Efficient use of PAC use and introduction I. Introduction: Hubei Spirit environmentally friendly production of PAC (the PAC), is a new type of inorganic polymer water purifying agent. It is between the hydrolyzate pac aluminum chloride and aluminum hydroxide between, there is a strong bridge adsorption properties pac poly ferric silicate, soluble in water along with electrochemical condensation, hydrolysis, adsorption and precipitation and other physical and chemical processes, the effect is far superior to the traditional water purifying agent of low molecular weight aluminum sulfide, ferric chloride, ferrous sulfate and alum. At home and abroad are widely used for drinking water, industrial water purification and sewage treatment sewage treatment pac, users are welcome and valued. PAC upgrade polymeric iron silicate advantages and introduce PAC upgrade polymeric silicate iron water purification materials to improve water quality is our consensus, proved by the large number of applications, integrated iron salts pac series dual advantages iron silicate polymerization using PAC upgrades iron silicate polymerization can significantly improve the effectiveness of water purification, reduce processing costs, improve water quality. People often say that everyday language sewage mean: ways to deal with sewage treatment mainly in biochemistry-based, its main feature is good biodegradability, high nitrogen, phosphorus and other organic matter content. By draining sources we can know: In fact, up sewage treatment is relatively simple. From the process point of view, the ultimate purpose of water treatment, sewage mud separation. PAC iron silicate polymerization upgrade choice is crucial to the sewage treatment plant for.