In the Collection System
Thioguard® is highly effective and long lasting when used at
strategic locations throughout the collection systems. Because
Thioguard® is designed to moderate pH rather than destroy sulfide
levels in the water do not directly after Thioguard®'s effectiveness.
Instead, Thioguard® decreases the rate of sulfide production
by shifting the pH range upwards and away from the ideal sulfide
production range of Sulfide Reducing Bacteria (SRB). And, due
to Thioguard®'s optimal retention rate, Thioguard® particles
dissolve only as the pH calls for it. These slowly dissolved
particles will hold the pH in the buffered range for many miles
downstream of the addition point. Thioguard® acts as a buffer,
resulting in achievement of an optimum pH level without overshooting,
since alkalinity is released only as needed.
Thioguard® effectively controls pH in the desired range and prevents
needless overdosing. Thioguard® is flow based added meaning the feed
rate is paced with the flow of the lift station/force main. This allows
for consistent control of pH without over or under dosing. Other chemical
additions are stoichiometric in feed scheme and if not paced with the
flow of the lift station/force main can over and under dose, giving less
control of the desired result.
While wastewater ionization caries from location to location, it typically
takes only 50 to 100 gallons of Thioguard® per million gallons of sewage
to raise and hold the pH in the target range. Most importantly, Thioguard®
can be added at a rate to "dial-in" and H2S reduction level
that fits your needs and budget. Since the feed rate, once calculated,
is constant regardless of dissolved sulfide levels, Thioguard® also offers
a highly predictable periodic cost, making budget management much easier.
At the Treatment Plant
The use of Thioguard® upstream in the collection system offers
important benefits for a number of treatment plant processes
as well.
Scrubber / Bio Filters
Scrubbers used to prevent H2S gas emissions at the headworks,
in trickling filter basins, or the upstream collection system can often
be deactivated or reconfigured for more efficient operation.
Clarifiers
Thioguard® improves wastewater plant operating efficiency at the clarifier
by treating for Biological Oxygen Demand (BOD), turbidity, and phosphorous,
while enhancing Sludge Volume Index (SVI) and settling. The Mg+2 cation
in Thioguard® is an important component in facilitating the bioflocculation
process and improving SVI, sludge density, and sludge dewatering, thus
providing to potential for significant cost savings in transportation
and enhanced nutrient value.
Aeration Basin
Thioguard® beneficially impacts the many oxygen uptake reactions occurring
in the aeration basins. The odor-causing sulfides held in solution by
Thioguard® undergoes rapid oxidation. Thioguard® also shifts the pH into
a range more ideally suited for both BOD and ammonia removal. Because
nitrification in the activated sludge process depletes alkalinity, pH
often drops below acceptable levels. The pH drop may arrest second-stage
nitrification and produce unbalanced conditions in the secondary clarifiers,
Total Suspended Solids (TSS), BOD, and more. Incomplete nitrification,
in turn, allows nitrite (NO2-N) to pass through the clarifiers and directly
into the chlorine contact tank, consuming excessive amounts of costly
chlorine and threatening effective disinfection.
In addition, chronic pH problems interfere with the growth of floc-forming
activated sludge, thus resulting in elevated SVI levels, unwanted denitrification,
or sludge bulking.
Thioguard® is a divalent cation, which improves flocculation, settling
rates, and dissolved air flotation performance. Plus. Thioguard® does
not create additional sludge or hazardous conditions ... or require special
safety equipment.
Digesters
In aerobic or anaerobic digestion, Thioguard® provides the necessary
alkalinity to buffer the acid-producing process used in treating biosolids,
allowing for optimum control and a lower solids output. Since the digesters
are operating efficiently, sludge holding time is reduced and sludge
characteristics are more suitable for land application or other recycling
methods. IN addition, improved dewatering reduces drying, hauling and
disposal costs.
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