CN105293767A - Method for treating printing and dyeing wastewater through integrated membrane separation technology - Google Patents
Method for treating printing and dyeing wastewater through integrated membrane separation technology Download PDFInfo
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- CN105293767A CN105293767A CN201510708698.7A CN201510708698A CN105293767A CN 105293767 A CN105293767 A CN 105293767A CN 201510708698 A CN201510708698 A CN 201510708698A CN 105293767 A CN105293767 A CN 105293767A
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Abstract
The invention belongs to the technical field of environmental protection, and discloses a method for treating printing and dyeing wastewater through an integrated membrane separation technology. A pretreatment system, an ultrafiltration (UF) system, a reverse osmosis (RO) system and a cleaning system are involved in the method, wherein the UF system and the RO system are the key of the method. The method has the advantages of being high in separation efficiency, capable of saving energy, free of pollution, simple in technology and convenient to implement, enabling the process to be easily controlled and the like, shows a good effect in the process of treating and recycling printing and dyeing wastewater, has specific advantages compared with an existing single membrane technology for treating printing and dyeing wastewater, can meet wastewater treatment requirements and reduce membrane pollution, and is an effective wastewater treatment scheme; the advanced wastewater treatment technology capable of achieving various recycling purposes is formed; the method has great development potential in advanced treatment and recycling of printing and dyeing wastewater and has good application prospects.
Description
Technical field
The invention belongs to environmental protection technical field, be specifically related to a kind of method utilizing Integrated Films isolation technique treatment of dyeing and printing.
Background technology
Dyeing waste water has that the water yield is large, organic pollutant content is high, alkalescence is large, change of water quality is large, complicated component, colourity are high, toxic substance is many and the feature such as serious environment pollution, is the Focal point and difficult point of waste water treatment technical study always.The particularly development of chemical & blended fabric in recent years and the progress of finishing process in printing and dye-ing technology, new dye kind occurs in a large number, and molecular structure is complicated and stable, considerably increases wastewater treatment difficulty.Because dyeing waste water is difficult, the advanced treatment of dyeing waste water causes the attention that people are very large always.Original technique comprises preprocessing part, biological treatment part and sludge treatment part, mainly there is following shortcoming: in the place of excess sludge costly; Single utilization biological process can not meet the needs of practice; Sometimes need the pre-treatment adding one raising wastewater biodegradability in its front end, improve investment and running cost.The appearance of novel film materials and membrane separation technique makes the process of dyeing waste water have a good solution, membrane separation technique is high owing to having separation efficiency, saving power and preventing pollution contaminates, technique is simple, easy to operate, the advantages such as process is easy to control, integrated membrane process is used ultrafiltration (UF) and the combine with technique such as reverse osmosis (RO) or nanofiltration (NF), Integrated Films sepn process not only can reach the processing requirements to sewage, and the pollution of film can be alleviated, it is a kind of effective sewage disposal scheme, formation can meet the wastewater deep treatment process of various recycling object, advanced treatment and reuse of dyeing waste water has very large development potentiality.
Summary of the invention
The object of the invention is to solve the shortcoming of prior art, provide that a kind of operating process is simple, expense cheap, need not complex apparatus and the method for the treatment of dyeing and printing efficiently of environmentally friendly property.
A kind of method of Integrated Films isolation technique treatment of dyeing and printing, the method is by pretreatment system, ultrafiltration (UF) system, reverse osmosis (RO) system and cleaning system 4 part composition, wherein ultrafiltration system and reverse osmosis system are the keys of the method.
The concrete treatment process of the present invention is: because dyeing waste water is generally more containing suspended substance (comprising inorganic and organic), broken fibrous suspended substance very easily blocks micro-filtration and thinner film, so first will flocculate to dyeing waste water and the conventional pre-treatment such as air supporting the pH value hydrochloric acid of waste water or sodium hydroxide are adjusted to 7 ~ 8; By again under the effect of hydraulic pressure by water molecules and small-molecule substance etc. through ultra-filtration membrane, suspended particulates in water, colloid, microorganism etc. are then trapped within the internal surface of ultra-filtration membrane, can be removed the materials such as the suspended particulates in waste water, colloid, microorganism by UF ultra-filtration membrane; Again waste water is squeezed into by high-pressure pump in the water tank that RO film is housed, due to the nano level aperture of RO film, the impurity such as the inorganic salt in waste water, heavy metal ion, organism, colloid, bacterium, virus cannot through RO film, and water molecules can be through, impurity in waste water and salt can be separated with water by RO film, obtain purer water.Due at ultra-filtration membrane and reverse osmosis membrane in use, the impact of various factors, inevitably have scale formation or contaminated, the function of cleaning system is exactly when scale formation or contaminated and cause degradation appears in ultra-filtration membrane and reverse osmosis membrane, corresponding chemical medicine just must be according to circumstances adopted to carry out clean, timing carries out low-pressure washing to film, the deposition on film surface is washed away, and makes film recover normal.
Advantage of the present invention and effect are:
Present method has the advantages such as separation efficiency is high, saving power and preventing pollution dye, technique is simple, easy to operate, process is easy to control, good effect is shown in treatment of dyeing wastewater reuse, single membrane technique treatment of dyeing and printing more in the past has distinctive advantage, the high cleanup standard of dyeing waste water can be realized, not only process dyeing waste water efficiently, and effectively reduce the energy consumption in treating processes.
Accompanying drawing explanation
For allowing preparation process of the present invention become apparent, the description of the drawings is as follows:
Fig. 1 illustrates a kind of preparation flow figure according to an embodiment of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
Get 1L dyeing waste water sample, first waste water is left standstill, removing upper strata floating matter and seabed sediment, then add flocculation agent, make the material flocculation removings such as fiber wherein and the pH value hydrochloric acid of waste water or sodium hydroxide are adjusted to 7 ~ 8; Again pretreated water liquid is passed through ultra-filtration membrane, the removing impurity such as suspended particulates, colloid, microorganism wherein, obtains the water sample clarified; Finally again water liquid high pressure is squeezed into the small-sized water tank containing RO film, the impurity such as the inorganic salt in water, heavy metal ion, organism, colloid, bacterium, virus are retained removing, the water obtained reaches national grade one discharge standard, and calculates its clearance, specifically in table 1.
Water quality situation after table 1 wastewater sample and embrane method process
| Project | pH | Specific conductivity/μ Scm -1 | COD/mg·L -1 | Turbidity/NTU | Colourity/doubly |
| Dyeing waste water sample | 7～8 | 800～1300 | 100～400 | 10～55 | 150 |
| Membrane sepn produces water | 7～8 | <50 | <15 | 0 | 1～5 |
| Discharging standards | 6.5～8.5 | <60 | 5 | 30 | |
| Clearance/% | >95％ | >90 | 100 | >96 |
Claims (4)
1. one kind utilizes the method for Integrated Films isolation technique treatment of dyeing and printing, it is characterized in that: the method is by pretreatment system, ultrafiltration (UF) system, reverse osmosis (RO) system and cleaning system 4 part composition, wherein ultrafiltration system and reverse osmosis system are the keys of the method.
2. utilize concrete steps for Integrated Films isolation technique treatment of dyeing and printing, it is characterized in that: first will flocculate to dyeing waste water and the conventional pre-treatment such as air supporting the pH value hydrochloric acid of waste water or sodium hydroxide are adjusted to 7 ~ 8; By again under the effect of hydraulic pressure by water molecules and small-molecule substance etc. through ultra-filtration membrane, the materials such as the suspended particulates in waste water, colloid, microorganism can be removed; Squeezed into by high-pressure pump by waste water in the water tank that RO film is housed, the impurity such as inorganic salt, heavy metal ion, organism, colloid, bacterium, virus in removing waste water, obtains the water meeting national wastewater discharge standard again.
3. method according to claim 2, is characterized in that: described pre-treatment comprises to flocculate to dyeing waste water and the conventional processing such as air supporting the pH value hydrochloric acid of waste water or sodium hydroxide are adjusted to 7 ~ 8.
4. method according to claim 2, is characterized in that: according to circumstances adopt corresponding chemical medicine to carry out clean to film, timing carries out low-pressure washing to film, the deposition on film surface is washed away, and makes film recover normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708698.7A CN105293767A (en) | 2015-10-27 | 2015-10-27 | Method for treating printing and dyeing wastewater through integrated membrane separation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708698.7A CN105293767A (en) | 2015-10-27 | 2015-10-27 | Method for treating printing and dyeing wastewater through integrated membrane separation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105293767A true CN105293767A (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510708698.7A Pending CN105293767A (en) | 2015-10-27 | 2015-10-27 | Method for treating printing and dyeing wastewater through integrated membrane separation technology |
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| CN (1) | CN105293767A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857392A (en) * | 2017-11-21 | 2018-03-30 | 合肥创想能源环境科技有限公司 | A kind of method of integrated membrane separation technique processing dyeing waste water |
| CN109292913A (en) * | 2018-10-23 | 2019-02-01 | 天津工业大学 | The method of sodium sulphate in full embrane method recycling cotton raffinate |
-
2015
- 2015-10-27 CN CN201510708698.7A patent/CN105293767A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857392A (en) * | 2017-11-21 | 2018-03-30 | 合肥创想能源环境科技有限公司 | A kind of method of integrated membrane separation technique processing dyeing waste water |
| CN109292913A (en) * | 2018-10-23 | 2019-02-01 | 天津工业大学 | The method of sodium sulphate in full embrane method recycling cotton raffinate |
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Application publication date: 20160203 |