Sodium bisulfite is commonly used as a reducing agent in industrial applications. It is also used to remove residual chlorine in both municipal water and industrial applications to reduce the residual chlorine before discharging to the service reservoir.
In drinking water treatment, sodium bisulfite is often added after super chlorination, to reduce the residual chlorine before discharging to the service reservoir.
In wastewater treatment, sodium bisulfite is often added following disinfection with chlorine prior to discharging the effluent to the receiving water. Residual chlorine can have a negative impact on aquatic life.
