1: Chapters Last updated Save as PDF Page ID 6951 Nick Steffen College of the Canyons via ZTC Textbooks 1.1: Basic Overview/Introduction To Wastewater Treatment 1.2: Wastewater Quality 1.3: Wastewater Collection 1.4: Preliminary Treatment 1.5: Primary Treatment 1.6: Biological Treatment Overview 1.7: Biological Treatment Methods 1.8: Activated Sludge