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2021 workshop - The future of Recirculating Aquaculture Systems (RAS)

4 May 2021 - 9:00am to 6 May 2021 - 12:30pm

NIWA is hosting a three day workshop in Ruakaka, New Zealand, that includes a site visit of their Recirculating Aquaculture Systems.

Recirculating aquaculture systems (RAS) recondition and re-use water and have attracted considerable venture capital worldwide. In this workshop, we will provide non-biased and research-based information about these systems. The information presented comes from the first-hand research results and the experiences of the presenters, collaborators and our colleagues around the world. The registration fee includes applicable resource materials. 


Tentative dates: 4 - 6 May 2021

Main topics that will be discussed

  • Modern RAS and it’s role in New Zealand’s aquaculture future
  • Environmental footprint and waste stream management/utilization
  • The state of the art and innovation in RAS
  • Economic analysis of RAS and the supply chain
  • International case studies
  • RAS aquafeeds
  • Production species and breeding for success

More information about the event will be available soon.


Please email Dr Javed Khan if you would like to secure a spot or have any questions: [email protected]



    On site

    The workshop will be held in New Zealand at the Northland Marine Research Centre (NMRC), situated on 8.2 hectares of freehold coastal industrial land located in Ruakaka, two hours’ drive north of Auckland. The facility supports scientific research and commercial aquaculture operations and holds a commercial fish farm licence covering 45 species. A recently completed infrastructure upgrade includes the first land-based yellowtail kingfish farm in the country. NIWA’s expansion at Ruakaka is designed to show investors there are exciting economic opportunities to develop sustainable land-based aquaculture facilities in New Zealand. Recirculating Aquaculture Systems (RAS) are attracting more investors worldwide and NIWA’s team of experts are well-placed to offer advice and technical services.

    Water supply and treatment

    The site has consent and capacity to draw and discharge up to 4 cubic metres per second of seawater. The current operation supplies 350 litres per second of seawater to the research and commercial end-users, with integrated 10-micron filtration, UV light and ozone treatment. The water is monitored at input and discharge and all research areas are supplied with oxygen from a central liquid oxygen system monitored at high-resolution throughout. Building Management Systems (BMS) and precise monitoring provide continuous systems control. Particulate waste is intercepted and managed by anaerobic digestion. 


    The NMRC operates 195 tanks, providing 1660 cubic metres of rearing space and experimental units. Each can be used to investigate stock and system performance under intensive production conditions. This includes multiple broodstock tanks equipped with automatic photothermal control that are suitable for multiple species, larval rearing tanks and a large feed trial unit. On a commercial scale, the facility also operates a marine fish hatchery and juvenile production facility, producing approximately 1 million fish per year. 


    NIWA Northland Marine Research Centre
    Station Road
    0116 Ruakaka