3.0
10
20 30 40 50 60
Time (min)
POTENTIALLY USEFUL INFORMATION
GLUMRB Recommendations
Rapid mixing: Detention time≤ 30 sec
Slow mixing (flocculation): Detention time > 30 min
Velocity through tank= 0.5-1.5 ft/min
Paddle velocity= 0.5-3 ft/sec
Sedimentation: Detention time ≥ 4 hrs
Velocity through tank ≤ 0.5 ft/min
Weir loading≤ 20,000 gpd/ft
Over-flow rate= 500-800 gpd/ft
2C =
−C
1
C e
(
Q
V
k
/
)
o = +
k(
V/
Q)
o4
05.
a kt
R2Pe)(/ae
4
= Pe
1
and Pe = uL/D
+
−
−aPe−
= +
o a e a e
D
D
−2 2
σ
θ = σ 2 2 2 ( ) 2 ( 1 e
uL/
D)
σ
θ =
t −
C
t tC
2= C
=
σ ∑ ∑uL
2 t
2
t
∑ ∑
A = Q ×
v = Q
A = Q
t uC =
c v
uoH C H
o A
H
A
xsNumber of samples taken for coliform testing based on population served by treatment facility
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