TY - JOUR
T1 - Fungal pretreatment of unsterilized yard trimmings for enhanced methane production by solid-state anaerobic digestion
AU - Zhao, Jia
AU - Ge, Xumeng
AU - Vasco-Correa, Juliana
AU - Li, Yebo
N1 - Funding Information:
This project was funded by the USDA NIFA Biomass Research and Development Initiative Program (Award No. 2012-10008-20302 ). The authors would like to thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2014/4
Y1 - 2014/4
N2 - Fungal pretreatment is an environmentally friendly process that has been widely studied to improve the digestibility of lignocellulosic biomass. However, sterilization of feedstocks, a costly process, is generally required prior to the fungal pretreatment. In this study, fungal pretreatment of unsterilized yard trimmings using yard trimmings pre-colonized with Ceriporiopsis subvermispora as an inoculum was investigated. Degradation of lignin, cellulose, hemicellulose, and dry matter in yard trimmings during 30. days of fungal pretreatment using different inoculum/substrate ratios (1:19, 1:9 and 1:4) was 14.8-20.2%, 8.1-15.4%, 20.7-27.8%, and 9.8-16.2%, respectively. Methane yields of 34.9-44.6. L/kg volatile solids were achieved during solid-state anaerobic digestion (SS-AD) of the pretreated yard trimmings, which were comparable to those obtained by using the traditional method requiring feedstock sterilization. The technology developed in this study can save about 501-789. kJ/kg of dry yard trimmings processed, which is about half of the total biogas energy produced by SS-AD.
AB - Fungal pretreatment is an environmentally friendly process that has been widely studied to improve the digestibility of lignocellulosic biomass. However, sterilization of feedstocks, a costly process, is generally required prior to the fungal pretreatment. In this study, fungal pretreatment of unsterilized yard trimmings using yard trimmings pre-colonized with Ceriporiopsis subvermispora as an inoculum was investigated. Degradation of lignin, cellulose, hemicellulose, and dry matter in yard trimmings during 30. days of fungal pretreatment using different inoculum/substrate ratios (1:19, 1:9 and 1:4) was 14.8-20.2%, 8.1-15.4%, 20.7-27.8%, and 9.8-16.2%, respectively. Methane yields of 34.9-44.6. L/kg volatile solids were achieved during solid-state anaerobic digestion (SS-AD) of the pretreated yard trimmings, which were comparable to those obtained by using the traditional method requiring feedstock sterilization. The technology developed in this study can save about 501-789. kJ/kg of dry yard trimmings processed, which is about half of the total biogas energy produced by SS-AD.
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U2 - 10.1016/j.biortech.2014.02.029
DO - 10.1016/j.biortech.2014.02.029
M3 - Article
C2 - 24607461
AN - SCOPUS:84895770931
SN - 0960-8524
VL - 158
SP - 248
EP - 252
JO - Bioresource technology
JF - Bioresource technology
ER -
