Evaluation of various harvesting methods for high-density microalgae, Aurantiochytrium sp. KRS101

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Five technologies, coagulation, electro-flotation (EF), electro-coagulation-flotation (ECF), centrifugation, and membrane filtration, were systematically assessed for their adequacy of harvesting Aurantiochytrium sp. KRS101, a heterotrophic microalgal species that has much higher biomass concentration than photoautotrophic species. Coagulation, EF, and ECF were found to have limited efficiency. Centrifugation was overly powerful to susceptible cells like Aurantiochytrium sp. KRS101, inducing cell rupture and consequently biomass loss of over 13%. Membrane filtration, in particular equipped with an anti-fouling turbulence generator, turned out to be best suited: nearly 100% of harvesting efficiency and low water content in harvested biomass were achieved. With rotation rate increased, high permeate fluxes could be attained even with extremely concentrated biomass: e.g., 219.0 and 135.0 L/m(2)/h at 150.0 and 203.0 g/L, respectively. Dynamic filtration appears to be indeed a suitable means especially to obtain highly concentrated biomass that have no need of dewatering and can be directly processed. (C) 2015 Elsevier Ltd. All rights reserved
Publisher
ELSEVIER SCI LTD
Issue Date
2015-12
Language
English
Article Type
Article
Citation

BIORESOURCE TECHNOLOGY, v.198, pp.828 - 835

ISSN
0960-8524
DOI
10.1016/j.biortech.2015.09.103
URI
http://hdl.handle.net/10203/209856
Appears in Collection
CE-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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