The effect of anode potential on bioelectrochemical and electrochemical tetrathionate degradation
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||8|
|Early online date||8 Dec 2016|
|Publication status||Published - Feb 2017|
|Publication type||A1 Journal article-refereed|
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.
- Bioelectrochemical cell, Electrochemical cell, Tetrathionate, Anode potential, Current generation