BioChem - DOS

Two-stage thermophilic fermentation and mesophilic methanogenic process for biohythane production from palm oil mill effluent with methanogenic effluent recirculation for pH control

International journal of hydrogen energy

O-Thong, S.; Suksong, W.; Promnuan, K.; Thipmunee, M.; Mamimin, C.; Prasertsan, P.

Two-stage thermophilic fermentation and mesophilic methanogenic process with methanogenic effluent recirculation to hydrogen reactor for biohythane production from palm oil mill effluent (POME) was investigated. Maximum hydrogen (4.1 L H<SUB>2</SUB>/L-POME) and methane production (16.6 L CH<SUB>4</SUB>/L-POME) from POME in batch tests were achieved at 30% recirculation rate of methanogenic effluent. Continuous hydrogen production of without and with recirculation phase was 2.2 and 3.8 L H<SUB>2</SUB>/L-POME, respectively. Continuous methane production of without and with recirculation phase was 12.2 and 14 L CH<SUB>4</SUB>/L-POME, respectively. Both reactor effluents were effective to keep at optimal pH with 2 times increasing in hydrogen production. The hydrogen and methane yield were 135 mL H<SUB>2</SUB>/gVS and 414 mL CH<SUB>4</SUB>/gVS, respectively. Biohythane gas composition was composed 13.3% of hydrogen, 54.4% of methane and 32.2% carbon dioxide. Two-stage process with methanogenic effluent recirculation flavored Thermoanaerobacterium sp. in the hydrogen reactor and efficiently for energy recovery from POME.

2016

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

41

46

pp.21702-21712

10.1016/j.ijhydene.2016.07.095

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART76823044

Hydrogen and methane; Palm oil mill effluent; Thermophilic fermentation; Two-stage anaerobic digestion; Methanogenic effluent