Design a longitudinal serpentine chlorine contact chamber for a design flow of 20,000 m³/d. Free chlorine is the disinfectant at a concentration of 0.25 mg/L. The temperature and pH of the water are 10C and 8.0 respectively. The chamber must have 3-log removal of viruses. L/W = 60 and H=3W. a. What is the Ct value (in min * mg/L)? b. What is the volume of the contact chamber in m³? C. What is the tank length in m?
Design a longitudinal serpentine chlorine contact chamber for a design flow of 20,000 m³/d. Free chlorine is the disinfectant at a concentration of 0.25 mg/L. The temperature and pH of the water are 10C and 8.0 respectively. The chamber must have 3-log removal of viruses. L/W = 60 and H=3W. a. What is the Ct value (in min * mg/L)? b. What is the volume of the contact chamber in m³? C. What is the tank length in m?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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You will have to look up the Ct values for this problem. It will not let me upload more than 2 images so I am unable to upload the Ct charts but they can be found online.
Transcribed Image Text:### Designing a Longitudinal Serpentine Chlorine Contact Chamber
This task involves designing a chlorine contact chamber with specific requirements for a water treatment process. The parameters provided are essential to achieve effective disinfection.
#### Design Parameters:
- **Design Flow**: 20,000 m³/d
- **Disinfectant Type**: Free chlorine with a concentration of 0.25 mg/L
- **Water Conditions**: Temperature at 10°C and pH value of 8.0
- **Virus Removal Requirement**: 3-log reduction
- **Chamber Dimensions Ratio**:
- Length to Width (L/W) = 60
- Height to Width (H/W) = 3
#### Design Questions:
a. **Ct Value Calculation**:
- Determine the Ct value in min * mg/L necessary for effective disinfection.
b. **Chamber Volume**:
- Calculate the total volume of the contact chamber in cubic meters (m³).
c. **Tank Length**:
- Compute the length of the tank in meters (m).
These calculations require knowledge of the relationship between disinfection parameters, hydraulic design factors, and the efficacy of chlorine as a disinfectant under varying environmental conditions.
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