Ethanol Fermentation Performance of Grain Sorghums (Sorghum bicolor) with Modified Endosperm Matrices
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- 作者：Xiaorong Wu ; Babitha Jampala ; Adriana Robbins ; Dirk Hays ; Shuping Yan ; Feng Xu ; William Rooney ; Gary Peterson ; Yong-Cheng Shi ; Donghai Wang
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2010
- 出版时间：September 8, 2010
- 年：2010
- 卷：58
- 期：17
- 页码：9556-9562
- 全文大小：870K
- 年卷期：v.58,no.17(September 8, 2010)
- ISSN：1520-5118
文摘
We tested 13 sorghum entries (lines and hybrids) with different endosperm matrices for ethanol production using a laboratory dry grind process. Waxy and heterowaxy samples had the highest efficiencies. Free amino nitrogen (FAN) contents in sorghum samples were positively related to the fermentation rate during fermentation (R2 = 0.8618). Dried distiller’s grain with solubles (DDGS) from different sorghums had significantly different crude protein and crude fat contents. Residual starch content in DDGS ranged from 0.60% for the most efficient sample to 2.66% for the least efficient sample. This study showed that the HD lines (TX1, TX3, TX5, TX7, and TX9) with modified endosperm protein matrix have several attributes desirable for ethanol production: easily pasted starch granules, significantly higher FAN content in finished mashes, 30−45% faster ethanol fermentation rate during early stages, and 50−60% higher lysine content in DDGS.