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  • Title: Economic and environmental evaluation for a closed loop of crude glycerol bioconversion to biodiesel.
    Author: Sun H, Yang M, Gao Z, Wang X, Wu C, Wang Q, Gao M.
    Journal: J Biotechnol; 2023 Mar 20; 366():65-71. PubMed ID: 36907357.
    Abstract:
    Crude glycerol, a byproduct of biodiesel production, was utilized as a carbon source to produce microbial lipids by the oleaginous yeast Rhodotorula toruloides in this study. The maximum lipid production and lipid content were 10.56 g/L and 49.52%, respectively, by optimizing fermentation conditions. The obtained biodiesel met the standards of China, the United States, and the European Union. The economic value of biodiesel produced from crude glycerol increased by 48% compared with the sale of crude glycerol. In addition, biodiesel production from crude glycerol could reduce 11,928 tons of carbon dioxide emissions and 55 tons of sulfur dioxide emissions. This study provides a strategy for a closed loop of crude glycerol to biofuel and ensures sustainable and stable development of the biodiesel industries.
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