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Effects of Salts Contained in Lignocellulose-Derived Sugar Streams on Microbial Lipid Production

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Abstract

This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12.79 g/L along with the depletion of both glucose and xylose, while Y. lipolytica (NRRL YB-437) showed the lowest lipid production and limited capability of xylose utilization. The key factors, including inoculation size, initial pH, and salt, all contributed to successful non-sterile fermentation. This study demonstrated that it is feasible to perform both sterile and non-sterile fermentation for lipid production using salt-containing lignocellulose-derived sugar streams.

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Authors and Affiliations

  1. Department of Bioengineering, University of Missouri, Columbia, MO, 65211, USA

    Zhu Chen & Caixia Wan

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  1. Zhu Chen
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  2. Caixia Wan
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Correspondence to Caixia Wan.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Chen, Z., Wan, C. Effects of Salts Contained in Lignocellulose-Derived Sugar Streams on Microbial Lipid Production. Appl Biochem Biotechnol 183, 1362–1374 (2017). https://doi.org/10.1007/s12010-017-2504-6

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  • DOI: https://doi.org/10.1007/s12010-017-2504-6

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