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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Sustainability in Carbon Capture and Utilization. Biodiesel from Microalgae
verfasst von : E. N. D’Addario
Erschienen in: CO2: A Valuable Source of Carbon
Verlag: Springer London
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Abstract
Biodiesel from microalgae is one of the most promising options of carbon capture and utilization (CCU) because of the direct utilization of solar radiation and the higher biomass and lipid areal productivity in comparison with marine or terrestrial plants. LCA studies on this subject are rather difficult to compare because of inhomogeneous assumptions for oil extraction (the critical step), fertilizer consumptions, use of residual biomass, use of primary energy needed for electricity, use of different fossil fuel for process heat supply, availability of waste heat from fossil or biomass power stations, and climate of the cultivation areas. Nevertheless, GHG savings appear in line with the current EU standards for automotive fuel only under the most favourable conditions (biomass productivity at 25 gm-2 day-1, lipid content at 40–45 %, water and nutrient recycle, favourable climate conditions, use of low energy wet oil extraction processes still to be checked on large scale).