Abstract
A Kraft pulp mill effluent was used as the inoculum to form microbial bioanodes under controlled potential at +0.4V/SCE. Samples were collected at the inlet and outlet of the aerated lagoon of the treatment line. The outlet sample allowed efficient bioanodes to be designed (5.1A/m2), which included Geobacter and Desulfuromonas sp. in their microbial community. In contrast, the bioanodes formed with the inlet sample did not contain directly connecting anode-respiring bacteria and led to lower currents. It was necessary to re-form this bioanode at lower applied potential (−0.2V/SCE) to select more efficient electroactive species and increase the current density to 5A/m2.
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