Water from the research facility discharges into a wastewater treatment building and passes through
micro-screen drumfiltration, an inclined traveling belt screen to exclude all eggs or fish fromthe discharge,
and UV irradiation to disinfect the water. The facility was completed in June 2007, and all water used in the
facility has been fromgroundwater sources. Mean facility discharge has been approximately 0.50 m3/min
(130 gpm). The facility was designed for stocking densities of 20–47 kg/m3 and a maximum biomass of
26,000 kg. The maximumsystemdensity obtained fromJune 2007 through January 2008 has approached
40 kg/m3, maximumfacility biomass was 11,021 kg, water exchange rates have typically been 2–3% of the
recirculating system flow rate, and tank temperatures have ranged from a high of 15.4 8C in July to a low of
6.6 8C in January 2008 without supplemental heating or cooling.