Multi-electrode microbial fuel cell with horizontal liquid flow

摘要

A plug flow multi-electrode bioelectrochemical reactor for wastewater treatment andnsimultaneous generation of electricity has been developed and its efficiency investigated.nIt employs a horizontally located anodic zone in which the anodic electrodes comprise porousngraphite plates coated with palladium. The aerated immersed cathodic electrodes contain iron(II)nphthalocyanine as a catalyst. The parameters of the device were obtained using glycerol andnacetate as fuels and anaerobic sludge as an inoculum. The maximal volumetric power andncurrent densities obtained, relative to the total volume of the anodic zone, were: glycerol:n73 ^ 1mA/L; 43 ^ 1mW/L; acetate: 75 ^ 1mA/L; 40 ^ 1mW/L. It was shown thatnbiotransformation of glycerol into volatile fatty acids does not depend on the presence of anodicnelectrodes in the reaction zone, while acetate degradation takes place only if the reaction zonencontains anodic electrodes as a final electron acceptor.