Anaerobic digestion is a bio-chemical technology used for
the treatment of organic wastes and the production of
biogas, which can be used as a fuel for heating or cogeneration
of electricity and heat [1]. Bio-gas has globally
remained a renewable energy source derived from plants
that use solar energy during the process of photosynthesis.
Being a source of renewable natural gas, it has been adopted
as one of the best alternatives for fossil fuels after 1970’s
world energy crisis. Bio-gas is a colourless, flammable gas
produced via anaerobic digestion of animal, plant, human,
industrial and municipal wastes amongst others, to give
mainly methane (50-70%), carbon dioxide (20-40%) and
traces of other gases such as nitrogen, hydrogen, ammonia,
hydrogen sulphide, water vapour etc. [2]. Bio-gas
production is mainly based on the bio-chemical process.