Biogas Plants
Biogas plants for cooking is one of the most common applications. The fuel from the Biogas plant burns as a clean fuel and has the ability to generate heat for cooking purposes. Every cubic meter of biogas has an average calorific value of about 20 Mega Joules. This is equivalent to the calorific value of about 0.43Kg of LPG (Liquified petroleum gas). Cooking is one of the most widely used applications of biogas. The gas leaves no residue after it burns which makes it completely usable.
Floating-Drum Biogas Plants
Common household/community plant design in India.
Characteristics
Steel or plastic gas-holder drums move up/down.
Constant gas pressure.
KVIC Model(Khadi and Village Industries Commission)
Most suited for Small farms, educational institutions
Fixed-Dome Biogas Plants
Most commonly in rural setups
Characteristics
Underground digester with a fixed masonry dome.
Gas pressure varies with the volume of gas produced.
Low-cost, long life, minimal maintenance.
Most Suitable for Household/ small community plants
Advantages of Biogas plant
Burns with a clean flame and leaves no residue similar to LPG
Zero smoke and hence non hazardous
Odorless gas once H2S is removed
Economically cheaper compared to LPG or firewood.
Reduces possible methane emissions arising from unscientific dumping
Produces slurry which is rich in organic contents and micro nutrients