Hvdrolvze Acidification—Biological Contact Oxidation Process Treat Printin And Dying Wastewater

The printing and dying wastewater is one of the most difficult-to-treat industrial water because of its great capacity, higher organic pollutant contents, strong alkaline, and the greatly changed fluid matter, and it mainly contains dyestuff, slurry, addition agent, oil, acid and alkali, fiber impurity and machine salt, etc. Nowadays, the main methods to transact the liquid waste water are physicochemical method、biochemical method、chemical method and the craft which combines those treatments. The hydrolyze acidification-biological contact oxidation process of this text introduced is a craft with easy supervision and low cost. After the craft processing, the index such as PH, CODcr, SS and chromaticity all lower than the second standard of 《Discharge standard of water pollutants for dyeing and finishing of textile industry》 GB4287-92. If adding the Chemical coagulation stage to the processing, then the every index can reach the first standard of《Integrated wastewater discharge standard)) GB8978-1996.