Journal
BIORESOURCE TECHNOLOGY
Volume 124, Issue -, Pages 379-386Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.08.051
Keywords
Solid-state anaerobic digestion; Biogas; Corn stover; Switchgrass; Lignocellulosic biomass
Funding
- Ohio Agricultural Research and Development Center (OARDC) SEEDS Program [2008-043]
- Ohio Agricultural Research and Development Center (OARDC) Ohio Third Frontier Program [10-059]
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Lignocellulosic biomass feedstocks (switchgrass, corn stover, wheat straw, yard waste, leaves, waste paper, maple, and pine) were evaluated for methane production under liquid anaerobic digestion (L-AD) and solid-state anaerobic digestion (SS-AD). No significant difference in methane yield between L-AD and SS-AD, except for waste paper and pine, were found. However, the volumetric productivity was 2- to 7-fold greater in the SS-AD system compared with the L-AD system, except for paper. Methane yields from corn stover, wheat straw, and switchgrass were 2-5 times higher than those from yard waste, maple, and pine biomass. Waste paper had a methane yield of only 15 L/kg VS caused by souring during SS-AD due to organic overloading. Pine also had very low biogas yield of 17 L/kg VS, indicating the need for pretreatment prior to SS-AD. The findings of this study can guide future studies to improve the efficiency and stability of SS-AD of lignocellulosic biomass. (C) 2012 Elsevier Ltd. All rights reserved.
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