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Cawthron Institute is New Zealand’s largest independent science organization, offering a broad spectrum of services to help protect the environment and support the sustainable development of primary industries. Cawthron is a diverse organization employing more than 275 scientists, laboratory technicians, researchers, and specialist staff from 26 countries. Cawthron’s scientists are specialists in aquaculture research, marine and freshwater resource management, food safety and quality, algal technologies, biosecurity, and analytical testing. Its ground-breaking science is supported by substantial testing and research laboratories, state-of-the-art technology, and a purpose-built aquaculture park.


Chinook Salmon

Chinook salmon species are the largest in the Pacific salmon genus and is often referred to as King Salmon. It has gained popularity in the market due to the high amount of omega-3 fatty acids found in its flesh. However, fishing alone is not capable of meeting the demand and because its numbers have dangerously declined in the wilderness, the fish producers were pushed to find another way to meet it. Today, the largest farmed Chinook Salmon producer in the world is New Zealand as it accounts for about half of the global production. Fortunately, New Zealand is putting great emphasis on keeping its aquaculture industry as environmentally friendly as possible. As a result of this, they have been recognized as the most sustainable in the world by Global Aquaculture Performance Index in 2011.

The Chinook Salmon Research Facility

Together with Fresh By Design, ULTRAAQUA UV installed its UV systems in the Chinook Salmon research facilities for the latest Cawthron Institute project – Finfish Research Centre (FRC). The FRC facility has 6 individual systems – four large feed trial systems and two smaller physiology systems that can be run on either freshwater or seawater. The facility was designed to conduct Chinook Salmon research from fry through to harvest size. However, it can also be used for multiple fish species due to the flexibility of its design. Each of the individual systems has 8000L or 2500L liter bespoke fiberglass tanks with dual drains and swirl separators for waste collection and analysis.

polyethylen uv system in aquaculture facility
polypropylene uv system in aquaculture facility
polypropylene uv system in aquaculture facility
cawthron institute logo
polyethylen uv system in aquaculture facility
polypropylene uv system in aquaculture facility
polypropylene uv system in aquaculture facility
cawthron institute logo

PP and PEHD UV systems

The ULTRAAQUA UV systems are installed at several different locations across the facility. At the water entry point, one UV unit ensures that no dangerous pathogens get in the RAS through intake water. An additional two UV units are positioned within the production itself – for feed trial systems and physiology systems. The systems help control the microbiology of the species and to eliminate dangerous microorganisms. The FRC facility wastewater treatment process includes clarification and ozone treatment, with UV being the final step before the water is released back into the environment.

All ULTRAAQUA UV systems used in the facility are fitted with UV irradiance monitoring sensors providing superior disinfection and energy efficiency. Excellent corrosion resistance is guaranteed through polypropylene and polyethylene materials.



non corrosive polyethylene high density uv disinfection system


The Non-Corrosive PEHD series features high-density polyethylene (PEHD), ideal for…

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non corrosive polypropylene uv system


The Non-Corrosive PP series is developed specifically for disinfection in…

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“Our ULTRAAQUA UV units are integral parts of our RAS systems, they are trouble-free and we have been impressed by their performance and durability in both freshwater and seawater. The UV sensor output is a great addition and helps with our routine water quality monitoring.”

Chris Ensor, Aquaculture Operations Manager, Cawthron Institute


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