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DatoValore
TitleCarbon and nitrogen removal and enhanced methane production in a microbial electrolysis cell
AbstractThe anode of a two-chamber methane-producing microbial electrolysis cell (MEC) was poised at +0.200 V vs. the standard hydrogen electrode (SHE) and continuously fed (1.08 gCOD/L d) with acetate in anaerobic mineral medium. A gas mixture (carbon dioxide 30 vol.% in N2) was continuously added to the cathode for both pH control and carbonate supply. At the anode, 94% of the influent acetate was removed, mostly through anaerobic oxidation (91% coulombic efficiency); the resulting electric current was mainly recovered as methane (79% cathode capture efficiency). Low biomass growth was observed at the anode and ammonium was transferred through the cationic membrane and concentrated at the cathode. These findings suggest that the MEC can be used for the treatment of low-strength wastewater, with good energy efficiency and low sludge production.
SourceBioresource technology 130, pp. 366–371
KeywordsMicrobial electrolysis cellBiocathodeMethane bioproductionAmmonium recoveryAnaerobic digestion
JournalBioresource technology
EditorElsevier Applied Science,, Barking, Regno Unito
Year2013
TypeArticolo in rivista
AuthorsVillano M., Scardala S., Aulenta F., Majone M.
Text272051 2013 Microbial electrolysis cell Biocathode Methane bioproduction Ammonium recovery Anaerobic digestion Carbon and nitrogen removal and enhanced methane production in a microbial electrolysis cell Villano M., Scardala S., Aulenta F., Majone M. a Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy b Water Research Institute IRSA CNR , National Research Council, Via Salaria Km 29.300, 00015 Monterotondo RM , Italy The anode of a two chamber methane producing microbial electrolysis cell MEC was poised at 0.200 V vs. the standard hydrogen electrode SHE and continuously fed 1.08 gCOD/L d with acetate in anaerobic mineral medium. A gas mixture carbon dioxide 30 vol.% in N2 was continuously added to the cathode for both pH control and carbonate supply. At the anode, 94% of the influent acetate was removed, mostly through anaerobic oxidation 91% coulombic efficiency ; the resulting electric current was mainly recovered as methane 79% cathode capture efficiency . Low biomass growth was observed at the anode and ammonium was transferred through the cationic membrane and concentrated at the cathode. These findings suggest that the MEC can be used for the treatment of low strength wastewater, with good energy efficiency and low sludge production. 130 Published version Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. federico.aulenta AULENTA FEDERICO TA.P07.017.002 Processi Aerobici e di Dealogenazione Riduttiva per la rimozione dei contaminanti dalle acque