MIL-HDBK-1164
Table 9 (Continued)
Quantities and
Disposal Possibilities
Type of Waste
Characteristics
Treatment Required
Centrifuges and
vacuum filters dewater
sludges up to about
15% solids.
Pre-coat vacuum filters
dewater sludge up to
25% solids.
Pressure filtration
dewaters sludge to 25-
40% solids, often
requiring lime as
conditioner.
Filter wash water
Normal wash generates
Flow equalization and
Same as for coagulation
2
(2)
about 150 gal/ft filter
concentration through
sludges. Combine with
area.
sedimentation and
coagulation sludge where
Chemically-precipitated
decanting.
applicable.
raw water impurities and
Where no coagulation
coagulation chemicals.
used, dispose as
For alum plants, total
softening sludge.
solids varies with time up
Gradually return entire
to 1,000 mg/L, average
flow to plant influent. (3)
400 mg/L.
Plants removing iron and
manganese may be 4
times higher in total solids.
Lime softening
Assume 3 lb dry sludge
Dewatering lime
Discharge to wastewater
sludges
solids per lb quicklime
softening sludges is not
treatment plants. (1)
added.
particularly difficult. The
following methods can
be used following
thickening:
68
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