Best Sewage Treatment Plant in Mahalakshmi Layout
.jpg)
A sewage treatment plant (STP) is a facility designed to treat wastewater generated from residential, commercial, and industrial sources. The primary goal of an STP is to remove contaminants and pollutants from the wastewater before it is discharged back into the environment or reused for various purposes. The wastewater undergoes preliminary treatment, which involves screening to remove large objects, such as debris, plastics, and sticks, and grit removal to eliminate sand, gravel, and other heavy particles. In the primary treatment stage, the wastewater flows into large sedimentation tanks or clarifiers, where suspended solids and heavier organic materials settle to the bottom as sludge. The settled sludge is then removed for further treatment. After primary treatment, the wastewater moves to the secondary treatment stage, which focuses on removing dissolved and colloidal organic matter. The most common secondary treatment method is the activated sludge process, where the wastewater is mixed with bacteria-rich sludge (activated sludge) in aeration tanks. The bacteria consume organic matter, transforming it into stable solids and gases. In some cases, an additional tertiary treatment is employed to further enhance the quality of treated wastewater. This may involve processes such as filtration, disinfection, and nutrient removal (e.g., phosphorus and nitrogen removal) to meet specific discharge or reuse standards.