Domestic sewage and industrial sewage will contain a large number of organic pollutants, their impact on water quality is mainly due to its oxygen consumption and the toxicity of some organic substances, as organic matter in sewage and sewage particles have a great relationship, generally by flocculation Precipitation method for purification. For domestic sewage suspended solids containing more negative charges, need to use with PAC and cationic polyacrylamide together, through the charge and better play the role of coagulation and sedimentation.
The selection of inorganic coagulant for domestic sewage treatment is generally carried out by using commercial grade PAC PAC. Combined with cationic polyacrylamide, it can not only play a good role in separating muddy water, but also has very good effect in the later stage of sludge dewatering.
