TY - JOUR
T1 - Effect of storage time and temperature on hydrogen fermentation of food waste
AU - Im, Seongwon
AU - Lee, Mo Kwon
AU - Yun, Yeo Myeong
AU - Cho, Si Kyung
AU - Kim, Dong Hoon
N1 - Publisher Copyright:
© 2019 Hydrogen Energy Publications LLC
PY - 2020/2/4
Y1 - 2020/2/4
N2 - Practically, before being fed to the treatment plant, food waste (FW) is stored for up to a week in a storage tank under ambient temperature condition, which would have an impact on the bioenergy yield. In the present work, FW was stored at different temperatures (5 °C, 20 °C, and 35 °C) for 0 d, 1 d, and 2 d, and it was used as a feedstock for mesophilic H2 fermentation. H2 production curves were divided by three groups, finally attaining 1.7–1.8 mol H2/mol hexoseadded, 1.4–1.5 mol H2/mol hexoseadded, and 1.2 mol H2/mol hexoseadded, achieved from the (fresh, FW stored at 5 °C), (FW stored at 20 °C, and 35 °C for 1 d), and (FW stored at 35 °C for 2 d), respectively. The different performance was attributed to the growth of indigenous lactic acid bacteria such as Lactobacillus and Weissella during storage under high temperature condition. In addition, it was found that the activity of homoacetogenic reaction (R17, 4H2 + CO2 → Acetate) calculated by establishing metabolic flux balance was different depending on the H2 production performance. The flux of R17 ranged 0.03–0.06 under low H2 yield achieved conditions, while it increased to 0.10–0.17 those showing low H2 yields.
AB - Practically, before being fed to the treatment plant, food waste (FW) is stored for up to a week in a storage tank under ambient temperature condition, which would have an impact on the bioenergy yield. In the present work, FW was stored at different temperatures (5 °C, 20 °C, and 35 °C) for 0 d, 1 d, and 2 d, and it was used as a feedstock for mesophilic H2 fermentation. H2 production curves were divided by three groups, finally attaining 1.7–1.8 mol H2/mol hexoseadded, 1.4–1.5 mol H2/mol hexoseadded, and 1.2 mol H2/mol hexoseadded, achieved from the (fresh, FW stored at 5 °C), (FW stored at 20 °C, and 35 °C for 1 d), and (FW stored at 35 °C for 2 d), respectively. The different performance was attributed to the growth of indigenous lactic acid bacteria such as Lactobacillus and Weissella during storage under high temperature condition. In addition, it was found that the activity of homoacetogenic reaction (R17, 4H2 + CO2 → Acetate) calculated by establishing metabolic flux balance was different depending on the H2 production performance. The flux of R17 ranged 0.03–0.06 under low H2 yield achieved conditions, while it increased to 0.10–0.17 those showing low H2 yields.
KW - Food waste
KW - H fermentation
KW - Lactic acid bacteria
KW - Metabolic flux balance
KW - Storage condition
UR - http://www.scopus.com/inward/record.url?scp=85069694557&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2019.06.215
DO - 10.1016/j.ijhydene.2019.06.215
M3 - Article
AN - SCOPUS:85069694557
SN - 0360-3199
VL - 45
SP - 3769
EP - 3775
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 6
ER -