CN102381810A - Recycling process for printing and dyeing waste water - Google Patents
Recycling process for printing and dyeing waste water Download PDFInfo
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- CN102381810A CN102381810A CN2011102806235A CN201110280623A CN102381810A CN 102381810 A CN102381810 A CN 102381810A CN 2011102806235 A CN2011102806235 A CN 2011102806235A CN 201110280623 A CN201110280623 A CN 201110280623A CN 102381810 A CN102381810 A CN 102381810A
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Abstract
The invention relates to the technical field of sewage treatment, in particular to a recycling process for printing and dyeing waste water. The recycling process for printing and dyeing waste water includes firstly, performing COD (chemical oxygen demand) suspension removing of waste water in a suspension tank to reduce COD concentration, secondly, extruding sludge in the waste water by the aid of a filter press, thirdly, biochemically treating the waste water in a biochemical tank to reduce the COD concentration, and fourthly, filtering the waste water by the aid of a filtering device and discharging the water into a clean water tank for recycling after separation. The recycling process for printing and dyeing waste water is fine in treatment effect, safe, reliable and low in treatment cost.
Description
Technical field
The present invention relates to technical field of sewage, specifically a kind of dyeing waste water recycles technology.
Background technology
At present treatment of dyeing wastewater is not generally all reached the emission request of country, then environment is produced and pollute, present printing and dyeing mill is everywhere; Really environment has been produced very big influence; Severe contamination the environment of people life, do not reach waste water reclamation more and utilize again, the purpose that recycles.
Summary of the invention
The present invention provides the dyeing waste water that a kind of treatment effect is good, safe and reliable, processing cost is low to recycle technology.
The present invention realizes through following technical proposals.
Dyeing waste water recycles technology, it is characterized in that may further comprise the steps:
(1), the suspension of in the suspension pond, waste water being carried out COD removes, and reduces COD concentration;
(2), through pressure filter the mud in the waste water is extruded;
(3), in biochemistry pool, waste water is carried out biochemical treatment, reduction COD concentration;
(4), waste water is filtered, separate, and enter clean water basin and recycle through filtration unit.
Said step (1) is provided with the high-concentration waste water of discharging from printing and dyeing workshop before and produces acid out through adjustment pH value, reduces COD concentration, and separates, extracts the step (a) of desizing agent.
Adopt the pH value that adds sulfuric acid adjustment waste water to acid in the said step (a).
Said step (1) adopts the pH value that adds soda ash adjustment waste water to neutral earlier, and the waste water in the suspension pond is pressed into air again, waste water is stirred up and down carry out aeration, and the waste water dosing in settling tank at last precipitates.
Filtration unit comprises security personnel strainer, reverse osmosis membrane filt and controlling box in the said step (4), after filtering through security personnel's strainer earlier, under the control of controlling box, filters through reverse osmosis membrane filt again.
Said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 3-9, the life condition of destruction bacterium.
The scope of said step (a) middle and high concentration waste water COD is between 900-24000.
Isolated desizing agent is a polyacrylic ester in the said step (a).
The beneficial effect that the present invention brought is: among the present invention, can significantly reduce the COD value of waste water through step (a), and can from waste water, isolate polyacrylic ester; It is desizing agent; Said polyacrylic ester can be reused, and the cost that utilizes the present invention to handle one ton of waste water is about 60 yuan, can produce the polyacrylic ester of 5kg approximately; Said polyacrylic ester market price is 80 yuan/kg, then can produce economic benefit through step (a); PH value in said step (1) the adjustment suspension pond is for next step aeration is prepared; Carry out aeration through in waste water, being pressed into air, can waste water stirred up and down, play the effect of stirring; Aeration proceeds to and begins to have cotton-shaped object to occur about 14 hours in the waste water, and along with the increase of time, cotton-shaped object increases gradually; Make the COD factor of waste water produce suspension, form floss and remove, reach peak until 22 hours cotton-shaped objects; COD decline this moment 200-600 mainly removes acetic acid etc., and the time further increases COD decline DeGrain; Then can make the COD 50%-80% that further descends to the settling tank dosing, thereby reach the effect of a large amount of removal COD; Said step (2) filters out the mud that is precipitated out, for next step is prepared; Said step (3) further reduces the COD value through biochemical treatment; Security personnel's strainer and reverse osmosis membrane filt through in the said step (4) make waste water reach emission request, and directly recycle and reuse; Said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 3-9; Destroy the life condition of bacterium; Can prevent that reverse osmosis membrane is by bacterial plugging; Intermittence utilizes density wastewater during directly reverse osmosis membrane to be washed, and utilizes the density wastewater during killing bacteria, prevents that bacterium from resting on reverse osmosis membrane for a long time and forming fouling.
Among the present invention; Said waste water is reused electric conductivity and is changed test through passing its electric conductivity of reverse osmosis membrane than pure water greatly 120 times with the tap water repetition; Dyeing coloured light there is not influence; Its water is returned to equally with tap water through being heated to 100 degree and then being cooled to 20 its electric conductivitys of degree at once, and recycle of wastewater does not have influence to dyeing quality, and recycling of water can effectively reduce production costs.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further explain.
Fig. 1 recycles artwork for dyeing waste water according to the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
Embodiment one: recycle the implementation of processes example as dyeing waste water according to the invention, may further comprise the steps like Fig. 1: (1), the suspension of in the suspension pond, waste water being carried out COD are removed, and reduce COD concentration; (2), through pressure filter the mud in the waste water is extruded; (3), in biochemistry pool, waste water is carried out biochemical treatment, reduction COD concentration; (4), waste water is filtered, separate, and enter clean water basin and recycle through filtration unit.
In the present embodiment, said step (1) adopts the pH value to 7.5 that adds soda ash adjustment waste water earlier, and the waste water in the suspension pond is pressed into air again, waste water is stirred up and down carry out aeration, and the waste water dosing in settling tank at last precipitates.
In the present embodiment, filtration unit comprises security personnel strainer, reverse osmosis membrane filt and controlling box in the said step (4), after filtering through security personnel's strainer earlier, under the control of controlling box, filters through reverse osmosis membrane filt again.
In the present embodiment, said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 3, the life condition of destruction bacterium.
Embodiment two: recycle the implementation of processes example as dyeing waste water according to the invention; Be with the difference of embodiment one: said step (1) is provided with the high-concentration waste water of discharging from printing and dyeing workshop before and produces acid out through adjustment pH value; Reduce COD concentration, and separate, extract the step (a) of desizing agent; Said step (a) middle and high concentration COD value of waste water is 22400, and the pH value is 12.79; Adopt the pH value to 1.8 that adds sulfuric acid adjustment waste water in the said step (a), this moment, the COD value of waste water was 4640; Said step (1) adopts the pH value that adds soda ash adjustment waste water to neutral earlier, and the waste water in the suspension pond is pressed into air again, waste water is stirred up and down carry out aeration, and the waste water dosing in settling tank at last precipitates; Said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 6, the life condition of destruction bacterium; Isolated desizing agent is a polyacrylic ester in the said step (a).
In the present embodiment, all the other steps are consistent with embodiment one with parameter, give unnecessary details no longer one by one here.
Embodiment three: recycle the implementation of processes example as dyeing waste water according to the invention, be with the difference of embodiment two: said waste water COD is 24000, and the pH value is 13.5; Adopt the pH value to 2.1 that adds sulfuric acid adjustment waste water in the said step (a), this moment, the COD value of waste water was 5040; Said step (1) adopts the pH value that adds soda ash adjustment waste water to neutral earlier; Said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 9, the life condition of destruction bacterium.
In the present embodiment, all the other steps are all consistent with embodiment two with parameter, give unnecessary details no longer one by one here.
Embodiment four: recycle the implementation of processes example as dyeing waste water according to the invention, be with the difference of embodiment one: said waste water COD is 1600, and the pH value is 3.59; The pH value to 7 that adds soda ash adjustment waste water, this moment, the COD value of waste water was 1420; It is 1120 that 22 hours aeration COD are carried out in said step (1) entering COD suspension pond, pH8.2; Said step (2) dosing post precipitation COD is 425, pH7.96; Through said step (4) processed waste water pH is 7.5, and COD is 102; Adopt nine reverse osmosis membranes; Said controlling box is set and was run well 20 seconds, blowdown 3 seconds, and every not overlapping row of film is 3 seconds in 27 seconds, and top pressure is 15K; Minimal pressure is 8.5KG, and water meter shows 16 tons/hour in clear water, 2 tons/hour in sewage; Clear water advances dyeing workshop to be reused, and sewage advances waterwater entrance to be handled again, and the clear water water rate is 89%; COD is less than 50, and the sewage water rate is 11%, and COD is 1080.
In the present embodiment, all the other steps are all consistent with embodiment one with parameter, give unnecessary details no longer one by one here.
Embodiment five: recycle the implementation of processes example as dyeing waste water according to the invention, be with the difference of embodiment four: the COD of said waste water is 900, and the pH value is 3.59; Adopt four reverse osmosis membranes; Controlling box is set and was run well 4 seconds, blowdown 3 seconds, and top pressure is 12.5KG, and minimal pressure is 8KG, and water meter shows 6.5 tons/hour in clear water, 5 tons/hour in sewage; Clear water water rate 67% COD is less than 50, and sewage water rate 43% COD1417, this water get into the suspension physico-chemical process and reach operation later on.
In the present embodiment, all the other steps are all consistent with embodiment four with parameter, give unnecessary details no longer one by one here.
Claims (8)
1. dyeing waste water recycles technology, it is characterized in that may further comprise the steps:
(1), the suspension of in the suspension pond, waste water being carried out COD removes, and reduces COD concentration;
(2), through pressure filter the mud in the waste water is extruded;
(3), in biochemistry pool, waste water is carried out biochemical treatment, reduction COD concentration;
(4), waste water is filtered, separate, and enter clean water basin and recycle through filtration unit.
2. dyeing waste water as claimed in claim 1 recycles technology; It is characterized in that said step (1) is provided with the high-concentration waste water of discharging from printing and dyeing workshop before and produces acid out through adjustment pH value; Reduce COD concentration, and separate, extract the step (a) of desizing agent.
3. dyeing waste water as claimed in claim 2 recycles technology, it is characterized in that adopting in the said step (a) the pH value that adds sulfuric acid adjustment waste water to acid.
4. dyeing waste water as claimed in claim 1 recycles technology; It is characterized in that said step (1) adopts the pH value that adds soda ash adjustment waste water to neutral earlier; Waste water in the suspension pond is pressed into air again; Waste water is stirred up and down carry out aeration, the waste water dosing in settling tank at last precipitates.
5. dyeing waste water as claimed in claim 1 recycles technology; It is characterized in that filtration unit comprises security personnel strainer, reverse osmosis membrane filt and controlling box in the said step (4); After filtering through security personnel's strainer earlier, under the control of controlling box, filter again through reverse osmosis membrane filt.
6. recycle technology like each described dyeing waste water of claim 1-5, it is characterized in that said dyeing waste water recycles technology and also comprises directly with the waste water flushing reverse osmosis membrane of pH value between 3-9, the life condition of destruction bacterium.
7. dyeing waste water as claimed in claim 2 recycles technology, and the scope that it is characterized in that said step (a) middle and high concentration waste water COD is between 900-24000.
8. dyeing waste water as claimed in claim 2 recycles technology, it is characterized in that isolated desizing agent is a polyacrylic ester in the said step (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102806235A CN102381810A (en) | 2011-09-21 | 2011-09-21 | Recycling process for printing and dyeing waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102806235A CN102381810A (en) | 2011-09-21 | 2011-09-21 | Recycling process for printing and dyeing waste water |
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| CN102381810A true CN102381810A (en) | 2012-03-21 |
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| CN2011102806235A Pending CN102381810A (en) | 2011-09-21 | 2011-09-21 | Recycling process for printing and dyeing waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011522A (en) * | 2012-12-27 | 2013-04-03 | 茂名阪田油墨有限公司 | Method for treating wastewater generated during printing ink preparation process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733625A (en) * | 2004-08-03 | 2006-02-15 | 李双民 | Textile printing and dyeing waste water processing system and method |
| CN101624252A (en) * | 2009-08-06 | 2010-01-13 | 江苏省环境科学研究院 | Efficient treatment process for printing and dyeing waste water |
| CN101830597A (en) * | 2009-03-09 | 2010-09-15 | 江西金达莱环保研发中心有限公司 | Treatment method of printing and dying wastewater |
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- 2011-09-21 CN CN2011102806235A patent/CN102381810A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733625A (en) * | 2004-08-03 | 2006-02-15 | 李双民 | Textile printing and dyeing waste water processing system and method |
| CN101830597A (en) * | 2009-03-09 | 2010-09-15 | 江西金达莱环保研发中心有限公司 | Treatment method of printing and dying wastewater |
| CN101624252A (en) * | 2009-08-06 | 2010-01-13 | 江苏省环境科学研究院 | Efficient treatment process for printing and dyeing waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011522A (en) * | 2012-12-27 | 2013-04-03 | 茂名阪田油墨有限公司 | Method for treating wastewater generated during printing ink preparation process |
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Application publication date: 20120321 |