Upload
leon-roberts
View
215
Download
2
Embed Size (px)
Citation preview
Review of Environmental Engineering II
Water quality management
• Water pollutants sources– Point sources– Nonpoint sources
• Water pollutants– Oxygen demanding material– Nutrients– Pathogenic organisms– Suspended solids– Salts– Toxic metals– Heat– ….
Water quality management
• Water quality management in rivers– Effect of pollution on river – Effect of oxygen-demanding waste on rivers• Biochemical Oxygen Demand ( BOD)• COD
– DO sag curve• Oxygen deficit• DO sag equation
– Management strategy
Water treatment
• Importance of water• Characteristics of water – Physical – Chemical – Microbiological – Radiological
• Water standard• Water classification– Ground water– Surface water
Water treatment• Treatment systems– Water treatment facilities– Treatment process• Coagulation• Softening
– Lime-Soda Softening– Ion-exchange softening
• Mixing and flocculation• Flocculation• Sedimentation• Filtration• Disinfection
– Other treatment process of drinking water
Wastewater treatment• Perspective• Characteristic of domestic wastewater• On-site disposal systems– Septic system
• Municipal wastewater treatment system– Pretreatment– Primary treatment– Secondary treatment– Advanced wastewater treatment
• Sludge treatment