Consider a flocculation basin consisting of 3 tanks in series. Each tank is of the same dimension (4.2 deep x 4.2 m long x 3.8 m wide) and is mixed by a paddle wheel. The paddle wheel for the first tank has a 185 W power input, the second wheel 30 W input, and the third wheel 7.6 W power. Given a water temperature of 15 C and a flow rate of 4.2 MGD, calculate a. The mixing intensity of each of the tanks b. Calculate the ratio of No/N for tank 1 given a particle diameter of 20 μm and a number concentration 200,000 particles/mL (this ratio the number of particles that have aggregated to form a bigger particle).
Consider a flocculation basin consisting of 3 tanks in series. Each tank is of the same dimension (4.2 deep x 4.2 m long x 3.8 m wide) and is mixed by a paddle wheel. The paddle wheel for the first tank has a 185 W power input, the second wheel 30 W input, and the third wheel 7.6 W power. Given a water temperature of 15 C and a flow rate of 4.2 MGD, calculate a. The mixing intensity of each of the tanks b. Calculate the ratio of No/N for tank 1 given a particle diameter of 20 μm and a number concentration 200,000 particles/mL (this ratio the number of particles that have aggregated to form a bigger particle).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Consider a flocculation basin consisting of 3 tanks in series. Each tank is of the same dimension (4.2 deep x 4.2 m long x 3.8 m wide) and is mixed by a paddle wheel. The paddle wheel for the first tank has a 185 W power input, the second wheel 30 W input, and the third wheel 7.6 W power. Given a water temperature of 15 C and a flow rate of 4.2 MGD, calculate
a. The mixing intensity of each of the tanks
b. Calculate the ratio of No/N for tank 1 given a particle diameter of 20 μm and a number concentration 200,000 particles/mL (this ratio the number of particles that have aggregated to form a bigger particle).
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