Sewage treatment plants (STPs) utilize a variety of chemicals to efficiently treat wastewater and ensure the removal of contaminants. Common chemicals used in STPs include coagulants and flocculants (such as alum and polyaluminum chloride) to aid in particle aggregation, chlorine or ozone for disinfection, and pH adjusters like lime to maintain optimal treatment conditions. Netsol Wat... https://www.watertreatmentplants.in/what-chemicals-does-sewage-treatment-plant-use/