Tracking of Shewanella oneidensis MR-1 biofilm formation of a microbial electrochemical system via differential pulse voltammetry. (April 2018)

• Record Type: Journal Article
• Authors: Choi, Serah; Kim, Bongkyu; Chang, In Seop
• Is Part Of: Bioresource technology. Volume 254(2018)
• Page Start: 357
• Page End: 361
• Publication Date: 2018-04
• Subjects: Biofilm formation -- Electron transport system -- Microbial electrochemical system -- Shewanella -- Bio-anode; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.01.047
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: S. oneidensis MR-1 was found to form a multi-layered biofilm. Over time, long-distance EET of the biofilm became activated. As the biofilm grew, EET via a flavin-like mediator became dominant. The measured current density was greater than that of dense single-layered biofilm. Abstract: In this study, the electrochemical properties of a Shewanella oneidensis MR-1 biofilm were investigated using a mini-microbial electrochemical system. The performance of the biofilm was shown, using discharge test and cyclic voltammetry investigations, to improve over time. Differential pulse voltammograms were also acquired to determine the type of extracellular electron transfer that took place and to characterize the structure of the microbial biofilm formed on the electrode of the electrochemical system. These results indicated that extracellular electron transfer via a flavin-like mediator chemical predominated as the biofilm grew. The results, combined with a comparison of the measured current density with the calculated value of a seamless single-layered biofilm, also suggested that S. oneidensis MR-1 formed a multi-layered biofilm on the electrode.