The Mivanor Grovrens has a simple design; the construction consists of a PE tank with a Spiral Screen Screw. The open design makes it easy to access both the inlet to the tank and the buffer tank after the screw.

Mivanor Grovrens is especially suitable for wastewater from cleaning fishing nets where the water contains biofouling such as shells, seaweed and other debris derived from the net.


  • Removes and de-waters the waste in one step
  • Dry matter content of the waste up to 60%
  • Automated system which can be remote controlled

Mivanor can deliver the Grovrens as a standalone pre-treatment unit or as a part of a complete treatment system ensuring safer water emissions.

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Complete treatment system for net lofts

By combining Mivanor Grovrens and our chemical and mechanical treatment system, MivaMagTM, the Mivanor team has designed a treatment solution which is tailor-made for net cleaning lofts.

This solution has been delivered to several net cleaning facilities owned by Mørenot in Norway.

The experience from delivering the system to Mørenot has built a strong knowledge within the net washing industry, and has made our team aware of the challenges connected to larger particles and difficult pollutants such as wax and copper.

Read more about this solution

Here is how the MivaMagTM system works: