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Printing and dyeing wastewater recovery and disposal method

A treatment method and technology for printing and dyeing wastewater, applied in water/sewage multi-stage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high energy consumption, high investment cost and low photoelectric conversion efficiency and other problems, to achieve the effect of great economic benefits

Inactive Publication Date: 2007-06-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high investment cost, low photoelectric conversion efficiency and high energy consumption.

Method used

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  • Printing and dyeing wastewater recovery and disposal method
  • Printing and dyeing wastewater recovery and disposal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Implementation Step 1: Pretreatment of Desizing Wastewater

[0036] Take 2L of desizing wastewater (water quality: COD 5000-6500mg / L, pH12), stir vigorously, slowly add 1:5 sulfuric acid, measure the acidity in real time with a pH meter, and measure COD at different pH values ​​(filtered through filter paper), To pH = 2 or so to end.

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Abstract

The recycle treatment method for printing and dyeing wastewater aims to providing a system technique to recycle and treat the desizing, base-decrement, dyeing sewage with no effect to dyeing product quality and high yield and low cost, which comprises: taking acid-out pre-treatment to sewage for recycling slurry; then, taking A / O biochemical treatment with dyeing sewage and ozone catalytic advance treatment to recycle more than 60% water. This invention can release greatly water-resource pressure with the facility payback period less than five years.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and resource recycling, and relates to the treatment of sewage discharged from the printing and dyeing industry and the resource recycling of sewage. Background technique [0002] Printing and dyeing wastewater has the characteristics of large water volume, deep color, high alkalinity, and complex components. The wastewater contains dyes, additives, oil agents, acid-base substances, fiber impurities, and inorganic salts. Poor performance, and the composition of pollutants varies greatly with the season, production variety, market demand, and processing technology. [0003] Foreign countries have successively developed technologies such as flocculation, adsorption, chemical oxidation, irradiation, wet oxidation and biological treatment for printing and dyeing wastewater, among which biological method has been widely used as an economical and effective treatment method. At present, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/66C02F1/52C02F3/30
Inventor 赵伟荣吴忠标
Owner ZHEJIANG UNIV
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