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Unformatted text preview: of 200, 000 gpd. . What is its hydraulic residence time? 5) You have concrete side molds for tanks with a diameter of 20 feet and depth five feet. How many tanks would you need to provide a hydraulic retention time of 1 hour for a daily flow of 1 mgd? What is the overflow rate for this configuration? 6) A 200 cubic meter batch of water has an alkalinity of 150 mg-CaCO 3 /L. Assuming all the alkalinity is attributed to the carbonate ion, how much CaCO 3 (limestone) would be produced if all the C0 3 = is forced to precipitate by calcium (Ca ++ ) addition? Express results in units of kilograms....
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- Spring '10