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Emission characteristics of dioxins, furans and polycyclic aromatic hydrocarbons during fluidized-bed combustion of sewage sludge
- Source :
- Journal of environmental sciences (China). 21(12)
- Publication Year :
- 2010
-
Abstract
- Pre-dried sewage sludge with high sulfur content was combusted in an electrically heated lab-scale fluidized-bed incinerator. The emission characteristics of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polycyclic aromatic hydrocarbons (PAHs) were studied. Coal and calcium oxide (CaO) were added during the sewage sludge combustion tests to optimize combustion conditions and control SO2 emission. The results indicated that the flue gases emitted during mono-combustion of sewage sludge were characterized by relatively high concentrations of SO2, NOx and organic pollutants, due to the high sulfur, nitrogen, and volatile matter content of sewage sludge. The total 16 USEPA priority PAHs and 2,3,7,8-substituted PCDD/Fs produced from sewage sludge combustion were found to be 106.14 microg/m3 and 8955.93 pg/m3 in the flue gas, respectively. In the case of co-combustion with coal (m(sludge)/m(coal) = 1:1), the 16 PAHs and 2,3,7,8-substituted PCDD/Fs concentrations were markedly lower than those found during mono-combustion of sewage sludge. During co-combustion, a suppressant effect of CaO on PCDD/Fs formation was observed.
- Subjects :
- Flue gas
Environmental Engineering
Sewage
business.industry
Polychlorinated dibenzodioxins
Oxides
General Medicine
Incineration
Calcium Compounds
Combustion
Dioxins
chemistry.chemical_compound
Coal
chemistry
Environmental chemistry
Environmental Chemistry
Fluidized bed combustion
Polycyclic Aromatic Hydrocarbons
business
Furans
Polychlorinated dibenzofurans
Sludge
General Environmental Science
Subjects
Details
- ISSN :
- 10010742
- Volume :
- 21
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Journal of environmental sciences (China)
- Accession number :
- edsair.doi.dedup.....334b3284e5967a376c6cc55107d487bb