Journal
BIORESOURCE TECHNOLOGY
Volume 289, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121646
Keywords
Corn stover; Hydrothermal pretreatment (HP); HP severity; Anaerobic digestion (AD); Biogas
Funding
- National Thirteen Five year Key Research & Development Program of Ministry of Science and Technology of the People's Republic of China [2016YFD0501402]
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The pretreatment characteristics and anaerobic digestion (AD) performance of corn stover were investigated at different hydrothermal pretreatment (HP) severity levels. The pretreatment of corn stover with and without ammonia was performed at different temperatures (100, 150, and 200 degrees C) and with a holding time of 5-30 mins. Results showed that after HP, the highest volatile fatty acid (VFAs) concentration was 10533.94 mg/L at a HP severity of 7.27, which was 1.72-3.35 times greater than those of others HP severity levels. Similarly, the highest removal rates of hemicellulose and lignin were 95.41% and 13.85% for HP severity levels of 6.81 and 1.98, respectively. The maximum biogas and methane increasing yield at 100 degrees C holding 30 min without ammonia were 16.26% and 22.74% greater than that of the untreated, respectively. These results suggest that an appropriate HP intensity can promote biogas production.
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