A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the 2000 m3 tank at a rate of 0.4 m3/s. The pollutant contains 7.94 CFU per liter and has no 0 mg/l of chlorine. The treatment unit uses a stock solution containing 750 mg/L which is released a rate that will cause the chlorine concentration in the tank to be 2 mg/L. The chlorine reacts with the water in such a way that it is depleted at a rate (in mg/L-h) given by rcl = ( -0.45 / h) CCl. When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:a) Calculate the required flow rate in L/s of the stock solution when the system is operating at steady state, including a schematic of the system.b) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent from the tank? A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the2000 mở tank at a rate of 0.4 m/s. The pollutant contains 7.94 CFU per liter and has no 0 mg/l ofchlorine. The treatment unit uses a stock solution containing 750 mg/L which is released a rate thatwill cause the chlorine concentration in the tank to be 2 mg/L. The chlorine reacts with the water insuch a way that it is depleted at a rate (in mg/L-h) given by ra = ( -0.45 / h) Caı.When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:(0.03"CclCbactTbact1mg+ Ccla) Calculate the required flow rate in L/s of the stock solution when the system is operating atsteady state, including a schematic of the system.b) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent fromthe tank?

Given, The volume of the tank=2000 m3 Discharge= 0.4m3/sec Influent= 7.94 CFU/L Stock solution= 750…

Answered: A rapidly mixed tank consists of a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the
2000 m3 tank at a rate of 0.4 m3/s. The pollutant contains 7.94 CFU per liter and has no 0 mg/l of
chlorine. The treatment unit uses a stock solution containing 750 mg/L which is released a rate that
will cause the chlorine concentration in the tank to be 2 mg/L. The chlorine reacts with the water in
such a way that it is depleted at a rate (in mg/L-h) given by rcl = ( -0.45 / h) CCl.
When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:

a) Calculate the required flow rate in L/s of the stock solution when the system is operating at
steady state, including a schematic of the system.
b) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent from
the tank?

A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the
2000 mở tank at a rate of 0.4 m/s. The pollutant contains 7.94 CFU per liter and has no 0 mg/l of
chlorine. The treatment unit uses a stock solution containing 750 mg/L which is released a rate that
will cause the chlorine concentration in the tank to be 2 mg/L. The chlorine reacts with the water in
such a way that it is depleted at a rate (in mg/L-h) given by ra = ( -0.45 / h) Caı.
When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:
(0.03
"Ccl
Cbact
Tbact
1mg
+ Ccl
a) Calculate the required flow rate in L/s of the stock solution when the system is operating at
steady state, including a schematic of the system.
b) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent from
the tank?

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