As the project engineer for your consulting firm, you are in charge of designing a flocculation tank to treat municipal drinking water. The design flow for the plant is 0.050 m3/s. The average water temperature is 10oC. The following design assumptions for the flocculation basin have been made: Number of tanks = 1 Number of compartments in tank: 3 Tapered G in 3 compartments: 60, 50, and 20 s-1 Detention time = 30 min for entire flocculation basin Depth = 3 m Tanks will have a square compartment plan (overhead) view 1 Horizontal shaft paddle wheel per axis will be used Paddle wheels will have 4 arms and 2 blades/arm
As the project engineer for your consulting firm, you are in charge of designing a flocculation tank to treat municipal drinking water. The design flow for the plant is 0.050 m3/s. The average water temperature is 10oC. The following design assumptions for the flocculation basin have been made:
Number of tanks = 1
Number of compartments in tank: 3
Tapered G in 3 compartments: 60, 50, and 20 s-1
Detention time = 30 min for entire flocculation basin
Depth = 3 m
Tanks will have a square compartment plan (overhead) view
1 Horizontal shaft paddle wheel per axis will be used
Paddle wheels will have 4 arms and 2 blades/arm
Paddle blades are 3 m long by 0.6 m wide. Assume blade spacing (diameter) of 1 and 2 m.
Design the flocculation tank by providing the following for the first two compartments only:
a) Tank and compartment dimensions in m
b) Water power input in kW
c) Rotational speed of the paddle wheel shaft in rpm
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