QUESTION
Objective Question
Why is a proportional flow weir provided in a grit chamber?
Answer
( Option C)
To take care of maintaining constant flow velocity in the grit chamber over a certain depth range
Solution
Grit chamber hydraulics require a highly specific, unchanging flow velocity (typically around 0.3 m/s) to function effectively. This speed is a critical threshold: it is slow enough to let heavy inorganic materials like sand and silt settle to the bottom, but fast enough to keep lighter organic matter moving forward without settling and fouling the chamber.
