Basic Research on the Emission of Polycyclic Aromatic Hydrocarbons caused by Waste Incineration |
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| Authors: | Kenji Yasuda Mikihiro Kaneko Hidekichi Yoshino Kooji Sugiyama Yukio Ootsuka |
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| Institution: | 1. Environmental Research Center of Kanagawa Prefecture , Yokohama , Japan;2. Public Health Laboratory of Kanagawa Prefecture , Yokohama , Japan;3. Administrative Center of Kenoo District , Atsugi City , Japan;4. Administrative Center of Shoonan District , Hiratsuka City , Japan |
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| Abstract: | The emission of polycyclic aromatic hydrocarbons (PAH) caused by municipal waste incineration varies according to waste composition and operating parameters such as furnace temperature and excess air. However, to obtain a sample sufficient to measure the emission of PAH at trace levels, it is necessary to operate the incinerator for many hours. Since during these lengthy periods it has not always been possible to maintain stable conditions, it is very difficult to determine the relationship between the emission and waste composition. In our basic research, therefore, we used municipal waste with an artificially regulated composition for our combustion experiments, and by using an experimental Incinerator we examined the emission behavior of PAH with respect to changes in waste composition and combustion conditions. The following facts were revealed by the results: ? The PAH found in the flue gas were predominantly the more volatile compounds. ? When municipal waste was incinerated at over 850 °C, the concentration of PAH in the flue gas increased rapidly as the proportion of plastics in the waste increased from 0 to 24 percent. ? The elimination of plastics from municipal waste by separate collection and the improvement of combustion conditions can effectively diminish the emission of PAH. |
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