Current Production by Bacterial Communities in Microbial Fuel Cells Enriched from Wastewater Sludge with Different Electron Donors

摘要: Electricity production by bacterial communities enriched from wastewater sludge with lactate, succinate, N-acetyl-D-glucosamine (NAG), acetate, formate, and uridine were monitored in dual-chamber microbial fuel cells (MFCs). Stable electricity was observed after 300 h for while NAG, stabilized only 700 h. The average peak current densities maximum power generated consortia significantly higher than those pure cultures of Shewanella oneidensis MR-1. Microbial assemblages analyzed DGGE, planktonic anode-attached varied as a function electron donors: Firmicutes, β-Proteobacteria, Bacteroidetes dominated the consisted mainly δ-Proteobacteria, Firmicutes. Similar populations MFCs fed formate. Cross-feeding experiments different fuels indicated that able to utilize variety sources displayed considerable stability, efficiency, robustness generation comparison cultures. In addition, characterizations cultivated strains suggested DGGE analysis likely missed active members exoelectrogenic populations.