污水处理剂聚丙烯酰胺的选型问题（Selection of polyacrylamide for sewage treatment agent）.docVIP

污水处理剂聚丙烯酰胺的选型问题（Selection of polyacrylamide for sewage treatment agent） The industrial process of solid-liquid separation by polyacrylamide flocculant to do general use, including settlement, clarification, concentration and sludge dewatering process, the application of the industry is relatively wide, according to the source of the sewage is mainly divided into two kinds: city sewage and industrial wastewater. City sewage refers to the system of sewage discharged into urban sewage collectively, at the same time also includes the city sewage and industrial sewage, city sewage in the choice of polyacrylamide as flocculant, using cationic polyacrylamide, ionic degree in general about 40%~60%, of course, according to the different water quality, also have to analyze specific issues. Industrial wastewater: to classify words according to the chemical properties of main pollutants contained in industrial wastewater, mainly divided into: containing organic pollutants mainly containing organic wastewater and inorganic pollutants, and inorganic waste water containing organic and inorganic mixed wastewater, wastewater containing radioactive substances and pollution only heating cooling water and wastewater. For example: food or petroleum processing wastewater is organic waste water, and mineral processing wastewater and electroplating wastewater is inorganic waste water. Polyacrylamide classified according to industrial processing object, can be divided into: Metallurgical Wastewater, textile wastewater, papermaking wastewater and tannery wastewater, pesticide wastewater, oil refining wastewater, mineral processing industry, dyeing industry and sugar industry etc.. Activated sludge treatment is usually used in municipal wastewater and industrial wastewater. Biochemical sludge is often a highly hydrophilic colloid, which is difficult to dehydrate because of its high organic content. With cationic polyacrylamide treatment, less dosage, high dehydration efficiency, easy separati