What should be the percentage surface overflow rate?
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The solids loading rate, excluding chemical additives applied to final clarifiers, shall not exceed 25 pounds per square foot per day at peak flow rate with 100 percentrecirculation. ... The floors of circular clarifiers shall be sloped at one-inch per foot (1:12) to form an inverted cone to a central sludge hopper
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Malcolm J. Brandt BSc, FICE, FCIWEM, MIWater, ... Don D. Ratnayaka BSc, DIC, MSc, FIChemE, FCIWEM, in Twort's Water Supply (Seventh Edition), 2017
10.5 Water Softening by Crystallization
Softening reactions can be accelerated by using sand grains for seeding the crystallization of calcium carbonate.
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