Along with the increasingly serious of water pollution, so dyeing and printing wastewater disposal of big significance: water is a kind of vulnerable to pollution and can be renewable natural resources. As the population growth and economic development from time to time. Available water quantity shortage, increasingly water crisis. According to the water industry, water supply and drainage, respectively is human nature to access and the return of the "water" two programs of renewable resources, in order to make this cycle can continue to service to humans, before returning to nature water after use, the regeneration of the required wastewater disposal, make water quality reach the nature self-purification ability accept level, restore its as the attributes of natural resources. On may continue to the implementation of the strategy of developing has very realistic significance.

Textile industry is becoming more and more developed but everyone in the development of the economy at the same time, with the improvement of my technical level in from time to time. Don t forget to waste water treatment.

Lead to discharge summary after each step of printing and dyeing wastewater composition is very complicated. With the rapid development of dyestuff industry and the finishing technology, printing and dyeing wastewater quality along with the varieties of raw material, production, production technology and management level varies. New auxiliaries, dyes, such as finishing agent in have been extensively used in dyeing and printing industry, more and more difficult to degradation of toxic organic compounds content, some even carcinogenic, mutagenic, teratogenic organic matter, especially the threat of water environment and harm to the environment is more and more big. Overall, printing and dyeing wastewater is characterized by complicated composition, high organic matter content, oxygen demand (COD, high chroma deepened learn and biochemical oxygen demand (BOD is relatively low, but poor biochemical and emissions.

To prevent the pollution of the environment, the purpose of printing and dyeing wastewater disposal is to remove all kinds of harmful substances in wastewater. The water be able to use!