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
1.0 gal of 12.5% Solution
Solution up to
Rubber,
Solution tanks
SODIUM HYPOCHLORITE:
Diaphragm pump
16%
(avail. Cl2)
glass, Tyril,
Foot valves
NaOCl
Rotodip
Available Cl2
soln. to 12.5
Saran, PVC-1,
Water meters
(Javelle water, bleach
Bal. diaphragm
conc.
gal of water
vinyl,
liquor, chlorine
pump
gives a 1%
Hastelloy C,
bleach)
avail. Cl2 soln.
Hypalon
Disinfection, slime
control
Bleaching
Gas
----
Gas
SULFUR DIOXIDE: SO2
Gas mask
Wet gas:
Rotameter
Dechlorination in
Glass,
SO2 feeder
disinfection
Carp. 20 ss,
Filter bed cleaning
PVC-1, Penton,
About 1 ppm SO2 for
ceramics,
each ppm Cl2
316 (G),
(dechlorination)
Viton, Hypalon
Waste treatment
Cr +6 reduction
SULFURIC ACID: H2SO4
Soln. at desired
Dilute to any
Goggles
Conc.>85%:
Liquid
Plunger pump
(Oil of Vitriol,
dilution
desired conc.:
Rubber gloves
Steel, iron,
Diaphragm pump
Vitriol)
H2SO4 has a high
NEVER add water
Aprons
Penton, PVC-1
Bal. diaphragm
pH adjustment
heat of soln.
to acid but
Dilution tanks
(good), Viton
pump
Activation of silica
rather always
40 to 85%:
Rotodip
Carp. 20,
add acid to
alkaline wastes
PVC-1, Penton,
water.
Viton
2 to 40%:
Carp. 20,
FRP3, glass,
PVC-1, Viton
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