### Determine the controlling ct factor at the water temperature

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##### Reference no: EM13310412

A small city is evaluating disinfection requirements for their drinking water plant. With an average flow of 5 MGD and a peak flow of 9 MGD, determine the controlling CT factor (virus or giardia) when the water temperature is 23 degrees C. Typical pH during treatment is 7.75. In addition to comparing and determining controlling CT, compare sizes of clearwell(s) needed for achieving compliance WITH partial credit for turbidity removal and WITHOUT partial credit. Finally, look at the required volume of clearwell needed to comply during peak flow - assuming chlorine residual of 1.2 mg/L and average baffling in the clearwell. Assess the volume required if the baffling is superior.

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