Destruction of Trace PCBs Contained in Oil Using Incineration Technology

DOI Web Site 12 References
  • Oguchi Masahiro
    Institute of Environment and Resource Systems Inc.
  • Urano Kohei
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Yoneda Kazumasa
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Orito Isamu
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Kato Mika
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Kobayashi Takeshi
    Center for Risk Management and Safety Sciences, Yokohama National University

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Other Title
  • 微量ＰＣＢ含有油の焼却無害化処理条件の検討
  • ビリョウ PCB ガンユウユ ノ ショウキャク ムガイカ ショリ ジョウケン ノ ケントウ

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Abstract

In Japan, there is a large amount of insulating oil that contains traces of polychlorinated biphenyls (PCBs) in transformers, capacitors and other electrical equipment, and these PCBs need to be destroyed appropriately and economically. In this study, we conducted experiments on destroying trace PCBs in oil through incineration in a small furnace at relatively low temperatures between 700 and 950 degrees Celsius in order to examine the possibility of destroying them at ordinary industrial waste incineration facilities.<BR>As a result, we found that the presence of hydrocarbons affects the destruction of trace PCBs much more than the temperature or gas residence time in the furnace. Incinerating with hydrocarbons at a temperature of over 800 degrees Celsius and a residence time of over 2 seconds, traces of PCBs contained in oil can be destroyed with a very high destruction efficiency of over 99.9999%, reducing the concentration in the incineration gas to much lower than the threshold values for industrial hygiene and environmental air quality in Japan. From these results, we believe that traces of PCBs contained in oil can be adequately destroyed by incineration in ordinary industrial waste incineration facilities because a large amount of hydrocarbons surely coexist (in the form of oil) with the traces of PCBs.

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