ETP or effluent treatment plant is used to treat the industrial waste water.
Influent: Untreated industrial waste water.
Effluent: treated industrial waste water.
Sludge: solid part separated from waste water by ETP
1. o clean industry effluent and recycle it for further use. To reduce the usage of fresh/potable water in Industries. To cut expenditure on water procurement. To preserve natural environment against pollution To meet the Standards for emission or discharge of environmental pollutants To safeguard environment against pollution and contribute in sustainable development. Need of ETP
Oil & grease trap: To remove floatable oil and grease from raw effluent.
Primary treatment: Includes chemical treatment (coagulation, flocculation, neutralization) and solid-liquid separation for removal of suspended solids.
Secondary Treatment: Includes biological treatment for reduction of BOD/COD and solid-liquid separation. Biological treatment can be aerobic or anaerobic depends on quality of raw effluent. Aerobic- ASP (Activated Sludge Process), MBBR/FAB (Moving Bed Bioreactor/ Fluidized Aerated Bioreactor), SAFF (Submerged Aerated Fixed Film Bioreactor), MBR (Membrane Bioreactor) Anaerobic- UASB (Up-flow anaerobic Sludge Blanket Reactor)
Tertiary treatment: Sand and carbon filtration for removal of suspended solids and organic material. Ultra-filtration and Reverse Osmosis are the advanced technologies to be implemented for zero-discharge system.