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Case Study for Customer Location
WI91:
Reservoir or Lake Use:
This reservoir is on the backwaters of the Mississippi River.
Area was dredged and material used for building railroad bed.
Public has access from Mississippi River for recreational
fishing.
System Overview and Reservoir:
Surface area is 27 acres, with an estimated maximum depth of 20
feet and an average depth of 18 feet.
Reported Problem Before SolarBee Installation:
Poor mixing and blue-green algae blooms. High hydrogen sulfide
(H2S) concentrations in the bottom waters, resulting in high
dissolved oxygen (DO) demand. Existing grid type aeration has
high maintenance, uses lots of energy, and mixes poorly
increasing potential for fish kills.
SolarBee Installation:
Date: August 18, 2004. Installed one (1) SB10000v12 in the
deepest area of the reservoir. Intake hose initially set at
14-15 feet.
Results:
In the fall of 2004, the intake hose was raised to about 10 feet
to provide better oxygenation of upper waters and to prevent H2S
from escaping and causing odors. The owners also reported good
fish activity throughout the reservoir. In January 2005, under
ice conditions, they measured 17 mg/L of DO in the top few feet
and 7.0 mg/L near the bottom. They had never before recorded DO
this high and deep in the winter. By early March 2005, DO
concentrations still remained above about 5 mg/L throughout the
water column. A welcomed additional benefit was the increase in
water temperatures during the winter. The SolarBee kept a much
smaller area of open water than their old 25-hp aerator did,
allowing for less exposed water to the subfreezing air
temperatures; water remained open about 12 feet around SolarBee
during very cold conditions. As a result, water temperatures
were approximately 2°C higher than what was seen in past years.
Owners believe that the warmer water temperatures, combined with
the high DO, provide better over-wintering habitat for fish in
the Pond. The owner is very happy with the results and the
savings by no longer running the aerator.
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