamides, e.g. polyester-amides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/14—Membrane materials having negatively charged functional groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of membranes, and discloses a biological pollution resistance modification method for a water treatment membrane material. The quorum sensing inhibitor and the film forming agent are utilized to prepare a modified solution, and then the modified solution containing the quorum sensing inhibitor is uniformly coated on the surface of the film; the film forming agent forms a film on the surface of the film in the constant-temperature drying process, so that the quorum sensing inhibitor is fixed on the film. The modified membrane can inhibit the aggregation growth of bacteria on the surface of the membrane and the formation of a biological membrane, simultaneously maintain the water permeability, the hydrophilicity and the surface negative charge of the membrane, reduce biological pollution and improve the water treatment efficiency.
Description
Technical Field
The invention belongs to the technical field of membranes, and particularly relates to a biological pollution resistance modification method for a water treatment membrane material.
Background
The market share of membrane separation technology in the field of water treatment is rapidly increasing, and the membrane separation technology becomes a strategic technology for solving water pollution and water resource shortage. The membrane pollution is one of the main bottleneck problems restricting the application of the membrane water treatment technology, in particular to the membrane surface deposition and the membrane pore blockage caused by microorganisms and metabolites thereof, so that the water permeability and the separation characteristic of the membrane are irreversibly changed, the water yield and the effluent quality are reduced, the energy consumption is increased, and even the service life of the membrane is shortened. Research and development of anti-pollution membrane materials are the key to controlling membrane pollution. The preparation and modification of membrane materials based on biological methods are the leading directions of membrane material research. During the process of adhering and colonizing free bacteria to the membrane surface, various autoinducers can be generated and secreted extracellularly as signal molecules for the information transmission between species and species. When the density of the bacteria reaches a certain level and the concentration of the signal molecules reaches a threshold value, the bacteria can start the expression of density-dependent specific genes and regulate the physiological characteristics of the population, such as biofilm formation and the like, and the phenomenon is called quorum sensing of the bacteria. Quorum sensing systems have been found in a variety of gram-negative and positive bacteria. Quorum sensing has a significant impact on bacterial colonization, as well as on the maturation, morphology, disintegration, and chemical resistance of biofilms. The technology is a new method for controlling membrane pollution by interfering the quorum sensing path of bacteria and regulating the formation of a biological membrane of the bacteria through the ways of inhibiting the generation and degradation of signal molecules, preventing the combination of the signal molecules and receptor proteins and the like, thereby achieving the purpose of preventing or controlling biological pollution. In recent years, a number of novel quorum sensing inhibitors have been discovered. At present, the quorum sensing inhibitor is mainly applied to membrane biological pollution control by adding a free or carrier immobilized inhibitor into a membrane filtration system, and the long-acting property and the application cost of the regulation and control effect are difficult to control. And the modification of the membrane material based on the quorum sensing inhibitor has great stability and application potential in biological pollution control.
Disclosure of Invention
Aiming at the technical problem of difficult control of biological pollution of a water treatment membrane, the invention provides a method for modifying the pollution resistance of a membrane material.
The present invention achieves the above-described object by the following technical means.
A water treatment membrane material biological pollution resistance modification method comprises the following steps:
(1) adding a certain amount of film forming agent into a solvent, heating and stirring at a constant temperature to prepare a film forming agent solution;
(2) adding the quorum sensing inhibitor into the film forming agent solution according to a certain proportion, heating and stirring at a constant temperature to uniformly disperse the inhibitor in the solution, and preparing to obtain a modified solution;
(3) uniformly coating the modified solution containing the quorum sensing inhibitor on the surface of the membrane;
(4) and (3) drying the film with the coated surface in a constant-temperature heating device, wherein the film forming agent forms a film in the drying process and is adhered to the surface of the film, so that the modifier is fixed on the film.
In the step (1), the film-forming agent is one of sodium alginate, chitosan, polyvinyl alcohol, polydopamine, cellulose derivatives or polyacrylamide, and in the film-forming agent solution, the mass percentage concentration of the film-forming agent is 0.01-10.0%, preferably 0.1-1.0%;
in the step (1), the solvent is one of water, dilute acid solution or dilute alkali solution, and the pH value is 3-11.
In the step (2), the quorum sensing inhibitor is one of curcumin, carvacrol, vanillin, furocoumarin, resveratrol, quercetin, naringenin, or furanone compounds and modified homoserine lactone compounds, and preferably an inhibitor which is non-toxic to human bodies and environments;
in the step (2), the mass percentage concentration of the quorum sensing inhibitor in the modified solution is 0.01-5.0%, and the preferred mass percentage concentration is 0.1-1.0%;
in the step (2), the heating temperature is 30-80 ℃, preferably 30-60 ℃; the heating time is 10min-24h, preferably 10min-6 h.
In the step (3), the membrane comprises one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane;
in the step (3), the coating thickness of the modification solution is 0.01-5.0mm, and the preferable thickness is 0.05-1.0 mm;
in the step (4), the drying temperature is 30 to 80 ℃, preferably 40 to 60 ℃.
The invention has the beneficial effects that:
the modification method of the membrane material disclosed by the invention enables the water treatment membrane material to have better surface characteristics (such as hydrophilicity, surface negative charge and the like), and the quorum sensing inhibitor can interfere signal transmission among bacteria, regulate and control the expression of quorum density-dependent physiological characteristics such as extracellular polymer synthesis, biofilm formation and the like, so that the bacteria are difficult to attach to the membrane surface, the form and disintegration and diffusion of the biofilm are influenced, the biological pollution resistance of the membrane material is improved, and the reduction of water treatment efficiency caused by biological pollution is reduced. The invention carries out the modification of the membrane material based on quorum sensing, provides a new idea for controlling the membrane biological pollution, and can be used for solving the membrane pollution problem in the field of membrane water treatment. The method has the advantages of simple operation, strong applicability, no adverse effect of the used materials on human bodies, organisms and environment, and the like, and is suitable for industrial production application.
Drawings
FIG. 1 is a graph showing bacteriostatic effects of the inhibitors of examples 1 and 2, wherein (a) is LB plate medium; (b) LB plate culture medium for inoculating colibacillus; (c) inoculating escherichia coli, and adding an LB plate culture medium with vanillin of which the mass fraction is 0.1%; (d) inoculating escherichia coli, and adding an LB plate culture medium with vanillin of which the mass fraction is 0.3%; (e) inoculating escherichia coli, and adding an LB plate culture medium with vanillin of which the mass fraction is 0.5%. The medium was incubated at 37 ℃ for 48 hours and then observed.
FIG. 2 is a surface microtopography of the membrane before and after modification in example 1, wherein (a) is an unmodified ultrafiltration membrane; (b) the modified ultrafiltration membrane is obtained.
FIG. 3 is a surface microtopography of the membrane before and after modification in example 2, wherein (a) is an unmodified reverse osmosis membrane; (b) is a modified reverse osmosis membrane.
FIG. 4 is a graph showing membrane separation performance before and after modification in examples 1 and 2, wherein (a) is water permeability of an ultrafiltration membrane before and after modification; (b) the water permeability and salt rejection of the reverse osmosis membrane before and after modification.
FIG. 5 is the E.coli adsorption kinetics of the membrane surface before and after modification in example 1, wherein (a) (c) (e) (g) are surface SEM images of unmodified ultrafiltration membrane after culturing for 4h, 8h, 12h and 24h with E.coli; (b) and (d) (f) (h) are surface SEM pictures of the modified ultrafiltration membrane after being cultured for 4h, 8h, 12h and 24h with Escherichia coli respectively.
FIG. 6 is the E.coli adsorption kinetics before and after modification of the membrane surface in example 2, wherein (a) (c) (e) (g) are surface SEM images of an unmodified reverse osmosis membrane and E.coli after 4h, 8h, 12h and 24h of culture, respectively; (b) and (d) (f) (h) are surface SEM images of the modified reverse osmosis membrane and the Escherichia coli after being cultured for 4h, 8h, 12h and 24h respectively.
FIG. 7 is an SEM image of the membrane surface after the membrane filtration experiment in example 1, wherein (a) is the surface biofouling of the unmodified ultrafiltration membrane; (b) the biological pollution condition on the surface of the modified ultrafiltration membrane is shown.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Example 1
(1) Preparing 0.2 percent (mass fraction) of dilute acetic acid aqueous solution, adding chitosan into the dilute acetic acid solution, heating at constant temperature (30 ℃) and stirring to prepare 0.1 percent of chitosan solution;
(2) adding vanillin into chitosan solution, heating at constant temperature (30 deg.C), stirring, and making into 0.1% vanillin solution;
(3) uniformly coating the vanillin solution on the surface of an ultrafiltration membrane (UF), wherein the thickness of the solution coating is 60 mu m;
(4) and (3) drying the membrane subjected to surface coating in a 40 ℃ oven at constant temperature, wherein a coating layer forms a thin film in the drying process, and a modifier is fixed on the surface of the membrane to prepare the stable modified ultrafiltration membrane (UF-CV 1).
Example 2
(1) Preparing 0.2 percent (mass fraction) of dilute acetic acid aqueous solution, adding chitosan into the dilute acetic acid solution, heating at constant temperature (30 ℃) and stirring to prepare 0.1 percent of chitosan solution;
(2) adding vanillin into chitosan solution, heating at constant temperature (30 deg.C), stirring, and making into 0.1% vanillin solution;
(3) uniformly coating the vanillin solution on the surface of a reverse osmosis membrane (RO), wherein the thickness of the coating of the solution is 60 mu m;
(4) and (3) drying the membrane with the coated surface in a 40 ℃ oven at constant temperature, forming a film by the coating in the drying process, and fixing a modifier on the surface of the membrane to obtain the stable modified reverse osmosis membrane (RO-CV 1).
Analysis of bacteriostatic Properties of modifier
The plate culture method was used to culture escherichia coli cells (OD600 ═ 0.5) in the following ratio of 1: 50, then adding a certain amount of vanillin, uniformly mixing to prepare a culture medium containing 0.1%, 0.3% and 0.5% (mass fraction) of vanillin, pouring the obtained semisolid culture medium into a culture dish, and culturing at constant temperature (37 ℃) for 48 hours, wherein the result is shown in figure 1. As can be seen in fig. 1, a large number of colonies appeared on the medium inoculated with escherichia coli (fig. 1(b)) compared to the blank medium (fig. 1(a)), growth of escherichia coli was inhibited on the medium added with vanillin (fig. 1(c) - (e)), and no colonies of escherichia coli were observed on the plates added with 0.3% and 0.5% of vanillin, indicating that vanillin had a significant inhibitory effect on bacterial growth.
Characterization of film surface characteristics
The micro-morphologies of the surfaces of the ultrafiltration membrane and the reverse osmosis membrane before and after modification in examples 1 and 2 were analyzed, and the SEM observation results are shown in fig. 2 and 3. As can be seen in FIG. 2, the vanillin/chitosan modified coating had no significant effect on the surface roughness of the ultrafiltration membrane UF-CV1, and the pore structure became denser. FIG. 3 shows that the surface appearance of the reverse osmosis membrane (RO-CV1) is smoother after the reverse osmosis membrane is coated by the vanillin/chitosan solution.
The hydrophilicity and surface potential of the unmodified ultrafiltration membrane UF and the modified ultrafiltration membrane UF-CV1 were analyzed, and the results are shown in Table 1. As can be seen from Table 1, the modified membrane surface still has good hydrophilicity, and zeta potential maintains electronegativity, so that microorganisms are difficult to attach to the membrane surface, and the anti-biological pollution capability of the membrane is improved.
TABLE 1 contact angle and surface potential of ultrafiltration membrane before and after modification
Analysis of Membrane separation Performance
The separation performance of the ultrafiltration membrane and the reverse osmosis membrane before and after modification in examples 1 and 2 was analyzed. The ultrafiltration membrane of example 1 was tested for water permeability using pure water as feed water at 25 ℃ and a transmembrane pressure difference of 1bar, and the results are shown in FIG. 4 (a). As can be seen from fig. 4(a), the water permeability of the modified ultrafiltration membrane is reduced, but still remains within the applicable range of practical operation. The reverse osmosis membrane related to the embodiment 2 adopts pure water as inlet water, and the water permeability is tested at 25 ℃ and 10bar of transmembrane pressure difference; the salt cut-off was measured at 25 ℃ and a transmembrane pressure difference of 10bar using a NaCl solution as the feed water, and the results are shown in FIG. 4 (b). As can be seen in FIG. 4(b), the reverse osmosis membrane still maintains high water permeability and salt rejection after modification.
Analysis of Membrane for anti-biofouling Performance
The modified membrane materials prepared in examples 1 and 2 were analyzed for their antibacterial adsorption properties. The unmodified and modified membrane samples were placed in well plates, 3ml LB medium and 50. mu.L Escherichia coli liquid were added to each well, and the mixture was cultured in a shaker (37 ℃ C., 100r/min) at constant temperature. After culturing for 4h, 8h, 12h and 24h, the membrane samples were taken out from the well plate, subjected to bacterial immobilization and observed on the surface of the membrane for bacterial adsorption by SEM, and the results are shown in FIGS. 5 and 6. As can be seen from FIGS. 5 and 6, the bacterial adsorption on the surfaces of the ultrafiltration membrane UF-CV1 and the reverse osmosis membrane RO-CV1 after modification is reduced, and the growth of flora is obviously slowed down. Dense biological membranes are quickly formed on the surfaces of the unmodified ultrafiltration membrane UF and the reverse osmosis membrane RO, and the biological membranes on the surfaces of the UF-CV1 and the RO-CV1 are slow in forming and sparse in shape. Examples 1 and 2 the membrane materials prepared by coating with the modified solution containing quorum sensing inhibitor have good antibacterial adsorption performance.
The modified ultrafiltration membrane prepared in example 1 was evaluated for anti-biofouling performance in water treatment applications. The simulated secondary effluent inoculated with escherichia coli was used as influent and membrane filtration experiments were performed at 25 ℃ and 1bar transmembrane pressure differential. After running for 8h, a membrane sample is taken out, and the morphology of the biological membrane on the surface of the membrane is observed by adopting SEM (scanning electron microscope), and the result is shown in FIG. 7. FIG. 7 shows that the unmodified membrane surface is completely covered by accumulated flora and extracellular polymeric substances, and a dense biofilm is formed; the biomass on the surface of the modified membrane is obviously reduced, and the biological membrane is sparse and easy to peel off.
The embodiment of the invention provides a novel water treatment membrane modification method, which adopts a modifier prepared from a quorum sensing inhibitor to inhibit the adsorption growth of bacteria on the membrane surface and the formation of a biological membrane, improves the biological pollution resistance of the membrane material, and provides an environment-friendly new way for reducing the biological pollution in the application of membrane water treatment.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. A modification method for resisting biological pollution of a water treatment membrane material is characterized by comprising the following steps:
(1) adding a certain amount of film forming agent into a solvent, heating and stirring at a constant temperature to prepare a film forming agent solution;
(2) adding the quorum sensing inhibitor into the film forming agent solution according to a certain proportion, heating and stirring at a constant temperature to uniformly disperse the inhibitor in the solution, and preparing to obtain a modified solution;
(3) uniformly coating the modified solution containing the quorum sensing inhibitor on the surface of the membrane;
(4) and (3) drying the film with the coated surface in a constant-temperature heating device, wherein the film forming agent forms a film in the drying process and is adhered to the surface of the film, so that the modifier is fixed on the film.
2. The water treatment membrane material anti-biological pollution modification method as claimed in claim 1, wherein in the step (1), the film forming agent is one of sodium alginate, chitosan, polyvinyl alcohol, polydopamine, cellulose derivative or polyacrylamide; the solvent is one of water, dilute acid solution or dilute alkali solution, and the pH value is 3-11; in the film forming agent solution, the mass percentage concentration of the film forming agent is 0.01-10.0%.
3. The water treatment membrane material anti-biological pollution modification method as claimed in claim 2, wherein the mass percentage concentration of the film forming agent in the film forming agent solution is 0.1-1.0%.
4. The water treatment membrane material anti-biological pollution modification method as claimed in claim 1, wherein in the step (2), the quorum sensing inhibitor is one of curcumin, carvacrol, vanillin, furocoumarin, resveratrol, quercetin, naringenin, or furanone type compound, and modified homoserine lactone type compound, and the quorum sensing inhibitor is present in the modification solution at a concentration of 0.01-5.0% by mass.
5. The water treatment membrane material anti-biological contamination modification method as claimed in claim 4, wherein the mass percentage concentration of the quorum sensing inhibitor in the modification solution is 0.1-1.0%.
6. The water treatment membrane material anti-biological pollution modification method as claimed in claim 1, wherein, in the step (2), the heating temperature is 30-80 ℃; the heating time is 10min-24 h.
7. The water treatment membrane material anti-biological contamination modification method as claimed in claim 1, wherein in the step (3), the membrane comprises one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane; the coating thickness of the modifying solution is 0.01-5.0 mm.
8. The water treatment membrane material anti-biofouling modification method of claim 7, wherein the modification solution is applied at a thickness of 0.05-1.0 mm.
9. The water treatment membrane material anti-biological contamination modification method as claimed in claim 1, wherein in the step (4), the drying temperature is 30-80 ℃.
10. The water treatment membrane material anti-biological contamination modification method as claimed in claim 9, wherein in the step (4), the drying temperature is 40-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311590.6A CN114191999A (en) | 2021-11-08 | 2021-11-08 | Biological pollution resistance modification method for water treatment membrane material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311590.6A CN114191999A (en) | 2021-11-08 | 2021-11-08 | Biological pollution resistance modification method for water treatment membrane material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114191999A true CN114191999A (en) | 2022-03-18 |
Family
ID=80647059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111311590.6A Pending CN114191999A (en) | 2021-11-08 | 2021-11-08 | Biological pollution resistance modification method for water treatment membrane material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114191999A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116836459A (en) * | 2023-07-07 | 2023-10-03 | 安徽大学 | Qu@ beta-CD nanocomposite, preparation and application thereof as quorum sensing inhibitor |
| CN116903155A (en) * | 2023-09-13 | 2023-10-20 | 上海同济工程咨询有限公司 | Water quality improver, preparation method thereof and water maintenance method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492640A (en) * | 2016-11-18 | 2017-03-15 | 哈尔滨商业大学 | Based on the method that bioinformatics slows down membrane biological pollution |
| CN109046046A (en) * | 2018-08-24 | 2018-12-21 | 西安建筑科技大学 | A kind of preparation method of nano material/Quorum quenching enzymes hydrogel nanofiltration membrane |
| KR20190025221A (en) * | 2017-09-01 | 2019-03-11 | 주식회사 포스코건설 | Manufacturing method of water treatment filter media for biofilm prevention |
| CN110124541A (en) * | 2019-05-22 | 2019-08-16 | 北京师范大学 | A kind of stable against biological contamination composite membrane and preparation method thereof that quinolone signal molecule inhibitor is modified |
| CN111298651A (en) * | 2019-12-11 | 2020-06-19 | 恩泰环保科技（常州）有限公司 | Biological pollution resistant composite reverse osmosis membrane and preparation method thereof |
| KR20200114327A (en) * | 2019-03-28 | 2020-10-07 | 한양대학교 산학협력단 | Antimicrobial Spacer, Method for Manufacturing Same, and Reverse Osmosis Membrane Water Treatment Device Using Same |
| CN113413764A (en) * | 2021-06-24 | 2021-09-21 | 南京财经大学 | Modified membrane module, preparation method thereof and application thereof in filtration |
| CN113559727A (en) * | 2021-07-22 | 2021-10-29 | 中国乐凯集团有限公司 | Anti-biological pollution ultrafiltration membrane and preparation method thereof |
-
2021
- 2021-11-08 CN CN202111311590.6A patent/CN114191999A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492640A (en) * | 2016-11-18 | 2017-03-15 | 哈尔滨商业大学 | Based on the method that bioinformatics slows down membrane biological pollution |
| KR20190025221A (en) * | 2017-09-01 | 2019-03-11 | 주식회사 포스코건설 | Manufacturing method of water treatment filter media for biofilm prevention |
| CN109046046A (en) * | 2018-08-24 | 2018-12-21 | 西安建筑科技大学 | A kind of preparation method of nano material/Quorum quenching enzymes hydrogel nanofiltration membrane |
| KR20200114327A (en) * | 2019-03-28 | 2020-10-07 | 한양대학교 산학협력단 | Antimicrobial Spacer, Method for Manufacturing Same, and Reverse Osmosis Membrane Water Treatment Device Using Same |
| CN110124541A (en) * | 2019-05-22 | 2019-08-16 | 北京师范大学 | A kind of stable against biological contamination composite membrane and preparation method thereof that quinolone signal molecule inhibitor is modified |
| CN111298651A (en) * | 2019-12-11 | 2020-06-19 | 恩泰环保科技（常州）有限公司 | Biological pollution resistant composite reverse osmosis membrane and preparation method thereof |
| CN113413764A (en) * | 2021-06-24 | 2021-09-21 | 南京财经大学 | Modified membrane module, preparation method thereof and application thereof in filtration |
| CN113559727A (en) * | 2021-07-22 | 2021-10-29 | 中国乐凯集团有限公司 | Anti-biological pollution ultrafiltration membrane and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| KIBAEK LEE ET AL: ""Quorum sensing and quenching in membrane bioreactors: Opportunities and challenges for biofouling control"", BIORESOURCE TECHNOLOGY, vol. 270, 4 September 2018 (2018-09-04), pages 656 - 668, XP085511075, DOI: 10.1016/j.biortech.2018.09.019 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116836459A (en) * | 2023-07-07 | 2023-10-03 | 安徽大学 | Qu@ beta-CD nanocomposite, preparation and application thereof as quorum sensing inhibitor |
| CN116903155A (en) * | 2023-09-13 | 2023-10-20 | 上海同济工程咨询有限公司 | Water quality improver, preparation method thereof and water maintenance method |
| CN116903155B (en) * | 2023-09-13 | 2023-11-28 | 上海同济工程咨询有限公司 | Water quality improver, preparation method thereof and water maintenance method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114191999A (en) | Biological pollution resistance modification method for water treatment membrane material | |
| Nahm et al. | Application of quorum quenching bacteria entrapping sheets to enhance biofouling control in a membrane bioreactor with a hollow fiber module | |
| Meng et al. | Identification of activated sludge properties affecting membrane fouling in submerged membrane bioreactors | |
| Meng et al. | Effect of hydraulic retention time on membrane fouling and biomass characteristics in submerged membrane bioreactors | |
| Ghayeni et al. | Water reclamation from municipal wastewater using combined microfiltration-reverse osmosis (ME-RO): preliminary performance data and microbiological aspects of system operation | |
| CN107158957B (en) | Method for controlling membrane pollution by using quorum sensing quenching immobilized strains | |
| Li et al. | Biofouling behavior and performance of forward osmosis membranes with bioinspired surface modification in osmotic membrane bioreactor | |
| US10016729B2 (en) | Antibacterial and antifouling polymeric separation membrane and preparation method thereof | |
| Tong et al. | Biofilm formation of benthic diatoms on commercial polyvinylidene fluoride membrane | |
| Wang et al. | Effect of driving force on the performance of anaerobic osmotic membrane bioreactors: New insight into enhancing water flux of FO membrane via controlling driving force in a two-stage pattern | |
| CN110860216B (en) | Preparation process and preparation method of microporous inorganic filter membrane | |
| CN106955603B (en) | Surface segregation functionalized anti-pollution polymer separation membrane and preparation method thereof | |
| CN110124541B (en) | Quinolone signal molecule inhibitor modified anti-biological pollution composite membrane and preparation method thereof | |
| Xia et al. | Influence and mechanism of N-(3-oxooxtanoyl)-L-homoserine lactone (C8-oxo-HSL) on biofilm behaviors at early stage | |
| CN114904402B (en) | Layer-by-layer self-assembled slow-release antibacterial polymer separation membrane and preparation method and application thereof | |
| CN112426888A (en) | Modified ultrafiltration membrane for combined inhibition of membrane biological pollution and preparation method and application thereof | |
| Yang et al. | Biofilm formation and biofouling development on different ultrafiltration membranes by natural anaerobes from an anaerobic membrane bioreactor | |
| CN108339418A (en) | A kind of antibacterial composite reverse osmosis membrane and preparation method for efficient water process | |
| CN113171686A (en) | Preparation method of quaternary ammonium salt surface modified cellulose acetate reverse osmosis membrane | |
| CN113877427A (en) | Preparation method of antibacterial and anti-fouling regenerated cellulose composite ultrafiltration membrane, composite ultrafiltration membrane and application | |
| KR20200027381A (en) | The composition and preparation method of quorum quenching media of core-shell structure for anti-biofouling strategy | |
| WO2020183103A1 (en) | Method for producing microbial cellular biomass having flocculant properties | |
| CN114887494A (en) | Preparation method and application of metal ion leaching-free response release type MIL-53 modified membrane | |
| CN115957646A (en) | Preparation method of quorum sensing inhibitor modified membrane and application of quorum sensing inhibitor modified membrane in resisting biological pollution | |
| CN115245750A (en) | Preparation method of antibacterial ceramic membrane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |