Advanced treatment and recycling technology of printing and dyeing wastewater

A technology for advanced treatment, printing and dyeing wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, water pollutants, etc. Blocking and other problems, to achieve the effect of economical and reasonable process route design, prevent fouling and blockage, and facilitate the replacement of filter materials

Inactive Publication Date: 2015-09-09
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing printing and dyeing wastewater advanced treatment and reuse process, some process route design is unreasonable, some cost is too high, and most of them have serious fouling problem of reverse osmosis membrane treatment system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The present invention is an advanced treatment and reuse process of printing and dyeing wastewater, which includes: wastewater collection and adjustment pool + biochemical aerobic system + secondary sedimentation tank + third-stage flocculation sedimentation + MBR membrane bioreactor + bag filter + reverse osmosis membrane system .

[0017] Apply the printing and dyeing wastewater advanced treatment and reuse process of the present invention to the advanced treatment and reuse treatment of the printing and dyeing wastewater flowing out of a certain A printing and dyeing factory, the situation is as follows:

[0018] Untreated raw printing and dyeing wastewater quality: COD value 2000ppm, suspended matter 180ppm, turbidity 165ppm;

[0019] Process:

[0020] Firstly, pretreatment is carried out through the wastewater collection and adjustment tank;

[0021] Then through the biochemical aerobic system treatment, the COD value is reduced to 100ppm. Although the organic ma...

Embodiment 2

[0026] Apply the printing and dyeing wastewater advanced treatment and reuse process of the present invention to the advanced treatment and reuse treatment of the printing and dyeing wastewater flowing out of a certain B printing and dyeing factory, the situation is as follows:

[0027] Untreated raw printing and dyeing wastewater quality: COD value 1000ppm, suspended matter 105ppm, turbidity 95ppm;

[0028] Process:

[0029] Firstly, pretreatment is carried out through the wastewater collection and adjustment tank;

[0030] Then through the biochemical aerobic system treatment, the COD value is reduced to 80ppm. Although the organic matter content cannot meet the water intake requirements of the reverse osmosis membrane, the organic matter has been decomposed from large molecules to small molecules;

[0031] Then through the secondary sedimentation tank + three-stage flocculation sedimentation + MBR membrane bioreactor + bag filter four-stage continuous filtration treatment,...

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PUM

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Abstract

The invention discloses an advanced treatment and recycling technology of printing and dyeing wastewater. In the technology, a wastewater collecting and adjusting tank, a biochemical aerobic system, a secondary sedimentation tank, a tertiary flocculation and sedimentation tank, an MBR membrane bioreactor, a bag filter and a reverse osmosis membrane system are adopted. According to the technology, organic matters are treated by the biochemical aerobic system to be decomposed into small molecules from macromolecules, so that the separation and purification of the reverse osmosis membrane to sewage are facilitated, and the pollution and blockage of the organic matters to a membrane component are prevented; suspended matters and turbidity can completely meet the water inflowing requirement of the membrane component of the reverse osmosis membrane through four-stage continuous filtering by the secondary sedimentation tank, the tertiary flocculation and sedimentation tank, the MBR membrane bioreactor and the bag filter; the design of the process route is economical and reasonable, and the possibility of the pollution blockage of a printing and dyeing wastewater reverse osmosis membrane treatment system can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a sewage treatment process, in particular to an advanced treatment and reuse process of printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater has the characteristics of large amount of polluted water, high content of organic pollutants, high alkalinity, large changes in water quality, and difficult biochemistry. It is one of the difficult industrial wastewaters. Alkali, fiber impurities, sand substances, inorganic salts, etc. At present, the main methods used for the treatment of printing and dyeing wastewater include physical and chemical methods, biochemical methods, chemical methods and a combination of several processes. Printing and dyeing wastewater can meet the wastewater discharge requirements after advanced treatment. With the improvement of environmental protection requirements, in order to make the wastewater meet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
Inventor 夏志先
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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