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

Journal article


Hernandez, E., Colin, W. and Trzcinski, A. 2012. A novel process for enhancing oil production in algae biorefineries through bioconversion of solid by-products. Bioresource Technology. 116, pp. 295-301. https://doi.org/10.1016/j.biortech.2012.03.078
AuthorsHernandez, E., Colin, W. and Trzcinski, A.
Abstract

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.

KeywordsBiorefinery; Fermentation; Carbohydrates; Microalgae; Lipids
Year2012
JournalBioresource Technology
Journal citation116, pp. 295-301
PublisherElsevier
ISSN 0960-8524
Digital Object Identifier (DOI)https://doi.org/10.1016/j.biortech.2012.03.078
Official URLhttp://doi.org/10.1016/j.biortech.2012.03.078
Publication dates
Online30 Mar 2012
Publication process dates
Deposited07 Oct 2020
Accepted24 Mar 2012
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https://repository.canterbury.ac.uk/item/8w6q0/a-novel-process-for-enhancing-oil-production-in-algae-biorefineries-through-bioconversion-of-solid-by-products

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