The nature of domestic wastewater treatment using polyaluminium chloride how? The nature of domestic wastewater treatment using polyaluminium chloride how? Ceramic products have been widely used in our lives, and the invention of pottery is also an important symbol of the progress of primitive society and culture. However, with the ceramic industry in promoting local economic development, ceramic wastewater has drawn increasing attention. In the ceramic production industry, the discharge of wastewater is large, the content of suspended solids (ss) in the wastewater is high, and some heavy metal ions are contained. Without effective flocculation treatment, it will affect the local environmental protection and the sustainable development of water resources. Therefore, researchers conducted research on ceramic wastewater treatment, the results show that the use of polyaluminum chloride, polyaluminum chloride and other coagulants can eliminate the pollution of ceramic waste water, details of the research by the Department of filtration of water purification technology as follows.