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