Impact of Integrating Flameless Combustion Technology and Sludge–Fly Ash Recirculation on PCDE Emissions in Hazardous Waste Thermal Treatment Systems-Reference-Cited by-同舟云学术

Impact of Integrating Flameless Combustion Technology and Sludge–Fly Ash Recirculation on PCDE Emissions in Hazardous Waste Thermal Treatment Systems

Published:2024-06-14 Issue:6 Volume:15 Page:710
ISSN:2073-4433
Container-title:Atmosphere
language:en
Short-container-title:Atmosphere

Author:

Lin Sheng-Lun¹^ORCID,Duan Lu-Lu²,Wu Jhong-Lin³^ORCID,Huang Chien-Er⁴⁵,Song Meng-Jie²^ORCID

Affiliation:

1. Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan

2. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

3. Environmental Resource and Management Research Center, National Cheng Kung University, Tainan 70101, Taiwan

4. Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung 83347, Taiwan

5. Department of Mechanical Engineering, Cheng Shiu University, Kaohsiung 83347, Taiwan

Abstract

Polychlorinated diphenyl ethers (PCDEs), persistent environmental pollutants, are found in flue gas from incinerators. While air pollution control systems (APCSs) capture pollutants, the resulting sludge/fly ash (SFA) requires further treatment due to residual PCDEs and other harmful substances. This study investigated a hazardous waste thermal treatment system (HAWTTS) utilizing flameless combustion technology alongside a multistage APCS (scrubbers, cyclone demisters, bag houses). SFA from the APCS was recirculated for secondary combustion. PCDE levels were measured before and after each unit within the HAWTTS. The HAWTTS achieved a remarkable overall PCDE removal efficiency of 99%. However, the incinerator alone was less effective for low-chlorine PCDEs. Scrubbers and bag houses exhibited lower removal efficiencies (17.8% and 30.9%, respectively) due to the memory effect. Conversely, the cyclone demister achieved a high removal rate (98.2%). Following complete APCS treatment, PCDE emissions were significantly reduced to 1.02 ng/Nm3. While SFA still contained some PCDEs, the flameless combustion’s uniform temperature distribution enhanced combustion efficiency, minimizing overall PCDE emissions. This system demonstrates significant potential for mitigating PCDE pollution from incinerators. Further research could focus on optimizing treatment processes to address residual PCDEs in SFA.

Funder

National Science and Technology Council of Taiwan

Environmental Resource and Management Research Center, National Cheng Kung University

Publisher

MDPI AG

Link

https://www.mdpi.com/2073-4433/15/6/710/pdf

Reference73 articles.

1. Wu, Q., Wu, Q., Wang, X., Zhang, X., and Zhang, R. (2023). Polychlorinated Diphenyl Ethers in the Environment: A Review and Future Perspectives. Int. J. Environ. Res. Public Health, 20.

2. Koistinen, J. (2000). Polychlorinated Diphenyl Ethers (PCDE), Springer. Anthropogenic Compounds Part K.

3. Vapour pressures, aqueous solubilities, Henry’s law constants, partition coefficients between gas/water (Kgw), n-octanol/water (Kow) and gas/n-octanol (Kgo) of 106 polychlorinated diphenyl ethers (PCDE);Kurz;Chemosphere,1999

4. A polychlorinated dibenzofuran and related compounds in an estuarine ecosystem;Lake;Environ. Sci. Technol.,1981

5. Chlorinated diphenyl ethers in Great Lakes fish and their environmental implication;Niimi;Environ. Toxicol. Chem. Int. J.,1994