Pakistan National Refinery Limited

Solid Waste Management: A Case Study of National Refinery Limited

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Courtesy of Pakistan National Refinery Limited

Investigations have been carried out to assess and characterize the waste being generated in one of the largest petrochemical refinery of Pakistan. It was found that the refinery complex generates about 2000 metric tons of solid waste and about 0.55 million gallons of waste water per day. Besides these gaseous pollutants like H2S, CO, CO2 NO2, and particulate matter are also emitted in the atmosphere. Solid waste consisted of municipal waste, sludges from the API oil water separator, storage tank bottoms, cooling water tower and other discarded materials. Samples were also collected from combined sludge dumping area in the factory premises and analysed using the standard methods. The result shows that sludges on the average contained sulfur (0-1.26 wt%), lead (0-0.156 wt%), Iron (0.01-3.4%), chromium (0-0.159), copper (0-0.05 wt%) cadmium (0-0.0034 wt%), Nickel (0-0.168 wt%) and manganese (0.0015-0.0776 wt%).

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