Technical and economical analysis of the conversion of a full-scale scrubber to a biotrickling filter for odor control

David Gabriel, M. A. Deshusses

    Research output: Contribution to journalArticleResearchpeer-review

    36 Citations (Scopus)

    Abstract

    The present paper evaluates the technical and economical feasibility of converting wet chemical scrubbers to biotrickling filters for H2S control at the Orange County Sanitation District (OCSD), California. Results of 8 months of continuous operation of a biotrickling filter treating 16,000 m3h-1of foul air are analyzed. The reactor was operated at a gas contact time of 1.6 to 2.2 seconds reaching H2S elimination capacities up to 105-110 g H2S m-3h-1, consistently maintaining outlet concentrations well below the regulatory limits (24 h average of 1 ppmv) and demonstrating to be very robust against temporary changes. Also, a cost-benefit analysis of the conversion was performed. Savings from chemicals, energy and water usage compared to a chemical scrubber operated in parallel to the biotrickling filter throughout the project indicated that the payback time of the conversion was about 1.3 years. Cost savings ranged between US$ 40,000 per year, per scrubber. While the above number may be specific to OCSD conditions, the cost analysis suggests that there is a significant benefit of converting chemical scrubbers to biotrickling filters over a wide range of operating conditions. © IWA Publishing 2004.
    Original languageEnglish
    Pages (from-to)309-318
    JournalWater Science and Technology
    Volume50
    Issue number4
    Publication statusPublished - 4 Oct 2004

    Keywords

    • Biotower
    • Biotrickling filter
    • Chemical scrubber conversion
    • Cost-benefit analysis
    • Hydrogen sulfide
    • Operating costs

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