TY - JOUR
T1 - Towards utmost bioenergy conversion efficiency of food waste
T2 - Pretreatment, co-digestion, and reactor type
AU - Ma, Chaonan
AU - Liu, Jianyong
AU - Ye, Min
AU - Zou, Lianpei
AU - Qian, Guangren
AU - Li, Yu You
N1 - Funding Information:
This study was financially supported by the National Natural Science Foundation of China ( 51778352 , 51578329 ), the research project from the Science and Technology Commission of Shanghai Municipality ( 16010500200 , 18230710900 ), and Program for Innovative Research Team in University ( IRT13078 ).
PY - 2018/7
Y1 - 2018/7
N2 - Food waste (FW), which contains a large amount of easily biodegradable organic matter, has great potential for methane production using anaerobic digestion (AD). However, the bioenergy conversion efficiency in this method is not ideal because FW has a long hydraulic retention time (HRT) of > 20 days, low organic loading rate (OLR) of 1–6 g VS /L.d and low bioenergy conversion rate 40–70%. To improve the efficiency of bioenergy conversion, pretreatment technologies, co-digestion with other organic wastes and the effect of reactor types are reviewed and discussed. Enzymatic pretreatment and co-digestion of FW with landfill leachate are preferable for hydrolysis of organic solids, enhancement of methane production and stability improvement of the AD system. Based on the discussion and our preliminary experiment results, the feasibility of FW treatment using a third generation anaerobic reactor is proposed and analyzed. If the proposed concept can be applied practically in the future, more than 90% of the organic matter in FW could be recovered as bioenergy with an OLR greater than 20 kg COD/m3 d.
AB - Food waste (FW), which contains a large amount of easily biodegradable organic matter, has great potential for methane production using anaerobic digestion (AD). However, the bioenergy conversion efficiency in this method is not ideal because FW has a long hydraulic retention time (HRT) of > 20 days, low organic loading rate (OLR) of 1–6 g VS /L.d and low bioenergy conversion rate 40–70%. To improve the efficiency of bioenergy conversion, pretreatment technologies, co-digestion with other organic wastes and the effect of reactor types are reviewed and discussed. Enzymatic pretreatment and co-digestion of FW with landfill leachate are preferable for hydrolysis of organic solids, enhancement of methane production and stability improvement of the AD system. Based on the discussion and our preliminary experiment results, the feasibility of FW treatment using a third generation anaerobic reactor is proposed and analyzed. If the proposed concept can be applied practically in the future, more than 90% of the organic matter in FW could be recovered as bioenergy with an OLR greater than 20 kg COD/m3 d.
KW - Bioenergy conversion
KW - Co-digestion
KW - Food waste
KW - Pretreatment
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U2 - 10.1016/j.rser.2018.03.110
DO - 10.1016/j.rser.2018.03.110
M3 - Review article
AN - SCOPUS:85045412289
SN - 1364-0321
VL - 90
SP - 700
EP - 709
JO - Renewable and Sustainable Energy Reviews
JF - Renewable and Sustainable Energy Reviews
ER -
