Removal of BOD and COD from Coal-Slurry Transport Wastewater

The transport of coal-slurry through pipelines with water as carrier is a viable proposition. During transportation, water gets contaminated as a result of leaching of inorganic and organic carbon from coal. The biochemical and'chemical oxygen demand (BOD and COD respectively) of the wastewater generated in the laboratory were 59.49 mg/l and 343.0 mg/l respectively. Both activated and commercial charcoals were found to be effective in reducing the BOD and COD to acceptable levels. Adsorption kinetics studies were performed and Lagergren model was found to fit the data. Effects of temperature, pH and contact time on adsorption behaviour were also studied.