Improvement and Stable High Bioelectricity Generation Using Alkaliphilic Oceanobacillus iheyensis BS1₂ in Microbial Fuel Cells and Effect of Different Anodic Operating Conditions

Abstract

Microbial fuel cells (MFCs), which can be use bacterial cultures as biocatalyst for the conversion of chemical energy into the electricity from the biomass. The bacteria that can be able to synthesis [1,2] the electron from biodegradation of organic content and transfer the electron are known as exoelectrogen [3]. Now a days the extensive work is performed on the many exoelectrogen in MFCs which were Gram-negative and most exoelectrogens are cultivated in MFCs under 7 pH such as Klebsiella pneumoniae, Desulfobulbus propionicus, Geobacter sulfurreducens, Rhodoferax ferrireducens, Aeromonas hydrophila and Shewanella putrefaciens [4-9]. The extensive bacterial cultures that have been examined as biocatalyst for the bioelectricity generation in MFC comprise the pure culture of aerobic and anaerobic bacteria and consortial diverse cultures from sea floor sediments [10] and wastewater [11-12]. For direct bio electricity generation in MFC, the ideal bacterial culture must be able to grow aerobically and be electrochemically active, utilizing an anode as an alternative electron acceptor while oxidizing metabolites of various carbon sources. But very less studies have been reported using Gram-positive bacteria as biocatalyst in MFCs like Corynebacterium sp. strain MFC03 [13] Thermincola ferriacetica Z-0001 [14] and Bacillus subtilis [15], Clostridium butyricum EG3 [16], were performed to be enable producing bioelectricity. Electrochemical mechanisms have been used in different fields of biotechnology including biosensors, bioelectrochemical synthesis and biofuel cells [17]. Electricity can be generated directly from sewage sludge with microbial fuel cells (MFCs), combining degradation of organic matter and MFC for the generation of bioelectricity and the degradation of sewage sludgeorganic matter under the alkaline condition studied by Yuan et al. A group of bacteria from the extremophiles that has been tested only to a lower range in MFCs. Extremes such as in pH, salinity, temperature and alkalinity, when combined with materials that perform best under such circumstances would able to result in more graceful MFCs [18]. The search for bacteria that function optimally at higher pH and thereby would have higher catalytic rates was the aim of the present study. Electricity generation by anaerobic bacteria and anoxic sediments from hypersaline soda lakes was studied by Miller and Oremland. The objectives of this Research Article

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Identifiers

DOI

10.36876/aamb.1010

Journal

Annals of Applied Microbiology & Biotechnology Journal

Year

2018