CN105013329A - Method for characterizing membrane pollution of ultrafiltration membrane - Google Patents
Method for characterizing membrane pollution of ultrafiltration membrane Download PDFInfo
- Publication number
- CN105013329A CN105013329A CN201510394992.5A CN201510394992A CN105013329A CN 105013329 A CN105013329 A CN 105013329A CN 201510394992 A CN201510394992 A CN 201510394992A CN 105013329 A CN105013329 A CN 105013329A
- Authority
- CN
- China
- Prior art keywords
- value
- membrane
- water sample
- milipore filter
- fouling membrane
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for characterizing membrane pollution of an ultrafiltration membrane and belongs to the technical field of water treatment. The method comprises: firstly taking a water sample which is to be filtered by the ultrafiltration membrane; after the water sample is filtered by the ultrafiltration membrane, adjusting the pH value of the water sample to 7.4-7.6; then measuring the DOC value of total dissolved organic matters in the water sample by using a TOC analyzer; measuring the UV254 value of the water sample by using a ultraviolet visible spectrometer; calculating the SUVA value according to the DOC value and the UV254 value; and comparing the relationship between the SUVA value and the critical value of membrane pollution so as to determine whether the water quality condition of the water sample is suitable for being filtered by the ultrafiltration membrane or not. The method disclosed by the invention is relatively simple to operate and investment-saving and time-saving, and meanwhile can be used for guiding a purification effect on the organic matters by a pre-treatment technology in a targeted manner.
Description
Technical field
The present invention relates to water-treatment technology field, specifically, relate to a kind of method characterizing milipore filter fouling membrane.
Background technology
In recent years, along with going from bad to worse and the progressively raising of drinking water quality sanitary standard of raw water quality, emerge diversified drinking water treatment technology, in numerous water treatment technology, ultrafiltration technology do not need to add chemical agent because having, remove the scope polluted wide, reliable, be easy to realize the advantages such as control automatically, becoming perfect conventional handling technology of water supply has one of prospect technique most.Hyperfiltration technique is called as " third generation drinking water treatment technology ", along with the application of ultrafiltration technology in drinking water treatment field, ultrafiltration technology runs into some technical barriers in drinking water treatment process, and wherein, fouling membrane is the difficult problem maximum in drinking water treatment process of ultrafiltration technology.The current research to milipore filter fouling membrane mainly measures the change of the transmembrane pressure of its filter process and is carry out with directions such as membrane flux signs after organic total amount level, operation, but, mensuration total amount organic levels can not be explained accurately and cause the organic character of fouling membrane, causes the pretreating process developed not have specific aim effect.The transmembrane pressure etc. of membrane flux, membrane filtration could determine the impact of water sample condition of water quality on fouling membrane after needing to run milipore filter technique, has hysteresis quality and characterizes comparatively macroscopic view, inherently can not explain the reason of milipore filter fouling membrane.
Show to cause the main reason of fouling membrane to be due to organic matter from existing result of study, but the fouling membrane impact on milipore filter of organic kind, hydrophilic, hydrophobic property and organic polarity is all different, therefore, develop a kind of novel milipore filter fouling membrane characterizing method and evaluate the main organic matter causing fouling membrane, run significant for the efficient stable of milipore filter technique in drinking water treatment field.
Summary of the invention
In view of this, the object of this invention is to provide a kind of method characterizing milipore filter fouling membrane, the method utilizes the UV measuring water sample before film
254the impact of value and DOC value comprehensive analysis water-like Organic Compound confrontation ultrafiltration membrance filter process, studies its correlation, and then characterization of membrane pollution condition.Testing index is few and simple to operate, safe and reliable.
Technical scheme of the present invention is as follows:
A kind of method characterizing milipore filter fouling membrane, first get the water sample intending adopting ultrafiltration membrance filter, after water sample filter membrane, the pH value regulating water sample is 7.4 ~ 7.6, then measure total dissolved organic matter DOC value of water sample with TOC instrument, measure the UV of water sample with ultraviolet-visible spectrometer
254value, according to DOC value and UV
254value calculates SUVA value, compares the relation between SUVA value and fouling membrane critical value, and then determines whether the condition of water quality of water sample is applicable to adopting ultrafiltration membrance filter.
Preferably, the aperture of described filter membrane is 0.4 ~ 0.5 μm.
More preferably, the aperture of described filter membrane is 0.45 μm.
Preferably, the pH value of described water sample adopts hydrochloric acid and NaOH to regulate.
More preferably, the concentration of described hydrochloric acid is 0.05 ~ 0.15mol/L.
More preferably, the concentration of described NaOH is 0.05 ~ 0.15mol/L.
Described fouling membrane critical value is SUVA value=2.
When SUVA value >=2, the transmembrane pressure of milipore filter increases fast, and fouling membrane is serious, and producing water ratio is low; As SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running.
The total amount level of what described DOC characterized is dissolved organic matter in water body.
Described UV
254what characterize is large molecular hydrophobicity organic matter.
Described SUVA value is ultraviolet absorptivity.
Under the condition that organic concentration is basically identical, UV
254value there are differences, this species diversity is mainly reflected in the hydrophilic and hydrophobic in water sample, research shows, when SUVA value is greater than 4, based on hydrophobic organic compound in water, when SUVA value is less than 2, hydrophilic organics hydrophilicity ratio will more than 80%, this shows to there is certain correlation between hydrophilic and hydrophobic organic matter ratio in SUVA value and water, and UV
254the organic matter that the molecular weight characterized is larger, what DOC characterized is the overall of dissolved organic matter in water body, for the invention provides scientific basis, utilizes SUVA value (UV absorption luminosity) can express fouling membrane degree accurately, when under the condition that total dissolved organic matter concentration is consistent, UV
254the large molecular hydrophobicity organic matter characterized is larger, and SUVA value is larger, shows that fouling membrane degree will be larger.
Beneficial effect of the present invention is: the present invention's operation is comparatively simple, only need measure the total organic matter concentration DOC in water sample and UV
254calculate SUVA value after value, compare the relation between SUVA value and critical value, determine fouling membrane situation.Operation of the present invention can all complete in laboratory, has high operability.The proposition of fouling membrane evaluation index critical value, only needs simply to measure the DOC value into film water matter and UV
254value, just evaluating water quality whether can accurately be applicable to milipore filter PROCESS FOR TREATMENT, if be not suitable for milipore filter technique, after then increasing preconditioning technique, again measure the required index detecting water sample, not needing so completely to investigate the whether applicable milipore filter PROCESS FOR TREATMENT of water sample by running film component device, reducing investment outlay and the time, preconditioning technique can also be instructed targetedly to organic clean-up effect simultaneously.
Accompanying drawing explanation
Fig. 1 is the transmembrane pressure variation diagram of the different water sample of SUVA value in test example.
Detailed description of the invention
Conveniently those skilled in the art will recognize that the present invention will be further described below in conjunction with embodiment.Embodiment is only illustrating this invention, is not limitation of the invention, and the step not doing in embodiment to illustrate is all prior arts, is not described in detail at this.
Embodiment one
A kind of method characterizing milipore filter fouling membrane, first get the water sample 1L intending adopting ultrafiltration membrance filter, water sample being crossed aperture is after the filter membrane of 0.4 μm, concentration is adopted to be the hydrochloric acid of 0.05mol/L and concentration to be the NaOH of 0.05 to regulate the pH value of water sample to be 7.4, then measure total dissolved organic matter DOC value of water sample with TOC instrument, measure the UV of water sample with ultraviolet-visible spectrometer
254value, according to DOC value and UV
254value calculates SUVA value, compares the relation between SUVA value and fouling membrane critical value, and then determines whether the condition of water quality of water sample is applicable to adopting ultrafiltration membrance filter.
The total amount level of what described DOC characterized is dissolved organic matter in water body.
Described UV
254what characterize is large molecular hydrophobicity organic matter.
Described fouling membrane critical value is SUVA value=2, when SUVA value >=2, the transmembrane pressure of milipore filter increases fast, fouling membrane is serious, and producing water ratio is low, and namely this tested water body is not suitable for adopting ultrafiltration membrance filter, after first water body must being carried out pretreatment, detect again, until the SUVA value < 2 of tested water body, using ultrafiltration membrane filtration; As SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running, shows that this water body is applicable to adopting ultrafiltration membrance filter.
Embodiment two
A kind of method characterizing milipore filter fouling membrane, first get the water sample 1L intending adopting ultrafiltration membrance filter, water sample being crossed aperture is after the filter membrane of 0.5 μm, concentration is adopted to be the hydrochloric acid of 0.15mol/L and concentration to be the NaOH of 0.15mol/L to regulate the pH value of water sample to be 7.6, then measure total dissolved organic matter DOC value of water sample with TOC instrument, measure the UV of water sample with ultraviolet-visible spectrometer
254value, according to DOC value and UV
254value calculates SUVA value, compares the relation between SUVA value and fouling membrane critical value, and then determines whether the condition of water quality of water sample is applicable to adopting ultrafiltration membrance filter.
The total amount level of what described DOC characterized is dissolved organic matter in water body.
Described UV
254what characterize is large molecular hydrophobicity organic matter.
Described fouling membrane critical value is SUVA value=2, when SUVA value >=2, the transmembrane pressure of milipore filter increases fast, fouling membrane is serious, and producing water ratio is low, and namely this tested water body is not suitable for adopting ultrafiltration membrance filter, after first water body must being carried out pretreatment, detect again, until the SUVA value < 2 of tested water body, using ultrafiltration membrane filtration; As SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running, shows that this water body is applicable to adopting ultrafiltration membrance filter.
Embodiment three
A kind of method characterizing milipore filter fouling membrane, first get the water sample 1L intending adopting ultrafiltration membrance filter, water sample being crossed aperture is after the filter membrane of 0.45 μm, concentration is adopted to be the hydrochloric acid of 0.1mol/L and concentration to be the NaOH of 0.1mol/L to regulate the pH value of water sample to be 7.5, then measure total dissolved organic matter DOC value of water sample with TOC instrument, measure the UV of water sample with ultraviolet-visible spectrometer
254value, according to DOC value and UV
254value calculates SUVA value, compares the relation between SUVA value and fouling membrane critical value, and then determines whether the condition of water quality of water sample is applicable to adopting ultrafiltration membrance filter.
The total amount level of what described DOC characterized is dissolved organic matter in water body.
Described UV
254what characterize is large molecular hydrophobicity organic matter.
Described fouling membrane critical value is SUVA value=2, when SUVA value >=2, the transmembrane pressure of milipore filter increases fast, fouling membrane is serious, and producing water ratio is low, and namely this tested water body is not suitable for adopting ultrafiltration membrance filter, after first water body must being carried out pretreatment, detect again, until the SUVA value < 2 of tested water body, using ultrafiltration membrane filtration; As SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running, shows that this water body is applicable to adopting ultrafiltration membrance filter.
Test effect of the present invention is verified below with test:
Test example
The water sample of the water quality character that the 6 groups of concentration chosen are different is tested, and the water quality situation of water sample is as shown in table 1.
Table 1
6 groups of water samples cross the transmembrane pressure (TMP) of 6 groups of new film membrane modules as shown in Figure 1 respectively.As can be seen from Fig. 1, when SUVA value >=2, the transmembrane pressure of milipore filter increases fast, and fouling membrane is serious, and producing water ratio is low, and as SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running.This result of the test shows that SUVA value=2 are the critical value of milipore filter fouling membrane.
In order to determine science and the accuracy of this value further, utilize the accuracy that the cake layer modelling verification after ultrafiltration membrance filter is tested.
Milipore filter filter cake blocking filtering model is the common model of evaluated for film polluting property, namely utilize under the SUVA value condition of variable concentrations in water sample with filter water sample after the correlation of the cake layer resistance coefficient of model calculation formula that utilizes check the critical value of fouling membrane.
Utilize the computing formula of cake layer model:
J
pp
t/ (R
t), R
tr
mr
c, R
ca
cv
pc
p/ A, finally obtains Ap
t/ (J
p) AR
ma
cc
pv
p, in formula: a
cc
pbe cake layer resistance coefficient, in test, measure R
m, A, p
tand J
pvalue, obtains a
cc
pvalue.
In formula: the coefficient of viscosity representing water; p
trepresent ultrafiltration membrance filter pressure; R
trepresent ultrafiltration membrance filter drag overall.Result of the test is as shown in table 2.
Table 2
Shown by the test data of table 2, when SUVA value≤2, cake layer resistance coefficient maintains about 1, and as SUVA value > 2, cake layer resistance coefficient increases very fast, and result of the test is consistent with the result of the test of transmembrane pressure.
The present invention mainly utilize SUVA value to judge water sample water quality crosses a kind of method of the impact of milipore filter fouling membrane, its principle is, under the condition that organic concentration is basically identical, UV
254value there are differences, this species diversity is mainly reflected in the hydrophilic and hydrophobic in water sample, because the carbon-nitrogen ratio (ratio of C, atom N number) of humic acid is between 9 ~ 15, the C/N of rich power acid is between 8 ~ 13, the aromaticity of humic acid is higher than fulvic acid, also comparatively strong to UV absorption effect, the organic matter SUVA value that this just causes humic acid ratio high is higher.In water sample, humic acid concentration is higher simultaneously, hydrophobic organic compound concentration will be higher, molecular mass is large, crinkle degree is large and the lipid structure contained is many humic acid shows hydrophobicity, and fulvic acid molecule quality is less and containing more hydrophilic functional groups, when SUVA value is greater than 4, based on hydrophobic organic compound in water, when SUVA value is less than 2, hydrophilic organics hydrophilicity ratio will more than 80%, this shows to there is certain correlation between hydrophilic and hydrophobic organic matter ratio in SUVA value and water, existing most of result of study shows that in water body, large molecular hydrophobicity organic matter is the main cause causing fouling membrane, and UV
254namely the organic matter characterized is the organic matter that molecular weight is larger, what DOC characterized is the overall of dissolved organic matter in water body, this is just for the invention provides scientific basis, utilize SUVA value (UV absorption luminosity) fouling membrane degree can be expressed accurately, when under the condition that total dissolved organic matter concentration is consistent, UV
254the large molecular hydrophobicity organic matter characterized is larger, and SUVA value shows that more greatly fouling membrane degree will be larger.
The above, it is only better example of the present invention, not any pro forma restriction is done to the present invention, anyly do not depart from technical solution of the present invention content, the any simple modification done above example according to technical spirit of the present invention, coversion material equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. one kind characterizes the method for milipore filter fouling membrane, it is characterized in that: first get the water sample intending adopting ultrafiltration membrance filter, after water sample filter membrane, the pH value regulating water sample is 7.4 ~ 7.6, then measure total dissolved organic matter DOC value of water sample with TOC instrument, measure the UV of water sample with ultraviolet-visible spectrometer
254value, according to DOC value and UV
254value calculates SUVA value, compares the relation between SUVA value and fouling membrane critical value, and then determines whether the condition of water quality of water sample is applicable to adopting ultrafiltration membrance filter.
2. the method characterizing milipore filter fouling membrane as claimed in claim 1, is characterized in that: the aperture of described filter membrane is 0.4 ~ 0.5 μm.
3. the method characterizing milipore filter fouling membrane as claimed in claim 1 or 2, is characterized in that: the aperture of described filter membrane is 0.45 μm.
4. the method characterizing milipore filter fouling membrane as claimed in claim 1, is characterized in that: the pH value of described water sample adopts hydrochloric acid and NaOH to regulate.
5. the method characterizing milipore filter fouling membrane as claimed in claim 4, is characterized in that: the concentration of described hydrochloric acid is 0.05 ~ 0.15mol/L.
6. the method characterizing milipore filter fouling membrane as claimed in claim 4, is characterized in that: the concentration of described NaOH is 0.05 ~ 0.15mol/L.
7. the method characterizing milipore filter fouling membrane as claimed in claim 1, is characterized in that: described fouling membrane critical value is SUVA value=2.
8. the method for the sign milipore filter fouling membrane as described in claim 1 or 7, is characterized in that: when SUVA value >=2, and the transmembrane pressure of milipore filter increases fast, and fouling membrane is serious, and producing water ratio is low; As SUVA value < 2, the transmembrane pressure of milipore filter increases slowly, milipore filter even running.
9. the as claimed in claim 1 method characterizing milipore filter fouling membrane, is characterized in that: the total amount level of what described DOC characterized is dissolved organic matter in water body.
10. the method characterizing milipore filter fouling membrane as claimed in claim 1, is characterized in that: described UV
254what characterize is large molecular hydrophobicity organic matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510394992.5A CN105013329A (en) | 2015-07-07 | 2015-07-07 | Method for characterizing membrane pollution of ultrafiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510394992.5A CN105013329A (en) | 2015-07-07 | 2015-07-07 | Method for characterizing membrane pollution of ultrafiltration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105013329A true CN105013329A (en) | 2015-11-04 |
Family
ID=54403845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510394992.5A Pending CN105013329A (en) | 2015-07-07 | 2015-07-07 | Method for characterizing membrane pollution of ultrafiltration membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105013329A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367476A (en) * | 2016-05-13 | 2017-11-21 | 通用电气公司 | Assess method and system and its application in water process of the biodegradability of water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040018583A1 (en) * | 2002-07-23 | 2004-01-29 | Ho Bosco P. | Method of monitoring biofouling in membrane separation systems |
| CN101259380A (en) * | 2007-03-06 | 2008-09-10 | 中芯国际集成电路制造(上海)有限公司 | Testing device for measuring SDI15 value and testing method thereof |
| CN102463037A (en) * | 2010-11-10 | 2012-05-23 | 东丽纤维研究所（中国）有限公司 | Method for evaluating polluting property of filtered liquid |
-
2015
- 2015-07-07 CN CN201510394992.5A patent/CN105013329A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040018583A1 (en) * | 2002-07-23 | 2004-01-29 | Ho Bosco P. | Method of monitoring biofouling in membrane separation systems |
| CN101259380A (en) * | 2007-03-06 | 2008-09-10 | 中芯国际集成电路制造(上海)有限公司 | Testing device for measuring SDI15 value and testing method thereof |
| CN102463037A (en) * | 2010-11-10 | 2012-05-23 | 东丽纤维研究所（中国）有限公司 | Method for evaluating polluting property of filtered liquid |
Non-Patent Citations (1)
| Title |
|---|
| 陈卫: "SUVA值与超滤膜污染的关系", 《华中科技大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367476A (en) * | 2016-05-13 | 2017-11-21 | 通用电气公司 | Assess method and system and its application in water process of the biodegradability of water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhou et al. | Using UV–vis absorbance spectral parameters to characterize the fouling propensity of humic substances during ultrafiltration | |
| Yu et al. | Comparison of PARAFAC components of fluorescent dissolved and particular organic matter from two urbanized rivers | |
| Albrektienė et al. | Determination of organic matter by UV absorption in the ground water | |
| CN111413329B (en) | Biological acute toxicity detection method applied to detection of pollutants and actual water sample | |
| CN107478734A (en) | The chromatography of ions detection method of sulfate radical and inferior sulfate radical is determined in a kind of desulfurization seawater simultaneously | |
| CN104297189B (en) | A kind of measure the method for soluble organic nitrogen concentration in secondary effluent | |
| CN107703134B (en) | Kit and method for detecting ammonia nitrogen content in water body and application | |
| Myat et al. | Characterisation of organic matter in IX and PACl treated wastewater in relation to the fouling of a hydrophobic polypropylene membrane | |
| Xin et al. | Using EEM fluorescence to characterize the membrane integrity of membrane bioreactor (MBR) | |
| CN104406943A (en) | Pretreatment method for liquid sample in laser-induced breakdown spectrum detection technology | |
| Wei et al. | Impact of origin and structure on the aggregation behavior of natural organic matter | |
| CN106442448B (en) | A kind of method of quick detection sulphion | |
| CN105013329A (en) | Method for characterizing membrane pollution of ultrafiltration membrane | |
| KR102359468B1 (en) | Improve Total Organic Carbon Analysis Method with pretreatment and homogeneity evaluation of Sample | |
| CN106124283B (en) | Polymer concentration determines the method for nitrogen detection disturbing factor in a kind of removal Produced Liquid | |
| CN113049577A (en) | Copper ion detection kit based on polyether sulfone material and detection method | |
| CN102944551A (en) | Detection method of Cd2+ | |
| Dyke et al. | Removal of organics from offshore produced waters using nanofiltration membrane technology | |
| CN106591424A (en) | Method for testing biotoxicity of oil production wastewater by using Selenastrum capricornutum | |
| CN107219102A (en) | A kind of method of soluble organic nitrogen concentration in superposition of electric field pretreatment mode direct measurement water body based on dialysis | |
| Potvin et al. | Interference by the activated sludge matrix on the analysis of soluble microbial products in wastewater | |
| CN104977267A (en) | Method for analyzing flocculation-ultrafiltration membrane pollution state and using amount of flocculating agent | |
| Liu et al. | Pressure-driven membrane desalination | |
| CN103776789B (en) | A kind of types of unknown pollutants method for early warning based on uv-vis spectra | |
| Bergman et al. | Fluorescence characterization of organic matter and fouling: Case study in a full‐scale reverse osmosis membrane treatment plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151104 |