Printing and dyeing wastewater is characterized by large amount of water, color depth, BOD, COD value is high, the complexity of water quality, which is the most serious pollution of dyes. At present, the treatment of printing and dyeing wastewater by neutralization and adsorption, coagulation, ion exchange, membrane separation and other physical and chemical methods, and other methods, such as activated sludge process, oxidation pond method and other biochemical method. These methods, chemical precipitation method produces a large number of difficult to deal with sludge; oxidation method (such as hydrogen peroxide treatment effect is good but the cost is too high; biological treatment effect is not good, most commercial dye for biological organic substances toxic side effects. As a kind of important physical and chemical method, adsorption method is attached more and more importance to the discovery of new adsorption material.

The company in the years of deep processing of bentonite in the field of technology and the depth of cooperation with the Zhejiang University, based on the successful development of printing and dyeing wastewater treatment agent FH-600 products. The main materials of this product is modified nano clay, which makes full use of the characteristics of high adsorption capacity of clay minerals to reduce the COD value and color of the printing and dyeing wastewater. This product won the national science and technology progress award, two, for high-tech environmental protection products.