Effluent Treatment Plant
ETP (Effluent Treatment Plant) is a process of treating the industrial waste water for its reuse or safe disposal to the environment.
Stages of ETP (Effluent Treatment Plant)
- Preliminary treatment: It involves physical processes like screening, sedimentation, filtration, clarification etc. The objective of this is to remove as maximum possible solid matter before taking the effluent for further treatment.
- Primary treatment: This stage employs techniques to remove the solid waste and organic matter. chemicals are added to break down any solid and chemical waste. This is done by chemical coagulation, chemical precipitation or the addition of sodium carbonate or hydrochloric acid in order to control the pH levels.
- Secondary treatment: Here the suspended particles and any biodegradable matter are removed with the help of many chemical processes as well as biological processes.
- Tertiary treatment: This stage involves such treatment which uses a combination of all three- physical, chemical and biological processes to remove any final traces of solids or contaminants from the industrial effluent.