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Dioxin emissions after installation of a polishing wet scrubber in a hazardous waste incineration facility
Authors:Löthgren Carl-Johan  van Bavel Bert
Institution:Department of Natural Sciences, Man-Technology-Environment Research Centre, Orebro University, SE-701 82 Orebro, Sweden. carl-johan.lothgren@sakab.se
Abstract:Dioxin levels measured after wet scrubbing systems have been found to be higher than levels measured before the scrubber. It is believed that there is an adsorption of PCDD/Fs on plastic materials in the scrubber. The PCDD/F levels after a polishing wet scrubber were followed continuously for 18 months using long-time sampling equipment at a hazardous waste incineration facility in Sweden. Each sampling period lasted two weeks. It was found that the levels during and shortly after start-up periods were elevated. The decline was very slowly, which supports a memory effect in the scrubber. Further, a multivariate model showed that the relation between different homologues changed over time, which is in agreement with a desorption model, taking into account the vapour pressures for different congeners.
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