A cylindrical-conical photobioreactor and a sludge drying bed as an efficient system for cultivation of the green microalgae Coelastrum sp. and dry biomass recovery
Microalgae are photosynthetic microorganisms that are studied due to the variety of metabolites they produce. However,if cultivated in photobioreactors, these devices should be easy to scale up. Also, harvesting and drying the microalgalbiomass should be economically viable at industrial scale. Based on this point of view, in this work a 1.5 L cylindrical-conical photobioreactor was designed to cultivate and harvest the microalgaCoelastrumsp. under nitrogen limitation. A celldensity of 23.47×106 cells mL−1was attained. Biomass and lipid productivities after 5 days of nitrogen limitation were266.24 mg L−1d−1and 137.51 mg L−1d−1respectively. A lipid content of 45.6% (w/w dry biomass) was attained. A sludgedrying bed was also designed to dry the microalgal biomass. The retention filter used in the sludge drying bed allowed an 86.8%of cell retention efficiency, and the final water content of the dried biomass was 7.8%±1.99 which allowed the lipid extractionwithout further drying. The lipid profile after transesterification of triacylglycerides was [C14:0 (3%), C16:0 (35.5%), C18:0(42.5%), C18:1 (14.3%), C18:2 (4.6%)] which indicates that the lipid extract is more suitable for green diesel production thanbiodiesel.
| Main Authors: | , , , |
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| Format: | info:eu-repo/semantics/article biblioteca |
| Language: | eng |
| Subjects: | info:eu-repo/classification/Autores/HARVEST, info:eu-repo/classification/Autores/DEWATERING, info:eu-repo/classification/Autores/NUTRIENT DEPLETION, info:eu-repo/classification/Autores/LIPID CONTENT, info:eu-repo/classification/Autores/BIOFUELS, info:eu-repo/classification/cti/7, info:eu-repo/classification/cti/33, info:eu-repo/classification/cti/3322, info:eu-repo/classification/cti/531205, |
| Online Access: | http://cicy.repositorioinstitucional.mx/jspui/handle/1003/1687 |
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