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Treatment of airborne BTEX by a two-stage biotrickling filter and biofilter, exploiting selected bacterial and fungal consortia

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Abstract

The pilot plant fed by a 600-Nm3 h−1 waste air flow rate consisted of a water scrubbing pre-treatment followed by a biotrickling filter and a biofilter, in series. The growth of selected bacterial and fungal consortia was promoted through the biotrickling filter and biofilter. Total BTEX levels were detected in a raw waste air stream at an average concentration of 39.07 mg Nm−3. The whole treatment achieved an average of 96.1 % removal efficiency. This performance led to very low average concentrations of individual BTEX in the final air effluent: 1.07 mg Nm−3 for benzene, 0.16 mg Nm−3 for toluene, 0.22 mg Nm−3 for ethylbenzene and 0.07 mg Nm−3 for xylene (mix). The performance and stability of both biotrickling filter and biofilter confirmed the effectiveness of the treatment in achieving low concentrations of individual BTEX in the final air effluent, which fully comply with the most stringent toxicological standard and threshold odor concentrations, for the protection of workers and local residents. This result was possible by the complementary and synergistic action of the bacterial and fungal consortia in degrading BTEX.

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Acknowledgments

The authors wish to acknowledge AirClean Srl (Rho, Milan, Italy) for their technical support.

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Authors and Affiliations

  1. School of Industrial Engineering, LIUC-University Cattaneo, Corso Matteotti 22, 21053, Castellanza, VA, Italy

    M. Raboni

  2. Department of Biotechnologies and Life Sciences, University of Insubria, G.B. Vico, 46, 21100, Varese, Italy

    V. Torretta

  3. Department of Civil and Environmental Engineering, University of Roma “La Sapienza”, Via Eudossiana 18, 00184, Rome, Italy

    P. Viotti

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  1. M. Raboni
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Correspondence to P. Viotti.

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Editorial responsibility: M. Abbaspour.

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Raboni, M., Torretta, V. & Viotti, P. Treatment of airborne BTEX by a two-stage biotrickling filter and biofilter, exploiting selected bacterial and fungal consortia. Int. J. Environ. Sci. Technol. 14, 19–28 (2017). https://doi.org/10.1007/s13762-016-1127-8

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  • DOI: https://doi.org/10.1007/s13762-016-1127-8

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