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The Development of N2O Emission Factor at Municipal Solid Waste Incinerator

도시고형폐기물 소각시설의 N2O 배출계수 개발

  • Received : 2018.12.19
  • Accepted : 2019.01.29
  • Published : 2019.03.30

Abstract

In this study, nitrous oxide ($N_2O$) emission concentration was measured 3 times continuously for 24 hours from August 27, 2018 to October 22, 2018 and non-dispersive infrared (NDIR) spectrometer was used to calculate $N_2O$ concentration of exhaust gas from municipal solid waste (MSW) incinerator. As a result of $N_2O$ emission characteristics, it is estimated that $N_2O$ emission concentration is due to the difference of furnace temperature, oxygen concentration rather than the chemical component of waste. The measured $N_2O$ emission concentration of MSW incinerator was obtained in the range of 53.6 ~ 59.5 ppm and the total average concentration was measured 55.6 ppm. Therefore, the amount of $N_2O$ emissions calculated from the $N_2O$ concentration was $98.05kg\;day^{-1}$ on average and the amount of $N_2O$ distribution in the range of $90.41{\sim}108.44kg\;day^{-1}$ was obtained. As a result, the $N_2O$ emission factor of the MSW incinerator was estimated to be $1,066.13g_{N_2O}\;ton_{waste^{-1}}$. The estimated $N_2O$ emission factor of the MSW incinerator was 20 times higher than calculated emission factor used in the Tier 2 method. Consequently, it is considered that the method of calculating the amount of $N_2O$ emission in the MSW incineration facilities using waste type and incineration amount needs to be supplemented to ensure accuracy.

Keywords

Waste incineration;Nitrous oxide;Municipal solid waste;Emission factor

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Figure 1. N2O sampling schematic diagram of the municipal solid waste incinerator.

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Figure 2. Trend of actual measured N2O concentration in the object incineration.

Table 1. Equipment specification of municipal solid waste incinerator

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Table 2. N2O concentration of municipal solid waste incineration plant

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Table 3. N2O emission characteristics for waste incineration

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Table 4. Elemental compositions of municipal solid waste and sewage sludge cake

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Table 5. N2O emission factor of municipal solid waste incineration plant

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Acknowledgement

Supported by : 시흥녹색환경지원센터