Environment-friendly method for treating printing and dyeing wastewater

Abstract

The invention belongs to the technical field of environment protection and particularly relates to an environment-friendly method for treating printing and dyeing wastewater. The method specifically comprises the following steps that printing and dyeing wastewater passes through gratings to remove large suspended solids and flotage, then enters a regulating pool and then is lifted to a hydrolysis acidification pool with a pump; effluent obtained after hydrolysis acidification automatically flows into a contact oxidation pool, most organic substances and the color scale are removed in the contact oxidation pool through the microbial action, and then the effluent enters a settling pool; organic substances are removed, the contact oxidation pool serves as the body process of printing and dyeing wastewater treatment, elastic stereo filling and semi-soft combined filler is put in the pool, and the color scale is removed; after the printing and dyeing wastewater is treated through coagulating settling, further decoloring is needed if the effluent is still dark in color, and the method is used for solving the problem that the standard is difficult to meet with the current treatment technology.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to an environmental protection method for treating printing and dyeing wastewater. Background technique [0002] Industrial wastewater includes production wastewater and production sewage, which refers to wastewater and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products, by-products and pollutants produced in the production process lost with water. With the rapid development of industry, the types and quantities of wastewater have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. Therefore, for the protection of the environment, the treatment of industrial wastewater is more important than the treatment of urban sewage. [0003] With the development of the printing and dyeing industry, a...

AI Technical Summary

Problems solved by technology

[0003] With the development of the printing and dyeing industry, a large number of chemical fiber products have appeared, and the application of new chemical pulp, dyeing materials and finishing agents has changed the composition of printing and dyeing wastewater, making the treatment more difficult. The simple aerobic biological treatment method The COD and chroma of the effluent are difficult to meet the standards and seriously pollute the environment. It is a combination of biological and chemical methods of hydrolysis acidification and contact oxidation. The coagulation process can solve this problem