Agro-industrial waste recycling by Trichosporon fermentans: conversion of waste sweetpotato vines alone into lipid
文献类型： 外文期刊
第一作者： Shen, Qi
作者： Shen, Qi;Wang, Qun;Zhao, Yuhua;Shen, Qi;Chen, Yue;Lin, Hui
作者机构：
关键词： Waste sweetpotato vines; Trichosporon fermentans; Microbial oil; Autoclaving; Simultaneous saccharification and fermentation
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）
ISSN： 0944-1344
年卷期： 2018 年 25 卷 9 期
页码：
收录情况： SCI
摘要： Agro-industrial waste can be used to replace traditional carbohydrates, such as sucrose, starch, and glucose in many industrial fermentation processes. This study investigated the conversion of pre-treated waste sweetpotato vines (SV) into lipid by Trichosporon fermentans under the separate hydrolysis and fermentation (SHF) and the simultaneous saccharification and fermentation (SSF) processes. The results showed that SV autoclaving significantly increased the lipid accumulation of T. fermentans compared with acid or alkaline hydrolysis. The effects of different pre-treatments on SV were also studied by scanning electron microscopy and Fourier transform infrared spectroscopy, which showed the partial removal of the aliphatic fractions, hemicelluloses, and lignin during pre-treatment. Moreover, the lipid yield of T. fermentans in SSF was 6.98 g L-1, which was threefold higher than that (2.79 g L-1) in SHF, and the lipid contents of yeast in SSF and SHF were 36 and 25%, respectively. Overall, this study indicated that SSF using autoclaved SV could increase the growth and lipid production of T. fermentans and provided an efficient way to realize the resource utilization of waste SV.
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