7 A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the2000 m 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 Tai = (-0.45 /h) Ci.When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:0.03Tbace =ImgChactL.a) Calculate the required flow rate in L/s of the stock solution when the system is operating atsteady state, including a schemätic of the systemb) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent fromthe tank?

Given data-Volume =2000 m3Velocity V=0.4 m3/sPollutant =7.94 CFU /LStock =750…

Answered: D00 m3 tank at a rate of 0.4 m/s.…

D00 m3 tank at a rate of 0.4 m/s. nlorine. The treatment unit uses a ill cause the chlorine concentratio uch a way that it is depleted at ar

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the
2000 m 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 Tai = (-0.45 /h) Ci.
When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:
0.03
Tbace =
Img
Chact
L.
a) Calculate the required flow rate in L/s of the stock solution when the system is operating at
steady state, including a schemätic 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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