In this study, the author monitored the atmospheric conditions both inside and outside municipal solid waste(MSW) collecting stations in Haidian District of Beijing. In addition, their safe protective distance was explored based on an atmospheric dispersion model. The results showed that distribution of MSW collecting stations were uneven in Haidian District. The indexes of H2S, NH3, SO2, NO2, carbon disulphide, styrene, TSP, CO and the others were in line with China’s relevant emission standards. However, the concentrations of trimethylamine, Me mercaptan, di-Me sulphide, di-Me disulphide and odour inside the station were 15-98.6 times, 53-293 times, 2.7-10.8 times, 2-17.9 times and 1.5-2.3 times higher than the standard limit separately. Although the concentrations of H2S, NH3 and odour changed little between inside and outside collecting stations, the concentrations of trimethylamine, Me mercaptan, di-Me sulphide, di-Me disulphide outside the station were only 0.17%-1.11%, 0.34%-1.89%, 0.29%-2.44%, 0.43%-3.85% of them inside collecting stations. With the amounts of MSW collecting stations increased, various concentrations of air pollutants also significantly increased. The author concluded that the atmospheric diffusion calculation show that the safe protective distance of MSW collecting stations was 50m.
Author: Li, Chun-ping ;Full Source: Chengshi Huanjing Yu Chengshi Shengtai 2011, 24(3), 39-42 (Ch) ;