Hydrogen-dependent denitrification in a two-reactor bio-electrochemical system

S. Szekeres, I. Kiss, T. T. Bejerano, M. I.M. Soares

    Research output: Contribution to journalArticlepeer-review

    77 Scopus citations


    An autotrophic biological process was developed for the treatment of nitrate-contaminated drinking water. The system comprised of two steps: the water to be treated was first enriched with hydrogen (energy source) in the cathodic chamber of an electrochemical cell, and then denitrified in the bioreactor. The bioreactor was a packed bed of granulated activated carbon, and the water flow was directed in an upward continuous mode. The system was operated for one year, at various water velocities and current intensities. Denitrification rates up to 0.25kgNm-3d-1 were obtained at the hydraulic residence time of 1h. The system was stable. When detected in the effluent, the concentration of nitrite was low, even under conditions that resulted in the elution of very high concentrations of nitrate. Copyright (C) 2001 Elsevier Science Ltd.

    Original languageEnglish
    Pages (from-to)715-719
    Number of pages5
    JournalWater Research
    Issue number3
    StatePublished - 1 Jan 2001


    • Biological denitrification
    • Drinking water
    • Hydrogen
    • Water electrolysis
    • Water treatment

    ASJC Scopus subject areas

    • Water Science and Technology
    • Ecological Modeling
    • Pollution
    • Waste Management and Disposal
    • Environmental Engineering
    • Civil and Structural Engineering


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