| The BiO3 Service approach to odor control
is to work on either the cause or on the effect or both .
Cause: The underlying cause of wastewater facility odors
is the dissolved sulfides in the wastewater. Dissolved sulfides
are created by anaerobic sulfate-reducing bacteria (SRB’s)
during their growth cycle – they take an oxygen atom
from sulfate in the wastewater thereby reducing the sulfate
to sulfide.
The BiO3 odor control approach to work on the
cause is to use BiO3 Bioaugmentation to reduce
the dissolved sulfide levels in the wastewater thereby reducing
the odor precursors. For more information, click on (BiO3
Bioaugmentation).
Effect: When the wastewater reaches an airspace (force main
air pocket, gravity main, wetwell or grit pit) and conditions
are right (pH and temperature) then the dissolved sulfides
in the wastewater form Hydrogen Sulfide (H2S) and/or Mercaptans
(odorous sulfur-containing compounds) which offgas into the
headspace.
The BiO3 odor control approach to work on the effect is to
use a BiO3 Air Treatment System to eliminate the odorous gases
before the wetwell air is released to the atmosphere. For
more information, click on (BiO3
Airborne Odor Control).
The magnitude and scope of the odor problems dictate whether
one or both of the BiO3 odor control technologies are used.
If the odor problems are isolated to one or two lift stations,
then the solution might be limited solely to the BiO3 Airborne
Odor Control technology. Whereas if the odors are manifest
across the collection system or treatment plant and the odor
levels are moderate, then only the BiO3 Bioaugmentation technology
would be employed. If the odor problems are widespread and
severe and there are other associated problems (concrete corrosion,
grease, compliance, or sludge reduction needs) then both technologies
would be employed to minimize the cost of the odor control.
We recently bioaugmented a 300KGD lift station for odor control
of H2S at a syphon next to an Interstate highway. From the
lift station, that only pumped 3 to 4 times per day, the wastewater
traveled 14,000 feet in a 4" force main and then dumped
into a gravity syphon. The syphon boxes on both side of the
Interstate were causing odor complaints. The BiO3 Bioaugmentation
reduced the dissolved sulfides (DS) from 10 ppm to 1 ppm.
1 ppm DS is what is measured at the wet well. So the BiO3
Bioaugmentation prevented any growth of DS in the 14,000 feet
of force main. The odor complaints ceased.
Contact Us: If you have questions and/or want to discuss
a specific problem, please contact
us . cliff@biothree.com
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