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Articolo RSE 14008345

Anodic and cathodic microbial communities in single chamber microbial fuel cells

Articolo

New Biotechnology, vol. 32, N. 1, pp. 79-84, Gennaio-2015.

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M. Daghio (Università Bicocca Milano), I. Gandolfi (Università Bicocca Milano), G. Bestetti (Università Bicocca Milano), E. Guerrini (Università di Milano), P. Cristiani (RSE SpA)

EFFICIENZA 2014 - Risparmio di energia elettrica nei settori: civile industria e servizi

La tecnologia delle celle a combustibile microbiche (MFC) è in rapido sviluppo. In una MFC, un biofilm batterico ossida la sostanza organica o biomassa residuale tramite un trasferimento elettronico estracellulare dall’anodo al catodo.

Microbial fuel cells (MFCs) are a rapidly growing technology for energy production from wastewater and biomasses. In a MFC, a microbial biofilm oxidizes organic matter and transfers electrons from reduced compounds to an anode as the electron acceptor by extracellular electron transfer (EET). The aim of this work was to characterize the microbial communities operating in a Single Chamber Microbial Fuel Cell (SCMFC) fed with acetate and inoculated with a biogas digestate in order to gain more insight into anodic and cathodic EET. Taxonomic characterization of the communities was carried out by Illumina sequencing of a fragment of the 16S rRNA gene.

Microorganisms belonging to Geovibrio genus and purple non-sulfur (PNS) bacteria were found to be dominant in the anodic biofilm. The alkaliphilic genus Nitrincola and anaerobic microorganisms belonging to Porphyromonadaceae family were the most abundant bacteria in the cathodic biofilm.

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