Electricity generation capacity and microbial community according to different pollutants in MFC

In this study, different experimental procedures were carried out to electric generation and identify the microbial species by using Microbial Fuel Cell (MFC). Different electrodes and membrane materials were used and then the contribution of electric generation of different mediators was investigated during the experimental studies. Throughout the thesis work, dominant microbial species also were identified in MFC. The obtained experimental data were used to determine microbial kinetics. Electric generation potential of domestic wastewater, oil industry wastewater and slaughterhouse wastewater were investigated. Performance of different proton exchange membranes, Fumapem F-1050, Nafion 117 and ULTREX CMI-7000, was investigated. According to the results of the study, the optimum concentration of methylene blue (MB) mediator were observed to be 300 ?M for all electrode materials. Using copper fabric electrode, the addition of 300 ?M MB provided the power dencity of 636 mW/m2 with a 5.7 fold increase in power. By using graphite electrode, 12 fold power increase was obtained with adding 200 ?M neutral red mediator. It was obtained three times higher power output using copper fabric electrode in comparison with classical electrode. MFC inoculated with anaerobic sludge produced 3 times higher power output than sediment sludge for oil wastewater. The highest performance was achieved with the Fumapem F-1050 in the study which the performances of the membrane were investigated. In the MFC, it was identified the presence of electrochemically active microbial species such as Geobacter, Shiwanella and Pseudomonas. As a result of bioelectrochemical modeling, the maximum current density and for different wastewater were ordered as Jmax slaughterhouse