瘤胃
稻草
化学
生产(经济)
挥发性脂肪酸
脂肪酸
稻草
制浆造纸工业
农学
食品科学
生物化学
生物
发酵
工程类
宏观经济学
经济
作者
Jinsong Liang,Panyue Zhang,Chen Le,Jianning Chang,Ru Zhang,Guangming Zhang,Yu Tian
标识
DOI:10.1016/j.biortech.2024.130396
摘要
Ruminal microorganisms can efficiently hydrolyze biomass waste for short-chain fatty acid (SCFA) production. However, the continuous SCFA production by ruminal microorganisms at high loads is unclear. In this study, the effectiveness of a rumen semi-continuous reactor at high load for SCFA production was explored. Results showed that SCFA concentration reached 13.3 g/L at 8 % (w/v) corn straw load. The higher the corn straw load, the lower the volatile solid removal. Rumen microbial community composition changed significantly with increasing corn straw load. A significant decrease in bacterial diversity and abundance was observed at 8 % corn straw load. Some core genera such as Prevotella, Saccharofermentans, and Ruminococcus significantly increased. As corn straw loads increased, the expression of functional genes related to hydrolysis and acidogenesis gradually increased. Thus, the 8.0 % load is suitable for SCFA production. These findings provide new insights into high load fermentation of ruminal microorganisms.
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