Abstract
The aim of this work was to examine the improvement of anaerobic biodegradability of organic fractions of poplar leaf from codigestion with swine manure (SM), thus biogas yield and energy recovery. When poplar leaf was used as a sole substrate, the cumulative biogas yield was low, about 163 mL (g volatile solid (VS))−1 after 45 days of digestion with a substrate/inoculum ratio of 2.5 and a total solid (TS) of 22 %. Under the same condition, the cumulative biogas yield of poplar leaf reached 321 mL (g VS)−1 when SM/poplar leaf ratio was 2:5 (based on VS). The SM/poplar leaf ratio can determine C/N ratio of the cosubstrate and thus has significant influence on biogas yield. When the SM/poplar leaf ratio was 2:5, C/N ratio was calculated to be 27.02, and the biogas yield in 45 days of digestion was the highest. The semi-continuous digestion of poplar leaf was carried out with the organic loading rate of 1.25 and 1.88 g VS day−1. The average daily biogas yield was 230.2 mL (g VS)−1 and 208.4 mL (g VS)−1. The composition analysis revealed that cellulose and hemicellulose contributed to the biogas production.
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The authors acknowledge the financial support from Hi-Tech Research and Development Program of China (863 Program, 2012AA021401).
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Wangliang, L., Zhikai, Z. & Guangwen, X. Enhancement of Biogas Yield of Poplar Leaf by High-Solid Codigestion with Swine Manure. Appl Biochem Biotechnol 179, 270–282 (2016). https://doi.org/10.1007/s12010-016-1992-0
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DOI: https://doi.org/10.1007/s12010-016-1992-0