A Sewage Treatment Plant (STP) is a facility designed to remove contaminants from wastewater, primarily from household sewage. It uses physical, chemical, and biological processes to treat sewage and produce environmentally safe treated effluent and solid waste, or sludge, suitable for disposal or reuse.
Involves the physical removal of large particles and sediments through screening and sedimentation.
Biological processes such as activated sludge or biofilters degrade organic matter and remove dissolved and suspended biological waste.
Advanced treatment to remove nutrients, pathogens, and other pollutants to ensure the water is safe for discharge or reuse.
The by-product sludge is further treated, dewatered, and may be used as fertilizer or disposed of safely.