[China Aluminum Industry Network] 1: Polyaluminum chloride is the lower price of current water treatment chemicals. 2: Polyaluminum chloride is effective in low-cost water purifiers. 3: Polyaluminum chloride adapts to a wider range of water quality. The above three points are the three reasons for the selection of polyaluminum chloride treatment for wastewater treatment. At present, the polyaluminum chloride as a water purification agent is a water treatment chemical agent with a wide range of applications and a large amount of use. Where the surface water is used as the water source for urban drinking or industrial water sources, as well as various industrial waste water, urban sewage purification treatment, oil field groundwater re-injection and sludge disposal, the flocculation treatment is often indispensable in many treatment processes. Pre-key process technology. The effectiveness of flocculation treatment, to a large extent, determines the operational status of the subsequent treatment process, and the quality and cost of the final effluent. High quality polyaluminum chloride as a new type of commercial water purifier product with 2 basic conditions 1. Efficient, polyaluminum chloride has a significant increase in the coagulation efficiency of conventional flocculants, and has a wide range of applications; 2, stable, polyaluminum chloride should have stable chemical properties, can be stored for a longer time without deterioration.