waterborne diseases
Post on 21-Mar-2016
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Waterborne Diseases
• Water Quality• Coliform Counts• Lactose + gas• Extinction Dilution• Most Probable
Numbers – MPN• EMB agar
Fecal Coliform
• Fecal Coliform• Membrane Filter• E. coli counts• Enzyme substrate• MUG• IBGD• 100 ml• +/- Test
Wastewater
• 100-200 gal/day/person
• BOD• Biochemical Oxygen
Demand• Water Quality
Measure?
Sewage Treatment
• Primary Treatment• Settling Tank• Sludge• Septic Tank
Secondary TreatmentsAerobic
• Activated Sludge • Trickling Filters
Anaerobic Treatment
• Sludge Digesters• Methane • Vented or Used?
Other Treatments
• Biodiscs• Chlorine, Ozone, UV• Tertiary treatment
Drinking Water Purification
• Potable Water• Sedimentation Basin• Alum• Coagulation• Sand Filter• Chlorination
•Cholera
•Vibrio cholerae
•7 Pandemics
2 Biotypes
El Tor & Classic O-1
Waterborne Diseases
Legionnaires Disease
• Philadelphia 1976• Legionella
pneumophilia• Erythromycin• Complex Nutritional
requirements• Pontiac Fever
Protozoan Diseases
• Giardia lamblia• Cysts• 97% surface water• Cryptosporidium
parvum• 1993 Milwaukee• 403,000 cases
Other Waterborne Diseases
• Viruses• Polio, Hepatitis• Typhoid Fever • Salmonella typhi• Entamoeba histolytica• Amoebic Dysentery• Shigella dysenteriae
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