Design the structural components of a dual-media

Design the structural components of a dual-media rapid filter for the city of Apple Valley. The maximum day flow rate is 45,000 m 3 / d. The design criteria and media analyses are given below. Assume a 525 mm diameter pipe from the gullet is to carry the wash water at a velocity of 1.5 m/s. Verify that the sand meets the GLUMRB recommendations for E and U.  Adjust the grain size distribution if the sand does not meet the specification. Also verify that largest grain size anthracite coal will have the same approximate settling velocity as the finest sand grain size.

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