Odour Control


Biofiltration uses micro-organisms to remove undesirable components from industrial waste gases. Waste gases are forced though filter material on which micro-organisms are immobilized. After absorption in the filter material, micro-organisms break down the polluting components and transform them into harmless products such as carbon dioxide, mineral salts or acids and water.

Industry classification

Pollution control



Product type



Waste water processing

Process used : Secondary


Major machinery used

RRL provides complete technology package for odour control-odour intensity measurement, identification of odour compounds, pilot study, desing of ventilating system using CFD modeling for air flows, process design, engineering and commissioning of biofiltration unit.


Year first Licensed 2000
No. of LIcensees one
Whether in production Under implementation

Economic Information

Minimum Economic size Odour threshold (mg / m3)
Amonia 2.6X102
Butyric Acid 1X104
Chlorine 2.0X102
Petrol (Heavy) 150
Hydrogen sulphide 1.5X103
Ethyl Mercaptan 4X105
Vanilllin 2X107
One gram of vanillin distributed uniformly in air up to a height of 100m can be smelt 5 Km away!
Industrial emission of odour  
Meat and fish processing Cyctine.>H2S, Methyl mercaptan
Cooking smells Dimethyl disulphite furan, pyridine
Fruit warehousing Ethylene
Swage tratment H2S
Refineries H2S, methyl mercaptan, acrolein, Methionine BTEX

For further information please contact

Regional Research Laboratory (RRL)
Industrial Estate P.O.,
Thiruvananthapuram- 695 019
Kerala, India