This research project evaluated biogas production using anaerobic co-digestion of pig manure and elephant
grass silage in large scale to delivered transportation directly for cars. Anaerobic co-digestion
was estimated in three full-scale continuously stirred tank reactors (CSTRs) at 40 C. In the form of compressed
bio-methane gas (CBG) production was 14,400 m3
/day (CH4 60–70%) amount of CBG was
9600 m3
/day. The procedure was enhanced by using molecular sieve, activated carbon for removal of
moisture and CO2 membrane H2S and CO2 respectively. The results were demonstrated the amount of
CO2, H2S gas was reduced along with CH4 was improved up to 90% by volume and compressed to
250 bar tank pressure gauge to the fuel for cars. The CBG production, methane gas improvement and performance
were evaluated before entering the delivered systems according to the energy standards. The
production of CBG is advantageous to strengthen the Thailand biogas market.