A local plant has a pancake type disinfection tank. Diameter is 15 m and height is 6 m. Flow of filtered water is 43 m3/min. To meet EPA regulation, plant should achieve 3 log inactivation of Giardia Cyst at pH 8 and 20 degree Celsius. Currently plant uses chlorine as primary disinfectant. (*Answers in whole number, No unit) Contact time? min CT value? mg-min/L Disinfectant concentration? mg/L

A local plant has a pancake type disinfection tank. Diameter is 15 m and height is 6 m. Flow of filtered water is 43 m3/min. To meet EPA regulation, plant should achieve 3 log inactivation of Giardia Cyst at pH 8 and 20 degree Celsius. Currently plant uses chlorine as primary disinfectant. (*Answers in whole number, No unit) Contact time? min CT value? mg-min/L Disinfectant concentration? mg/L

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter7: Thermal Processes

Section: Chapter Questions

Problem 7.12P

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Q-ASP is used to treat a waste water flow of 2MLD having BOD5 of 250 mg/lit. The biomass concentration in the aeration tank is 2500 mg/lit and the concentration of biomass leaving the system is 80 mg/lit, the aeration tank has a volume of 200m³. Find the sludge age.
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