Volume 3, No. 1, June 2003, Pages 1-6 PDF(109 KB)
Emissions of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans from the Incinerations of Both Medical and Municipal Solid Wastes
Wei-Shan Lee1, Guo-Ping Chang-Chien1, Lin-Chi Wang2, Wen-Jhy Lee2, Perng-Jy Tsai3, Che-Kuan Chen4
1 Department of Chemical Engineering, Cheng-Shiu University. 840, Chengching Rd., Kaohsiung 833, Taiwan, ROC
2 Department of Environmental Engineering, National Cheng Kung University. 1, University Rd., Tainan 70101, Taiwan, ROC
3 Graduate Institute of Environmental and Occupational Health, Medical College, National Cheng Kung University. 138, Sheng-Li Rd., Tainan 70428, Taiwan, ROC
4 Southern Incinerator Plant, Department of Environmental Protection, Kaohsiung Municipal Government, 6, Bei-Lyn Rd., Kaohsiung 812,Taiwan, ROC
Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from the stack flue gases of four medical waste incinerators (MWIs) and ten municipal solid waste incinerators (MSWIs) were investigated. The mean PCDD/F concentrations in the stack flue gases of these MWIs and MSWIs is 0.521 ng I-TEQ/Nm3 and 0.0533 ng I-TEQ/Nm3, respectively. In the stack flue gases of MWIs, OCDD, 1,2,3,4,6,7,8-HpCDD, 1,2,3,4,6,7,8-HpCDF and OCDF were the major congeners, while in MSWIs, OCDD and 1,2,3,4,6,7,8-HpCDD were the major ones. The mean PCDD/F emission factors (20.1 μg I-TEQ/ ton-waste) of the MWIs was about 210 times of magnitude higher than that of MSWIs, which was 0.0939 μg I-TEQ/ton-waste. In Taiwan, the annual emissions of PCDD/Fs from MWIs and MSWIs are 0.371 g I-TEQ/year and 0.737 g I-TEQ/year, respectively. Although the contribution of PCDD/Fs from MWIs to the atmosphere was 50.3% of that from MSWIs, it should be noted that most MWIs are equipped with a low stack and are situated in the proximity of the residential area and PCDD/F emissions from MWIs could significantly affect its surrounding environment.
PCDD/Fs; Emission factor; Incineration; Municipal solid waste, Medical waste.