What is chemical and biological treatment of sewage treatment plant?

Chemical and biological treatments are essential processes in sewage treatment plants. Biological treatment utilizes microorganisms to break down organic matter in sewage, typically through methods like activated sludge or biofilm systems. Chemical treatment, on the other hand, involves adding chemicals to remove contaminants, such as coagulation and disinfection processes using chlorine or ozone. Together, these treatments effectively reduce pollutants, making the effluent safe for discharge or reuse.