Microsoft PowerPoint - Water Microbiology 2

Microsoft PowerPoint - Water Microbiology 2 - MICROBIOLOGY...

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Unformatted text preview: MICROBIOLOGY OF WATER MICROBIOLOGY OF WATER 2 BY S.M RAFIGH 2009 Purpose To sample lakes from the Clark State Forest • and test for E. Coli To test the samples for content of the water • See if there is any correlation between water • content and number of colonies grown Wilson Lake Dissolved O2: 68mg/l pH: 8.8 Acidity phenolphthalin acidity 200mg/l CaCO3 ○ CO2: 14.4mg/l Phosphate: 1ppm Coliform Count Wilson Lake • 11/30 Temp: 60’s – 45 • 11/3 Temp: 40’s – after a rain • 0• 10/25 Temp: 60’s – 37 • Bowen Lake Dissolved O2: 100mg/l pH: 8.1 Acidity phenolphthalin acidity 250mg/l CaCO3 ○ CO2: 16.1mg/l Phosphate: <1ppm Coliform count Bowen Lake • 11/30 Temp: 60’s – 73 • 11/3 Temp: 40’s – after a rain • 0• 10/25 Temp: 60’s – 78 • Banet Pond Dissolved O2: 82mg/l pH: 8.2 Acidity phenolphthalin acidity 150mg/l CaCO3 ○ CO2: 14.4mg/l Phosphate: 1ppm Coliform Count Banet • 11/30 Temp: 60’s – 4• 11/3 Temp: 40’s – after a rain • 0• 10/25 Temp: 60’s – 7• Observations No apparent correlation between E. Coli • growth and dissolved O2 No correlation between E. Coli growth and • phosphate content No correlation between pH and E. Coli • growth Seems to be a correlation between E. Coli • growth and CaCO3 content The higher content Bowen lake grew the most – The lowest content Banet Pond grew the least – Also seemed to be a correlation between • CO2 content and E. Coli growth The higher the content the more the growth – Conclusion The oldest lake grew the most E. Coli • E. Coli growth does not depend upon • dissolved oxygen, pH, or phosphate content in in the lakes. Growth most dependent upon calcium • carbonate content and the carbon dioxide content ...
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Microsoft PowerPoint - Water Microbiology 2 - MICROBIOLOGY...

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