Current Prospects on Production of Microbial Lipid and Other Value-Added Products Using Crude Glycerol Obtained from Biodiesel Industries |
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Authors: | Bijaya K. Uprety Balaji Venkatesagowda Sudip K. Rakshit |
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Affiliation: | 1.Department of Biotechnology,Lakehead University,Thunder Bay,Canada;2.Biorefining Research Institute,Lakehead University,Thunder Bay,Canada;3.Department of Chemical Engineering,Lakehead University,Thunder Bay,Canada |
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Abstract: | Production of microbial lipids using crude glycerol from the biodiesel industry is reviewed in this paper. Approximately 10 wt.% of crude glycerol is obtained for every batch of biodiesel. The crude glycerol accumulated contains various impurities and hence cannot be used for any commercial applications without further purification. Its conversion via biological and chemical routes into valuable products has been studied by different researchers. Varieties of fungal, yeasts, and algal species have been used to produce microbial lipids from crude glycerol. However, research focus on screening a robust industrial oleaginous strain capable of doing this is still on-going. Due to its chemical similarity to vegetable oils, microbial lipids are considered a potential renewable feedstock for biodiesel production and for applications in food and pharmaceutical industries. Its conversion to polyols and subsequently to biobased polymers is also being explored. The rising price of vegetable oils, increasing energy demands, growing environmental concerns, and availability of crude glycerol as a cheap carbon substrate result in considerable potential for the application of these processes in the future. |
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