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Screening of oleaginous yeasts for lipid production using volatile fatty acids as substrate

机译：使用挥发性脂肪酸作为底物的脂质生产的溶血性酵母筛选

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摘要

Using residual material instead of sugars as substrate for oleaginous microorganisms is a promising approach that may reduce the production costs of microbial lipid. In this study, five oleaginous yeasts were screened for their ability to grow and produce lipid utilizing volatile fatty acids (VFAs), generated from anaerobic fermentation of microalgal biomass, as the only carbon and energy source. Yeasts growth and lipid accumulation capacity at three VFAs concentrations (i.e. 5,10 and 15 g L~(-1)) were evaluated. Regardless of VFAs concentration four of the five strains were able to grow in digestates reaching biomass yields from VFAs between 0.22 and 0.37 g g~(-1). The highest lipid content in dry biomass was observed in Cutaneotrichosporon curvatum and Cyberlindnera satornus (36.9 and 33.9% on dry biomass, respectively) corresponding to lipid yields from VFAs of 0.11 and 0.13 g g~(-1), respectively. Oleic, palmitic and linoleic acids were the major fatty acids, accounting for more than 70% of the fatty acids contained in total yeast lipids, profile similar to that of common vegetable oils. The above findings suggest that microalgal biomass derived VFAs could be converted into yeast lipid suitable as feedstock in the chemical (including biofuel) industry.
机译：使用残留材料而不是糖作为糖微生物的底物是一种有望的方法，可以降低微生物脂质的生产成本。在这项研究中，筛选出5种含油酵母，用于使用从微藻生物量的厌氧发酵产生的挥发性脂肪酸（VFA）作为唯一的碳和能源产生的挥发性脂肪酸（VFA）。评估酵母生长和三种VFA浓度的脂质累积能力（即5,10和15g L〜（-1））。无论VFAS浓度是否在5个菌株中的四个能够在达到0.22和0.37g g〜（-1）之间的VFA的消化物中生长。在CutaneoTrichosporon Curvatum和Cyber​​ Lindnera山梨酱（36.9和33.9％上，分别对应于来自0.11和0.13gg〜（-1）的脂质产率的脂质产率，观察到干生物质中的最高脂质含量。油酸，棕榈酸和亚油酸是主要的脂肪酸，占总酵母脂质含量的脂肪酸的70％以上，概况与常见的植物油相似。上述研究结果表明，微藻生物量衍生的VFA可以转化为酵母脂质，适合作为化学（包括生物燃料）工业的原料。

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  • 来源
    《Biomass & bioenergy》 |2020年第7期|105553.1-105553.10|共10页
  • 作者

    Mercedes Llamas; Marianna Dourou; Cristina Gonzalez-Fernandez; George Aggelis; Elia Tomas-Pejo;

  • 作者单位

    Biotechnological Processes Unit IMDEA Energy Madrid Spain Unit of Microbiology Division of Genetics Cell and Developmental Biology. Department of Biology University of Patras Patras Greece Biotechnological Processes Unit IMDEA Energy Madrid Spain;

    Unit of Microbiology Division of Genetics Cell and Developmental Biology. Department of Biology University of Patras Patras Greece;

    Biotechnological Processes Unit IMDEA Energy Madrid Spain;

    Unit of Microbiology Division of Genetics Cell and Developmental Biology. Department of Biology University of Patras Patras Greece;

    Biotechnological Processes Unit IMDEA Energy Madrid Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microalgae anaerobic fermentation; Volatile fatty acids; Oleaginous yeasts; Screening; Single cell oils;

    机译：微藻厌氧发酵;挥发性脂肪酸;含油酵母;筛选;单细胞油;

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