Biogas Purification :

India produces large quantities of organic waste ( 0.17-0.7 kg/capita/day). Anaerobic digestion of the organic waste produces raw biogas containing majorly CH 4 and CO 2.

The Acid gases (CO 2 , H 2 S) need to be removed from raw biogas. In India, this is done by conventional technologies.

Membrane technology though has advantages over conventional ones,

• Physical method of separation
• No need of high quantity of water for scrubbing
• No need of chemicals/adsorbents; No frequent replacement cost
• Low Capex and Opex
• Compressed biomethane as outlet, can be directly used for refilling and distribution