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Case Studies and
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Case Study for Customer Location
MT77:
Reservoir or Lake Use:
This is a sludge storage pond that receives waste activated
sludge from the municipal wastewater treatment plant. In the
summer, some water is decanted off for use at a golf course.
System Overview and Reservoir:
The sludge storage pond is 4.5 acres in area, with a maximum
depth of 5 feet. When the SolarBee was installed, the clear
water averaged 30 inches deep, the slurry averaged 3 inches
deep, and the sludge averaged 27 inches deep.
Reported Problem Before SolarBee Installation:
Two floating aspirators were used in the past, but they did not
provide consistent odor control. They also had $36,000 per year
energy and maintenance costs.
SolarBee Installation:
Date: August 2002, one (1) SolarBee SB10000 was installed with a
24-hour solar/electric kit. Clear water in the pond was about
39" deep, and the SolarBee intake was set to bring water in at
depths between 24 inches and 36 inches.
Results:
Since installation, the SolarBee has provided consistent odor
control in all seasons, maintained consistent dissolved oxygen
levels across the pond, and has significantly reduced the
average slurry depth. Measurements made in December 2003 showed
that dissolved oxygen was 20 mg/L in the top 2 ft of the pond,
the average clear water depth was 40 inches, the average slurry
depth was 11 inches, and the average sludge depth was 18 inches;
so about 9 inches of sludge apparently was converted to slurry
in 2003. The owner is very satisfied with the SolarBee.
Photo shows ice-free conditions around the SolarBee in the
sludge storage pond
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