Electricity Production from Yeast Wastewater in Membrane-Less Microbial Fuel Cell with Cu-Ag Cathode

Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on process rate electrodes. In MFC, microorganisms are catalyst, and cathode usually made carbon material (e.g., with addition Pt). To increase MFC efficiency (and reduce costs by reducing use noble metals), necessary search new materials. work, from yeast wastewater membrane-less Cu-Ag was analyzed. first place, measurements stationary electrodes (with catalyst electrochemical deposition technique) were performed. Because constantly oxidized during operation ML-MFC, pre-oxidize cathodes. Without pre-oxidation, there a risk changing catalytic properties (along level oxidation cathodes’ surface) throughout their ML-MFC. These allowed assess activity Additionally, influence anodic charge cathodes measured. Next, analysis electric cell (ML-MFC) fed highest parameters (the power 6.38 mW voltage 1.09 V) for 5% Ag, which over 6 h, after 3 charges. This research proved that feasible obtain bio-electricity ML-MFC (fed wastewater).