Multiple choice

Anaerobically treated effluent has MPN of total coliform as 106/100 mL. After chlorination, the MPN value declines to 102/100 mL. The percent removal (%R) and log removal (log R) of total coliform MPN is

  1. %R = 99.90; log R = 4

  2. %R = 99.90; log R = 2

  3. %R = 99.99; log R = 4

  4. %R = 99.99; log R = 2
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C Correct answer
Explanation

 

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