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Development and testing of bioelectrochemical reactors converting wastewater organics into hydrogen peroxide

Oskar Modin (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; K. Fukushi
Water Science and Technology (0273-1223). Vol. 66 (2012), 4, p. 831-836.
[Artikel, refereegranskad vetenskaplig]

In a bioelectrochemical system, the energy content in dissolved organic matter can be used to power the production of hydrogen peroxide (H2O2), which is a potentially useful chemical at wastewater treatment plants. H2O2 can be produced by the cathodic reduction of oxygen. We investigated four types of gas-diffusion electrodes (GDEs) for this purpose. A GDE made of carbon nanoparticles bound with 30% polytetrafluoroethylene (PTFE) (wt./wt.C) to a carbon fiber paper performed best and catalyzed H2O2 production from oxygen in air with a coulombic efficiency of 95.1%. We coupled the GDE to biological anodes in two bioelectrochemical reactors. When the anodes were fed with synthetic wastewater containing acetate they generated a current of up to similar to 0.4 mA/mL total anode compartment volume. H2O2 concentrations of similar to 0.2 and similar to 0.5% could be produced in 5 mL catholyte in 9 and 21 h, respectively. When the anodes were fed with real wastewater, the generated current was similar to 0.1 mA/mL and only 84 mg/L of H2O2 was produced.

Nyckelord: bioelectrochemical systems, hydrogen peroxide, microbial fuel cell, microbial fuel-cells, generation, oxygen

Denna post skapades 2012-09-06. Senast ändrad 2014-09-02.
CPL Pubid: 163009


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Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik



Chalmers infrastruktur