Water Treatment Plant Operation Volume 2 - CH. 4: Fluoridation
What is the maximum 4.0 mg/L
contaminant level for fluoride?
What is one advantage of a More accurate
gravimetric feeder over a
volumetric type?
, Calculate the fraction of fluoride 0.606
in sodium silicofluoride
(Na2SiF6). Use the following
molecular weights: sodium =
22.99 grams per mole; silicon =
28.09 grams per mole; fluoride =
19 grams per mole.
What device produces a fluoride Saturator
solution for the fluoridation
process?
What should be done to a water Check the water's natural fluoride level
before fluoridation?
How can dust be minimized while Use crystalline sodium fluoride.
loading a saturator?
Why might conduits and fittings in Give plant a fresher look and minimize painting
a fluoridation system be
plastic?
A flow rate of 200 gallons per 0.12 gal/d
minute is to be related with a
20 percent solution of
hydrofluosilicic acid (H2SiF6) with
a specific gravity of 1.21. The
water to be treated contains 0.3
milligrams per liter (mg/L) of
fluoride and the desired
concentration of fluoride is 0.7
mg/L. Calculate the volumetric
feed rate for hydrofluosilicic
acid in gallons per day. Use
molecular weights of 1 gram
per mole for hydrogen,
28.09 grams per mole for silicon,
and 19 grams per mole of
fluoride.
Why should a new chemical Equipment can quickly be damaged without lubrication
feed system be lubricated
before first startup?
What should be avoided when Sharp curves or loops
placing the discharge line from a
metering pump in a small
What is the maximum 4.0 mg/L
contaminant level for fluoride?
What is one advantage of a More accurate
gravimetric feeder over a
volumetric type?
, Calculate the fraction of fluoride 0.606
in sodium silicofluoride
(Na2SiF6). Use the following
molecular weights: sodium =
22.99 grams per mole; silicon =
28.09 grams per mole; fluoride =
19 grams per mole.
What device produces a fluoride Saturator
solution for the fluoridation
process?
What should be done to a water Check the water's natural fluoride level
before fluoridation?
How can dust be minimized while Use crystalline sodium fluoride.
loading a saturator?
Why might conduits and fittings in Give plant a fresher look and minimize painting
a fluoridation system be
plastic?
A flow rate of 200 gallons per 0.12 gal/d
minute is to be related with a
20 percent solution of
hydrofluosilicic acid (H2SiF6) with
a specific gravity of 1.21. The
water to be treated contains 0.3
milligrams per liter (mg/L) of
fluoride and the desired
concentration of fluoride is 0.7
mg/L. Calculate the volumetric
feed rate for hydrofluosilicic
acid in gallons per day. Use
molecular weights of 1 gram
per mole for hydrogen,
28.09 grams per mole for silicon,
and 19 grams per mole of
fluoride.
Why should a new chemical Equipment can quickly be damaged without lubrication
feed system be lubricated
before first startup?
What should be avoided when Sharp curves or loops
placing the discharge line from a
metering pump in a small
