| Thioguard® Controlling
Odor with Direct Addition
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+
H2S |
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| H2S formation is very sensitive to pH......
- At pH < 7.0 the reaction favors hydrogen sulfide
- At pH >7.0 the reaction favors hydrosulfide
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.
Overshooting or raising pH higher than
9.0 results in:
- Precipitation of unwanted sludge in the collection system
- Interference with treatment plant operations
- 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 or drums. Feed equipment is optionally available
from Premier. Call us today at 800-227-4287. 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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