5547
Rehab Hamdy Mahmoud Elsayed
Bioelectrochemical studies on bacteria and microalgae for bioelectricity generation
Bacteria, microalgae, SCMFC, DCMFC, nanomaterials, Enterobacter cloacae, O. agardhii
Microbial fuel cells (MFCs) are bioelectrochemical systems where microorganisms catalyze chemical energy conversion to electricity through oxidation of organic carbon substrates. In the present study, MnO2 nano-rods were selected for capturing of exoelectrogens which will be used for the construction of mediator-less single chambered MFC. The electrochemical activities of the matured biofilm formed on the MnO2 modified electrode confirmed the direct electron transfer. From several mixed bacterial cultures, three bacterial strains were identified from the surface of the modified electrodes. Among the identified strains, Enterobacter cloacae DSM 30054 that showed the highest electrochemical signals. Electrocatalytic degradation of organic substrates and the productions of bioelectricity in SCMFC demonstrated the power density of 52.8 mW/m2. Furthermore, it was shown that the co-culture of Enterobacter sp. produced the highest power density (157mW/m2) compared to the pure and raw culture in MFC. Referring to degradable substrate, glucose was the best carbon source for Enterobacter sp whereas increasing glucose concentration decrease microbial activities.
2018
Ph.d
Ain Shams
Science