Recovering hydrogen production performance of upflow anaerobic sludge blanket reactor (UASBR) fed with galactose via repeated heat treatment strategy.
This study evaluated the effect of repeated heat treatment towards the enhancement of hydrogen fermentation from galactose in an upflow anaerobic sludge blanket reactor with the hydraulic retention time of 6h and the operation temperature of 37°C. The hydrogen production rate (HPR) and hydrogen yield (HY) gradually increased up to 9.1L/L/d and 1.1mol/mol galactose, respectively, until the 33rd day of operation. When heat treatment at 80°C for 30min was applied, hydrogen production performance was enhanced by 37% with the enrichment of hydrogen producing bacteria population. The HPR and HY were achieved at 12.5L/L/d and 1.5mol/mol hexose, respectively, during further 30 cycles of reactor operation. The repeated heat treatment would be a viable strategy to warrant reliable continuous hydrogen production using mixed culture.
Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan.
Periyasamy
P
Sivagurunathan
Department of Civil Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Sustainable Environmental Process Research Institute, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
Parthiban
P
Anburajan
Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Sustainable Environmental Process Research Institute, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
Gopalakrishnan
G
Kumar
Sustainable Environmental Process Research Institute, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Department of Civil, Environmental and Architectural Engineering, Korea University, Anam-Dong, Seoul 02841, Republic of Korea.
Jong-Hun
JH
Park
Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Sustainable Environmental Process Research Institute, Daegu University, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea. Electronic address: sanghkim1@daegu.ac.kr.
Sang-Hyoun
SH
Kim
D000693:Anaerobiosis; D001421:Bacteria, Anaerobic; D019149:Bioreactors; D005690:Galactose; D006358:Hot Temperature; D006859:Hydrogen; D012722:Sewage
D012722:Sewage; D006859:Hydrogen; D005690:Galactose
Galactose; High-rate; Hybrid immobilized cells; Hydrogen; UASBR