All the as mentioned biogas purification and CH4 upgradation processes
are well studied and associated with their own advantage and
disadvantages. In spite, it is necessary to find out some non expensive
and viable biogas purification methods, which could be applied
in small farm sectors in rural area. Considering these issues, the aim
of this project is to use commercially available solid CaO, CaO solution
and activated carbon for removing carbon dioxide from biogas generated
by anaerobic co-digestion process. We report the continuous
flow methods for nonstop purification of raw biogas. The cheap and
inexpensive nature of both the chemical agents suggests the possible
utilization of raw biogas through purification in small scale plants.