Journal
BIORESOURCE TECHNOLOGY
Volume 170, Issue -, Pages 370-378Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.07.109
Keywords
Microalgae; Lipid extraction; Supercritical carbon dioxide; Anaerobic digestion; Biorefinery
Funding
- INIA (Spanish Agricultural and Agro-Food Research Institute) training program
- Cassa di Risparmio del Veneto Foundation
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Renewable fuels and energy are of major concern worldwide and new raw materials and processes for its generation are being investigated. Among these raw materials, algae are a promising source of lipids and energy. Thus, in this work four different algae have been used for lipid extraction and biogas generation. Lipids were obtained by supercritical CO2 extraction (SCCO2), while anaerobic digestion of the lipid-exhausted algae biomass was used for biogas production. The extracted oil composition was analyzed (saturated, monounsaturated and polyunsaturated fatty acids) and quantified. The highest lipid yields were obtained from Tetraselmis sp. (11%) and Scenedesmus almeriensis (10%), while the highest methane production from the lipid-exhausted algae biomass corresponded to Tetraselmis sp. (236 mL CH4/g VSadded). (C) 2014 Elsevier Ltd. All rights reserved.
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