Abstract
Upon inoculation with Hyphomicrobium MS3, theelimination capacity of a lab-scale biofilter for theodorant dimethyl sulfide (Me2S) can be stronglyincreased from less than 10 to more than 35 and 1000 gm-3d-1 using wood bark and compost as acarrier material, respectively. However, uponsupplementation of isobutyraldehyde (IBA) as a secondgaseous substrate, sequential degradation profiles of IBAand Me2S in physically separated sections wereobserved in the Hyphomicrobium MS3-inoculatedwood bark and compost biofilters. Contrary to this, thebiofiltration efficiency for Me2S remainedunaffected upon the supplementation of toluene as asecond gaseous substrate. Batch experiments with theliquid Hyphomicrobium MS3 culture confirmed thecompetitive effect of IBA on the Me2S degradingactivity: in the presence of both compounds, Hyphomicrobium MS3 preferred degradation of thecarbonyl compound. In technical terms, this means thatthe complete purification of a waste gas stream containingboth IBA and Me2S should be performed usingsufficiently high or bistage HyphomicrobiumMS3-inoculated biofilters. Design criteria have to beconceived in this respect.
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Smet, E., Van Langenhove, H. & Verstraete, W. Isobutyraldehyde as a competitor of the dimethyl sulfide degrading activity in biofilters. Biodegradation 8, 53–59 (1997). https://doi.org/10.1023/A:1008201412862
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DOI: https://doi.org/10.1023/A:1008201412862