As a leading provider of sewage cleanup services, we understand the importance of sewage treatment for maintaining public health and preserving the environment. ## The Process of Sewage Treatment Sewage treatment involves multiple stages to remove pollutants and harmful contaminants from wastewater: * **Primary Treatment:** Screens and grit chambers remove solids and heavy particles. * **Secondary Treatment:** Biological processes (e.g., activated sludge) decompose organic matter. * **Disinfection:** Chlorine or ultraviolet light kills bacteria and other pathogens. ## What Happens to the Leftover Sewage Sludge? After treatment, wastewater is discharged into rivers or oceans. The leftover sludge, known as biosolids, is further processed: * **Dewatering:** Sludge is thickened to reduce moisture content. * **Stabilization:** Sludge is treated to destroy pathogens and stabilize organic matter. * **Disposal Options:** * **Land Application:** Biosolids can be used as fertilizer on agricultural land, providing nutrients to crops. * **Landfill Disposal:** Biosolids can be disposed of in landfills, but this option is less environmentally sustainable. * **Incineration:** Biosolids can be burned to generate energy and destroy harmful materials.