Page 270 - Water and wastewater engineering

COAGULATION AND FLOCCULATION 6-47

j. Each paddle wheel is then

.
6 36 m
.
3 18 m long
2
k. Place three paddle boards on each of four paddle arms with leading edge at 1/3 points, that is,

1 5 . m
0 5 m
.
3
The dimensions of each paddle board will be 15 cm 3.18 m. A sketch of the layout of
the paddle flocculator is shown below.

Flocculator

Profile Baffle Wall

Plan
Paddle

Shaft
r
r 1
r 2
3
w
L

l. Solve Equation 6-12 for P to determine the water power required to achieve a G 40
1
s for the first chamber (compartment). Using Appendix A and a water temperature of
15 C find 1139. 10 3 Pa
.s
2
3
1
.
.
V
P G 2
40 s ) ( 1 139 10 3 Pa
s)( 127 33 m ) 23204 or 230 W
.
(