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Sanitary Sewer Odor and
Corrosion Control
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When added directly to
the wastewater stream, Thioguard controls odors with
typically fewer points of addition when compared with other
chemicals.
 How
Thioguard Controls Odors:
Odors occur when waste
water pH allows hydrogen sulfide to evolve from liquid phase
hydrosulfide (HS-). Thioguard® prevents formation of H2S
gas by favoring formation of non-odorous HS-.
HS-
+ H+ Þ H2S |
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H2S
formation is very sensitive to pH......
 Thioguard®
buffers water, gently raising pH without
overshooting. Alkalinity is gradually released as
needed. This automatically controls pH in the correct
range to prevent formation and release of H2S.
Overdosing simply adds alkalinity. |
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In deionized water it
takes about 15 mg/l of Mg(OH)2 to achieve pH in
the optimum range to control odors. Since wastewater
ionization varies with location, a titration is necessary to
determine the optimum rate of addition.
It generally takes only 50 to 100 gallons of Thioguard® per
million gallons of sewage to raise and hold pH in the range
of 8 to 8.5. Once determined, the feed rate is constant
for all sulfide levels. |
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Overshooting or
raising pH higher than 9.0 results in:
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Precipitation of
unwanted sludge in the collection system
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 Interference
with treatment plant operations
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Evolution of ammonia
from the flow
Adding
Thioguard® automatically maintains pH
in this critical range without overshooting. |
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Thioguard® is shipped
in bulk tanker. Feed equipment is
optionally available from Martin Marietta. Call us
today at (800) 648-7400. Following an evaluation of
your system we’ll recommend where to add. Thioguard®
requires few addition points compared with other
chemicals.
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Sanitary
Sewer Odor and Corrosion Control
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THIOGUARD
is licensed to Martin Marietta Magnesia Specialties LLC by Premier
Chemicals LLC under U.S. Patents 5,833,864; 5,718,944; 5,834,075;
and 6,056,997
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