Treatment Technology of Difficult-Biodegradable Printing and Dyeing Waste-Water

Abstract

The pollution of printing and dyeing waste-water mainly comes from dyes. In the process of printing and dyeing, different dyeing processes produce different pollutants, resulting in the difference of their properties. The treatment of printing and dyeing waste-water, according to the difference of technical principles, mainly includes seven treatment technologies: physical method, biochemistry method, physical chemistry method, ozone oxidation method, Fenton reagent oxidation method, photocatalytic oxidation method and wet (catalytic) oxidation method. Different treatment methods are used for waste-water with different properties and concentrations. Biochemical decomposition of organic matter in waste-water by microbial metabolism is a common method for the treatment of printing and dyeing waste-water.