期刊
BIORESOURCE TECHNOLOGY
卷 202, 期 -, 页码 25-32出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.11.073
关键词
Anaerobic digestion; Chemical composition; Corn straw; Hydrothermal treatment; Methane yield
资金
- National Natural Science Foundation of China [21106145]
- Sichuan Science and Technology Program [2014HH0036]
- Agricultural Science and Technology Innovation Program [CAAS-ASTIP-2015-BIOMA]
Mesophilic-hydrothermal (80-160 degrees C, 30 min)-thermophilic (M-H-T) digestion and control tests of mesophilic (M), thermophilic (T), hydrothermal-mesophilic (H-M), and mesophilic-thermophilic digestion (M-T) of green corn straw were conducted for a 20-day fermentation period. The results indicate that M-H-T is an efficient method to improve methane production. A maximum methane yield of 371.74 mL/g volatile solid was obtained by the M (3 days)-H (140 degrees C)-T (17 days) process, which was 20.44%, 16.55%, 31.44%, and 14.31% higher than the yields of the M, T, 140-M, and M-T processes. The enhanced methane production was attributed to (1) the improved hemicellulose degradation and lignin disorganization; (2) prevention of the degradation of soluble sugar, easily hydrolyzed hemicellulose and cellulose into furfural and methylfurfural; and (3) lack of formation of Maillard reaction products during initial hydrothermal treatment. (C) 2015 Elsevier Ltd. All rights reserved.
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