Yeasts for Single Cell Oil Production from Non-conventional Bioresources

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Microbial Biotechnology for Renewable and Sustainable Energy

Part of the book series: Clean Energy Production Technologies ((CEPT))

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Abstract

Oleaginous microorganisms accumulating more than 20% of their dry weight biomass as lipids are used for the production of microbial lipid, also called as single cell oil (SCO). SCO from oleaginous yeasts with a fatty acid profile comparable to that of vegetable oil can be a potential feedstock for biodiesel production. Biodiesel is a renewable biofuel, alternative to petroleum fuels. Due to increasing energy demand and depletion of existing fossil fuel reserves, intensive research has been focused on sustainable biodiesel production. Oleaginous yeasts are more advantageous compared to other oleaginous microorganisms because of their fast duplication rate, shorter life cycle, easier to scale up, and amenability to genetic modifications. Production of microbial lipid with oleaginous yeasts from nonedible and abundant lignocellulosic biomass has been viewed as a novel potential technology to fulfill the increasing energy demand. But lignocellulosic biomass being recalcitrant requires pretreatment step and hydrolysis for the conversion of complex polymers into their respective monomers like glucose that can be assimilated into lipids by oleaginous yeasts. These pretreatment methods also generate various degradation products that inhibit enzyme hydrolysis and subsequent fermentation. Understanding the mechanism of lipid accumulation, improvement of strains for high lipid yield from lignocellulosic hydrolysate is necessary for sustainable biodiesel production. In this chapter, we discuss the importance of lignocellulosic biomass as a raw material for sustainable single cell oil production from oleaginous yeasts.

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Sajish, S., Singh, S., Nain, L. (2022). Yeasts for Single Cell Oil Production from Non-conventional Bioresources. In: Saini, J.K., Sani, R.K. (eds) Microbial Biotechnology for Renewable and Sustainable Energy. Clean Energy Production Technologies. Springer, Singapore. https://doi.org/10.1007/978-981-16-3852-7_13

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