Microalgae harvesting and cell disruption: a preliminary evaluation of the technology electroflotation by alternating current

Some species of microalgae have high productivity and lipid content, which makes them good candidates for biodiesel production. Biomass separation and cell disruption are important steps in biodiesel production from microalgae. In this work, we explored the fundamentals of electroflotation by altern...

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Bibliographic Details
Published in:	Water science and technology Vol. 70; no. 2; pp. 315 - 320
Main Authors:	DE CARVALHO, Riamburgo Gomes, DO NASCIMENTO, José Gilmar da Silva, COSTA, Mayara Carantino, LOPES, Alexandre Colzi, ABDALA, Eliezer Fares, MOTA, César Rossas, DOS SANTOS, André Bezerra
Format:	Journal Article
Language:	English
Published:	London International Water Association 2014 IWA Publishing
Subjects:	Algae Alternating current Applied sciences Biodiesel fuels Biofuels Biomass Cell disruption Chlorophyll Chlorophyll a Diesel Disruption Electrochemical Techniques Electroflotation Evaluation Exact sciences and technology General purification processes Harvesting Lipids Lipids - biosynthesis Microalgae Microalgae - cytology Microalgae - metabolism Microalgae - physiology Pollution Ponds Stabilization ponds Technology Technology assessment Turbidity Waste Disposal, Fluid - methods Waste stabilization ponds Waste Water Wastewaters Water treatment and pollution electroflotation Water treatment cell disruption Stabilization pond stabilization ponds Algae microalgae Lipids Waste water purification lipid extraction Biological purification
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Summary:	Some species of microalgae have high productivity and lipid content, which makes them good candidates for biodiesel production. Biomass separation and cell disruption are important steps in biodiesel production from microalgae. In this work, we explored the fundamentals of electroflotation by alternating current (EFAC) with non-consumable electrodes to simultaneously harvest microalgae and disrupt cells from mixed microalgae obtained from waste stabilization ponds. The harvesting efficiency was evaluated using chlorophyll-a and turbidity, which reached removals of 99% and 95%, respectively, during a batch time of 140 min. Cell disruption was evaluated using lipid extraction, and the best results were achieved with a batch time of 140 min, which resulted in a 14% yield. Therefore, EFAC was shown to be an attractive potential technology for simultaneous microalgal harvesting and cell disruption.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0273-1223 1996-9732
DOI:	10.2166/wst.2014.220