Abstract
Background: Different concentrations of the simple carbon substrates i.e. glucose, fructose, and sucrose were tested to enhance the performance of the mediator-less double chamber microbial fuel cell (MFC). Objectives: The power generation potential of the different electron donors was studied using a mesophilic Fe (III) reducer and non-fermentative bacteria Pseudomonas aeruginosa-isolated from municipal wastewater. Materials and Methods: A double chamber MFC was operated with three different electron donors including glucose, sucrose, and fructose. Substrate utilization pattern was determined through chemical oxygen demand (COD) removal rate and voltage generation. In addition, electrochemical, physicochemical, and microscopic analysis of the anodic biofilm was conducted. Results:P. aeruginosa was proven to effectively utilize hexose and pentose sugars through anode respiration. Higher power density was generated from glucose (136 ± 87 mWm2) lead by fructose (3.6 ± 1.6 mWm2) and sucrose (8.606 ± mWm2). Furthermore, a direct relation was demonstrated between current generation rate and COD removal efficiency. COD removal rates were, 88.5% ± 4.3%, 67.5% ± 2.6%, and 54.2% ± 1.9% with the three respective sugars in MFC. Scanning e...Continue Reading
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