TY - JOUR
T1 - Improved biogas production from food waste by co-digestion with de-oiled grease trap waste
AU - Wu, Li Jie
AU - Kobayashi, Takuro
AU - Kuramochi, Hidetoshi
AU - Li, Yu You
AU - Xu, Kai Qin
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - The objective of this study was to assess the feasibility of co-digesting food waste (FW) and de-oiled grease trap waste (GTW) to improve the biogas production. A lab-scale mesophilic digester (MD), a temperature-phased anaerobic digester (TPAD) and a TPAD with recycling (TPAD-R) were synchronously operated under mono-digestion (FW) and co-digestion (FW. +. de-oiled GTW). Co-digestion increased the biogas yield by 19% in the MD and TPAD-R, with a biogas yield of 0.60. L/g VS added. Specific methanogenic activity in the TPAD-R was much higher than that in the MD. In addition to methane, hydrogen at a yield of approximately 1. mol/mol hexose was produced in the TPAD-R. Alkalinity was consumed more in the co-digestion than in mono-digestion. Co-digestion resulted in more lipid accumulation in each digester. The MD favored the degradation of lipid and conversion of long-chain fatty acids more than the TPAD and TPAD-R.
AB - The objective of this study was to assess the feasibility of co-digesting food waste (FW) and de-oiled grease trap waste (GTW) to improve the biogas production. A lab-scale mesophilic digester (MD), a temperature-phased anaerobic digester (TPAD) and a TPAD with recycling (TPAD-R) were synchronously operated under mono-digestion (FW) and co-digestion (FW. +. de-oiled GTW). Co-digestion increased the biogas yield by 19% in the MD and TPAD-R, with a biogas yield of 0.60. L/g VS added. Specific methanogenic activity in the TPAD-R was much higher than that in the MD. In addition to methane, hydrogen at a yield of approximately 1. mol/mol hexose was produced in the TPAD-R. Alkalinity was consumed more in the co-digestion than in mono-digestion. Co-digestion resulted in more lipid accumulation in each digester. The MD favored the degradation of lipid and conversion of long-chain fatty acids more than the TPAD and TPAD-R.
KW - Anaerobic digestion
KW - Food waste (FW)
KW - Grease trap waste (GTW)
KW - Long-chain fatty acid (LCFA)
KW - Temperature-phased anaerobic digestion (TPAD)
UR - http://www.scopus.com/inward/record.url?scp=84949309860&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84949309860&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2015.11.061
DO - 10.1016/j.biortech.2015.11.061
M3 - Article
C2 - 26679046
AN - SCOPUS:84949309860
SN - 0960-8524
VL - 201
SP - 237
EP - 244
JO - Bioresource Technology
JF - Bioresource Technology
ER -
