Page 425 - Water and wastewater engineering

10-42 WATER AND WASTEWATER ENGINEERING

a water temperature of 12 C. Provide the following in your summary of the de-
sign:
Q design
Number of tanks
Width of each tank
Length of each tank
Side water depth
Depth of sludge zone
L:D
v f
Reynolds number
Number of launders
Launder length
Weir loading
Type of sludge collector

10-17. Design a horizontal flow rectangular sedimentation basin for a maximum day design
2
3
3
flow rate of 15,000 m /d. Assume an overflow rate of 50 m /d · m and a water tem-
perature of 15 C. Provide the following in your summary of the design:
Q design
Number of tanks
Width of each tank
Length of each tank
Side water depth
Depth of sludge zone
L:D
v
f
Reynolds number
Number of launders
Launder length
Weir loading
Type of sludge collector

10-18. Design a horizontal flow rectangular sedimentation basin using high-rate settlers for
3
a maximum day design flow rate of 25,000 m /d. Assume a water temperature of
12 C, that the angle of the settler tubes is 60 , and that they have a hydraulic diameter
of 0.05 m. Also assume the floc has excellent settling characteristics. Provide the fol-
lowing in your summary of the design:
Q design
Number of tanks