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Unformatted text preview: . For test tubes 1, 2, 3, 4 and 7, the results are positive; . For test tubes 5 and 6, the results are negative; . Therefore, = We graph vs. concentrations and get the following chart. From the chart, we can tell that MPN is 0.2 cells / mL, which is 20 cells / 100mL. Comparing this to the undisinfected water bacterial concentration cells / L, which is cells / 100mL, the disinfection efficiency is N/N0 = 0.0002 = 2 , which is 4-log removal....
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This note was uploaded on 02/09/2010 for the course ENGIN 10 taught by Professor Johnson during the Fall '08 term at University of California, Berkeley.
- Fall '08