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    Laboratory Scale Investigations of Potential Odour Reduction Strategies in Biosolids

    187826_67162_Gruchlik_et_al_Water_Journal_paper.pdf (217.5Kb)
    Access Status
    Open access
    Authors
    Gruchlik, Yolanta
    Heitz, Anna
    Joll, Cynthia
    Driessen, Hanna
    Fouche, L.
    Penney, N.
    Charrois, Jeffrey
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Gruchlik, Y. and Heitz, A. and Joll, C. and Driessen, H. and Fouche, L. and Penney, N. and Charrois, J. 2012. Laboratory Scale Investigations of Potential Odour Reduction Strategies in Biosolids. Water (Melbourne). 39 (7): pp. 58-64.
    Source Title
    Water
    ISSN
    03100367
    Remarks

    Copyright © 2012 Australian Water Association

    URI
    http://hdl.handle.net/20.500.11937/41039
    Collection
    • Curtin Research Publications
    Abstract

    This study investigated sources of odours from biosolids produced from a Western Australian wastewater treatment plant and examined potential odour reduction strategies on a laboratory scale. Odour reduction methods that were trialled included chemical additions and reduction of centrifuge speed. Chemical addition trials were conducted by adding alum, polyaluminium chloride or ferric chloride to digested sludge that had been sampled prior to the dewatering stage. Trials of chemical addition (alum) to plant dewatered cake were also undertaken. The impact of reducing centrifuge speed on biosolids odour was also investigated using a laboratory scale centrifuge calibrated to operate such that the shear forces on the sample would, as closely as possible, represent those on the plant. To identify the odorous compounds present in biosolids and to assess the effectiveness of the odour reduction measures, headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS SPME-GC-MS) methods were developed. Target odour compounds included volatile sulphur compounds (e.g. DMS, DMDS, DMTS) and other volatile organic compounds (toluene, thylbenzene, styrene, p-cresol, indole, skatole and geosmin). In our laboratory trials, aluminium sulphate added to digested sludge prior to dewatering offered the best odour reduction strategy among the options that were investigated, resulting in approximately 40% reduction in peak concentration of the total volatile organic sulphur compounds (TVOSC), relative to a control sample.

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