Educational RAS for the Vodňany High School of Fishery
We had the opportunity to collaborate on an aquaponic greenhouse project for the secondary fishing school in Vodňany. Our task was to build and install an educational RAS consisting of two independent systems.
The horizontal RAS consists of circular rearing tanks, filtration technology, and a retention tank. This RAS is used for rearing thermophilic fish, particularly African catfish and Nile tilapia.
The vertical RAS consists of a rearing trough, filtration technology, and a retention tank. It is mounted on a stainless steel stand, forming a compact rearing unit with a vertical configuration. In an aquaponic greenhouse, it is used to rear fry of thermophilic fish.
Both systems are controlled and monitored by the SENECT control system, which monitors the basic physical and chemical parameters of the water in both systems in real time. It also controls and monitors the operation of all equipment, particularly the drum filter, pumps, UV lamps, heating system, automatic feeders, etc.
Aeration for both systems is provided by a central Roots blower manufactured by Kubíček Blowers.
The microclimate in the rearing facility is controlled by an air conditioning and heating unit that maintains constant humidity, temperature, and optimal CO2 concentration.
Any power outages are handled by an automatic diesel generator.
Technical Specifications
RAS: Circular Tanks
- Rearing tanks: 1,000 L, 3 units
- Sedimentation filter: Radial flow settler
- Mechanical filter: Drum filter, 70 microns
- Biological filter: Moving Bed Bio-Reactor (MBBR), 2 m³
- Recirculation pump: rated capacity 20,000 L/h, actual capacity 12,000 L/h, power consumption 205 W
- Central Roots blower: flow rate 490 l/min, power consumption 290 W
- UV lamp: 55 W
- Heating: instantaneous water heater with thermostat, 2000 W
- Monitoring and control: SENECT Aquaculture PRO (online monitoring of O₂, pH, temperature, and water level + equipment control)
- Automatic water replenishment
- Linn Profi 5 kg automatic feeders
- Total volume: approx. 6,000 L
- Flow rate: 6,000–12,000 L/hour, depending on system settings
- Average power consumption: approx. 500 W/hour, depending on specific settings
- Completion: 2025
RAS: rearing trough
- Rearing tank: 500 L,
- Mechanical-biological filter: 500 L
- Retention tank: 500 L
- Recirculation pump: rated capacity 12,000 L/hr, actual capacity 8,000 L/hr, power consumption 95 W
- Central Roots blower: capacity 490 L/min, power consumption 290 W
- UV lamp: 55 W
- Heating: 500W heating elements with thermostat, 2 units
- Monitoring and control: SENECT Aquaculture PRO (online monitoring of O₂, pH, temperature, and water level + equipment control)
- Automatic water replenishment
- Total volume: approx. 1500l
- Flow rate: 1,500–6,000 L/hour, depending on system settings
- Average power consumption: approx. 200 W/hour, depending on specific settings
- Completion: 2025
You can find the RAS tutorial video here: https://www.facebook.com/reel/1930354167901876
