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Recent
Case Studies
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BIO-KAT Bio-Activator was selected for use in a pilot study
program at a domestic wastewater treatment facility in South
Florida. The facility is privately owned and operated, and receives
little to no industrial contributions. The facility serves surrounding
mobile home parks and apartment developments, comprising approximately
1564 equivalent residential connections (ERC's). The community
population varies seasonally in the mobile home parks, but the
apartments and other residences are occupied year round, generating
diurnal flows of " 0.2 - 0.4 MGD. The plant operates in
a modified activated sludge mode, with a design capacity of
0.6 MGD. Effluent is discharged to impounded rock pits (surface
waters), with an emergency discharge capability to tidal canals.
The components of the plant consist of an equalization basin
(surge tank), a common aeration basin that discharges to (2)
secondary clarifiers, effluent filters, a chlorine contact chamber
and a facultative sludge holding tank (digester). Bio-solids
dewatering is not provided and liquid sludge is hauled away
for disposal. |
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facility has been experiencing some problems with regard to
grease handling and odors in the collection system. At the treatment
plant, scum formation, algae, odors, sludge settling and bio-solids
concentration required attention. The operators have been making
every attempt to mitigate these conditions through the use of
masking agents, enzymes and other chemical products. Minimal
success has been achieved with regard to the use of enzymes
in the digester, but for the most part, the others have been
ineffective. |
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Following routine investigative procedures, it was agreed to
administer the BIO-KAT product into the collection system at
(3) points, two of which are immediately upstream of the lift
stations that were experiencing problems with grease and odors,
and the third directly into the wet well of that station. Initially,
a dosage of 2.0 ppm was selected to immediately treat the measured
flows. This dosage would eliminate Hydrogen Sulfide and begin
to emulsify the accumulated fats, greases and oils and break
down the occluded grease layers that existed in the piping and
appurtenances. |
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In addition to the administration of the product into the collection
system, the product was also added to the raw wastewater at
the equalization basin (Surge Tank), at a dosage of 1.0 ppm.
This was performed in order to increase the respiration rate
of the microorganisms immediately upon contact with the raw
wastewater, the food source. Theoretically, this would increase
the nitrification rate and decrease the ultimate time required
to stabilize the organic load to the process. |
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Test results of the plant effluent were obtained from the time
three weeks subsequent to beginning the administration of the
product, and compared to the data from one year previous, during
similar flow conditions. The results indicate reductions in
concentration for the parameters, which demonstrate the effectiveness
of the product. |
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The
test results indicate the following: |
The
BOD (Biochemical Oxygen Demand) concentration was reduced by>90
%
The Nitrite Nitrogen (NO2-N) concentration was reduced by 50
%.
The Nitrate Nitrogen (NO3-N) concentration was reduced by 14.6
%.
The Total Kjeldahl Nitrogen (TKN) concentration was reduced
by 74 %.
The Ammonia Nitrogen (NH3-N) concentration was reduced by 91.9
%.
The Total Nitrogen (as N) concentration was reduced by 13.5
%. |
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The
results of the analyses are attached for review.
These
results indeed indicate that the nitrification process has
been accelerated by the use of the BIO-KAT product. The operators
of the facility also report a significant breakdown of the
accumulated grease layers in the collection system and lift
stations and these materials are being screened out, removing
them from the processes.
Significant improvements have also been observed in the secondary
clarifiers of the treatment plant. The formation of a scum
layer on the surface of the clarifiers has been eliminated
and the sludge blanket settles more rapidly, with no colloidal
solids, producing an effluent that is remarkably clear and
free of turbidity.
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©2001Natural
Resource Protection, Inc. All Rights Reserved
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