In 2017, Atlantic Sapphire lost 250 tonnes of salmon in a mass die-off due to hydrogen sulphide poisoning from accumulated organic matter, an all-too-common problem in aquaculture with significant economic losses.
Growing salmon in land-based tanks in which water is continuously circulated (Recirculating Aquaculture Systems, RAS) means low waste discharge and high-levels of water re-use, but also sporadic toxic microorganism outbreaks that cause costly mass fish stock die-offs.
FluoRAS, Horizon 2020 COLUMBUS and EMFF ECO-AQUA are putting in place aquaculture trials of a fluorometer sensor system that can monitor organic matter online, and potentially reduce the risk of these die-offs. The FluoRAS system can potentially categorise and quantify different types of organic matter which accumulate in closed systems. The initial trials, using Chelsea Technologies Group BACTI-Wader Pro, will aim towards a real-time alert system, that gives enough warning time for operators to respond and avoid a potential toxic bacteria outbreak.
"If successful, the system can also save significant costs on energy consumption. Currently Recirculating Aquaculture Systems use energy-intensive UV treatment of the water and real-time organic matter monitoring systems, such as the CTG BACTI-Wader Pro, will give more control over the dosages required for UV treatments," reports CTG's Sam Kirby.
To learn more about the core technological solution see FluoRAS Sensor - Online organic matter for optimising recirculating aquaculture systems
The narrative is based on COLUMBUS Knowledge Transfer Case Study FluoRAS by Ivo Grigorov & Adam Hambly. For the full compilation of COLUMBUS Case Studies and their Impact, visit http://www.columbusproject.eu/project-results
BACTI-Wader and BACTI-Wader Pro provides instant measurements of water-borne bacteria that gives enough warning for operators to respond and avoid a potential toxic bacteria outbreak.
NOTES TO EDITORS
Chelsea Technologies Group (CTG) is a leading manufacturer of sensors & systems for the maritime, marine science, water environmental, defence and process control markets. With over 50 years' experience, CTG specialises in optical, acoustic and physical sensors measuring algae, bacteria, hydrocarbons and water clarity.