Design a grit chamber for a wastewater treatment plant with an average fow rate of 25,000 m3/d and a peak fow rate of 55,000 m3/d. The detention time at peak fow is 3.0 min. The width to depth ratio is 2:1. Use a depth of 2 m. The aeration rate is 0.4 m3/min per m of tank length. Determine the total air required and dimensions of the grit chamber.
Design a grit chamber for a wastewater treatment plant with an average fow rate of 25,000 m3/d and a peak fow rate of 55,000 m3/d. The detention time at peak fow is 3.0 min. The width to depth ratio is 2:1. Use a depth of 2 m. The aeration rate is 0.4 m3/min per m of tank length. Determine the total air required and dimensions of the grit chamber.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Design a grit chamber for a wastewater treatment plant with an
average fow rate of 25,000 m3/d and a peak fow rate of 55,000
m3/d. The detention time at peak fow is 3.0 min. The width to depth
ratio is 2:1. Use a depth of 2 m. The aeration rate is 0.4 m3/min per
m of tank length. Determine the total air required and dimensions
of the grit chamber.
Expert Solution
Step 1
Given:
Avg. Flow Rate=25000m3/day
Peak Flow Rate =50000m3/day
Detention time at peak flow=3min
Width/Depth Ratio =2:1
Use Depth of 2m, therefore width =4m
Aeration Rate=0.4m3/min x m of tank length
To Find: Total Air required and dimension of grit chamber
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