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A kind of printing and dyeing wastewater treatment method

A technology for printing and dyeing wastewater and treatment methods, which is applied in textile industry wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problems of poor removal of toxic substances and chroma, high raw material input costs, and difficulty in printing and dyeing water. To meet emission standards and other issues, to achieve the effect of less investment, energy saving and consumption reduction, and improvement of effect

Active Publication Date: 2019-09-24
海宁华翔漂染科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the above methods, the removal effect of toxic substances and chroma in wastewater is poor, and the printing and dyeing water obtained after treatment is often difficult to meet the discharge standards, and the input cost of raw materials is very high.

Method used

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  • A kind of printing and dyeing wastewater treatment method
  • A kind of printing and dyeing wastewater treatment method
  • A kind of printing and dyeing wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for treating printing and dyeing wastewater, comprising the following steps: (1) passing the printing and dyeing wastewater into a regulating tank after heat exchange treatment through heat exchange equipment; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; Add an acid-base regulator to adjust the pH to 8.5, and the COD to 300mg / L; specifically, the acid-base regulator includes the following components in parts by weight: 25 parts of citric acid, 2 parts of sodium hydroxide, and 1 part of hydrochloric acid solution; (2) Pass the waste water into the reaction pool, add basic resin into the reaction pool, the reaction pool is a concrete pool, and discharge the waste water after stirring and reacting for 1 hour; specifically, the basic resin is a strong basic anion exchange resin, after the reaction treatment The COD of the discharged wastewater is less than 50 mg / L, specifically 40 mg / L; (3) Add phosphate substances to the wastew...

Embodiment 2

[0040] A method for treating printing and dyeing wastewater, comprising the following steps: (1) passing the printing and dyeing wastewater into a regulating pool after heat exchange treatment by heat exchange equipment; the temperature of the printing and dyeing wastewater after heat exchange is 35°C; Add an acid-base regulator to adjust the pH to 9.5, and the COD to 500mg / L; specifically, the acid-base regulator includes the following components in parts by weight: 33 parts of citric acid, 4 parts of sodium hydroxide, and 3 parts of hydrochloric acid solution; (2) Pass the waste water into the reaction pool, add basic resin into the reaction pool, the reaction pool is a concrete pool, and discharge the waste water after stirring and reacting for 2 hours; specifically, the basic resin is a strong basic anion exchange resin, after the reaction treatment The COD of the discharged wastewater is less than 50 mg / L; (3) Add phosphate substances to the wastewater, specifically sodium...

Embodiment 3

[0042] A method for treating printing and dyeing wastewater, comprising the following steps: (1) passing the printing and dyeing wastewater into a regulating tank after heat exchange treatment through heat exchange equipment; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; Add an acid-base regulator to adjust the pH to 8.5, and the COD to 300mg / L; specifically, the acid-base regulator includes the following components in parts by weight: 25 parts of citric acid, 4 parts of sodium hydroxide, and 1 part of hydrochloric acid solution; (2) Pass the waste water into the reaction pool, add basic resin into the reaction pool, the reaction pool is a concrete pool, and discharge the waste water after stirring and reacting for 1.5h; specifically, the basic resin is a strongly basic anion exchange resin, which is treated by reaction The COD of the discharged wastewater is less than 50 mg / L; (3) Add phosphate substances to the wastewater, specifically sod...

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PUM

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Abstract

The invention discloses a method for treating printing and dyeing wastewater, which includes the following steps: (1) After the printing and dyeing wastewater is subjected to heat exchange treatment through heat exchange equipment, it is passed into a regulating tank, and the pH is adjusted to 8-8.5, and the COD is 300-500mg / L; (2) Add phosphate substances to the wastewater, and mix and react for 4-6 hours; (3) Pass the wastewater in step (3) into the hydrolysis acidification tank, react for 2-3 hours, and then pass the water into the neutralization tank pool for neutralization. The invention effectively removes the bacterial flora in the printing and dyeing wastewater through the combination of pH adjustment and acidification hydrolysis, and secondly effectively reduces the COD content in the wastewater to achieve a good water treatment effect.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, and in particular relates to a method for treating printing and dyeing wastewater. Background technique [0002] In the process of cloth printing and dyeing, a large amount of printing and dyeing wastewater will be generated, and these printing and dyeing wastewater need to be treated before they can be discharged. Traditional treatment methods usually reduce the COD of wastewater through adsorption, filtration, coagulation, biochemical and other processes. However, under the above method, the removal effect of toxic substances and chroma in wastewater is poor, and the printing and dyeing water obtained after treatment is often difficult to meet the discharge standard, and the input cost of raw materials is very high. Contents of the invention [0003] In order to overcome the shortcomings of the prior art, the present invention provides a printing and dyeing w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/30
CPCC02F1/66C02F2103/30C02F1/42C02F2001/422C02F2303/04C02F2201/007C02F2201/002
Inventor 陈沛男
Owner 海宁华翔漂染科技有限公司
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