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 m 3/day (CH60–70%) amount of CBG was9600 m34/day. The procedure was enhanced by using molecular sieve, activated carbon for removal of moisture and CO2membrane H2S and COrespectively. The results were demonstrated the amount ofCO2,H2S gas was reduced along with CH2 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.