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Hydrothermal Disintegration and Extraction of Different Microalgae Species

Deutsches Biomasseforschungszentrum gemeinnützige GmbH, Biorefineries Department, Torgauer Straße 116, 04347 Leipzig, Germany
Faculty of Agricultural and Environmental Sciences, Chair ofWaste Management, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany
Author to whom correspondence should be addressed.
Energies 2018, 11(2), 450;
Received: 17 December 2017 / Revised: 28 January 2018 / Accepted: 11 February 2018 / Published: 20 February 2018
(This article belongs to the Collection Bioenergy and Biofuel)
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For the disintegration and extraction of microalgae to produce lipids and biofuels, a novel processing technology was investigated. The utilization of a hydrothermal treatment was tested on four different microalgae species (Scenedesmus rubescens, Chlorella vulgaris, Nannochloropsis oculata and Arthorspira platensis (Spirulina)) to determine whether it has an advantage in comparison to other disintegration methods for lipid extraction. It was shown, that hydrothermal treatment is a reasonable opportunity to utilize microalgae without drying and increase the lipid yield of an algae extraction process. For three of the four microalgae species, the extraction yield with a prior hydrothermal treatment elevated the lipid yield up to six times in comparison to direct extraction. Only Scenedesmus rubescens showed a different behaviour. Reason can be found in the different cell wall of the species. The investigation of the differences in cell wall composition of the used species indicate that the existence of algaenan as a cell wall compound plays a major role in stability. View Full-Text
Keywords: microalgae extraction; lipids; microalgal oils; biofuel; cell wall disruption; hydrothermal disintegration; algaenan microalgae extraction; lipids; microalgal oils; biofuel; cell wall disruption; hydrothermal disintegration; algaenan

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Kröger, M.; Klemm, M.; Nelles, M. Hydrothermal Disintegration and Extraction of Different Microalgae Species. Energies 2018, 11, 450.

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