Synergistic effects of Tween 20 and ethephon on yeast oil and β-carotene co-production by Rhodosporidium toruloides using purified biodiesel-derived crude glycerol as an alternative carbon source

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-02-10 DOI:10.1016/j.biortech.2025.132211

Sasitorn Khuntong , Thidarat Samranrit , Parichat Koedprasong , Jantima Teeka , Chiu-Hsia Chiu , Witsanu Srila , Atsadawut Areesirisuk

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Abstract

This study investigated the impact of chemical inducers on the co-production of yeast oil (YO) and β-carotene from purified biodiesel-derived crude glycerol. The objective was to enhance YO and β-carotene co-production in Rhodosporidium toruloides through the application of individual and combined inducers at both flask and bioreactor scales. Among the individual inducers, 1 % w/v Tween 20 (TW) and 10 ppm ethephon (EP) significantly increased total yeast oil (TO) and total β-carotene (TC) concentrations, respectively. When TW and EP were used together, TO and TC production increased by 2.0 and 2.6-fold, respectively in the bioreactor compared to the flask. The YO primarily consisted of C16 and C18 long-chain fatty acids, and the β-carotene produced showed functional similarities to commercial β-carotene. This research highlights the potential of biodiesel waste as a sustainable feedstock for co-producing YO and β-carotene, with the dual-inducer strategy providing a simple and effective method for enhancing production efficiency.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.