alexa Biomass, lipid and fatty acid production in large-scale cultures of the marine macroalga Derbesia tenuissima (Chlorophyta).
Environmental Sciences

Environmental Sciences

Journal of Petroleum & Environmental Biotechnology

Author(s): Magnusson M, Mata L, de Nys R, Paul NA

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Abstract Biomass productivity was quantified for the marine macroalga Derbesia tenuissima cultivated outdoors at seven stocking densities from 0.25 to 8 g L(-1) for 5 weeks. Total lipids and fatty acid quantity and quality was measured from samples that were freeze-dried, dried by oven (75 °C), food dehydrator (60 °C), or outdoor in the sun (40 °C) or shade (38 °C). Stocking densities of 0.25 to 2 g L(-1) yielded the highest biomass productivities (>20 g dry weight m(-2) day(-1)) with no effect on total lipid quantity (11 \%), or fatty acid quantity (5.3 \%) or quality at any density tested. However, there was an interactive effect of stocking density and drying technique, with a decrease of up to 40 \% in polyunsaturated fatty acids in sun-dried compared to freeze-dried biomass. Notably, while fatty acid and biomass productivity may be inseparable in macroalgae, cultivation conditions have a significant carryover effect in the post-harvest delivery of high-quality bio-oils. This article was published in Mar Biotechnol (NY) and referenced in Journal of Petroleum & Environmental Biotechnology

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