## Sewage Treatment Sewage is wastewater discharged from homes, businesses, and industries. It contains a complex mixture of organic and inorganic matter, including harmful bacteria and pathogens. Sewage cleanup service is essential for the safe and efficient removal and treatment of sewage to protect public health and the environment. ## How Clean Is Water After Sewage Treatment? After undergoing sewage treatment, the resulting water is disinfected to eliminate bacteria and other harmful microorganisms. The level of cleanliness of the treated water is determined by the specific treatment processes employed. ### Effluent Standards Effluent standards are established by regulatory agencies to ensure the safety of treated water discharged into natural water bodies or reused for various purposes. These standards specify acceptable levels of various contaminants, including: - Biochemical oxygen demand (BOD) - Total suspended solids (TSS) - Fecal coliform bacteria ### Treatment Processes Sewage treatment typically involves multiple stages, including: **1. Primary Treatment:** Removes large solids and debris through physical processes like screening and sedimentation. **2. Secondary Treatment:** Employs biological processes to decompose organic matter using microorganisms. **3. Tertiary Treatment:** Provides additional disinfection and removal of nutrients through processes like filtration and chlorination. ### Water Quality for Reuse Treated sewage water can be reused for various purposes, including: - Irrigation - Industrial processes - Non-potable water sources The specific level of treatment required depends on the intended use and applicable regulations. Advanced treatment processes, such as reverse osmosis or ultrafiltration, may be necessary to achieve the required water quality for certain uses.