314 下水汚泥流動焼却炉の亜酸化窒素排出量の連続測定 (II)

抄録

This paper describes the result of field measurements of nitrous oxide (N_2O) emission from fluidized bed sewage sludge incinerators. Continuous monitoring of N_2O were done for 4 incinerators in 7∿14 days for each incinerator. N_2O emission was much changed with operation condition of incinerator. This results suggest that determination of N_2O emission factor by grab sampling or short term measurement may have low certainty. N_2O emission was almost determined by the free board temperature in the incinerator. It is possible to estimate the N_2O emission by the record of temperatures of incinerators. Seasonal difference in N_2O emission was observed in small capacity incinerator due to the change in free board temperature. Incinerators with the higher incineration capacity showed the higher N_2O emission factors. Emission factors obtained laid between 3700∿6400 g-N_2O/t- dry sludge. This value was much larger than the value published on "Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories" by IPCC.