Three biofilm-electrode reactors (BERs) with multiple cathodes were applied to investigate the effect of electrode configuration and flow direction on denitrification under laboratory-scale conditions. The distribution of nitrate, DO and pH varied among applied BERs, as a consequence of a different electrode position in the reactors, bringing about a difference in the performance. Flow-through configuration of electrodes with a downstream anode appears to be the most suitable configuration since nitrite did not accumulate in the effluent only in this experiment and the current-denitrification efficiency at low current densities was high. Thus, it is recommended for a low-loading operation.
Comparative study on the bio-electrochemical denitrification equipped with a multi-electrode system
M. Prosňanský, T. Watanabe, M. Kuroda; Comparative study on the bio-electrochemical denitrification equipped with a multi-electrode system. Water Sci Technol 1 November 2005; 52 (10-11): 479–485. doi: https://doi.org/10.2166/wst.2005.0726
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