Kenji Yasuda* and Yukio Ootsuka**

* Kanagawa Prefectural Environmental Research Center
** Administrative Center of Shoonan District

+ Correspondence should be addressed to Kenji Yasuda:
(88-5 Minami-kibogaoka, Asahi, Yokohama 241 Japan)

Abstract

Our basic research was conducted on solid waste of regulated composition for examination of combustion properties. The emission behaviors of Thermal and Fuel NOx was studied using an incinerator under different combustion conditions. The following results were obtained. (1) The conversion rate of Fuel NOx increased at high combustion temperature and concentration of O2. (2) The conversion rate of Fuel NOx, initially present at 1.7 to 9.3%, became less than 1/3 that of boiler burning fossil fuel. (3) The emission of Fuel and Thermal NOx was inhibited with decrease in O2 in the burning area. Fuel NOx decreased 2 to 5 times more than that of Thermal NOx. (4) As for combustion temperature, Thermal NOx was found to be more dependent on temperature than Fuel NOx.

Key words: Fuel NOx, Thermal NOx, emission behavior, conversion rate, municipal solid waste incineration