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Case Studies and
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Case Study for Customer Location CA72:
Reservoir or Lake Use:
Raw water storage reservoir ahead of the water treatment plant;
reservoir receives water via an underground pipeline from a lake
which is operated by US Army Corps of Engineers.
System Overview and Reservoir:
Surface area is 3 acres; volume is 68 acre-feet; maximum depth
is 25 feet. Average flow to plant is 0.45 MGD; average residence
time is 49 days. Reservoir is divided into two sections with an
earthen berm that is typically submerged, but at the end of the
dry season is typically exposed.
Reported Problem Before SolarBee Installation:
Objectives included controlling blue-green algae blooms,
reducing taste and odor problems, and providing submerged
macrophyte control.
SolarBee Installation:
Date: April 2003. Installed two (2) SB2500s, solar-powered, one
on each side of the center dividing berm.
Results:
Owner reported a substantial reduction in blue-green algae
blooms and submerged macrophyte growth in 2003. However, taste
and odor problems persisted throughout the year, all of which
were attributed to their water source, where the MIB and geosmin
from blue-green algae was almost certainly produced. Taste and
odor events continued into 2004, and water testing from 5
different sites confirmed that blue-green blooms in the source
lake were the source of MIB and geosmin. Transported lake water
caused the taste and odor problems observed in the raw water
storage pond where the two SolarBees were installed. Owner will
need to work with the Army Corp of Engineers to devise a
solution for the source lake’s blue-green algae problems. On the
other hand, the owner has reported a significant reduction in
various pondweeds (submerged aquatic plants) in the pond since
the SolarBee was installed.
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