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Enhancing the erythritol production by Yarrowia lipolytica from waste oil using loofah sponge as oil-in-water dispersant

文献类型： 外文期刊

作者： Liu, Xiaoyan 1 ; Yu, Xinjun 3 ; Gao, Shan 4 ; Dong, Xiujin 1 ; Xia, Jun 1 ; Xu, Jiaxing 1 ; He, Aiyong 1 ; Hu, Lei 1 ; Yan, 1 ;

作者机构： 1.Huaiyin Normal Univ, Jiangsu Key Lab Biomass Based Energy & Enzyme Tec, Huaian, Peoples R China

2.Huaiyin Normal Univ, Jiangsu Collaborat Innovat Ctr Reg Modern Agr & E, Huaian, Jiangsu, Peoples R China

3.Zhejiang Univ Technol, Coll Biotechnol & Bioengn, Key Lab Bioorgan Synth Zhejiang Prov, Hangzhou, Zhejiang, Peoples R China

4.Wuhan Regen Environm Remediat Co Ltd, Engn Dept, Wuhan 430071, Hubei, Peoples R China

5.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Polar Fishery, Minist Agr & Rural Affairs, Qingdao 266071, Shandong, Peoples R China

关键词： Erythritol production; Waste oil utilization; Yarrowia lipolytica; Loofah sponge; Fed-batch cultivation

期刊名称：BIOCHEMICAL ENGINEERING JOURNAL （ 影响因子：3.978； 五年影响因子：4.084 ）

ISSN： 1369-703X

年卷期： 2019 年 151 卷

页码：

收录情况： SCI

摘要： Waste oil is an economical alternative carbon resource in Yarrowia-based erythritol production, but the water insolubility limits its further utilization. Loofah sponge (LS), a natural polymer material and accessible agricultural waste, was selected as oil-in-water dispersant in this study. In the oil-erythritol cultivation system with LS addition, efficient oil dispersion and enhanced erythritol production (by 30%) were achieved, with high biomass and scarce residual oil in the medium. Up to 60.0 g/L of waste oil could be completely consumed under the effect of LS, resulting to an erythritol yield of 0.76 +/- 0.03 g/g oil. Scanning electron microscopy (SEM) images and reusability experiments showed that the LS fiber was well preserved and could be stable for more than five continuous cycles in this process. The changes in activities of the metabolic enzymes suggested an enhanced carbon flux in erythritol synthesis pathway, which was accompanied with an improved oxygen consumption. Moreover, with LS addition, scale-up and fed-batch cultivations was well conducted, up to 114.3 +/- 1.8 g/L of erythritol was produced from waste oil when the two cultivation strategies were combined. This study demonstrated an efficient and eco-friendly method for the utilization of waste oily substrates in production of microbial metabolites.

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