Comparative evaluation of Pseudomonas species in single chamber microbial fuel cell with manganese coated cathode for reactive azo dye removal

Microbial fuel cell (MFCs), distinguished by different strains of Pseudomonas species; Pseudomonas aeruginosa (MPEM-MFC I) and Pseudomonas fluorescens (MPEM-MFC II), was analyzed. Results have shown that, over a period of 360 h in the presence of 0.5 mM of model dye, MPEM MFC I produced the maximum power density of 2887 +/- 13 mu W m(-2) (RO-16) and 1906 +/- 7 mu W m(-2) (RB-5) compared with MPEM-MFC II with 1896 +/- 15 mu W m(-2) (RO-16) and 1028 +/- 9 mu W m(-2) (RB-5). Decolorization efficiency of MPEM-MFC I was 98 +/- 1.2% (RO-16) and 95 +/- 2% (RB-5). Total phenazine production in MPEM-MFC I was 12.3 +/- 0.5 mu g mL(-1) higher than that of 8.9 +/- 0.05 mu g mL(-1) (MPEM-MFC II) and its production have positive influence of electron shuttling that brought out high power output. Addition of phenazine externally reduced the dye degradation. Bioadhesion capability of P. aeruginosa on the anode reduced the internal resistance in MFCs. Thus the implementation of MFC is a most promising technology for the complete decolorization of reactive azo dyes and it has potential economic benefits in real-life industrial application.