A Domestic Sewage Treatment Plant (DSTP) is a system designed to treat wastewater from household sources, such as toilets, sinks, showers, and laundry. The purpose of a DSTP is to reduce the level of pollutants and contaminants in the wastewater before it is released into the environment, such as a river or lake. The typical process for a DSTP includes screening, primary treatment, secondary treatment, and tertiary treatment. Screening is the first step in the process and involves removing any large solid objects from the wastewater. Primary treatment involves settling out the solids from the wastewater, while secondary treatment involves using biological processes to break down the organic matter and remove additional pollutants. Tertiary treatment is the final step, which may involve additional filtration or the use of ultraviolet light to further reduce pollutant levels.
It is designed to treat wastewater from domestic sources, such as toilets, showers, sinks, and washing machines. The treatment plant generally includes a physical, biological, and chemical treatment process to remove pollutants from the wastewater before it is discharged into a nearby water body. The treatment process may vary depending on the type of pollutant, but typically includes screens to remove large debris, aeration to promote the growth of beneficial microorganisms, and sedimentation to settle out suspended solids. Depending on the type of system, additional treatment steps may include chemical precipitation, filtration, and disinfection.