Dispersion analysis of SO2pollutant from cement industry (Case study of Kupang cement plant)

Abstract

One of the dangerous exhausted gases is sulphur dioxides (SO2). The SO2 emission produced by the cement industries can lead to negative effects to the quality of air environment. This research aimed to investigate the concentration of SO2 emission from the chimney of cement industry and its dispersion as well as to predict the dispersion patterns of SO2 gases based on Gaussian model. The samples were taken from six locations and the analysis of ambient concentrations of SO2 gases was determined using Pararosaniline Method. The emission pattern was analysed using Continuous Emission Monitoring System (CEMS) data. The dispersion patterns and an area dispersion were analysed using Gaussian model. The results showed that the SO2 emission was 1,51 mg/Nm3 and this result was still below the standard level according to Minister of Environment Regulation No. 13/1995. The maximum concentration of ambient air with the distance of 350 m from emission source was 726,769 μg/Nm3. This result met admissible standard of air quality according to Government Regulation No. 41 of 1999. The meteorological data from Meteorology Climatology and Geophysics Council (BMKG) Kupang showed that the atmospheric stability in the sampling area was classified as class B. An average wind speed and radiation were 4.08 m/s and 80%, respectively. The pattern of distribution of pollutants followed wind direction pattern in which the class of atmospheric stability and wind speed affected the pollutant concentration in certain. Based on Gaussian model, the area of pollutant distribution from could reach 6 km from emission source.