Emission inventory of non-road mobile machinery in Shenzhen

Abstract

In order to effectively improve the air quality and the livable level, emission control of non-road mobile machinery (NRMM) has become an important area of environmental governance. Based on the site investigation and data collection of NRMM in Shenzhen, we analyze the feature parameters of NRMM and establish the emission inventory. The results show that the emissions of NO_{<italic>x</italic>}, PM_2.5, PM₁₀, HC, CO, black carbon (BC), organic carbon (OC) and volatile organic compounds (VOC) are 6 162.0, 419.7, 442.3, 983.9, 4 170.7, 209.7, 64.4 and 920.2 t, respectively. In all types of NRMM, excavator emissions account for the highest proportion, reaching 28.06%. Among the eight pollutants, NO_{<italic>x</italic>} emissions account for the highest proportion, reaching 46.04% of the total emissions. Quantitative analysis of the uncertainty of <italic>NO</italic>_x emission inventory shows that the average value range of 95% confidence interval is (4 940.1, 7 661.2) t, and the uncertainty ranges from -21.1% to 22.6%. The research results can provide reference and suggestions for the control policy of air pollution and the establishment of emission inventory of NRMM.