Answered: The wastewater contains 7.5 x 105 fecal…

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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Question

The wastewater contains 7.5 x 10⁵ fecal CFU per liter. The permissible fecal coliform concentration is 3500 fecal coliform CFU/L. Calculate the length of pipe required if the linear velocity of the wastewater pipe is 0.73 m/s. Take the reaction rate constant for the destruction of the fecal coliform is 0.21 per min.

Expert Solution

Step 1

Given:

Initial coliform concentration, C_o = 7.5 x 10⁵ CFU/L

Maximum permissible coliform concentration, C = 3500 CFU/L

Linear velocity of pipe, v = 0.73 m/s

Reaction rate constant, k = 0.21 min^-1

Step 2

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