Towards an integrated system for bio-energy: hydrogen production by Escherichia coli and use of palladium-coated waste cells for electricity generation in a fuel cell

R. L. Orozco, M. D. Redwood, P. Yong, I. Caldelari, F. Sargent, L. E. Macaskie

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    30 Citations (Scopus)

    Abstract

    Escherichia coli strains MC4100 (parent) and a mutant strain derived from this (IC007) were evaluated for their ability to produce H-2 and organic acids (OAs) via fermentation. Following growth, each strain was coated with Pd(0) via bioreduction of Pd(II). Dried, sintered Pd-biomaterials ('Bio-Pd') were tested as anodes in a proton exchange membrane (PEM) fuel cell for their ability to generate electricity from H-2. Both strains produced hydrogen and OAs but 'palladised' cells of strain IC007 (Bio-Pd-IC007) produced similar to threefold more power as compared to Bio-Pd-MC4100 (56 and 18 mW respectively). The power output used, for comparison, commercial Pd(0) powder and Bio-Pd made from Desulfovibrio desulfuricans, was similar to 100 mW. The implications of these findings for an integrated energy generating process are discussed.

    Original languageEnglish
    Pages (from-to)1837-1845
    Number of pages9
    JournalBiotechnology Letters
    Volume32
    Issue number12
    DOIs
    Publication statusPublished - Dec 2010

    Keywords

    • Biohydrogen
    • Escherichia coli
    • Fuel cell
    • Palladium
    • FERMENTATIVE LACTATE-DEHYDROGENASE
    • BIOHYDROGEN PRODUCTION
    • INACTIVATION
    • STRATEGIES

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