A novel process for enhancing oil production in algae biorefineries through bioconversion of solid by-products

Trzcinski, Antoine P. and Hernandez, Ernesto and Webb, Colin (2012) A novel process for enhancing oil production in algae biorefineries through bioconversion of solid by-products. Bioresource Technology, 116. pp. 295-301. ISSN 0960-8524

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This paper focuses on a novel process for adding value to algae residue. In current processes oleaginous microalgae are grown and harvested for lipid production leaving a lipid-free algae residue. The process described here includes conversion of the carbohydrate fraction into glucose prior to lipid extraction. This can be fermented to produce up to 15% additional lipids using another oleaginous microorganism. It was found that in situ enzymes can hydrolyze storage carbohydrates in the algae into glucose and that a temperature of 55°C for about 20 h gave the best glucose yield. Up to 75% of available carbohydrates were converted to a generic fermentation feedstock containing 73 g/L glucose. The bioconversion step was found to increase the free water content by 60% and it was found that when the bioconversion was carried out prior to the extraction step, it improved the solvent extractability of lipids from the algae.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 14 Jul 2016 04:08
Last Modified: 20 Jul 2018 05:43
Uncontrolled Keywords: biorefinery; fermentation; carbohydrates; microalgae; lipids
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050205 Environmental Management
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Identification Number or DOI: 10.1016/j.biortech.2012.03.078
URI: http://eprints.usq.edu.au/id/eprint/28932

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