Page 357 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

312 Fundamentals of Water Treatment Unit Processes: Physical, Chemical, and Biological

w(b) 5

w(b) 4
r(b) 5

w(b) 3 r(b) 4

SG ? u 92,000 92,000 92,000 23,000 < SGT < 210,000 w(b) 2 r(b) 3

w(b) 1 r(b) 1 r(b) 2

G ? u 48,000 32,000 12,000 48,000 32,000 12,000 48,000 32,000 12,000
Criteria

v b (m=s) 0.69 0.58 0.28 0.57 0.44 0.23 0.50 0.38 0.20 0.1 < v b < 0.9 calculation

v 2 (rad=s) 0.31 0.26 0.12 0.25 0.19 0.10 0.22 0.17 0.09 rpm k)SA i Rbi ^ 3] ^ 0.333 v 2 ¼ second
0.007

k 0.08 0.08 0.07 0.08 0.08 0.07 0.08 0.07 0.07 þ 0.06

60=2p
(rpm) v v 1 ¼ [(P=V)*V=((1=2)*Cd*r w *(1
n 3.53 2.96 1.40 2.91 2.22 1.16 2.52 1.93 1.00
Spreadsheet v 1 (rad=s) 0.37 0.31 0.15 0.30 0.23 0.12 0.26 0.20 0.10 P (N ? m=s) 1353 601 85 757 336 47 494 220 31

Using V

Basin Operation P (N ? m=s) 1353 601 85 757 336 47 494 220 31 P ¼ (P=V) (rpm) 3.53 2.96 1.40 2.91 2.22 1.16 2.52 1.93 1.00

Flocculation Summary 4

(continued) of P=V (N ? m=s=m 3 ) 6.43 2.86 0.40 3.60 1.60 0.23 2.35 1.04 0.15 P=V ¼ mG 2 G (s 1 ) 60 40 15 60 40 15 60 40 15

11.6 Design

TABLE Generic G (s 1 ) 60 40 15 60 40 15 60 40 15 Assumed Temperature (8C) 0 0 0 20 20 20 40 40 40