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The effect of anode potential on bioelectrochemical and electrochemical tetrathionate degradation

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalBioresource Technology
Volume226
Early online date8 Dec 2016
DOIs
Publication statusPublished - Feb 2017
Publication typeA1 Journal article-refereed

Abstract

The effect of poised anode potential on electricity production and tetrathionate degradation was studied in two-chamber flow-through electrochemical (ES) and bioelectrochemical systems (BES). The minimum anode potential (vs. Ag/AgCl) for positive current generation was 0.3 V in BES and 0.5 V in the abiotic ES. The anode potential required to obtain average current density above 70 mA m-2 was 0.4 V in BES and above 0.7 V in ES. ES provided higher coulombic efficiency, but the average tetrathionate degradation rate remained significantly higher in BES (above 110 mg L-1 d-1) than in the abiotic ES (below 35 mg L-1 d-1). This study shows that at anode potentials below 0.7 V, the electrochemical tetrathionate degradation is only efficient with microbial catalyst and that significantly higher tetrathionate degradation rates can be obtained with bioelectrochemical systems than with electrochemical systems at the tested anode potentials.

Keywords

  • Bioelectrochemical cell, Electrochemical cell, Tetrathionate, Anode potential, Current generation

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