Ozone (O3) can be used to disinfect drinking water. Ozone is highly reactive and can react with chemical species and pathogens in water. It has been found in batch tests that ozone reacts according to a first-order reaction such that its concentration decreases by 50 percent in 10 minutes (i.e., t1/2 = 10 min). A water supplier elects to use ozone as a pretreatment and injects it into the water delivery pipe entering the plant. The pipe is 2.5 feet in diameter with a length of 4,000 feet and handles a steady-state flow of 12,000 gpm. If the pipe can be considered a perfect PFR, identify the following. a. What is the water velocity in the pipe (in ft/s)? b. What initial concentration of ozone is required at the beginning of the pipe to have a 1.0 mg/L concentration at the outlet? c. How much ozone must be added daily (in lb/day) if the O3 transfer process is 80% efficient?
Ozone (O3) can be used to disinfect drinking water. Ozone is highly reactive and can react with chemical species and pathogens in water. It has been found in batch tests that ozone reacts according to a first-order reaction such that its concentration decreases by 50 percent in 10 minutes (i.e., t1/2 = 10 min). A water supplier elects to use ozone as a pretreatment and injects it into the water delivery pipe entering the plant. The pipe is 2.5 feet in diameter with a length of 4,000 feet and handles a steady-state flow of 12,000 gpm. If the pipe can be considered a perfect PFR, identify the following. a. What is the water velocity in the pipe (in ft/s)? b. What initial concentration of ozone is required at the beginning of the pipe to have a 1.0 mg/L concentration at the outlet? c. How much ozone must be added daily (in lb/day) if the O3 transfer process is 80% efficient?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Ozone (O3) can be used to disinfect drinking water. Ozone is highly reactive and can react with
chemical species and pathogens in water. It has been found in batch tests that ozone reacts
according to a first-order reaction such that its concentration decreases by 50 percent in 10
minutes (i.e., t1/2 = 10 min). A water supplier elects to use ozone as a pretreatment and injects it
into the water delivery pipe entering the plant. The pipe is 2.5 feet in diameter with a length of
4,000 feet and handles a steady-state flow of 12,000 gpm. If the pipe can be considered a perfect
PFR, identify the following.
a. What is the water velocity in the pipe (in ft/s)?
b. What initial concentration of ozone is required at the beginning of the pipe to have a 1.0
mg/L concentration at the outlet?
c. How much ozone must be added daily (in lb/day) if the O3 transfer process is 80% efficient?
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