期刊
BIORESOURCE TECHNOLOGY
卷 370, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128398
关键词
Food waste; Open fermentation; Lactic acid; Biological carbon fixation; Biorefinery
The valorization of organic solid waste to lactic acid (LA) in open fermentation systems has gained significant attention recently. In this study, a highly efficient oriented LA bioconversion system from food waste (FW) in open mode was established. The maximum LA production was 115 g/L, with a high yield of 0.97 g-LA/g-total sugar. The oriented LA bioconversion exhibited the capacity for biological carbon fixation by reducing CO2 emissions by at least 21 kg per ton of FW under anaerobic conditions.
The valorization of organic solid waste to lactic acid (LA) in open fermentation systems has attracted tremendous interest in recent years. In this study, a highly efficient oriented LA bioconversion system from food waste (FW) in open mode was established. The maximum LA production was 115 g/L, with a high yield of 0.97 g-LA/g-total sugar. FW is a low-cost feedstock for LA production, containing indigenous hydrolysis and LA-producing bacteria (LAB). Saccharification and real-time pH control were found to be essential for maintaining LAB dominantly in open systems. Furthermore, microbial community analysis revealed that Enterococcus mundtii adapted to complex FW substrates and dominated the subsequent bioconversion process. The oriented LA bioconversion exhibited the capacity for biological carbon fixation by reducing CO2 emissions by at least 21 kg per ton of FW under anaerobic conditions.
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