Common Effluent Treatment Plant
Also called: CETP · Topic: Environment and Sustainable Development · NCERT: Beyond NCERT
Meaning
A Common Effluent Treatment Plant (CETP) is one shared plant that cleans the wastewater of many industrial units together. Effluent means the dirty liquid waste a factory lets out. Small units often cannot pay for their own treatment plant, so they release untreated wastewater into rivers and soil. A CETP pools their wastewater, treats it to the required standard and then releases it. Because the units share the cost, it is cheaper for each of them, and it is easier for the Pollution Control Boards to check one plant than hundreds of scattered units. This is how the polluter pays principle works in practice: the polluting firms together pay for the clean-up.
Example
The BHAVYA Rasayan scheme was approved in July 2026 with ₹3,030 crore for FY 2026–27 to FY 2030–31. It will build 3 chemical parks, and each park must have a CETP for all its units, along with a TSDF and solvent recovery units. The Petroleum, Chemicals and Petrochemicals Investment Regions (PCPIRs), started under the 2007 policy, also list CETPs as shared infrastructure.
Don't confuse with
- Sewage treatment plant (STP): it treats household sewage from towns. A CETP treats industrial wastewater, which can contain chemicals and toxins.
- Treatment, Storage and Disposal Facility (TSDF): it handles hazardous solid waste and sludge. A CETP treats liquid waste.