Table 15 (Continued)
Chemical-Specific Feeding Recommendations
1
To convert gm/100 mL to lb/gal, multiply figure (for gm/100 mL) by 0.083. Recommended strengths of solutions for
feeding purposes are given in pounds of chemical per gallon of water (lb/gal) and are based on plant practice
for the commercial product.
The following table shows the number of pounds of chemical to add to 1 gallon of water to obtain various percent
solutions:
% Soln.
lb/gal
% Soln.
lb/gal
% Soln.
lb/gal
0.1
0.008
2.0
0.170
10.0
0.927
0.2
0.017
3.0
0.258
15.0
1.473
0.5
0.042
5.0
0.440
20.0
2.200
1.0
0.084
6.0
0.533
25.0
2.760
30.0
3.560
2
Iron and steel can be used with chemicals in the dry state unless the chemical is deliquescent or very
hygroscopic,
or in a dampish form and is corrosive to some degree.
3
FRP, in every case, refers to the chemically resistant grade (bisphenol A+) of fiberglass reinforced plastic.
4
"Floodable" as used in this table with dry powder means that, under some conditions, the material entrains air
and
becomes "fluidized" so that it will flow through small openings, like water.
5
When feeding rates exceed 100 lb/hr, economic factors may dictate use of calcium oxide (quicklime).
6
For small doses of chlorine, use calcium hypochlorite or sodium hypochlorite.
7
Information about many other coagulant aids (or flocculant aids) is available from Nalco, Calgon, Drew, Betz,
North American Mogul, American Cyanamid, Dow, etc.
anhy.
anhydrous
in.
inch
approx.
approximate
ind.
industrial
aq.
aqueous
L-I-W
loss in weight
avail.
available
max.
maximum
avg.
average
M.P.
melting point
bbl.
barrel
min.
minute
B.P.
M.W.
molecular weight
C/l
carload
ppm
coag.
coagulation
/
per
conc.
concentration
%
percent
cc
cubic centimeter
lb
pound
cu ft
cubic foot
lb/gal
pounds per gallon
CVPC
chlorinated polyvinylchloride
Proportioner
proportioning pump
Be
degrees Baume
pulv.
pulverized
C
degrees Celsius
PVC
polyvinyl chloride
F
degrees Fahrenheit
sat.
saturated
diln.
dilution
soln.
solution
esp.
especially
sp.g.
specific gravity
F.P.
freezing point
std.
standard
FRP
fiberglass reinforced plastic
T/C
tank car
gal
gallon
T/T
tank truck
gm
gram
wt.
weight
Source: BIF Technical Bulletin Chemicals Used in Treatment of Water and Wastewater. Table modified and reproduced
with permission.
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