Biomass Production a Stronger Driver of Cellulosic Ethanol Yield than Biomass Quality

被引:27
|
作者
Sanford, Gregg R. [1 ,3 ]
Oates, Lawrence G. [1 ,3 ]
Roley, Sarah S. [5 ]
Duncan, David S. [1 ,3 ]
Jackson, Randall D. [1 ,3 ]
Robertson, G. Philip [2 ,4 ,5 ]
Thelen, Kurt D. [2 ,4 ]
机构
[1] Univ Wisconsin, DOE Great Lakes Bioenergy Res Ctr, 1552 Univ Ave, Madison, WI 53726 USA
[2] Michigan State Univ, DOE Great Lakes Bioenergy Res Ctr, E Lansing, MI 48824 USA
[3] Univ Wisconsin, Dept Agron, 1575 Linden Dr, Madison, WI 53706 USA
[4] Michigan State Univ, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 USA
[5] Michigan State Univ, WK Kellogg Biol Stn, Hickory Corners, MI 49060 USA
基金
美国国家科学基金会;
关键词
SACCHAROMYCES-CEREVISIAE 424A(LNH-ST); MISCANTHUS X GIGANTEUS; NORTH CENTRAL USA; CORN STOVER; PERENNIAL GRASSLANDS; SPECIES COMPOSITION; COMMERCIAL ENZYMES; ENERGY CROPS; BIOFUELS; BIOENERGY;
D O I
10.2134/agronj2016.08.0454
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Many crops have been proposed as feedstocks for the emerging cellulosic ethanol industry, but information is lacking about the relative importance of feedstock production and quality. We compared yield and sugar content for seven bioenergy cropping systems in south-central Wisconsin (ARL) and southwestern Michigan (KBS) during three growing seasons (2012 through 2014). The cropping systems were (i) continuous corn stover (Zea mays L.), (ii) switchgrass (Panicum virgatum L.), (iii) giant miscanthus (Miscanthus x giganteus Greef & Deuter ex Hodkinson & Renvoize), (iv) hybrid poplar (Populus nigra x P. maximowiczii A. Henry ` NM6'), (v) native grass mix, (vi) early successional community, and (vii) restored prairie. A high-throughput pretreatment and fermentation assay showed corn stover with the highest sugar content (213 g glucose kg(-1) [Glc] and 115 g xylose kg(-1) [Xyl]) followed by the two monoculture perennial grass treatments (154 [Glc] and 88 [Xyl]) and then the herbaceous polycultures (135 [Glc] and 77 [Xyl]). Biomass production and sugar content were combined to calculate ethanol yields. Miscanthus had the highest per hectare ethanol yields (1957 l ha(-1) yr(-1) ARL, 2485 l ha(-1) yr(-1) KBS) followed by switchgrass (1091 l ha(-1) yr(-1) ARL, 1017 l ha(-1) yr(-1) KBS) and corn stover (1121 l ha(-1) yr(-1) ARL, 878 l ha(-1) yr(-1) KBS). Perennial grass cropping systems (i. e., switchgrass and miscanthus) had higher per hectare ethanol yields at both sites relative to diverse systems that included dicots. Despite feedstock differences in fermentable sugars, biomass production was the strongest driver of per hectare ethanol yield.
引用
收藏
页码:1911 / 1922
页数:12
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