Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China.
Bioresour Technol. 2023 Nov;387:129678. doi: 10.1016/j.biortech.2023.129678. Epub 2023 Aug 12.
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·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.
在这项研究中，采用分批补料发酵将水果和蔬菜废物转化为乳酸和挥发性脂肪酸 (VFAs)，这些是中链脂肪酸 (MCFAs) 生产的重要碳源。研究了循环时间和替代率对长期发酵酸化的影响。结果表明，它们对产品产率、生产力和产品类型有显著影响。考虑到产率、生产力和乳酸/VFA 比，替代率为 30%和循环时间为 2 d 可能更适合 MCFAs 的进一步生产。其生产力和乳酸/VFA 比分别为 4.07 ± 0.24 g/（L·d）和 5 ± 0.6。在反应器中稳定下来的肠球菌（63%）和乳酸菌（33%）等乳酸菌通过异型乳酸发酵产生乳酸和 VFAs。本研究展示了一种从有机废物中回收高价值产品的新策略。
