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dc.contributor.authorDanquah, Michael
dc.contributor.authorGladman, B.
dc.contributor.authorMoheimani, N.
dc.contributor.authorForde, G.
dc.date.accessioned2017-01-30T11:31:10Z
dc.date.available2017-01-30T11:31:10Z
dc.date.created2016-09-12T08:36:35Z
dc.date.issued2009
dc.identifier.citationDanquah, M. and Gladman, B. and Moheimani, N. and Forde, G. 2009. Microalgal growth characteristics and subsequent influence on dewatering efficiency. Chemical Engineering Journal. 151 (1-3): pp. 73-78.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/12517
dc.identifier.doi10.1016/j.cej.2009.01.047
dc.description.abstract

Dewatering of microalgal culture is a major bottleneck towards the industrial-scale processing of microalgae for bio-diesel production. The dilute nature of harvested microalgal cultures poses a huge operation cost to dewater; thereby rendering microalgae-based fuels less economically attractive. This study explores the influence of microalgal growth phases and intercellular interactions during cultivation on dewatering efficiency of microalgae cultures. Experimental results show that microalgal cultures harvested during a low growth rate phase (LGRP) of 0.03 d-1 allowed a higher rate of settling than those harvested during a high growth rate phase (HGRP) of 0.11 d-1, even though the latter displayed a higher average differential biomass concentration of 0.2 g L-1 d-1. Zeta potential profile during the cultivation process showed a maximum electronegative value of -43.2 ± 0.7 mV during the HGRP which declined to stabilization at -34.5 ± 0.4 mV in the LGRP. The lower settling rate observed for HGRP microalgae is hence attributed to the high stability of the microalgal cells which electrostatically repel each other during this growth phase. Tangential flow filtration of 20 L HGRP culture concentrated 23 times by consuming 0.51 kWh/m3 of supernatant removed whilst 0.38 kWh/m3 was consumed to concentrate 20 L of LGRP by 48 times. © 2009 Elsevier B.V. All rights reserved.

dc.publisherElsevier BV
dc.titleMicroalgal growth characteristics and subsequent influence on dewatering efficiency
dc.typeJournal Article
dcterms.source.volume151
dcterms.source.number1-3
dcterms.source.startPage73
dcterms.source.endPage78
dcterms.source.issn1385-8947
dcterms.source.titleChemical Engineering Journal
curtin.departmentCurtin Sarawak
curtin.accessStatusFulltext not available


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