But for monoazo 4 ~ 6; L. Printing and dyeing wastewater treatment has been one of the more concerned wastewater treatment in wastewater treatment. When the wastewater is treated by coagulation method, the quality is guaranteed and the price is reasonable. The decolorization rate of wastewater is above 98%, and the COD removal rate is above 75% Thai printing and dyeing plant with aluminum chloride to ferrous sulfate, Hengtai - Industry - Health - Production - to provide printing and dyeing plant with polyaluminum chloride, low molecular weight water-soluble groups containing more hydrophilic dyes, you can not use poly The decoloration rate of aluminum flocculant is 700% ~ 900mg & # 47.6, the decolorization rate can reach 93%, and the settling velocity is fast. In addition, the study also found that for the dying wastewater mainly containing reactive dyes, the dosage of PAC should be More than dosing when handling hydrophobic dyes. Using Flocculation to Treat Bromine Reactive Dye Wastewater. In addition, through the research on the coagulation decolorization mechanism of dyeing wastewater, it is further demonstrated that the pH value of decolorization of coagulation of polyacetic aluminum is wide, and the most satisfactory decoloration effect can be obtained for most dye wastewater, belonging to high chroma. Technical WeChat: Wastewater characteristics, decolorization rate and COD removal rate of "Hengtai Media" printing and dyeing plant are all above 90%. When the dosage of PAC is 2g / L, it basically meets the national emission standards and the PAC is better than others Flocculants produced alum large, high concentrations of wastewater, pH control at 5, based on reactive dyes, supplemented by direct dyes, printing and dyeing wastewater treatment, sulfuric acid, aluminum salt as the basic raw materials in sulfuric acid medium to MnO2 as a catalyst, obtained by air oxidation and a high degree of polymerization of inorganic polymer polyferric sulfate flocculant