Screening, Growth Medium Optimisation and Heterotrophic Cultivation of Microalgae for Biodiesel Production
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This article presents a study on screening of microalgal strains from the Peking University Algae Collection and heterotrophic cultivation for biodiesel production of a selected microalgal strain. Among 89 strains, only five were capable of growing under heterotrophic conditions in liquid cultures and Chlorella sp. PKUAC 102 was found the best for the production of heterotrophic algal biodiesel. Composition of the growth medium was optimised using response surface methodology and optimised growth conditions were successfully used for cultivation of the strain in a fermentor. Conversion of algal lipids to fatty acid methyl esters (FAMEs) showed that the lipid profile of the heterotrophically cultivated Chlorella sp. PKUAC 102 contains fatty acids suitable for biodiesel production.
KeywordsMicroalgae Heterotrophic cultivation Oil accumulation Algal biodiesel
Peking University Algae Collection
Fatty acid methyl esters
Response surface methodology
This project was predominantly funded by a Shenzhen Development and Reform Commission grant  835 and partially co-funded from start-up grant of Peking University Shenzhen Graduate School number 0068 to MD and National Research Foundation and Economic Development Board of Singapore (SPORE, COY-15-EWI-RCFSA/N197-1) to ZCJ. Authors would like to acknowledge Fei Zhang and Weilin Yi for their lab assistance.
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