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

Revista de Engenharia Térmica Pub Date : 2018-12-28 DOI:10.5380/RETERM.V17I2.64130

J. S. Lemos, J. V. C. Vargas, A. Mariano, V. Kava, J. Klein, J. Ordonez

引用次数: 1

Abstract

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).

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通过絮凝策略收获高脂微藻生物量

研究了不同絮凝剂对斜尖针叶藻生物量的絮凝效果。用不同浓度的FeCl3和NaOH进行絮凝试验，并与以7000 rpm离心的样品进行比较。评估参数为澄清培养基中的吸光度(540 nm)和脂质浓度。以FeCl3 (0.2 mmol L-1)为絮凝剂，絮凝效率为96.8%，以NaOH (8 mmol L-1)为絮凝剂，絮凝效率为93.5%。两种絮凝剂的离心效率均为91.7%。然而，NaOH絮凝降低了脂质含量，而FeCl3没有发生这种情况。絮凝效果受盐浓度的影响，当营养盐浓度增加(9 mL L-1)时，絮凝效果降低79%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Revista de Engenharia Térmica

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