UFC 3-280-03
23 JULY 2003
Chemical
Addition-
Feed
Cake
Percent of
Solids
Cycle Time
Pressure
Solids
1
Dry Solids2
(Minutes)3
(kPa)4
Application
(%)
(%)
Municipal Water FeCl3
2 to 8
Polymer
90180
1550
30 to 40
Treated Sludge
60120
1550
35 to 60
Oily Industrial Wastes
4 to 15
Polymer or
FeCl3-5 &
Lime-15
120180
1550
30 to 50
Oily Waste Refinery
4 to 8
FeCl3-10 &
Sludge
Lime-30 or
Lime-30
Pharmaceutical
1 to 4
FeCl3-10 &
150240
1550
25 to 35
Biological Sludge
Lime-30
Surface Water (Low
2 to 3
Polymer or
150180
690 or 1550
30 to 35
Turbidity)
Lime-25
Surface Water (High
4 to 8
Polymer or
90120
690 or 1550
35 to 50
Turbidity)
Lime-15
Surface Water (Lime
6 to 10
None
45120
690
40 to 55
Softened)
Steel Scale
15 to 25
Lime-5
4590
690 or 1550
50 to 70
Textile Waste
2 to 8
FeCl3-10 &
150240
1550
25 to 35
Lime-30
Water Based Ink Sludge
1 to 10
FeCl3-5 &
120210
1550
25 to 55
Lime-15
Water Based Paint
4 to 10
FeCl3-4 &
120180
1550
35 to 60
Sludge
Lime-12
Wet Scrubber
5 to 15
None
4590
690 or 1550
45 to 60
Yttrium Earth
40 to 60
None
1020
690
85 to 95
Zinc Phosphate
1 to 10
None or
60180
690 or 1550
25 to 45
Lime-15
Zinc Sterate
5 to 10
None
2060
690
30 to 40
1
Application data complied from manufacturers referenced in Appendix A.
2
Polymer dosages are not listed because several types may be commercially available and applicable for
the sludge application listed.
3
Cycle time includes mechanical turnaround (i.e., plate shifting, etc.).
4
Pressure conversations: 690 kPa is equivalent to 100 psi, and 1550 kPa is equivalent to 225 psi.
2-21
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