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: Design and construction of sewers, quantity of sewage, and sewer appurtenances. Treatment Processes Preliminary/Primary : Screening and sedimentation tanks. : Biological processes like Filtration and the Activated Sludge Process : Advanced treatment for specific pollutants. Disposal & Management : Natural methods of sewage disposal and sludge treatment. Environmental Engineering : Includes sections on Air Pollution Noise Pollution to provide a complete environmental overview. Related Volumes bc punmia waste water engineering pdf full