title: Improvement of power generation using Shewanella putrefaciens mediated bioanode in a single chambered microbial fuel cell: effect of different anodic operating conditions.
abstract: Three different approaches were employed to improve single chambered microbial fuel cell (sMFC) performance using Shewanella putrefaciens as biocatalyst. Taguchi design was used to identify the key process parameter (anolyte concentration, CaCl₂ and initial anolyte pH) for maximization of volumetric power. Supplementation of CaCl₂ was found most significant and maximum power density of 4.92 W/m(3) was achieved. In subsequent approaches, effect on power output by riboflavin supplementation to anolyte and anode surface modification using nano-hematite (Fe₂O₃) was observed. Volumetric power density was increased by 44% with addition of 100 nM riboflavin to anolyte while with 0.8 mg/cm(2) nano-Fe₂O₃ impregnated anode power density and columbic efficiency increased by 40% and 33% respectively. Cyclic voltammetry revealed improvement in electrochemical activity of Shewanella with nano-Fe₂O₃ loading and electrochemical impedance depicted inverse relationship between charge transfer resistance and nano-Fe₂O₃ loading. This study suggests anodic improvement strategies for maximization of power output.
authors.affiliation: Department of Biotechnology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India.
authors.forename: Soumya
authors.initials: S
authors.lastname: Pandit
authors.affiliation: Materials Science Centre, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India.
authors.forename: Santimoy
authors.initials: S
authors.lastname: Khilari
authors.affiliation: Department of Biotechnology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India.
authors.forename: Shantonu
authors.initials: S
authors.lastname: Roy
authors.affiliation: Materials Science Centre, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India.
authors.forename: Debabrata
authors.initials: D
authors.lastname: Pradhan
authors.affiliation: Department of Biotechnology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India. Electronic address: ddas.iitkgp@gmail.com.
authors.forename: Debabrata
authors.initials: D
authors.lastname: Das
mesh_terms: D001674:Bioelectric Energy Sources; D056804:Biofuels; D003246:Conservation of Energy Resources / Q000379:methods*; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*; D020614:Shewanella putrefaciens / Q000737:chemistry*
chemical_list: D056804:Biofuels; D005290:Ferric Compounds; C000499:ferric oxide
keywords: Nano hematite; Riboflavin; Shewanella putrefaciens; Single chambered MFC; Taguchi optimization