Supporting stable water quality in RAS systems

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Supporting stable water quality in RAS systems

In recirculating aquaculture systems, water is continuously reused. This makes the system efficient, but also sensitive to microbiological build-up, biofilm, suspended contamination and fluctuations in water quality.

CWN assesses each installation to determine whether nano cavitation can contribute to a better controlled water circuit, as an addition to existing filtration, biofiltration, UV or other water treatment.

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Why RAS water requires continuous attention

In a RAS system, high stocking density, feed load, excretion, organic matter, biofiltration and recirculation come together.

As a result, microbiological pressure can build up in basins, pipes, filters, silos and other wet parts of the installation.

When the load increases or certain zones have less effective flow, the system can become more sensitive to contamination, biofilm formation and fluctuating water quality.

Nano-cavitatie in water

What CWN adds

CWN applies nano cavitation as an additional physical treatment within the water circuit. The application is tailored to system volume, flow rate, water load, existing water treatment and critical zones.

  • More control over microbiological pressure in the water circuit
  • Support for existing filtration, UV or water treatment
  • Less recurring contamination in basins and pipes
  • More stable water quality in recirculating systems
  • Technical assessment for optimal placement
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From reacting to more stable system control

A RAS system requires balance between water quality, fish density, feed load, biofilter and flow. CWN therefore does not look at one isolated problem, but at the complete water circuit.

If CWN is technically suitable, we validate this with a pilot under practical operating conditions. This makes it visible whether nano cavitation can contribute to more stable water quality and better control over system behaviour.

Discuss your water system

Frequently asked questions about RAS systems

Short answers to frequently asked questions about recirculating aquaculture systems, water quality and the use of CWN Free and Tube.

Does CWN replace the biofilter in a RAS system?

No. CWN does not replace the biofilter. The technology is applied as an additional physical treatment within the water circuit. The biofilter retains its own function within the nitrogen cycle and biological stability.

Are CWN Free and Tube safe for fish?

Yes, CWN is assessed on a project-specific basis for flow, volume, positioning and system design. In aquaculture, we always look at application within the water circuit without directly disturbing animal welfare.

When is the CWN solution relevant for a RAS system?

CWN is particularly relevant when microbiological pressure, biofilm, suspended contamination or fluctuating water quality are recurring points of attention within a recirculating system.

Where is CWN installed in a RAS installation?

That depends on the installation. Possible locations include basins, pipes, bypasses, return flows, silos or zones where organic load, recirculation and microbiological pressure come together.

How do we demonstrate the impact of CWN?

We define together in advance which goals are important for your installation. During a pilot, we monitor these through measurements and practical observations, for example water quality, microbiological load, contamination, biofilm-sensitive zones and system stability. This makes the contribution of CWN visible within your own RAS system.

Would you like to know whether CWN fits within your RAS system? Based on system volume, flow rate, fish density, existing filtration and measurement data, we assess whether a pilot is technically relevant.

Discuss your water system