Assign_2-4_Chlorine

Assign_2-4_Chlorine - dosage is 1 mg-Cl 2 /L for a water...

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EVEG 3110 Disinfection Homework Assignment Source material: Lecture L3-Equilibrium Lecture L15-Disinfection Book pages 740-755 1) A water has a pH of 7.8 and a total free chlorine residual of 2 mg-Cl 2 /L. What is the hypochlorous acid concentration ( in units of mg-Cl 2 /L)?
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2) Using the Ct table provided in the notes, what is the capacity (in gallons) of a disinfection tank would be required to obtain a 99% kill of Giardia on a flow of 3 mgd with an assumed minimum temperature of 10 o C? Assume free residual
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Unformatted text preview: dosage is 1 mg-Cl 2 /L for a water with a pH of 8.0. 3) Assuming the chlorine demand for a wastewater effluent is 2.5 mg-Cl 2 /L, and a free residual of 0.5 mg-Cl 2 /L is required for disinfection purposes, how much calcium hypochlorite would have to dosed daily for a mean flow of 6 mgd. Assume a chemical purity of 93 % for your Ca(OCL) 2 . 4) How much sulfur dioxide (in kgs) must be added to neutralize a 0.8 mg/L free chlorine residual for a daily flow of 15 mgd? See book....
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This note was uploaded on 05/20/2010 for the course EVEG 3110 taught by Professor Malone during the Spring '10 term at LSU.

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Assign_2-4_Chlorine - dosage is 1 mg-Cl 2 /L for a water...

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