Treatment method for printing and dyeing wastewater

A technology for printing and dyeing wastewater and its treatment method, which is applied in the field of wastewater treatment and printing and dyeing wastewater treatment, can solve the problems of high difficulty, difficulty in reaching the standard of effluent, low chromaticity and COD removal rate, etc. biochemical effects

Inactive Publication Date: 2014-12-24
XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the blast aerated activated sludge method, jet aerated activated sludge method, biological turntable, etc. are also applied. The biological fluidized bed is still in the experimental application stage, but because the biological removal rate of chroma is not high, generally at 50 %, so when the water chroma is required to be high, it needs to be supplemented by physical or chemical treatment. Aerobic biological treatment has an obvious effect on BOD removal, generally up to about

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The printing and dyeing wastewater flows into the adjustment tank after removing impurities through the grid. The average residence time of the wastewater in the adjustment tank is 6 hours, and the pH value of the normal influent water is 8-9, so there is no need to set up an automatic pH adjustment system, and the wastewater is cooled by spraying Finally, the temperature of the water entering the wastewater conditioning tank is kept at 30-35 °C all year round; the residence time of the wastewater in the hydrolytic acidification tank is 8 hours, and the selected combined filler is installed in the hydrolytic acidification tank to facilitate the film formation of anaerobic bacteria. Utilize the action of acid-producing bacteria in the hydrolytic acidification stage in the anaerobic process to convert various colorants, pastes, detergents and other macromolecular organic compounds in wastewater into small molecular organic compounds that can be biodegraded, and increase the...

Embodiment 2

[0019] Embodiment two: processing effect

[0020] Using the printing and dyeing wastewater treatment method described in the present invention, the printing and dyeing wastewater produced by a certain printing and dyeing factory is treated, and the treatment results are shown in Table-1.

[0021] .

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PUM

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Abstract

The invention relates to a treatment method for printing and dyeing wastewater, and belongs to the field of methods for wastewater treatment. The treatment method for printing and dyeing wastewater comprises the following steps: removing impurities from the printing and dyeing wastewater through grids, feeding the wastewater to a regulating reservoir, utilizing a pump to lift the wastewater up to enter a hydrolysis acidification pool, conducting hydrolytic acidification, discharging the acidified water to an aerobiotic pool, conducting aeration and oxidation, discharging the wastewater from the aerobiotic pool to a sand filter, after precipitation and filtration, feeding the wastewater to a chemical oxidation pool, oxidizing the wastewater and draining when the water reaches the standard. The treatment method disclosed by the invention combines multiple treatment manners to comprehensively treat the wastewater; a total removal rate of COD (Chemical Oxygen Demand) in the wastewater by the treatment method is up to 84.4%, and the chromaticity removal rate is up to 97.2%; through practical application, by the treatment method, the precipitated sludge is fully returned to the anaerobic pool, so no residual sludge is discharged; the system is stable in running, convenient to manage, and capable of achieving a good treatment effect to obtain environment benefits and social benefits.

Description

technical field [0001] The invention relates to a treatment method for printing and dyeing wastewater, which belongs to the field of wastewater treatment methods. Background technique [0002] Printing and dyeing wastewater refers to the wastewater generated during bleaching, dyeing, printing and finishing of cotton, wool, chemical fiber and other natural fibers and chemical fiber textiles. The printing and dyeing industry is a large discharge of industrial wastewater. High color, deep chroma, high alkalinity, water quality changes, etc., are difficult to treat industrial wastewater. Due to the different dyes and auxiliaries used in the printing and dyeing industry, the nature and quantity of pollutants in the printing and dyeing wastewater discharged by each factory are also very different. Therefore, there are various pollution control methods for printing and dyeing wastewater. First of all, we should start from the idea of ​​pollution control in the whole process and ado...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
Inventor 陆强
Owner XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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