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Mixotrophic and heterotrophic production of lipids and carbohydrates by a locally isolated microalga using wastewater as a growth medium
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 257, p. 260-265Article in journal (Refereed) Published
Abstract [en]

The biomass production and changes in biochemical composition of a locally isolated microalga (Chlorella sp.) were investigated in autotrophic, mixotrophic and heterotrophic conditions, using glucose or glycerol as carbon sources and municipal wastewater as the growth medium. Both standard methods and Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) analysis of data acquired by Fourier-transform IR (FTIR) spectrometry showed that autotrophic and mixotrophic conditions promoted carbohydrate accumulation, while heterotrophic conditions with glycerol resulted in the highest lipid content and lowest carbohydrate content. Heterotrophic conditions with glycerol as a carbon source also resulted in high oleic acid (18:1) contents and low linolenic acid (18:3) contents, and thus increasing biodiesel quality. The results also show the utility of MCR-ALS for analyzing changes in microalgal biochemical composition.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 257, p. 260-265
Keywords [en]
Biodiesel, Chlorella, FTIR, Heterotrophy, Wastewater
National Category
Bioenergy
Research subject
Physiology; biology
Identifiers
URN: urn:nbn:se:umu:diva-149244DOI: 10.1016/j.biortech.2018.02.085ISI: 000430401100032OAI: oai:DiVA.org:umu-149244DiVA, id: diva2:1220238
Funder
Swedish Energy Agency, Microbiorefine 2013-06259Available from: 2018-06-18 Created: 2018-06-18 Last updated: 2018-07-20Bibliographically approved

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Nzayisenga, Jean ClaudeSellstedt, Anita

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