It mainly comprises of hydro-carbon which is combustible and can produce heat and energy when burnt. Bio-gas is produced through a bio-chemical process in which certain types of bacteria convert the biological wastes into useful bio-gas. Since the useful gas originates from biological process, it has been termed as bio-gas. Methane gas is the main constituent of biogas.
The process of bio-gas production is anaerobic in nature and takes place in two stages.
Although, cattle dung has been recognized as the chief raw material for bio-gas plants, other materials like night-soil, poultry litter and agricultural wastes can also be used.
I have been using Biogas plant since 10 months. My Kitchen waste is managed, in return i get Bio-Gas as a Fuel for cooking Food & Liquid Compost to grow backyard garden, it saves my LPG consumption by half. I recommend every household to adopt Bio-Gas Plant for manage their Kitchen waste.