Anaerobic digestion of maize focusing on variety, harvest time and pretreatment

被引:85
作者
Bruni, Emiliano [1 ]
Jensen, Anders Peter [2 ]
Pedersen, Erik Silkjaer [3 ]
Angelidaki, Irini [1 ]
机构
[1] Tech Univ Denmark, Dept Environm Engn, DK-2800 Lyngby, Denmark
[2] Xergi AS, Proc Dev, DK-8830 Tjele, Denmark
[3] Djursland Farmers Union, Crop Prod & Nat, DK-8410 Ronde, Denmark
关键词
Biogas; Anaerobic digestion; Maize; Energy crops; Bioethanol; ENCAPSULATED SACCHAROMYCES-CEREVISIAE; BIOGAS PRODUCTION; ORGANIC-MATTER; LIGNOCELLULOSIC BIOMASS; ETHANOL-PRODUCTION; MONO-DIGESTION; METHANE YIELD; ENERGY CROPS; SILAGE; MANURE;
D O I
10.1016/j.apenergy.2010.01.004
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The methane potential of six varieties of fresh maize (whole plant) harvested at three different times and of maize silage (whole plant) in two particle size distributions was experimentally determined in batch assays. Fresh maize gave the highest methane yield/hectare at late harvest (6270 m(3) CH4 (10(4) m(2))(-1)). The methane yield/wet weight (WW) increased from 80 (early harvest) to 137 m(3) CH4 (t WW)(-1) (late harvest). Maize harvested at different times, or different varieties of maize had similar specific methane production/volatile solids content (m(3) CH4 (kg VS)(-1)). The measured yield m(3) CH4 (kg VS)(-1) was 84% of the theoretical methane potential. The estimated ethanol yield was between 2.5 and 3.5 t ethanol (10(4) m(2))(-1). The energy yield was 62 and 19-22 MWh (10(4) m(2))(-1) if fresh maize (whole plant) is used for methane or ethanol production respectively. Reducing the particle size of maize silage to an average size of approximately 2 mm increased the methane yield m(3) CH4 (kg vs)(-1) by approximately 10%. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2212 / 2217
页数:6
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