What is STP and ETP?
The terms "sewage treatment plant" (STP) and "effluent treatment plant" (ETP) are interchangeable. Though they serve different sources and objectives, both are essential in treating various kinds of wastewater.
Sewage treatment plants, or STPs, are primarily responsible for Environmental Protection and managing domestic wastewater produced by homes, businesses, and other similar sources. Sewage, or watery waste from toilets, sinks, showers, and other sanitation facilities, is the main focus of this treatment. To generate treated water appropriate for discharge or reuse, the STP process consists of several phases, including preliminary treatment, primary treatment (removal of solids), secondary treatment (biological treatment to remove organic matter), and occasionally tertiary treatment (further purification).
Conversely, an effluent treatment plant, or ETP, is responsible for managing the industrial wastewater along with Soil Health generated by manufacturing facilities and industries. Industrial effluents need to be treated specifically since they contain a variety of chemicals, poisons, heavy metals, and contaminants. Before discharged water is released into the environment, ETPs use a variety of techniques, including chemical precipitation, filtration, biological treatments, and advanced oxidation, to remove or minimize contaminants.