An export oriented soap producing unit in the South East Asia is setting up a new production facilities for their quality soap products.


The premises is expected to generate wastewater containing high amount of surfactants with high COD levels. Due to stringent discharge standards, the premises required to meet COD < 100 ppm treated effluent criteria.

  • High levels of Surfactants present in the effluent
  • COD as high as 10000-15000 ppm

THE SOLUTION - Soap industry effluent

Based on our previous experience with similar effluent containing surfactants, a treatment process using DAF and LEVAPOR IFAS process was suggested.

Soap industry effluent treatment scheme:

  • Equalization Tank
  • DAF with chemical dosing
  • LEVAPOR IFAS Reactor
  • Secondary Clarifier
soap industry effluent
Biomass in the LEVAPOR IFAS reactor after start up period


Despite having high COD load and presence of surfactants with other solvents and active detergent products, the plant is achieving desired COD reduction of < 100 ppm at the outlet.

Flow rate
25-40 m3/day
Inlet COD
10000-15000 ppm
Outlet COD
<100 ppm


  • Remarkable process stability despite presence of surfactants
  • Consistent performance achieving COD < 100 ppm at the outlet of biological process
Author Bio

Amit Christian is a MSc graduate in Environment Science from Middlesex University, London, UK. He has been active in the field of water and wastewater treatment since 1998. He specializes in design, engineering, and management of various biological wastewater treatments such as Activated Sludge Process (ASP), Sequencing Batch Reactor (SBR), Moving Bed Bio Reactor (MBBR), Integrated Fixed Film Activated Sludge (IFAS). He has helped various Industrial and Municipal clients in troubleshooting , optimizing their biological wastewater treatment processes to achieve latest Stringent norms for Ammonia Removal.