CN105271572A - Low-cost reclaimed water reuse treatment process for printing and dyeing wastewater - Google Patents
Low-cost reclaimed water reuse treatment process for printing and dyeing wastewater Download PDFInfo
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- CN105271572A CN105271572A CN201510704801.0A CN201510704801A CN105271572A CN 105271572 A CN105271572 A CN 105271572A CN 201510704801 A CN201510704801 A CN 201510704801A CN 105271572 A CN105271572 A CN 105271572A
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Abstract
The invention relates to a low-cost reclaimed water reuse treatment process for printing and dyeing wastewater, and belongs to the technical field of wastewater treatment. The low-cost reclaimed water reuse treatment process for the printing and dyeing wastewater comprises a pretreatment step, and comprises a membrane filtration step and a de-coloration step sequentially. In the membrane filtration step, the printing and dyeing wastewater treated in the pretreatment step is filtered by adopting an ultra-filtration membrane or a micro-filtration membrane. In the de-coloration step, de-coloration is performed by adopting an adsorbent in a de-coloration tank, wherein the adsorbent is a macro-pore adsorbent. According to the reclaimed water reuse treatment process for the printing and dyeing wastewater, the equipment cost and the operation cost are low, and are half of the costs of a current reclaimed water reuse process, the reuse water yield is high, and effluent quality can completely meet requirements of reclaimed water reuse of wastewater in the printing and dyeing process.
Description
Technical field
The present invention relates to technical field of waste water processing, be specifically related to a kind of low cost dyeing waste water Treated sewage reusing treatment process.
Background technology
Textile printing and dyeing wastewater has the features such as the water yield is large, organic pollutant content is high, alkalescence is large, change of water quality is large, belong to one of unmanageable trade effluent, containing dyestuff, slurry, auxiliary agent, finish, soda acid, fiber impurity, sand class material, inorganic salt etc. in waste water; In recent years, the rise of membrane separation technique is that the process of dyeing waste water brings new reform, and a lot of textile mills adopt membrane separation technique to be that Main Means carrys out treatment of dyeing and printing.
Authorization Notice No. is a kind of method that the Chinese patent of CN202131163U provides that membrane technique carrys out treatment of dyeing and printing, by the dyeing waste water after pretreated successively by after micro-filtration/ultra-filtration membrane and nanofiltration/reverse osmosis membrane, can reach reuse standard.
But this technique exists, and some is not enough: 1. RO(reverse osmosis) or Nanofiltering membrane treatment process due to reverse osmosis membrane itself resistance comparatively greatly, thus operation energy consumption is very high; 2. reverse osmosis membrane and nanofiltration membrane itself easily contaminated, cleaning frequency is high, cost increase; 3. reverse osmosis membrane and nanofiltration membrane many employings cross-flow art breading waste water, due to the characteristic of dyeing waste water itself, the dense glassware for drinking water on stream film surface has higher specific conductivity and COD value, causes it and be not suitable for carrying out a biological disposal upon also not meeting the standard of directly discharge, dense water be treated as a great problem.
Due to above problem, reverse osmosis membrane processing equipment has been placed in unfrequented on one side by partial weave factory, and the optimization process of dyeing waste water is had reached an impasse.
Summary of the invention
Object of the present invention is to solve the problem, and provides a kind of with low cost, treatment process that can meet dyeing waste water Treated sewage reusing standard.
The technical scheme that the present invention solves the problem is as follows:
A kind of low cost dyeing waste water Treated sewage reusing treatment process, comprises pre-treatment step, comprises membrane filtration step and decolorization process successively after described pre-treatment step; Ultra-filtration membrane or microfiltration membrane is adopted to filter the dyeing waste water after described pre-treatment step process in described membrane filtration step.
Preferred as technique scheme, described decolorization process adopts the sorbent material in bleacher to decolour.
Preferred as technique scheme, described sorbent material is macroporous adsorbent.
Preferred as technique scheme, adopts at least two bleachers in described decolorization process, one of them bleacher is used for decolouring, and remaining bleacher is in cleaning or stand-by state.
Preferred as technique scheme, described pre-treatment step comprises flocculating settling step and pre-filtration step successively.
Preferred as technique scheme, described flocculating settling step comprises first sedimentation and secondary settlement.
Preferred as technique scheme, described pre-filtration step comprises at least one filtration step.
Supernatant liquid after flocculating settling step enters membrane filter plant again after pre-filtration step goes out large particulate matter, alleviates the filter pressure of membrane filter plant; Pre-filtering equipment can adopt cloth envelop collector, winding tube strainer etc.; For the dyeing waste water that solid content is higher, the twice pre-filtration step that aperture also can be adopted to successively decrease successively carries out pre-treatment.
Preferred as technique scheme, in described pre-filtration step and membrane filtration step, filter plant used is equipped with back-purge system and/or chemically-cleaning device.
Preferred as technique scheme, what adopt in described membrane filtration step is the membrane module comprising aeration performance.
Aeration can form scouring effect on film surface, alleviates the pollution on film surface, extends the work-ing life of film device.
Preferred as technique scheme, described membrane filtration step adopts immersion negative pressure-pumping filter type to filter dyeing waste water.
To the reuse standard of water in dyeing waste water, need assurance four main points:
1. hardness: hardness directly affects the height of the defective product rate of printing product, in present treatment technique, the calcium ions and magnesium ions in waste water forms particulate matter after flocculation, then retaining through pre-filtration step and membrane filtration step, can ensure that reuse water hardness is less than 50, meet Treated sewage reusing requirement;
2. turbidity: remove by the suspended substance in waste water, can be up to standard after pre-filtration step and membrane filtration step;
3. colourity: for understain look, the chromaticity requirements of reuse water is higher, is made the colourity of reuse water up to standard by decolorization process;
4. potential of hydrogen: general dyeing and printing process adopts PH to be neutral water, in major part, water can direct reuse without the need to regulating.
In sum, this technique can meet the standard of dyeing waste water Treated sewage reusing, and with low cost, does not have unnecessary waste water to discharge.
In addition, membrane filtration step significantly reduces the pressure of decolorization process, makes bleacher give full play to its decolorization, long service life, good decolorizing effect.
Accompanying drawing explanation
Fig. 1 is low cost dyeing waste water Treated sewage reusing processing technological flow figure described in embodiment 1;
Fig. 2 is low cost dyeing waste water Treated sewage reusing processing technological flow figure described in embodiment 2;
Fig. 3 is low cost dyeing waste water Treated sewage reusing processing technological flow figure described in embodiment 3.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Embodiment in the present invention, those of ordinary skill in the art, not doing other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with accompanying drawing, with embodiment, the present invention is described in detail.
Embodiment 1: a kind of low cost dyeing waste water Treated sewage reusing treatment process, comprises pre-treatment step, and the membrane filtration step be successively set on after described pre-treatment step and decolorization process; Adopt ultra-filtration membrane to filter the dyeing waste water after described pre-treatment step process in described membrane filtration step, described decolorization process adopts the macroporous adsorbent in bleacher to decolour.
Described pre-treatment step comprises flocculating settling step and pre-filtration step successively, and described flocculating settling step comprises first sedimentation and secondary settlement, and described pre-filtration step comprises one cloth bag pre-filtering.
Embodiment 2: a kind of low cost dyeing waste water Treated sewage reusing treatment process, comprises pre-treatment step, and the membrane filtration step be successively set on after described pre-treatment step and decolorization process; Ultra-filtration membrane is adopted to filter the dyeing waste water after described pre-treatment step process in described membrane filtration step, described decolorization process adopts the macroporous adsorbent in bleacher to decolour, described bleacher is three, three bleachers are in two decolourings respectively, a cleaning or stand-by state, ensure that decolouring is uninterrupted.
Described pre-treatment step comprises flocculating settling step and pre-filtration step successively, and described flocculating settling step comprises first sedimentation and secondary settlement, and described pre-filtration step comprises one winding tube filtration step and Bag filter step thereafter.
Embodiment 3: a kind of low cost dyeing waste water Treated sewage reusing treatment process, comprises pre-treatment step, and the membrane filtration step be successively set on after described pre-treatment step and decolorization process; Adopt ultra-filtration membrane to filter the dyeing waste water after described pre-treatment step process in the mode of immersion negative pressure-pumping in described membrane filtration step, and be equipped with chemically-cleaning device and aerating apparatus; Described decolorization process adopts the macroporous adsorbent in bleacher to decolour.
Described pre-treatment step comprises flocculating settling step and pre-filtration step successively, and described flocculating settling step comprises first sedimentation and secondary settlement, and described pre-filtration step comprises one winding tube and filters, and winding tube filters and is equipped with back-purge system.
Claims (10)
1. a low cost dyeing waste water Treated sewage reusing treatment process, comprises pre-treatment step, it is characterized in that: comprise membrane filtration step and decolorization process successively after described pre-treatment step; Ultra-filtration membrane or microfiltration membrane is adopted to filter the dyeing waste water after described pre-treatment step process in described membrane filtration step.
2. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 1, is characterized in that: described decolorization process adopts the sorbent material in bleacher to decolour.
3. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 2, is characterized in that: described sorbent material is macroporous adsorbent.
4. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 2, is characterized in that: adopt at least two bleachers in described decolorization process, and one of them bleacher is used for decolouring, and remaining bleacher is in cleaning or stand-by state.
5. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 1, is characterized in that: described pre-treatment step comprises flocculating settling step and pre-filtration step successively.
6. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 5, is characterized in that: described flocculating settling step comprises first sedimentation and secondary settlement.
7. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 5, is characterized in that: described pre-filtration step comprises at least one filtration step.
8. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 5, is characterized in that: in described pre-filtration step and membrane filtration step, filter plant used is equipped with back-purge system and/or chemically-cleaning device.
9. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 1, is characterized in that: what adopt in described membrane filtration step is the membrane module comprising aeration performance.
10. a kind of low cost dyeing waste water Treated sewage reusing treatment process according to claim 1, is characterized in that: described membrane filtration step adopts submergence filter type to filter dyeing waste water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510704801.0A CN105271572A (en) | 2015-10-27 | 2015-10-27 | Low-cost reclaimed water reuse treatment process for printing and dyeing wastewater |
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| CN201510704801.0A CN105271572A (en) | 2015-10-27 | 2015-10-27 | Low-cost reclaimed water reuse treatment process for printing and dyeing wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231570A (en) * | 2018-10-25 | 2019-01-18 | 刘慧� | A kind of sewage treatment process of food and cultivation industry |
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| KR100864587B1 (en) * | 2007-05-25 | 2008-10-20 | 호서대학교 산학협력단 | Method and apparatus for disposing wastewater in digital textile printing |
| CN202131163U (en) * | 2011-07-01 | 2012-02-01 | 安徽普朗膜技术有限公司 | Printing and dyeing wastewater treatment and recycling system |
| CN103011524A (en) * | 2012-12-28 | 2013-04-03 | 湖北君集水处理有限公司 | Recycling and processing method for printing and dyeing wastewater |
| CN104098206A (en) * | 2014-07-25 | 2014-10-15 | 宁波清水源水务科技有限公司 | Method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin |
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Patent Citations (4)
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| KR100864587B1 (en) * | 2007-05-25 | 2008-10-20 | 호서대학교 산학협력단 | Method and apparatus for disposing wastewater in digital textile printing |
| CN202131163U (en) * | 2011-07-01 | 2012-02-01 | 安徽普朗膜技术有限公司 | Printing and dyeing wastewater treatment and recycling system |
| CN103011524A (en) * | 2012-12-28 | 2013-04-03 | 湖北君集水处理有限公司 | Recycling and processing method for printing and dyeing wastewater |
| CN104098206A (en) * | 2014-07-25 | 2014-10-15 | 宁波清水源水务科技有限公司 | Method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin |
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| CN109231570A (en) * | 2018-10-25 | 2019-01-18 | 刘慧� | A kind of sewage treatment process of food and cultivation industry |
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