BY MIKE MOWBRAY AND GARY ENGSTROM, U.S. WATER SERVICES
usage and compromising their quality.
Companies, and now even municipalities, are being subject to thorough review and comment periods to justify a
facility’s proposed discharge rates and
In the realm of water treatment,
one area that has historically come up
during the environmental review cycle
is the evaluation of the additives used
to treat cooling tower systems. The plot
of the movie “Erin Brockovich” was
centered on the use of a cooling tower
chemical additive (chromate). It wasn’t
until later that it was discovered that
chromates were carcinogenic and as a
result of this discovery the use of chromates was banned.
Fast forward to today and there is a
new focus on cooling tower additives.
This time phosphorus (P) discharges
have gained significant attention as a
result of the impact they can have on
the eutrophication of lakes and other
of opening valves and discharging
unregulated waste streams into the en-
vironment. Industry has seen the im-
pact of heightened scrutiny from the
public and regulatory bodies.
There are strong trends in protecting
our natural resources from excessive
Scientists test a new phosphorus-free corrosion inhibitor in
U.S. Water Services’ Research & Development Lab. Photo
courtesy: U.S. Water Services