Cited by 54Algal biology and biofuel productionMicrobial Metabolic Engineering and BioproductionBiofuel production and bioconversion

Microbial lipid production by oleaginous yeasts grown on Scenedesmus obtusiusculus microalgae biomass hydrolysate.

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Younes, Samer, Bracharz, Felix, Awad, Dania, Qoura, Farah, Mehlmer, Norbert, Brueck, Thomas·2020·Bioprocess and Biosystems Engineering

Abstract

Due to increasing oil prices and climate change concerns, biofuels have become increasingly important as potential alternative energy sources. However, the use of arable lands and valuable resources for the production of biofuel feedstock compromises food security and negatively affect the environment. Single cell oils (SCOs), accumulated by oleaginous yeasts, show great promise for efficient production of biofuels. However, the high production costs attributed to feedstocks or raw materials present a major limiting factor. The fermentative conversion of abundant, low-value biomass into microbial oil would alleviate this limitation. Here, we explore the feasibility of utilizing microalgae-based cell residues as feedstock for yeast oil production. We developed an efficient, single-step enzymatic hydrolysis to generate Scenedesmus obtusiusculus hydrolysate (SH) without thermo-chemical pretreatment. With this eco-friendly process, glucose conversion efficiencies reached 90-100%. Cutaneotrichosporon oleaginosus, Cryptococcus curvatus and Rhodosporidium toruloides were cultivated on SH as sole nutrients source. Only C. oleaginosus was able to accumulate intracellular lipids, with a 35% (g lipid/g DCW) content and a yield of 3.6 g/L. Our results demonstrate the potential valorization of algal biomass into desired end-products such as biofuels.

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  • Cutaneotrichosporon oleaginosus yeast is capable of producing up to 90% (w/w) lipids per biomass in a fermentation process, and can be grown on residue streams.

    “the production of second-generation biodiesel is possible from microbial lipids produced by organisms, such as Cutaneotrichosporon oleaginosus, a yeast capable of producing up to 90% (w/w) lipids per biomass in a fermentation process, which can be grown on residue streams (e.g., wheat bran hydrolysate medium) [46–49].”

    From The potential of biofuels from first to fourth generation (2023) · cites this paper as [49]

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Research works printed but not linked: 1

  1. [15]Rakicka M Lazar Z Dulermo T Fickers P Nicaud JM Lipid production by the oleaginous yeast Yarrowia lipolytica using industrial by-products under different culture conditions Biotechnol Biofuels 2015 8 1 104 26213570 PMC4513389

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Authors
Younes, S., Bracharz, F., Awad, D., Qoura, F., Mehlmer, N., & Brueck, T.
Affiliations
Technical University of Munich (DE)
Corresponding author
Brueck, Thomas
Venue
Bioprocess and Biosystems Engineering
Published
2020-04-28
Volume
43
Issue
9
Pages
1629-1638
ISSN
  • 1615-7591 (ISSN-L)
  • 1615-7605
OpenAlex
W3017856806
Cited by
54
References
57
Citations by year
2026: 3 · 2025: 5 · 2024: 8 · 2023: 9 · 2022: 7 · 2021: 21 · 2020: 1
FWCI
1.88
Type
journal article
Language
en
Open access
Locations
  • Bioprocess and Biosystems Engineering (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion, other-oa)
Funders
  • BMBF (03SF0446A)
  • BayBioTech (TP7, TLK01U-69045)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
Keywords
oleaginous yeast, microbial lipid production, Scenedesmus obtusiusculus, enzymatic hydrolysis, single cell oil, biofuels, Cutaneotrichosporon oleaginosus, Cryptococcus curvatus, Rhodosporidium toruloides, algal biomass valorization
MeSH terms
Basidiomycota, Lipids, Rhodotorula, Biomass, Scenedesmus, Microalgae

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