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Screening of yeasts for growth on crude glycerol and optimization of biomass production

Taccari, Manuela and Canonico, Laura and Comitini, Francesca and Mannazzu, Ilaria Maria and Ciani, Maurizio (2012) Screening of yeasts for growth on crude glycerol and optimization of biomass production. Bioresource Technology, Vol. 110 , p. 488-495. eISSN 1873-2976. Article.

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DOI: 10.1016/j.biortech.2012.01.109

Abstract

Out of 113 yeast strains tested, 45 grew on pure glycerol with growth rates ranging from 0.11 to 0.37 h−1. Twenty-three strains showed specific growth rates (h−1), biomass production and biomass yields higher or comparable to those on glucose which suggests that crude glycerol can be utilized as carbon source in yeast cultivation for biomass production. Response surface methodology was applied to optimize crude glycerol concentration and temperature for biomass production and yield by Yarrowia lipolytica (DiSVA C 12.1), Metschnikowia sp. (DiSVA 50), Debaryomyces sp. (DiSVA 45/9), and Rhodotorula mucilaginosa (DiSVA C 7.1). A biomass concentration of 25.7 g/l and a biomass yield of 0.92 g/g (Y/Xglyc) was obtained with Y. lipolytica DiSVA C 12.1 and with R. mucilaginosa DiSVA C 7.1, respectively. These results demonstrate the potential use of crude glycerol as carbon source in yeast cultivation and the yeast ability to convert low-value crude glycerol to added-value products.

Item Type:Article
ID Code:8671
Status:Published
Refereed:Yes
Uncontrolled Keywords:Biodiesel, crude glycerol, biomass, yeasts, response surface methodology (RSM)
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/16 Microbiologia agraria
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Elsevier Science
eISSN:1873-2976
Deposited On:21 Feb 2013 14:40

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