Rate of Air Pollution Assessment from Manufacturing/Transformation Industries in Maiduguri Metropolis
In this paper, an assessment was made of the rates of air emissions from the manufacturing/transformation industries in Maiduguri city of Borno state, Nigeria. Applying the industry density technique to estimate the industry population while rate of fuel consumption is used to determine the rates of emissions of the various pollutants. The total number of industries in the city was found to be 3196, mostly comprising of small scale enterprises, with a few number of medium scale industries. The rates of emissions of CO, NMVOC, NOx, PM, N2O, NH3, Pb, CO2 and CH4 were found to be 2039 kg/day, 224 kg/day, 248 kg/day, 5 kg/day, 16 kg/day, 9 kg/day, 0 kg/day, 242351 kg/day, 396 kg/day respectively. Total greenhouse gases (GHG) stood at 256tCO2e/day or 93,440tCO2e/year. The emission per capita in Maiduguri was found to be 0.082 tCO2/cap as against the national value of 0.5 tCO2/cap in the manufacturing industry/construction sector. The industry emission in Maiduguri is about 0.2% of total national emissions from the manufacturing/transformation and construction industries. This shows that emissions contribution of the industry sector in Maiduguri to the national figure is not significant due to low industrial activities but a timely transition to sustainable low carbon energy sources remains crucial. It is recommended that small/medium industries in Maiduguri should have reliable and adequate statistical records in order to enhance the accuracy of further research.