Low Head Recirculating Aquaculture Systems (LHRAS)
نویسنده
چکیده
A low head recirculating aquaculture system has been designed, constructed, and is being tested at the Vriginia Tech Aquaculture Lab. Each recirculating system contains two grow-out tanks; a filtration vessel containing a microscreen drum filter; and four rotating biological contactor (RBC) biofilters; sixteen airlift pumps (eight per tank); a regenerative blower with air lines, vacuum lines, and air distribution manifold; a discharge pipe; and a fresh water supply. Each grow-out tank (20 feet [6.1 m] long, 5 feet [1.5 m] wide, and 3.3 feet [1 m] deep) holds 2468 gallons (9342 liters). The filtration vessel is 22 feet [7 m] long, 2 feet [0.7 m] wide, and 2.25 feet [0.68 m] deep and contains 740 gallons (2802 liters). The microscreen drum filter consists of a 22 inches (56 cm) diameter drum covered with 120μ stainless steel mesh screen, a 10 inch (25 cm) diameter pipe/axel, a stainless steel frame, vacuum head, and a 0.05 hp (38 kW) gearmotor.
منابع مشابه
Microcontrollers in Recirculating Aquaculture Systems
Closed-system aquaculture presents a new and expanding commercial opportunity; however, presently there are few profitable commercial operations. Intensive aquaculture systems require a sufficient supply of oxygen and nutrients in temperaturecontrolled water with a means of removing wastes from the system. In properly controlled recirculating aquaculture systems, stocking rates of up to one-hal...
متن کاملRecirculating Aquaculture Systems - a Review
1. Current State of Aquaculture and Environment 2. Aquaculture Water Constituents 3. Waste Water Discharge Guidelines for Aquaculture 4. Introduction to Recirculating Aquaculture Systems (RAS) 5. Recirculating Aquaculture System Applications 6. Primary Clarification – Suspended Solids removal 7. Bacterial Processes 7.1 Nitrification 7.1.1 Nitrition 7.1.2 Nitration 7.2 Denitrification 8. Filtrat...
متن کاملRecirculating Aquaculture Tank Production Systems A Review of Current Design Practice
tion method when temperature, salinity, disease, water supply, land availability, or exotic species /environmental regulations prevent more cost effective alternatives. A recirculating aquaculture system (RAS) can also be used to support traditional pond or net pen culture through broodstock or fingerling production. Recirculating systems have been widely used in research laboratories and unive...
متن کاملResearch Article: The effect of media biofilter and aquatic plant (Ceratophyllum demersum) on water quality of recirculating aquaculture systems, growth and survival rates of ornamental fishes
This study was conducted in order to compare the hornwort aquatic plant (Ceratophyllum demersum) with an artificial filter for purification in a recirculating aquaculture system (RAS). At first, the fluctuation of nitrogen components of the water reuse system equipped with artificial filtration was evaluated. Experiments were performed during three months. The hornwort aquatic plant was collect...
متن کاملSimulation of Recirculating Aquaculture Plants
Aquaculture, the farming of fish and aquatic crops such as kelp and algae, is classically done in natural bodies of water. In land-based recirculating aquaculture systems (RAS), however, tanks or raceways contain the farmed species and the water is circulated through a treatment system. Benefits compared to traditional farming in open cages include reduced emissions of nutrients, less risk of i...
متن کامل