h
2
Ø D
h
1
W
T
Fig. 8: Minimum level of fluid handled
Table 6: Minimum level of fluid handled
Ø D
[mm]
h
1
2)
[m]
1000
0.20
3)
1200
1400
1600
1800
2000
2200
2500
h
2
= (n
mixer
/ n
max
)
²
x h
2*
h
2*
for sewage treatment plants/water = 1.00 m (0.75 m for Amaprop 1000)
h
2*
for biogas applications / digestion substrate = 0.50 m
W
t
= Ø D + h
1
+ h
2
Given:
▪
Amaprop V 40-2500/44
▪
Biogas application - digestion substrate
▪
n
Mixer
= 40 rotations/minute
▪
n
max
= 46 rotations/minute
Solution:
h
2
= (40 / 46)
²
x 0.50 m = 0.38 m
W
t
= 2.50 m + 0.30 m + 0.38 m = 3.18 m
Formula for calculating
the minimum fluid level
Calculation example
2)
Minimum
3)
For biogas applications: 0.30 m
6 Commissioning/Start-up/Shutdown
26 of 60
Amaprop®
Goodnal STP ST041 Biological Treatment (KSB Amaprop Installation and Operating Manual) Vendor Manual
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Active 29/10/2013
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