Design a grit chamber for a conventional wastewater treatment plant to treat wastewater from a community equalling to 20000m^3 per day. Assume the following The grit chamber is preceded by course screens and has a rectangular cross section Diameter of the smallest grit particle to be removed is 0.2mm Average temperature is 20°C, specific gravity of grit particle is 2.65

Design a grit chamber for a conventional wastewater treatment plant to treat wastewater from a community equalling to 20000m^3 per day. Assume the following The grit chamber is preceded by course screens and has a rectangular cross section Diameter of the smallest grit particle to be removed is 0.2mm Average temperature is 20°C, specific gravity of grit particle is 2.65

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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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.
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