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PBDDs/Fs and PCDDs/Fs in the raw and clean flue gas during steady state and transient operation of a municipal waste combustor
Citation:
Wyrzykowska-Ceradini, B., B. K. GULLETT, D. TABOR, AND A. TOUATI. PBDDs/Fs and PCDDs/Fs in the raw and clean flue gas during steady state and transient operation of a municipal waste combustor . ENVIRONMENTAL SCIENCE AND TECHNOLOGY. ACS Publications, Washington, DC, 45(13):5853-5860, (2011).
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journal article
Description:
Concentrations of polybrominated dibenzo-p-dioxins and -dibenzofurans (PBDDs/Fs) and polychlorinated dibenzo-p-dioxins and -dibenzofurans (PCDDs/Fs) were determined in the pre- and post- air pollution control system (APCS) flue gas of a municipal waste combustor (MWC). Operational transients of the combustor were found to considerably increase levels of PBDDs/Fs and PCDDs/Fs compared to steady state operation, both for the raw and clean flue gas. The sum of PBDDs/Fs increased from 72.7 to 700 pg per dscm in the raw, pre-APCS gas and from 1.45 to 9.53 pg per dscm in the post-APCS flue gas. The sum of PCDDs/Fs increased from 240 to 960 ng per dscm in the pre-APCS flue gas, and from 1.52 to 16.0 ng per dscm in the post-APCS flue gas. The homologue profile of PBDDs/Fs and PCDDs/Fs in the raw flue gas (steady state and transients) was dominated by hexa- and octa- isomers, while the clean flue gas homologue profile was enriched with tetra- and penta-isomers. The efficiency of the APCS for PBDD/F and PCDD/F removal was estimated as 98.5% and 98.7%, respectively. The cumulative TEQ from the stack was dominated by PCDD/F: the TEQ of PBDD/F contributed less than 0.1% to total cumulative toxic equivalency of MWC stack emissions.
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PBDDS/FS AND PCDDS/FS IN THE RAW AND CLEAN FLUE GAS DURING STEADY STATE AND TRANSIENT OPERATION OF A MUNICIPAL WASTE COMBUSTOR
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