CN110449033A - The cleaning method of ultrafiltration membrane surface organic sediment - Google Patents
The cleaning method of ultrafiltration membrane surface organic sediment Download PDFInfo
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- CN110449033A CN110449033A CN201910797789.0A CN201910797789A CN110449033A CN 110449033 A CN110449033 A CN 110449033A CN 201910797789 A CN201910797789 A CN 201910797789A CN 110449033 A CN110449033 A CN 110449033A
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- 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
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- 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
- B01D2321/168—Use of other chemical agents
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- 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
- B01D2321/20—By influencing the flow
- B01D2321/2066—Pulsated flow
- B01D2321/2075—Ultrasonic treatment
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- 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
- B01D2321/28—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by soaking or impregnating
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- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention proposes a kind of cleaning methods of ultrafiltration membrane surface organic sediment, by the way that Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum are obtained mixed bacteria after culture, ultrafiltration membrane being placed in mixed bacteria after impregnating can make the organic matter of ultrafiltration membrane surface degrade, experiment shows that the mixed bacteria reaches 94% or more to the organic matter clean rate of ultrafiltration membrane surface, simultaneously, synergistic effect is played between four kinds of bacteriums in the mixed bacteria, can further improve clean rate；Ultrafiltration membrane is placed in mixed bacteria after immersion, also cleaned using cleaning solution, cleaning solution is by the way that furfural phenol resin, Triafol T to be dissolved in acetone, during cleaning ultrafiltration membrane a tunic can be formed in ultrafiltration membrane surface, ultrafiltration membrane can be prevented further by organic pollution in this way, to improve the contamination resistance of ultrafiltration membrane；And ultrafiltration membrane is rinsed with given pace in cleaning, it can further improve the clean rate of ultrafiltration membrane in this way.
Description
Technical field
The present invention relates to ultrafiltration membrane technique field more particularly to a kind of cleaning methods of ultrafiltration membrane surface organic sediment.
Background technique
Ultrafiltration membrane must carry out periodic cleaning in use, to keep certain film permeation flux, and can extend film
Service life.Cleaning method generally determines according to the property of the property of ultrafiltration membrane and processing feed liquid, usually first with product water when cleaning
Power cleaning, is then according to circumstances cleaned using different cleaning solutions, and the selection of cleaning solution directly affects making for ultrafiltration membrane
Use the service life.Organic matter be easy to blocking ultrafiltration membrane lead to the ultrafiltration membrane lost of life, need to be replaced frequently, seriously affected produce into
Degree, causes production efficiency low.Currently, generally cleaned by the drug containing surfactant or highly basic, however this side
Formula cleaning organic matter is simultaneously not thorough.
Based on this, it is necessary to provide a kind of cleaning method that can thoroughly clean ultrafiltration membrane surface organic matter.
Summary of the invention
In view of this, the invention proposes a kind of cleaning methods of ultrafiltration membrane surface organic matter that clean rate is high.
The present invention provides a kind of cleaning methods of ultrafiltration membrane surface organic sediment, comprising the following steps:
Ultrafiltration membrane is placed in mixed bacteria and is impregnated；Wherein the mixed bacteria the preparation method comprises the following steps: by Pseudomonas putida,
Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum are cultivated up to mixed bacteria.
On the basis of above technical scheme, it is preferred that it further includes by ultrafiltration membrane that ultrafiltration membrane, which is placed in mixed bacteria after immersion,
It is cleaned using cleaning solution；The preparation method of the cleaning solution the following steps are included:
S1, furfural phenol resin, Triafol T are added in acetone solvent, are stirred；
S2, titanium dioxide is dissolved in silver ion salting liquid, after dispersion, by treated, titanium dioxide is added in S1
To get cleaning solution in solution.
It is further preferred that the mixed bacteria the preparation method comprises the following steps: by mass ratio be (2~3): (1~2): (1~3):
Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and the red spirillum of (3~4) are inoculated into culture solution after mixing and cultivate to obtain the final product
Mixed bacteria, wherein culture solution includes following parts by weight of component: 3~5 parts of beef extract, 5~10 parts of peptone, 5~10 parts
Glucose, 1~4 part of urea and 1~3 part of glucose.
On the basis of above technical scheme, it is preferred that by ultrafiltration membrane be placed in mixed bacteria and with stirring rate be 200~
5~10min is stirred under 500r/min.
It is further preferred that in S1 in temperature be 25~30 DEG C at 800~1000r/min rate stir 2~4h,
In, mass ratio 1:(0.5~1 of furfural phenol resin, Triafol T and acetone): (10~15).
It is further preferred that the titanium dioxide that partial size is 10~15nm is dissolved in silver ion salting liquid in S2, Yu Chao
Acoustic frequency is 20~30min of ultrasonic disperse under 50KHz, and wherein the mass ratio of titanium dioxide and silver ion salting liquid is 1:(20
~25).
It is further preferred that by treated, titanium dioxide is added in the solution in S1 in S2, with 600~800r/min speed
Rate stirs 1~2h up to cleaning solution.
It is further preferred that ultrafiltration membrane is cleaned using cleaning solution specifically: by cleaning solution with 5~10m3The rate of/min
20~30min of ultrafiltration membrane is rinsed, ultrafiltration membrane is then placed in 1~2h of immersion in cleaning solution again, finally by cleaning solution with 3~5m3/
The rate of min rinses 5~10min of ultrafiltration membrane.
It is further preferred that silver ion salting liquid includes silver nitrate solution and ammonium fluoride silver solution.
It is further preferred that by treated, titanium dioxide is added in the solution in S1 in S2, with 600 at 30~60 DEG C
~800r/min rate stirs 1~2h.
The cleaning method of ultrafiltration membrane surface organic sediment of the invention has the advantages that compared with the existing technology
(1) by the way that Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum are obtained Mixed Microbes after culture
Kind, the organic matter that ultrafiltration membrane is placed in mixed bacteria can be such that ultrafiltration membrane shows after impregnating is degraded, and the surface mixing is tested
Strain reaches 94% or more to the organic matter clean rate of ultrafiltration membrane surface, meanwhile, it is risen between four kinds of bacteriums in the mixed bacteria
To synergistic effect, clean rate can further improve；
(2) ultrafiltration membrane is placed in mixed bacteria impregnate after, also cleaned using cleaning solution, cleaning solution is by by phenol furfural tree
Rouge, Triafol T are dissolved in acetone, can be formed a tunic in ultrafiltration membrane surface during cleaning ultrafiltration membrane, can be prevented in this way
Only ultrafiltration membrane is further by organic pollution, to improve the contamination resistance of ultrafiltration membrane；Also contain dioxy in cleaning solution simultaneously
Change titanium, which passes through modified containing silver salt solution, and modified titanium dioxide is adhered to ultrafiltration membrane surface, not only can be into
The decomposition of one step catalyzing organic, while silver ion also acts as certain bactericidal effect；And it is rinsed in cleaning with given pace
Ultrafiltration membrane can further improve the clean rate of ultrafiltration membrane in this way, and can also reduce the water flux dough softening of ultrafiltration membrane, further
Improve the contamination resistance of ultrafiltration membrane.
Specific embodiment
Below in conjunction with embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only some embodiments of the invention, rather than whole embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
Embodiment 1
A kind of cleaning method of ultrafiltration membrane surface organic sediment, comprising the following steps:
A1, ultrafiltration membrane is placed in mixed bacteria and is to stir 5min under 200r/min with stirring rate；Wherein, the mixing
Strain the preparation method comprises the following steps: by mass ratio be 2:1:1:3 Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum
It is inoculated into culture solution and is cultivated up to mixed bacteria after mixing, wherein culture solution includes following parts by weight of component: 3 parts of beef
Cream, 5 parts of peptone, 5 parts of glucose, 1 part of urea and 1 part of glucose.
A2, by ultrafiltration membrane be placed in mixed bacteria impregnate after further include cleaning ultrafiltration membrane using cleaning solution；The cleaning
The preparation method of liquid the following steps are included:
S1, furfural phenol resin, Triafol T are added in acetone solvent, in temperature be 25 DEG C at 800r/
Min rate stirs 2h；Wherein, the mass ratio 1:0.5:10 of furfural phenol resin, Triafol T and acetone；
S2, by partial size be 10nm titanium dioxide be dissolved in silver nitrate solution, in supersonic frequency be 50KHz under ultrasonic disperse
20min, wherein the mass ratio of titanium dioxide and silver nitrate solution is 1:20；Silver nitrate-modified titanium dioxide is obtained after filtering,
Titanium dioxide is added in the solvent into S1 again, in the case where temperature is 30 DEG C, with 600r/min rate stirring 1h up to cleaning solution；
Wherein, ultrafiltration membrane is cleaned using cleaning solution in A2 specifically: by cleaning solution with 5m3The rate of/min rinses ultrafiltration
Ultrafiltration membrane, is then placed in cleaning solution again and impregnates 1h by film 20min, finally by cleaning solution with 3m3The rate of/min rinses ultrafiltration
Film 5min.
Embodiment 2
A kind of cleaning method of ultrafiltration membrane surface organic sediment, comprising the following steps:
A1, ultrafiltration membrane is placed in mixed bacteria and is to stir 8min under 350r/min with stirring rate；Wherein, the mixing
Strain the preparation method comprises the following steps: by mass ratio be 3:2:2:4 Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum
It is inoculated into culture solution and is cultivated up to mixed bacteria after mixing, wherein culture solution includes following parts by weight of component: 4 parts of beef
Cream, 7 parts of peptone, 8 parts of glucose, 2 parts of urea and 2 parts of glucose.
A2, by ultrafiltration membrane be placed in mixed bacteria impregnate after further include cleaning ultrafiltration membrane using cleaning solution；The cleaning
The preparation method of liquid the following steps are included:
S1, furfural phenol resin, Triafol T are added in acetone solvent, in temperature be 30 DEG C at 700r/
Min rate stirs 2h；Wherein, the mass ratio 1:0.8:12 of furfural phenol resin, Triafol T and acetone；
S2, by partial size be 10nm titanium dioxide be dissolved in silver nitrate solution, in supersonic frequency be 50KHz under ultrasonic disperse
25min, wherein the mass ratio of titanium dioxide and silver nitrate solution is 1:22；Silver nitrate-modified titanium dioxide is obtained after filtering,
Titanium dioxide is added in the solvent into S1 again, in the case where temperature is 30 DEG C, with 700r/min rate stirring 1h up to cleaning solution；
Wherein, ultrafiltration membrane is cleaned using cleaning solution in A2 specifically: by cleaning solution with 8m3The rate of/min rinses ultrafiltration
Ultrafiltration membrane, is then placed in cleaning solution again and impregnates 1h by film 25min, finally by cleaning solution with 4m3The rate of/min rinses ultrafiltration
Film 5min.
Embodiment 3
A kind of cleaning method of ultrafiltration membrane surface organic sediment, comprising the following steps:
A1, ultrafiltration membrane is placed in mixed bacteria and is to stir 10min under 500r/min with stirring rate；Wherein, described mixed
Combined bacteria kind the preparation method comprises the following steps: by mass ratio be 3:2:3:4 Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spiral shell
It is inoculated into culture solution and is cultivated up to mixed bacteria after bacterium mixing, wherein culture solution includes following parts by weight of component: 5 parts of ox
Meat extract, 10 parts of peptone, 10 parts of glucose, 4 parts of urea and 3 parts of glucose.
A2, by ultrafiltration membrane be placed in mixed bacteria impregnate after further include cleaning ultrafiltration membrane using cleaning solution；The cleaning
The preparation method of liquid the following steps are included:
S1, furfural phenol resin, Triafol T are added in acetone solvent, in temperature be 30 DEG C at 1000r/
Min rate stirs 4h；Wherein, the mass ratio 1:1:15 of furfural phenol resin, Triafol T and acetone；
S2, by partial size be 15nm titanium dioxide be dissolved in silver nitrate solution, in supersonic frequency be 50KHz under ultrasonic disperse
30min, wherein the mass ratio of titanium dioxide and silver nitrate solution is 1:25；Silver nitrate-modified titanium dioxide is obtained after filtering,
Titanium dioxide is added in the solvent into S1 again, in the case where temperature is 30 DEG C, with 800r/min rate stirring 1h up to cleaning solution；
Wherein, ultrafiltration membrane is cleaned using cleaning solution in A2 specifically: by cleaning solution with 10m3The rate of/min is rinsed super
Ultrafiltration membrane, is then placed in cleaning solution again and impregnates 2h by filter membrane 30min, finally by cleaning solution with 5m3The rate of/min is rinsed super
Filter membrane 10min.
Comparative example 1
A kind of cleaning method of ultrafiltration membrane surface organic sediment, comprising the following steps:
A1, ultrafiltration membrane is placed in mixed bacteria and is to stir 5min under 200r/min with stirring rate；Wherein, the mixing
Strain the preparation method comprises the following steps: by mass ratio be 2:1:1:3 Pseudomonas putida, Si Shi bacillus, firefly air exhaustion hair bacillus and red spirillum
It is inoculated into culture solution and is cultivated up to mixed bacteria after mixing, wherein culture solution includes following parts by weight of component: 3 parts of beef
Cream, 5 parts of peptone, 5 parts of glucose, 1 part of urea and 1 part of glucose.
Comparative example 2
A kind of cleaning method of ultrafiltration membrane surface organic sediment, comprising the following steps:
A1, ultrafiltration membrane is placed in mixed bacteria and is to stir 5min under 200r/min with stirring rate；Wherein, the mixing
Strain the preparation method comprises the following steps: being to be inoculated into culture solution culture after the Pseudomonas putida of 2:1, Si Shi bacillus mix i.e. by mass ratio
Mixed bacteria, wherein culture solution includes following parts by weight of component: 3 parts of beef extract, 5 parts of peptone, 5 parts of glucose,
1 part of urea and 1 part of glucose.
Ultrafiltration membrane is cleaned according to the method for Examples 1 to 3, comparative example 1~2, detects different cleaning methods respectively
To the clean rate of organic matter, experimental result is as shown in table 1 below.
Clean rate of the table 1- difference cleaning method to organic matter
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | |
| Clean rate (%) | 94.6 | 95.3 | 96.2 | 88.6 | 84.3 |
It, can be to ultrafiltration membrane table by upper table 1 it is found that cleaning method of the invention reaches 94% or more to the clean rate of organic matter
The organic matter in face is thoroughly cleaned.
It is in pressure according to film properties evaluation method by the ultrafiltration membrane after above-described embodiment 1~3, the cleaning of comparative example 1~2
0.1MPa, temperature are to test the initial water flux of ultrafiltration membrane and the water flux after continuous use 15 days respectively, as a result such as at 25 DEG C
Shown in the following table 1.
The water flux of table 2- difference ultrafiltration membrane changes
| Initial water flux (L/m2·h) | Water flux (L/m after 15 days2·h) | |
| Embodiment 1 | 1023 | 796 |
| Embodiment 2 | 996 | 782 |
| Embodiment 3 | 1105 | 889 |
| Comparative example 1 | 1086 | 726 |
| Comparative example 2 | 983 | 704 |
By upper table 2 it is found that after the cleaning of the cleaning method by the embodiment of the present invention 1~3, the water flux attenuation of ultrafiltration membrane
Less than the attenuation of comparative example 1~2, illustrate that ultrafiltration membrane has good contamination resistance after cleaning method of the invention.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cleaning method of ultrafiltration membrane surface organic sediment, it is characterised in that: the following steps are included:
Ultrafiltration membrane is placed in mixed bacteria and is impregnated；Wherein the mixed bacteria the preparation method comprises the following steps: by Pseudomonas putida, Si Shi
Bacillus, firefly air exhaustion hair bacillus and red spirillum are cultivated up to mixed bacteria.
2. the cleaning method of ultrafiltration membrane surface organic sediment as described in claim 1, it is characterised in that: ultrafiltration membrane is placed in mixed
It further include cleaning ultrafiltration membrane using cleaning solution after being impregnated in combined bacteria kind；The preparation method of the cleaning solution the following steps are included:
S1, furfural phenol resin, Triafol T are added in acetone solvent, are stirred；
S2, titanium dioxide is dissolved in silver ion salting liquid, after dispersion, by treated, the solution in S1 is added in titanium dioxide
In to get cleaning solution.
3. the cleaning method of ultrafiltration membrane surface organic sediment as described in claim 1, it is characterised in that: the mixed bacteria
The preparation method comprises the following steps: by mass ratio be (2~3): (1~2): (1~3): Pseudomonas putida, Si Shi bacillus, the firefly gas of (3~4)
It is inoculated into culture solution and is cultivated up to mixed bacteria after pole hair bacillus and the mixing of red spirillum, wherein culture solution includes following weight
Part component: 3~5 parts of beef extract, 5~10 parts of peptone, 5~10 parts of glucose, 1~4 part of urea and 1~3 part
Glucose.
4. the cleaning method of ultrafiltration membrane surface organic sediment as described in claim 1, it is characterised in that: ultrafiltration membrane to be placed in
Mixed bacteria and with stirring rate be 200~500r/min under stir 5~10min.
5. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 2, it is characterised in that: be in temperature in S1
2~4h is stirred with 800~1000r/min rate at 25~30 DEG C, wherein furfural phenol resin, Triafol T and acetone
Mass ratio 1:(0.5~1): (10~15).
6. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 2, it is characterised in that: be by partial size in S2
The titanium dioxide of 10~15nm is dissolved in silver ion salting liquid, in supersonic frequency be 50KHz under 20~30min of ultrasonic disperse,
Wherein the mass ratio of titanium dioxide and silver ion salting liquid is 1:(20~25).
7. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 2, it is characterised in that: after being handled in S2
Titanium dioxide be added S1 in solution in, with 600~800r/min rate stir 1~2h up to cleaning solution.
8. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 2, it is characterised in that: use ultrafiltration membrane
Cleaning solution cleaning specifically: by cleaning solution with 5~10m3The rate of/min rinses 20~30min of ultrafiltration membrane, then again by ultrafiltration
Film is placed in 1~2h of immersion in cleaning solution, finally by cleaning solution with 3~5m3The rate of/min rinses 5~10min of ultrafiltration membrane.
9. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 2, it is characterised in that: silver ion salt is molten
Liquid includes silver nitrate solution and ammonium fluoride silver solution.
10. the cleaning method of ultrafiltration membrane surface organic sediment as claimed in claim 7, it is characterised in that: will processing in S2
Titanium dioxide afterwards is added in the solution in S1, stirs 1~2h at 30~60 DEG C with 600~800r/min rate.
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Application publication date: 20191115 |
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