WWW.WA S .ORG • WORLD AQUACULTURE • JUNE 2022 53 • Four, 0.16-ha, aerated, clay lined, drainable ponds with a common fish collection basin for harvest. • A high-tunnel building containing two, linear raceways (20.4 m3) with flow through, degassed and aerated, cold (7.6 C) water. • A second high-tunnel building containing partial RAS technology utilizing dual-drain, round, 1,960-L tanks with integrated radial flow separators, degassing/aeration column, common sump and pump station. • Two effluent drainage settling ponds and a constructed wetland for final polishing of effluent water before discharge into an intermittent stream. Groundwater is supplied to the facility by two high-capacity wells with submersible pumps controlled by VFDs and a self-regulating head tank monitoring system that provides cold (7.6 C) or heated water (8-20 C) through gas-fired boilers. Two-stage head tanks have compartments for cold and heated water. Water is degassed and aerated before usage. This system is both highly efficient and provides a sustainable method for long-term pumping and operation with adequate backups. Further control and monitoring capability is provided by a Supervisory Control and Data Acquisition (SCADA) system that monitors information such as well pump flows and volumes, head tank levels, well pump motor start/stops, RAS system flow and volume, systemwater temperature and oxygen levels. The SCADA system is linked to a 24-hr call-out alarm system for staff to respond immediately to any issues. An emergency generator is also located on site to serve as backup power in case of electrical failure. ( C O N T I N U E D O N P A G E 5 4 ) Commercial Application of Research and Demonstration The facility operates a variety of semi-commercially scaled systems (Fig. 3) including incubation, larval and grow-out systems, with tanks ranging in size from 260 L to over 11,000 L. The facility’s main 790 m2 aquatic production barn contains adaptable, open work areas with access to cold and heated water, aeration and oxygen support. The aquatic barn contains: • CustomBell jar and Heath tray egg incubation systems for various cold and coolwater fish. • Two larval rearing rooms with 43 replicated 260-L tanks with complete water temperature, turbidity, lighting, tank inflow and environmental control. • Two modern semi-commercially scaled 23-44 m3 RAS growout systems (coolwater and coldwater) with 6-8 replicate tanks. These main RAS used for grow-out include modern efficient technologies such as Cornell-style dual-drain tanks, microscreen drum filter, fluidized sand biofiltration, degassing column, temperature control, oxygen cone or low head oxygenators and ultraviolet sterilization. • Six 1,780-L replicate RAS systems with 24, 260-L tanks. These systems include Variable Frequency Drive (VFD) controlled pumping stations, solids removal, moving bed biofiltration, oxygen supplementation and UV sterilization. • Analytical water quality testing and research laboratory. The outdoor facility (Fig. 4) includes: FIGURE 2. Species cultured at UWSP NADF for research and demonstration include Arctic char (top left), Atlantic salmon (top right), walleye (middle left), lake herring (middle right), lake trout (bottom left) and spotfin shiner (bottom right). FIGURE 3. UWSP NADF larval rearing system (top left), coldwater recirculating aquaculture systems (top right), flow-through raceways (middle left), and pond systems (middle right), clarifying ponds (bottom left) and partial reuse system (bottom right).
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