What is the purpose of chemical dosing in wastewater treatment?

The purpose of chemical dosing in wastewater treatment is primarily to enhance the removal of contaminants. This process involves the addition of various chemicals that can target specific pollutants in the wastewater, improving the efficiency of processes such as coagulation, flocculation, sedimentation, and disinfection. For example, chemicals like alum or ferric chloride are commonly used to help agglomerate suspended solids, making them easier to remove from the water.

By improving the efficacy of contaminant removal, chemical dosing plays a critical role in meeting discharge standards and protecting the environment from harmful pollutants. This enhances the overall performance of the treatment system, ensuring that the treated water is safe for discharge or reuse.