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Co-production of lactate and volatile fatty acids through repeated-batch fermentation of fruit and vegetable waste: Effect of cycle time and replacement ratio
Liu, Huiliang1,2,3; Zhen, Feng1,2; Wu, Di5; Wang, Zhi1,2,4; Kong, Xiaoying1,2; Li, Ying1,2; Xing, Tao1,2,6; Sun, Yongming1,2
2023-11-01
摘要In this study, repeated-batch fermentation was used to convert fruit and vegetable waste to lactate and volatile fatty acids (VFAs), which are essential carbon sources for medium-chain fatty acids (MCFAs) production. The effect of cycle time and replacement ratio on acidification in long-term fermentation was investigated. The results showed that they had a significant impact on product yield, productivity, and type of products. Considering the yield, productivity, and lactate/VFAs ratio, a replacement ratio of 30% and a cycle time of 2 d may be more suitable for further production of MCFAs. Its productivity and lactate/VFAs ratio were 4.07 +/- 0.24 g/(L center dot d) and 5 +/- 0.6, respectively. The lactic acid bacteria, such as Enterococcus (63%) and Lactobacillus (33%), stabilized in the reactor, resulting in the generation of both lactate and VFAs by heterolactic fermentation. The present study demonstrated a new strategy with the potential to recover high-value products from organic waste streams.
关键词Volatile fatty acids Lactate Medium-chain fatty acids Repeated-batch fermentation Microbial community
DOI10.1016/j.biortech.2023.129678
发表期刊BIORESOURCE TECHNOLOGY
ISSN0960-8524
卷号387页码:8
通讯作者Xing, Tao(xingtao@ms.giec.ac.cn)
收录类别SCI
WOS记录号WOS:001061633400001
语种英语