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Textile printing and dyeing wastewater processing technology

A wastewater treatment, textile printing and dyeing technology, applied in the textile field, can solve the problems of difficult treatment, large water volume changes, deep color, etc., and achieve the effects of low treatment cost, stable operation and simple operation

Inactive Publication Date: 2013-02-13
刘良贵
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Moreover, the composition of dyeing wastewater is complex, and the various organic dyes contained are difficult to degrade and have deep color, which poses a very serious threat to the environment.
This type of wastewater has high pollution indexes such as chroma, suspended solids concentration, COD chemical oxygen demand, and BOD biochemical oxygen demand, and is difficult to treat because the water quality and quantity of the wastewater are unstable.
Usually, the treatment of printing and dyeing wastewater adopts biochemical methods, but the treatment effect is often unsatisfactory in the actual operation process. The growth of biological reaction bacteria, so it is difficult to make the wastewater meet the reuse or discharge standard by using these methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Example 1, a kind of textile printing and dyeing wastewater treatment process comprises physicochemical treatment, biochemical treatment and follow-up treatment three parts:

[0020] (1) The physical and chemical treatment process is mainly to introduce the wastewater generated in the printing and dyeing workshop into the adjustment tank after passing through the grid, and then put acid or alkali into the adjustment tank to control the pH value of the wastewater at about 8.5; lead the wastewater to the reaction tank and add polymerization Ferric sulfate, added in an amount of 0.8 grams of polyferric sulfate per liter of water, is to reduce the color of printing and dyeing wastewater; then the wastewater is introduced into the primary sedimentation tank to precipitate suspended matter and reduce the temperature of the wastewater.

[0021] (2) Biochemical treatment process mainly uses microorganisms to carry out core treatment of wastewater to remove organic matter. That ...

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Abstract

The invention relates to the technical field of textile, and especially relates to a textile printing and dyeing wastewater processing technology. The technology is characterized in that physical, biological and biological processing methods are adopted to carry out multiple processing operations of textile wastewater, and the processed wastewater can be discharged in a standard reaching manner and also can be returned to a workshop for recycle in order to reach a water cycling use purpose; the environmental conditions of a biological aeration tank comprise a dissolved oxygen of 3-4mg / L, a temperature of 35-40DEG C, a pH value of 7.5-8.5, a sludge settlement ratio of about 28% to about 32%, a sludge concentration of 2-4g / L, and a sludge volume index of 90-110ml / g; and the retention time of the wastewater in the biological aeration tank is 40-60h. The technology has the advantages of stable and reliable operation, low processing cost, simple operation and the like.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a textile printing and dyeing wastewater treatment process. Background technique [0002] According to incomplete statistics. The discharge of textile dyeing wastewater in my country is about 3 million to 4 million cubic meters per day, and the dyeing factory produces 3 to 5 cubic meters of wastewater for every 100 meters of fabric processed. Moreover, the composition of dyeing wastewater is complex, and the various organic dyes contained are difficult to degrade and have deep color, which poses a very serious threat to the environment. This type of wastewater has high pollution indexes such as chroma, suspended solids concentration, COD chemical oxygen demand, and BOD biochemical oxygen demand, and is difficult to treat because the water quality and quantity of the wastewater are unstable. Usually, the treatment of printing and dyeing wastewater adopts biochemical methods, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/66C02F1/52C02F1/24C02F103/30
Inventor 刘良贵
Owner 刘良贵
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