THE HARVESTING OF HIGH LIPID CONTENT MICROALGAE BIOMASS THROUGH A FLOCCULATION STRATEGY

Autor: J. O. Klein, Juan C. Ordonez, J. S. Lemos, José Viriato Coelho Vargas, André Bellin Mariano, Vanessa Kava
Rok vydání: 2018
Předmět:
Zdroj: Revista de Engenharia Térmica. 17:41
ISSN: 1676-1790
DOI: 10.5380/reterm.v17i2.64130
Popis: Different flocculants were evaluated for the flocculation of microalgae biomass of Acutodesmus obliquus. Flocculation was tested with FeCl3 and NaOH at different concentrations and compared to a sample centrifuged at 7000 rpm. The evaluated parameters were absorbance (540 nm) in the clarified medium, and lipids concentration. For FeCl3 (0.2 mmol L-1) as flocculant, efficiency was 96.8%, and with NaOH (8 mmol L-1) 93.5%. Centrifugation efficiency was lower than with either flocculants: 91.7%. However, NaOH flocculation reduced lipid content, which did not occur with FeCl3. Flocculation efficiency was affected by salt concentration, reducing efficiency by 79% due to increased nutrient concentration (9 mL L-1).
Databáze: OpenAIRE