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Simultaneous co-metabolic decolourisation of azo dye mixtures and bio-electricity generation under thermophillic (50°C) and saline conditions by an adapted anaerobic mixed culture in microbial fuel cells

Fernando, Eustace and Keshavarz, Tajalli and Kyazze, Godfrey (2013) Simultaneous co-metabolic decolourisation of azo dye mixtures and bio-electricity generation under thermophillic (50°C) and saline conditions by an adapted anaerobic mixed culture in microbial fuel cells. Bioresource Technology, 127 . pp. 1-8. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2012.09.065

Abstract

In this study, azo dye adapted mixed microbial consortium was used to effectively remove colour from azo dye mixtures and to simultaneously generate bio-electricity using microbial fuel cells (MFCs). Operating temperature (20°C-50°C) and salinity (0.5% w/v-2.5% w/v) were varied during experiments. Reactor operation at 50°C improved dye decolourisation and COD removal kinetic constants by approximately two fold compared to the kinetic constants at 30°C. Decolourisation and COD removal kinetic constants remained high (0.28h-1 and 0.064h-1 respectively) at moderate salinity (1% w/v) but deteriorated approximately four fold when the salinity was raised to 2.5% (w/v). Molecular phylogenetic analysis of microbial cultures used in the study indicated that both un-acclimated and dye acclimated cultures from MFCs were predominantly comprised of Firmicutes bacteria. This study demonstrates the possibility of using adapted microbial consortia in MFCs for achieving efficient bio-decolourisation of complex azo dye mixtures and concomitant bio-electricity generation under industrially relevant conditions.

Item Type:Article
Research Community:University of Westminster > Life Sciences, School of
ID Code:11311
Deposited On:24 Oct 2012 15:15
Last Modified:03 Feb 2014 15:32

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