TY - JOUR
T1 - Hydrogen production using an anaerobic baffled reactor - Mass balances for pathway analysis and gas composition profiles
AU - Jürgensen, Lars
AU - Ehimen, Ehiaze Augustine
AU - Born, Jens
AU - Holm-Nielsen, Jens Bo
PY - 2015/9/28
Y1 - 2015/9/28
N2 - This study investigated pathways for anaerobic hydrogen production from biomass at low pH values, also known as dark fermentation. A 200 l bench scale anaerobic baffled reactor with four internal compartments was used for hydrogen production from wheat starch. The liquid fermentation products and hydrodynamic characteristics were analyzed using high performance liquid chromatography, tracer studies, and gas analysis. A mean residence time of 29 h and a feed strength of 4 gCOD/l resulted in a total gas production of 230 l/d containing 42% hydrogen and 11% methane. The gas collected from the different compartments highly differed in composition showing a partial phase separation, with maximum H2 concentrations of up to 60% observed in the first compartment. 49% and 44% of the total H2 produced were derived during the formation of acetic and butyric acid respectively. Just 8% of the H2 was produced during propionic acid synthesis. Concentrations up to 1 g/l lactic acid built by the bifidum pathway was also observed.
AB - This study investigated pathways for anaerobic hydrogen production from biomass at low pH values, also known as dark fermentation. A 200 l bench scale anaerobic baffled reactor with four internal compartments was used for hydrogen production from wheat starch. The liquid fermentation products and hydrodynamic characteristics were analyzed using high performance liquid chromatography, tracer studies, and gas analysis. A mean residence time of 29 h and a feed strength of 4 gCOD/l resulted in a total gas production of 230 l/d containing 42% hydrogen and 11% methane. The gas collected from the different compartments highly differed in composition showing a partial phase separation, with maximum H2 concentrations of up to 60% observed in the first compartment. 49% and 44% of the total H2 produced were derived during the formation of acetic and butyric acid respectively. Just 8% of the H2 was produced during propionic acid synthesis. Concentrations up to 1 g/l lactic acid built by the bifidum pathway was also observed.
KW - Anaerobic baffled reactor (ABR)
KW - Anaerobic digestion
KW - Biogas
KW - Hydrogen
KW - Pathways
UR - http://www.scopus.com/inward/record.url?scp=84940434953&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2015.07.068
DO - 10.1016/j.ijhydene.2015.07.068
M3 - Journal article
AN - SCOPUS:84940434953
SN - 0360-3199
VL - 40
SP - 12154
EP - 12161
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 36
ER -