Table 15 (Continued)
Chemical-Specific Feeding Recommendations
Feeding Recommendations
Chemical-to-
Suitable
Common Name/
Best
Water Ratio for
Types
Accessory
Handling
Formula
Feeding
Continuous
of
Equipment
Materials for
Dissolving1
Solutions2
Use
Form
Feeders
Required
Rubber, glass,
Anhy. to form:
Storage tanks for
FERRIC CHLORIDE:
Solution or any
Solution
45%: 5.59 lb/gal
Diaphragm pump
FeCl3 - anhydrous
ceramics,
liquid
dilution up to
40%: 4.75 lb/gal
Rotodip
FeCl3 - 6H2O = crystal
Hypalon,
Dissolving tanks
45% FECl3
35%: 3.96 lb/gal
FeCl3 - solution
Bal. diaphragm
Saran, PVC-1,
for lumps or
content (anhy.
30%: 3.24 lb/gal
(Ferrichlor, chloride
Penton, FRP3,
pump
granules
form has a high
20%: 1.98 lb/gal
or iron)
vinyl, Epoxy,
heat of soln.)
10%: .91 lb/gal
Coagulation pH 4 to 11
(Multiply FeCl3,
Hastelloy C
Dosage: 0.3 to 3 gpg
by 1.666 to
(good to
(sludge cond. 1.5 to
obtain FeCl36H2O
fair), Usco-
4.5% FeCl3)
at 20C)
lite, Tyril
Precipitate PO4
(Rm)
Granules
2 lb/gal
Gravimetric
FERRIC SULFATE:
Dissolver with
316 ss,
L-I-W
(range) 1.4 to
motor-driven
rubber,
Fe2(SO4)33H2O
Volumetric
2.4 lb/gal for
mixer and water
glass,
(Ferrifloc)
Helix
20 min.
control
ceramics,
Fe2(SO4)32H2O
Universal
detention
Vapor remover
hypalon,
(Ferriclear)
Solution
(warm water
solution tank
Saran, PVC-1,
(Iron sulfate)
Diaphragm pump
permits shorter
vinyl, Carp.
Coag. pH 4-6 & 8.8-9.2
Bal. diaphragm
detention)
20 ss,
Dosage: 0.3 to 3 gpg
pump
Penton, FRP3,
Water
Precipitate PO4
Plunger pump
insolubles can
Epoxy, Tyril
Rotodip
be high
Rubber, FRP3,
Dissolvers
FERROUS SULFATE:
Granules
0.5 lb/gal
Gravimetric
L-I-W
FeSO47H2O
Scales
PVC-1, vinyl,
(dissolver
Volumetric
(Copperas, iron
Penton,
detention time
Helix
sulfate, sugar sulfate,
5 min. minimum)
Epoxy,
Universal
green vitroil)
Hypalon,
Solution
Uscolite,
Coag. at pH 8.8 to 9.2
Diaphragm pump
Chrome reduction in
ceramic,
Plunger pump
Carp. 20 ss,
waste treatment
Bal. diaphragm
Tyril
Sewage odor control
pump
Precipitate PO4
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