Sewage Treatment Plants (STPs) are facilities designed to treat and purify wastewater from domestic, industrial, and commercial sources. The primary goal of an STP is to remove contaminants from sewage to produce effluent that is safe for discharge into the environment or for reuse.
The treatment process typically involves multiple stages, including primary treatment to remove solids, secondary treatment to degrade dissolved organic matter, and tertiary treatment to remove remaining contaminants. Advanced technologies such as membrane bioreactors and UV disinfection may also be employed to enhance treatment efficiency.