Comparison of pretreatment methods for total lipids extraction from mixed microalgae

Cell disruption can increase the extraction efficiency of total lipids from microalgae for further conversion to biodiesel. Four different pretreatment methods were tested on mixed cultures of microalgae harvested in a stabilization pond system treating sewage: ultrasonication (US), microwaving (MW)...

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Bibliographic Details
Published in:Renewable energy 2014-03, Vol.63, p.762-766
Main Authors: Florentino de Souza Silva, Anna Patrícya, Costa, Mayara Carantino, Colzi Lopes, Alexandre, Fares Abdala Neto, Eliezer, Carrhá Leitão, Renato, Mota, César Rossas, Bezerra dos Santos, André
Format: Article
Language:English
Subjects:
Alternating current
Applied sciences
Biodiesel
Biomass
Cell disruption
Culture
Disruption
Energy
Exact sciences and technology
Extraction
Lipid extraction
Lipids
Microalgae biomass
Natural energy
Ponds
Pretreatment
Stabilization ponds
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Summary:Cell disruption can increase the extraction efficiency of total lipids from microalgae for further conversion to biodiesel. Four different pretreatment methods were tested on mixed cultures of microalgae harvested in a stabilization pond system treating sewage: ultrasonication (US), microwaving (MW), autoclave (AC) and electroflotation by alternating current (EFAC). The best results in terms of total lipid yield were: MW (33.7 ± 5.3%), followed by EFAC (24.8 ± 7.1%), AC (15.4 ± 2.3%), and US (13.3 ± 3.0%). However, when both efficiency and costs are considered, EFAC gave the best result and can be an excellent option for simultaneous microalgae harvesting and cell disruption. •Microalgae cell disruption methods for mixed culture.•Effect of microalgal cell disruption on lipid yield.•Electroflotation by alternating current as a pretreatment method.•Energetic feasibility of the most efficient methods.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2013.10.038