What is the role of the dosing device in the sewage treatment equipment

Water treatment basically need to add the relevant agents, such as: coagulants, flocculants, emulsifiers, anionic, cationic and so on. The role of dosing is to use chemical reactions to improve the efficiency of sewage treatment. Dosing device can do precise control of the concentration of chemicals, dosage. On the one hand, to avoid waste. On the other hand, reduce the involvement of labor. Reduce operating costs.