Summary Polyaluminium Chloride for the treatment of oil wastewater Wastewater Technology Process Summary Polyaluminium chloride for the treatment of oil wastewater Wastewater technology is an important source of industrial pollution because of the large amount of oil, suspended solids, heavy metals, etc. Matter is harmful to the soil, aquatic organisms, human health and crop growth. Therefore, the treatment of oil-contaminated water is related to the survival and development of enterprises, and the appropriate economic treatment must be chosen. Oil waste water is divided into many industries. Oil in oil waste water mainly consists of oil slick, dispersed oil, emulsified oil, colloidal dissolved substances and suspended solids, such as oily wastewater from galvanized and color coated production lines, oily wastewater from ditches and rivers, Oil and wastewater generated by ocean engineering can be treated with water purifying agents such as polyaluminum chloride, basic aluminum chloride and polyaluminum chloride. Polyaluminum chloride is a cation of polyhydric and polynuclear complex Inorganic polymer flocculant is mainly used to purify drinking water, water is also used for special water treatment, in addition to iron, except cadmium, except fluoride, in addition to radioactive pollution, in addition to oil slick. Also used for industrial wastewater treatment, such as printing and dyeing wastewater, casting, papermaking, medicine, leather and so on are also widely used.