A raw wastewater is chlorinated before discharging into the environment. Due to potentially high counts of Fecal Coliform present in the raw wastewater, it was prediluted 10 times before carrying out MPN tests. The findings obtained from MPN tests are shown below: Sample 1 2 3 Dilution 10 1 0.1 Positive tube 5 3 5 You are asked to determine the expected killing efficiency of the chlorination proces: so that the treated wastewater can fulfill the discharge standard of 50 CFU/100mL.

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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A raw wastewater is chlorinated before discharging into the environment. Due to
potentially high counts of Fecal Coliform present in the raw wastewater, it was
prediluted 10 times before carrying out MPN tests. The findings obtained from MPN
tests are shown below:
Sample
1
2
3
Dilution
10
1
0.1
Positive tube
5
3
5
You are asked to determine the expected killing efficiency of the chlorination process
so that the treated wastewater can fulfill the discharge standard of 50 CFU/100mL.
Transcribed Image Text:A raw wastewater is chlorinated before discharging into the environment. Due to potentially high counts of Fecal Coliform present in the raw wastewater, it was prediluted 10 times before carrying out MPN tests. The findings obtained from MPN tests are shown below: Sample 1 2 3 Dilution 10 1 0.1 Positive tube 5 3 5 You are asked to determine the expected killing efficiency of the chlorination process so that the treated wastewater can fulfill the discharge standard of 50 CFU/100mL.
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