Sulphide Inhibition Control for Anaerobic Reactors

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Anaerobic digestion using modern reactor technology is the most cost-effective option for the treatment of biodegradable effluents. It is energy efficient because of the conversion of organic matter into methane and environmentally begin because of the low amount of waste sludge's produced.

The process comprises control of H2S concentration in the digester liquor to below toxic levels by selective removal of the gas.

The liquor from an anaerobic reactor is circulated through a stripper where AIR is introduced to remove the H2S. The stripped liquor is reintroduced into the reactor to absorb more H2S, after passing through a buffer tank to eliminate traces of oxygen. The stripper air is purified before exhausting.

Industry classification

Pollution Control



Product type



Waste water processing

Process used : Secondary


Major machinery used

  • High-Rate Reactors for Anaerobic Wastewater treatment: Wastewater containing dissolved organic pollutants. Fixed Film Reactors
  • Fluidized bed and expanded bed reactors
  • Up flow anaerobic Sludge Bed reactors (UASB)
  • Large savings in annual ETP operating expenditure because of elimination of ferric chloride usage
  • Large saving in alkali usage for neutralization of acidic effluent
  • Treated effluent quality is better because of lower TDS level
  • No accumulation of inert sludge in reactor
  • No sludge disposal problems
  • Better performance with respect to COD removal
  • Better performance of downstream activated sludge


Year first Licensed 1998
No. of LIcensees one
Whether in production Installed

For further information please contact

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