A constant velocity grit chamber is used in a small coastal community as a form of pre- treatment to incoming wastewater flows. The town regularly experiences a number of visitors during school holiday periods. If the usual wastewater flow is 10 ML per day, and the usual holiday period flow is 18 ML per day, design an appropriately sized grit chamber arrangement if the target grit has a diameter of 0.16 mm with a specific gravity of 2.75. Show your solutions for the following (but not necessarily in this order): 1. Determine the settling velocity for the target particle 2. Assuming a horizontal flow velocity of 0.32 m/s determine an appropriate overflow rate for the grit chamber 3. Determine an appropriate chamber length and cross sectional area and draw figures 4. Comment on how you could accommodate for the seasonal fluctuations in flows.
A constant velocity grit chamber is used in a small coastal community as a form of pre- treatment to incoming wastewater flows. The town regularly experiences a number of visitors during school holiday periods. If the usual wastewater flow is 10 ML per day, and the usual holiday period flow is 18 ML per day, design an appropriately sized grit chamber arrangement if the target grit has a diameter of 0.16 mm with a specific gravity of 2.75. Show your solutions for the following (but not necessarily in this order): 1. Determine the settling velocity for the target particle 2. Assuming a horizontal flow velocity of 0.32 m/s determine an appropriate overflow rate for the grit chamber 3. Determine an appropriate chamber length and cross sectional area and draw figures 4. Comment on how you could accommodate for the seasonal fluctuations in flows.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A constant velocity grit chamber is used in a small coastal community as a form of pre-
treatment to incoming wastewater flows. The town regularly experiences a number of visitors
during school holiday periods. If the usual wastewater flow is 10 ML per day, and the usual
holiday period flow is 18 ML per day, design an appropriately sized grit chamber arrangement if
the target grit has a diameter of 0.16 mm with a specific gravity of 2.75.
Show your solutions for the following (but not necessarily in this order):
1. Determine the settling velocity for the target particle
2. Assuming a horizontal flow velocity of 0.32 m/s determine an appropriate overflow rate for
the grit chamber
3. Determine an appropriate chamber length and cross sectional area and draw figures
4. Comment on how you could accommodate for the seasonal fluctuations in flows.
Expert Solution
Step 1
Data given
Usual waste water flow = 10 ML/day
Holiday period flow = 18 ML/day
d = 0.16 mm
G = 2.75
vh = 0.32 m/s
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