期刊
BIOMASS & BIOENERGY
卷 32, 期 6, 页码 541-550出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2007.11.013
关键词
anaerobic digestion; methane production; energy crops; crop residues; harvest time; maturity stage
The purpose of the study was to screen potential boreal energy crops and crop residues for their suitability in methane production and to investigate the effect of harvest time on the methane production potential of different crops. The specific methane yields of crops, determined in 100-200 d methane potential assays, varied from 0.17 to 0.49 m(3) CH4 kg(-1). VSadded (volatile solids added) and from 25 to 260 m(3)CH(4) t(ww)(-1) (tonnes of wet weight). Jerusalem artichoke, timothy-clover grass and reed canary grass gave the highest potential methane yields of 2900-5400 m(3)CH(4) ha(-1), corresponding to a gross energy yield of 28-53 MWh ha(-1) and ca. 40,000-60,000 km ha(-1) in passenger car transport. The effect of harvest time on specific methane yields per VS of crops varied a lot, whereas the specific methane yields per t(ww) increased with most crops as the crops matured. (C) 2007 Elsevier Ltd. All rights reserved.
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