Model predictions of ambient pollution concentration

Abstract

Knowing the major contributors to pollutant emission to the atmosphere, the effects of production capacity, wind velocity, stack height, stack diameter and stack gas exit velocity on emission and dispersion of pollutants were investigated using emission modelling and Gaussian Plume model for two chemical manufacturing industries at Agbara industrial estate in Ogun State. The results show that the emission loads of the pollutants associated with the use of industrial boiler and power generating plant are in decreasing order of magnitude as NO_x > CO > TSP > SO₂ > VOC > SO,sub>3 and NO_x > TSP > CO > HC > SO₂ respectively. The emission load of SO₂ is 74.6% in power generating plant, 25% in boiler and only 0.4% in sulphuric acid production. The higher the emission release height, the lower the downwind concentrations of the pollutants.Finally, this paper has revealed that the most significant source of pollution in industries is the power generating plant with an average of 87.0% NOx, 7.0% TSP, 4.5% CO, 1.0% HC and 0.5% SO₂.

Journal of Applied Science, Engineering and Technology Vol. 3(2) 2003: 23-29