Wastewater collection: sewer system components, design of sanitary sewers, system layout and flow hydraulics. Sewage treatment: primary, secondary, tertiary processes. Wastewater microbiology: microorganism classification, population dynamics, kinetics of decomposition. Unit processes of secondary treatment: trickling filters, activated sludge, rotating biological contactors. Sludge management, treatment, and ultimate disposal. Experimental laboratory work involving sedimentation model, chemical treatment: coagulation and flocculation, nutrients, biochemical oxygen demand, and microscopic analyses of sludge.