Wastewater treatment process for printing and dyeing wastewater

A technology for sewage treatment, printing and dyeing wastewater, applied in water/sewage treatment, flotation water/sewage treatment, water/sewage multi-stage treatment, etc. Achieve the effect of no secondary pollution, reduced pollution and simple equipment

Inactive Publication Date: 2017-05-31
ZHEJIANG DONGSHENG DYEING & PRINTING CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of this patent is that in the actual production process, due to the large differences in the selected dyes, auxiliaries and dyeing processes, the water quality and concentration of different wastewaters are quite different.
If the above-mentioned single treatment method is used, it is difficult to treat the wastewater of different concentrations to the level of the discharge standard; at the same time, it also wastes low-concentration wastewater that can be recycled after treatment, wasting resources

Method used

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  • Wastewater treatment process for printing and dyeing wastewater

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[0038] The present invention will be further explained with reference to the drawings.

[0039] A sewage treatment process used for printing and dyeing wastewater. The wastewater is detected by a wastewater concentration detector. According to the following table, the wastewater is divided into high-concentration wastewater and low-concentration wastewater. If it is high-concentration wastewater, execute process A, and if it is low-concentration wastewater, execute process B.

[0040] Table 1 Concentration Classification Standard of Influent Water Quality

[0041] project CODcrBOD 5

[0042] Process A:

[0043] 1. Put the high-concentration wastewater into the regulating tank, and adjust the pH value of the wastewater to 7.0-9.0 by adding sulfuric acid;

[0044] 2. Pass through several step grid machines in turn to remove the large suspended solids and fibers in the wastewater. The large suspended solids are plastic bags and packaging bags;

[0045] 3. Then pass the wastewater into the

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Abstract

The invention discloses a wastewater treatment process for printing and dyeing wastewater. Wastewater treatment can be carried out on wastewater with different concentrations, so that the wastewater is discharged up to the standard; and meanwhile, low-concentration wastewater can be recycled and water resources are fully utilized.

Description

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Claims

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Application Information

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Owner ZHEJIANG DONGSHENG DYEING & PRINTING CO LTD
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