Civil Engineering Reference
In-Depth Information
200
150
100
50
Vacuum =
15 in. Hg
0
0
20
40
60
80
100
120
Sludge Mean Floc Size, in Microns
Fig. 23-8.
Floc size and resistance of metal hydroxide sludges to dewatering by vacuum filtration
(
Source:
Reference 31; reprinted from
Journal of Environmental Engineering,
''Vacuum Filtration
of Metal Hydroxide Sludges,'' 1980. Copyright
American Society of Civil Engineers.)
120
Alum Sludge
Betz 1120
100
80
60
40
20
0
1000
10,000
100,000
1,000,000
G
t
Fig. 23-9.
Effect of
Gt
on optimum polymer dose for alum sludge conditioning (
Source:
Ref-
erence 32; reprinted from
Journal of Environmental Engineering,
''Mixing Intensity and Polymer
Sludge Conditioning,'' 1984. Copyright
American Society of Civil Engineers.)
