Water Technology Lecture 6: Wastewater Treatment, Introduction to Unit Processes

Abstract

This is the sixth lecture in the course Water Technology dealing with the unit processes used in wastewater treatment and an introduction to the basis of biological treatment. This is a PowerPoint lecture which is free to use and modify. It was designed to be used in conjunction with the course text Gray, N.F. (2017) Water Science and Technology: An Introduction, published by CRC Press, Oxford. In the lecture the following are explored: aims of wastewater treatment; design; plant layout; unit process check list; preliminary treatment; primary treatment; sedimentation; secondary treatment; biological treatment; tertiary treatment; sludge treatment steps; screw pumps; grit separation; dissolved air flotation; screening; detritor; SCADA; effluent standards; bacteria classification; facultative bacteria; heterotrophs; autotrophs; aerobic; anaerobic; electron acceptors; electron donors