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HIGH-RATE GRANULAR MEDIA FILTRATION 8.17

60
0.12
50

O.tO
4O
0.08
-0- .E
3o~
0.06
2O
0.04
0.02 • Silica sand #= 2.65 I0
• Garnet sandp=4.13
0 I 1 I I I I I I I
).25 0.5 0.75 I 15 2 2.5
MEAN SIEVE SIZE, mm
FIGURE 8.8 Minimum fluidization velocity Vmf needed to achieve 10% bed expansion at 25 ° C. (Source:
Cleasby and Baumann, 1974.)

a.
1.0 '-'
0.04
o
0.05

I-.-
J
0.5 ~
:~ 0.02
Sand
m
0.01 --

I I
I 0
0 I0 20 3O
TEMPERATURE, °C
FIGURE 8.9 Effect of water temperature on Vm/of sand and coal, and on absolute viscosity of water.
(Source: Cleasby and Baumann, 1974.)