Volume 14, No. 4, June 2014, Pages 1223-1231 PDF(253 KB)
The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System
Ming-Wei Chen1, Ta-Chang Lin1, Lin-Chi Wang2, Guo-Ping Chang-Chien3,4
1 Department of Environmental Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan
2 Department of Civil Engineering and Geomatics, Cheng Shiu University, 840, Chengching Road, Kaohsiung 83347, Taiwan
3 Super Micro Mass Research and Technology Center, Cheng Shiu University, 840, Chengching Road, Kaohsiung 83347, Taiwan
4 Department of Cosmetic and Fashion Styling, Cheng Shiu University, 840, Chengching Road, Kaohsiung 83347, Taiwan
This study investigated the polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) removal efficiencies in two medical waste incinerators (MWIs) -MWI-A and MWI-B, with waste burning capacities of 9.12 and 12 tons per day, with dual-and single-bag filter systems, respectively. The PCDD/Fs in the stack flue gas and fly ashes of each air pollution control device (APCD) unit were collected concurrently. Based on mass balance, it was determined that the major PCDD/F removal occurred in the bag filter system with activated carbon injection (ACI). The total PCDD/F emission removal efficiencies for the whole dual-bag filter system, bag filter 1 (BF1), bag filter 2 (BF2) in MWI-A and the single bag filter system (BF) in MWI-B were 99.7%, 84.8%, 98.0%, 99.0% on the mass basis, respectively. The PCDD/F emission ratio (the escaped PCDD/F ratio after all APCDs) with the dual-bag filter system was over four times lower than that with a single bag filter. The results demonstrate a very efficient way to reduce the excess PCDD/F emissions incurred by intermittent operations and irregular waste feeding.
PCDD/F emissions; Medical waste incinerators; Dual bag filter; Activated carbon; Air pollution control devices.