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Emission Characteristics of Mercury and Heavy Metals from Coal and Waste Fuels

석탄과 폐기물 연료의 수은 및 중금속 배출 특성

  • Ahmad, Tanveer (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Min (Department of Environmental Engineering, Chungbuk National University) ;
  • Keel, Sangin (Department of Eco-Machinery System, Korea Institute of Machinery & Materials) ;
  • Yun, Jinhan (Department of Eco-Machinery System, Korea Institute of Machinery & Materials) ;
  • Park, Jeong Min (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Sang-Sup. (Department of Environmental Engineering, Chungbuk National University)
  • Received : 2017.01.17
  • Accepted : 2017.02.27
  • Published : 2017.04.30

Abstract

Waste can be utilized as secondary or alternative fuel. Solid recovered fuel (SRF) and dried sewage sludge were combusted to investigate heavy metal emissions from their combusiton in this study. Content of copper (Cu), chromium (Cr), cadmium (Cd), nickel (Ni), zinc (Zn), lead (Pb), arsenic (As) and mercury (Hg) of coal, SRF and dried sewage sludge were determined, respectively. Concentrations of these heavy metals in the combustion flue gas were also determined. As a result, emissions of gas-phase Cu, Cr, Cd, Ni, Zn, Pb and As compounds were found to be little. However, a significant amount of gas-phase Hg was emitted from combustion of coal, SRF and dried sewage sludge. While SRF showed a high mercury oxidation percentage in its combustion flue gas, dried sewage sludge showed a high level of gaseous mercury emission.

폐기물은 이차연료나 대체연료로 사용될 수 있다. 본 연구에서는 고형연료(SRF)와 건조 하수슬러지를 연소하여 배출되는 중금속 물질을 분석하였다. 석탄, SRF, 건조 하수슬러지의 구리(Cu), 크롬(Cr), 카드뮴(Cd), 니켈(Ni), 아연(Zn), 납(Pb), 비소(As), 수은(Hg) 함량을 조사하였고, 각 물질이 연소가스에서 가스상으로 존재하는 농도를 분석하였다. 실험결과, 가스상으로 배출되는 Cu, Cr, Cd, Ni, Zn, Pb의 양은 매우 적은 것으로 나타났다. 그러나 가스상 수은은 연소 배기가스에서 많은 양이 배출되었다. SRF는 연소 배기가스에서 높은 수은 산화도를 보였고, 건조 하수슬러지는 높은 수준의 수은 배출농도를 보였다.

Keywords

References

  1. Kim, W. H., 2003 : Fludized bed incineration technology for refuse derived fuel from municipal solid wastes, Final Report, Ministry of Trade, Industry and Energy, Korea.
  2. Kang, S. W. et al., 2012 : Mercury emission characteristics from co-combustion of coal and sludge, Korean Society for Atmospheric Environment, 28(2), pp. 182-189. https://doi.org/10.5572/KOSAE.2012.28.2.182
  3. Lee, H. Y., 2008 : A study on the characteristics and utilization of ash from sewage sludge incinerator, J. of Korean Inst. of Resources Recycling, 17(3), pp. 3-9.
  4. Choi, W. Z. et al., 2008 : Study on recycling of incombustion materials from MSWI fluidized bed incinerator ash, J. of Korean Inst. of Resources Recycling, 17(4), pp. 3-9.
  5. Cenni, R. et al., 1998 : Study on trace metal partitioning in pulverized combustion of bituminous coal and dry sewage sludge, Waste Manage., 18(6-8), pp. 433-444. https://doi.org/10.1016/S0956-053X(98)00127-5
  6. Corella, J. et al., 2000 : Incineration of doped sludges in fluidized bed. Fate and partitioning of six targeted heavy metals, J. Hazard. Mater., 80(1-3), pp. 81-105. https://doi.org/10.1016/S0304-3894(00)00280-6
  7. Zhang, H. et al., 2008 : Fate of heavy metals during municipal solid waste incineration in Shanghai, J. Hazard. Mater., 156(1-3), pp. 365-373. https://doi.org/10.1016/j.jhazmat.2007.12.025
  8. Belevi, H. et al., 2000 : Factors determining the element behavior in municipal solid waste incinerator. 1. Field studies : Environ. Sci. Technol., 34(12), pp. 2501-2506. https://doi.org/10.1021/es991078m
  9. Reimann, D. O., 1989 : Heavy metals in domestic refuse and their distribution in incinerator residues, Waste Manage. Res., 7(1), pp. 57-62. https://doi.org/10.1177/0734242X8900700107
  10. Lemann, M. et al., 1995 : Heavy metals in municipal solid waste incineration residues, J. Power Sources, 57(1-2), pp. 55-59. https://doi.org/10.1016/0378-7753(95)02241-4
  11. Jung, C. H. et al., 2004 : Metal distribution in incineration residues of municipal solid waste (MSW) in Japan, Waste Manag., 24(4), pp. 381-391. https://doi.org/10.1016/S0956-053X(03)00137-5
  12. Park, J. M. et al., 2016 : Combustion characteristics of coal and waste fuels by thermogravimetric analysis, J. of Korea Society of Waste Management, 33(5), pp. 1-6. https://doi.org/10.9786/kswm.2016.33.1.1
  13. Park, M. et al., 2017 : Nitrogen oxides emissions from the MILD combustion with the conditions of recirculation gas, J. Air Waste Manage. Assoc. in press.
  14. Lopez-Anton, M. A. et al., 2011 : Speciation of mercury in fly ashes by temperature programmed decomposition, Fuel Process. Technol., 92, pp. 707-711. https://doi.org/10.1016/j.fuproc.2010.12.002
  15. Ghorishi, S. B. et al., 2005 : Effects of fly ash transition metal content and flue gas HCl/$SO_2$ ratio on mercury speciation in waste combustion, Environ. Eng. Sci., 22, pp. 221-231. https://doi.org/10.1089/ees.2005.22.221
  16. Bhardwaj, R., Chen, X., and Vidic, R. D., 2009 : Impact of fly ash composition on mercury speciation in simulated flue gas, J. Air Waste Manage. Assoc. 59, pp. 1331-1338. https://doi.org/10.3155/1047-3289.59.11.1331