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| Titel |
Removal of freshwater microalgae by a magnetic separation method |
| VerfasserIn |
Sofia S. Vergini, Andriana F. Aravantinou, Ioannis D. Manariotis |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082821
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| Zusammenfassung |
| Some species of microalgae, with high growth rate and high lipid content, appear to be
attractive alternatives as a feedstock for biodiesel production. The high-energy
input for harvesting biomass and removing the water from the algae makes current
commercial microalgal biodiesel production cost expensive. The major techniques
currently employed in microalgae harvesting and recovery include centrifugation,
coagulation-flocculation, bio-flocculation, filtration and screening, gravity sedimentation, and
flotation. The purpose of this study was to investigate the harvesting of microalgae cells by
coagulation using magnetic activated carbon, magnetite (FeO4) nanoparticles, and
common chemical coagulants. Scenedesmus rubescens was selected and cultivated
in 10 L flasks under continuous artificial light. Samples were taken at different
operation intervals. Jar tests were conducted to investigate the effect of adsorption of
microalgae on the magnetic material. The removal efficiency of microalgae was
affected by the coagulants dose, stirring time and speed, and the initial microalgae
concentration. The recovery of microalgae was greater in cultures with high initial
microalgae concentration compared to cultures with low microalgae concentrations. |
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