Biotrickling and carbon polishing for Bidkin Industrial Area
For the wastewater treatment plant at Bidkin Industrial Area in Aurangabad, Ipec supplied an odour control unit for mixed sewage and industrial effluent treatment. The system combines biological treatment with activated carbon polishing in one GRP vessel.
Challenge
The wastewater treatment plant was designed to treat both sewage and common industrial effluent. Because the nature of these streams can vary over time, the odour control system needed to handle different odour components and operating conditions.
The source explicitly links the selected treatment approach to the variability of the sewage and effluent composition.
Solution
Ipec provided an odour control unit with a flow of 11,000 m³/h. The system consists of two fans in duty-standby configuration and a GRP vessel combining a biotrickling filter and activated carbon step.
In the biotrickling filter, water moistens the biomedia on which bacteria grow. H₂S-removing bacteria operate in more acidic conditions, while heterotrophic bacteria in the upper bed can remove volatile organic compounds such as skatole and fatty acids.
A nutrient dosing system supports the biological culture when needed, and a pH sensor at the drain outlet monitors the acidity of the drain water. As a polishing step, water-regenerable catalytic activated carbon removes remaining traces of H₂S and other odour components.
Result
The combined biological and activated carbon design provides a robust treatment concept for a site where odour composition may vary. The activated carbon polishing step adds a final treatment barrier after biological removal.
