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Case Study for Customer Location
CA49:
Reservoir or Lake Use:
Partial-mix wastewater treatment system for processing
industrial wastes generated by a winery. Treated effluent is
discharged to on-site irrigation system.
System Overview and Reservoir:
The system consists of a primary and secondary cells (Cell 1 and
Cell 3, respectively), and a tertiary storage cell before
discharge for irrigation. Cell 1 is 0.3 acres, 8.0 ft deep, 0.5
MG capacity, loading is variable with estimated peak at harvest
is 127 lbs of BOD/acre/day, and the cell had 25 hp of grid
aeration operating 24 hrs/day much of the year and fulltime
during harvest. Cell 3 is 1.1 acres, 8.0 ft deep, 2.3 MG
capacity, and the cell had 7.5 hp of grid aeration operating 24
hrs/day for part of the year. Flow rate is 0.025 MGD peak at
harvest, with 100% of the flow to Cell 1, then to Cell 3, then
tertiary irrigation storage Cell 2; total system detention time
is 113 days. The effluent is discharged into an adjacent
irrigation system.
Reported Problem Before SolarBee Installation:
High energy costs associated with grid aeration requirements,
particularly in the primary cell during harvest time.
SolarBee Installation:
Date: April 2002, installed one (1) SB2500 with a 24-hour kit
into Cell 1, and one (1) SB2500 with a 24-hour kit into Cell 3.
November 2002, exchanged each unit to the larger, SB10000W with
24-hour electrical kit due to increased production at winery and
new state requirement of minimum of 2 mg/L DO.
Results:
The SolarBee-enhanced treatment system worked well from the
start and quickly reduced aeration run times. Expected energy
savings are over $20K per year with all aeration run time
displaced during peak hours. Because of the solar-powered water
circulators, the customer received a California Energy
Commission Peak Load Reduction Grant. Manager pleased with how
well the machines are running and with realized energy savings
through reduced run time for aerators.
Photo shows one SB10000 and one splasher (not turned on) in Cell
1
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