Produção Nacional
Identification of microalgae from waste stabilization ponds and evaluation of electroflotation by alternate current for simultaneous biomass separation and cell disruption
2019; Brazilian Association of Sanitary and Environmental Engineering; Volume: 24; Issue: 1 Linguagem: Inglês
10.1590/s1413-41522019193972
ISSN1809-4457
AutoresAnna Patrícya Florentino, Mayara Carantino Costa, José Gilmar da Silva do Nascimento, Eliezer Fares Abdala-Neto, César R. Mota, André Bezerra dos Santos,
Tópico(s)Aquatic Ecosystems and Phytoplankton Dynamics
ResumoABSTRACT This work aimed to investigate algal diversity at the genus level in stabilization pond systems treating domestic wastewater and to evaluate the feasibility of an electroflotation by alternate current (EFAC) system for simultaneous microalgae separation and cell disruption. Evaluation of algal diversity showed that the genera Euglena and Chlorella were present in relatively high frequencies in five of the six effluents analyzed. The use of EFAC on an effluent that presented bloom of Chlorella achieved turbidity and chlorophyll-a removal efficiencies higher than 70 and 90%, respectively, after 70 minutes of operation. Total lipid yield for the Chlorella-rich biomass was 21.4±2.02%. Such high biomass lipid content demonstrates the potential for obtaining lipid-based biofuels from wastes. The current paper describes the first attempt, with promising results, at using electroflotation by alternate current for low cost, simultaneous microalgae harvesting and disruption.
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