Journal
BIORESOURCE TECHNOLOGY
Volume 200, Issue -, Pages 1073-1075Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.10.106
Keywords
Lipid extraction; Persulfate; Oxidation; Microalgae; Fenton-like reaction
Funding
- Advanced Biomass R&D Center (ABC) of National Research Foundation (NRF) in Korea - Ministry of Science, ICT and Future Planning [2011-0031348]
- National Research Foundation (NRF) of Korea by the Ministry of Education, Science and Technology (MEST) of Korea [NRF-2012M1A2A2026587]
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In this study, persulfate, a solid-type oxidant, was adopted as a substitute for hydrogen peroxide in extracting lipid from microalgae biomass. Microalgae cells were concentrated at pH 3 and with 200 mg/L of ferric chloride, conditions which can activate oxidants such as hydrogen peroxide and persulfate. At a persulfate concentration of 2 mM and a reaction temperature of 90 degrees C, exceedingly high extraction efficiency over 95% was obtained, which was higher than with 0.5% hydrogen peroxide at the same temperature. This result showed that persulfate is sufficiently powerful and incomparably cheap enough to replace the potent yet expensive oxidant. It appears that combining iron-based coagulation and persulfate-based lipid extraction is indeed a competitive approach that can possibly lighten the process burden for the microalgae-derived biodiesel production. (C) 2015 Published by Elsevier Ltd.
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