High-rate hydrogenotrophic denitrification in a fluidized-bed biofilm reactor using solid-polymerelectrolyte membrane electrode (SPEME)

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    10 Citations (Scopus)

    Abstract

    A fluidized-bed biofilm reactor equipped with a Solid-Polymer-Electrolyte Membrane Electrode (SPEME) cell was developed in order to enhance hydrogenotrophic denitrification of groundwater. Porous cubes made of polyvinylalcohol (PVA) were used as a biofilm carrier and continuous treatments using synthetic groundwater were carried out for 105 days. Electric current was changed step-wise from 0.4 to 4.0 A. Experimental results showed that efficient production and dissolution of hydrogen were achieved by application of electric current as well as high-rate denitrification simultaneously. Denitrification rates of nitrite increased with the increase of electric current. Overall denitrification rates attained to about 90 mg-N/L/h, which was 3 to 9 times as high as those reported in former studies. Supplying electric current of about two times of stoichiometric equivalent to the cell considered necessary for complete denitrification. Water quality in effluent was very stable and electrolytic voltage was low around 3 V. In addition, simple and secure operation was demonstrated over the experiment. From these results, it was concluded that the present fluidized-bed biofilm reactor equipped with a SPEME cell could be very feasible for high-rate hydrogenotrophic denitrification of ground water.

    Original languageEnglish
    Title of host publicationWater Science and Technology
    Pages1441-1446
    Number of pages6
    Volume58
    Edition7
    DOIs
    Publication statusPublished - 2008

    Publication series

    NameWater Science and Technology
    Number7
    Volume58
    ISSN (Print)02731223

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    Keywords

    • Biofilm
    • Fluidized bed
    • Groundwater
    • Hydrogenotrophic denitrification
    • Nitrate
    • SPEME

    ASJC Scopus subject areas

    • Environmental Engineering
    • Water Science and Technology

    Cite this

    Komori, M., & Sakakibara, Y. (2008). High-rate hydrogenotrophic denitrification in a fluidized-bed biofilm reactor using solid-polymerelectrolyte membrane electrode (SPEME). In Water Science and Technology (7 ed., Vol. 58, pp. 1441-1446). (Water Science and Technology; Vol. 58, No. 7). https://doi.org/10.2166/wst.2008.725