This standard provides guidelines for the planning, siting, design, construction, operation, and maintenance of Common Effluent Treatment Plants (CETPs). It is intended for treating combined effluents from a cluster of industries, making treatment more economically and technically feasible.
Provides guidelines for the planning, design, operation, and maintenance of common effluent treatment plants (CETP) for industrial estates.
Quick Reference Values
Recommended minimum distance from residential area500 m
Typical peak to average flow factor for design2.5 to 3.0
Typical freeboard in equalization tank0.5 m
Typical detention time in primary clarifier2.0 to 2.5 hours
Typical hydraulic retention time (HRT) for activated sludge6 to 10 hours
Practical Notes
While this IS code provides a foundational framework, it is crucial to consult current guidelines from the Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs) which are often more stringent and specific.
A comprehensive treatability study on a representative composite sample of wastewater is essential before finalizing the treatment process and unit sizing.
The financial viability and management structure (e.g., a Special Purpose Vehicle) are as critical to the success of a CETP as the technical design.