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H2S Emissions from a Submerged Pilot-Scale Fixed Bed Biofilm Reactor

Authors

  • Ana Lorena Esteban-García,

    Corresponding author
    1. Group of Environmental Engineering, Department of Sciences and Techniques of Water and the Environment, University of Cantabria, Spain
    • Group of Environmental Engineering, Department of Sciences and Techniques of Water and the Environment, University of Cantabria, Avda. de los Castros s/n, 39005 Santander (Cantabria), Spain
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  • Raquel Lebrero,

    1. Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain
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  • Manuel Alejandro de los Santos,

    1. Group of Environmental Engineering, Department of Sciences and Techniques of Water and the Environment, University of Cantabria, Spain
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  • Raúl Muñoz,

    1. Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain
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  • Juan Ignacio Tejero

    1. Group of Environmental Engineering, Department of Sciences and Techniques of Water and the Environment, University of Cantabria, Spain
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Abstract

A study was performed in two submerged, pilot-scale biofilm bioreactors operated under different conditions to determine the relationship between the operating parameters and H2S emission. H2S was always detected in the exhaust air at concentrations varying from 1 to 353 ppmv. The specific aeration rate was the most influencing parameter, with As < 30 equation image kg CODmath image (dissolved oxygen concentrations <4 mg L−1) increasing noticeably the H2S production. The periodical removal of the accumulated sludge reduced H2S emissions by ∼14%.

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