TY - JOUR
T1 - Development of a novel three-stage fermentation system converting food waste to hydrogen and methane
AU - Kim, Dong Hoon
AU - Kim, Mi Sun
PY - 2013/1
Y1 - 2013/1
N2 - In this study, a novel three-stage (lactate-+photo-H2+CH4) fermentation system was developed, which converts food waste to H2 and CH4, with an emphasis on achieving high H2 yield. The system begins by first fermenting food waste to lactate, rather than acetate and butyrate, using indigenous lactic acid bacteria. Lactate fermentation effluent was then centrifuged, and the supernatant was used for H2 production by photo-fermentation, while the residue was used for CH4 production by anaerobic digestion. Overall, via the three-stage fermentation system, 41% and 37% of the energy content in the food waste was converted to H2 and CH4, respectively, corresponding to the electrical energy yield of 1146MJ/ton-food waste, which is 1.4 times higher value than that of previous two-stage dark (H2+CH4) fermentation system. The H2 yield based on hexose input was 8.35mol H2/mol hexoseadded, the highest value ever reported from actual organic waste.
AB - In this study, a novel three-stage (lactate-+photo-H2+CH4) fermentation system was developed, which converts food waste to H2 and CH4, with an emphasis on achieving high H2 yield. The system begins by first fermenting food waste to lactate, rather than acetate and butyrate, using indigenous lactic acid bacteria. Lactate fermentation effluent was then centrifuged, and the supernatant was used for H2 production by photo-fermentation, while the residue was used for CH4 production by anaerobic digestion. Overall, via the three-stage fermentation system, 41% and 37% of the energy content in the food waste was converted to H2 and CH4, respectively, corresponding to the electrical energy yield of 1146MJ/ton-food waste, which is 1.4 times higher value than that of previous two-stage dark (H2+CH4) fermentation system. The H2 yield based on hexose input was 8.35mol H2/mol hexoseadded, the highest value ever reported from actual organic waste.
KW - Food waste
KW - Hydrogen
KW - Lactate
KW - Methane
KW - Photo-fermentation
UR - http://www.scopus.com/inward/record.url?scp=84868251965&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2012.09.088
DO - 10.1016/j.biortech.2012.09.088
M3 - Article
C2 - 23131651
AN - SCOPUS:84868251965
SN - 0960-8524
VL - 127
SP - 267
EP - 274
JO - Bioresource Technology
JF - Bioresource Technology
ER -
