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
1
Solutions2
Use
Form
Dissolving
Feeders
Required
POLYMERS, DRY7
Gravimetric
Steel, rubber,
Max. conc. 1%
Powdered,
Special
L-I-W
High M.W. synthetic
Hypalon, Tyril
Feed even
flattish
dispersing
Volumetric
polymers
Noncorrosive,
stream to
granules
procedure
vigorous vortex Helix
but no zinc
Mixer: may hang
Solution
Same as for
(mixing too
up; vibrate if
(Colloidal)
H2O of similar
fast will
needed
Diaphragm pump
pH or
retard
Plunger pump
according to
colloidal
Bal. diaphragm
its pH
growth)
pump
1 to 2 hours
detention
Same as dry
Makedown to:
Mixing and
POLYMERS, LIQUID AND
Varies with
Diaphragm pump
products
aqueous tanks may
charge type
Plunger pump
Liquid:
High M.W. synthetic
be required
Bal. diaphragm
0.5% to 5%
polymers
pump
Separan NP10 potable
0.05% to 0.2%
grade, Magnifloc 990;
Purifloc N17 Ave.
Dosage: 0.1 to 1 ppm
POTASSIUM PERMANGANATE:
Crystals plus
Dissolving tank
Steel, iron
1.0% conc.
Gravimetric
L-I-W
KMnO4
Mixer
anticaking
(2.0% max.)
(neutral &
Volumetric
Cairox
additive
Mechanical
alkaline)
Helix
Taste odor control
316 st.
Solution
PVC-1, FRP3,
0.5 to 4.0 ppm
Diaphragm pump
Removes Fe and Mn at a
Hypalon,
Plunger pump
1-to-1 ratio
Penton,
Bal. diaphragm
Lucite, rubber
pump
(alkaline)
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