Recirculating aquaculture systems from equipment design and manufacturing to equipment supply and installation support at your fish farm development or any land based aquaculture application.

Recirculating aquaculture systems - ras


Compete recirculating aquaculture system

RAS Skid Filtration Units

Fully integrated plug & play and factory tested RAS filtration technology. It covers mechanical, biological, chemical and disinfection filtration processes and state of the art monitoring with low energy consumption and ease of operation. RAS Skids are tailor made solutions to fit your needs, site conditions and available space.

Freshwater protein skimmer aquaculture

Freshwater Protein Skimmers

Seafood farmers, especially Salmon Farmers, requested MAT-KULING to develop an efficient Freshwater Protein Skimmer able to perform in fresh and brackish water conditions and installed for land based salmon tanks. The protein skimmer is an add-on to the existing filtration setup.

Foam fractionator aquaculture

Saltwater Protein Skimmers

The Protein Skimmers made of PE & PP bodies come ready with Venturi pumps, automated protein foam level control, skimmer cap sludge autowash, control panel & ozone/oxygen intake. Assembled and hydrotested ready for installation.

Drum filters for aquaculture

Drum Filters

Drum Filters suitable for aquaculture fish farms, salmon farms, saltwater applications or hippopotamus zoos and elephant zoological water.

Ozone generators suitable for aquaculture farms & fish hatcheries

Ozone Generators

Ozone Generators designed and tested for RAS applications. Fabricated in respect with EU & US HSE guidelines in our factory with quality components easy to repair or replace. Equipped with control panel and optionally with oxygen concentrators, air chillers and air dryers.

Mbbr aquaculture moving bed biofilm reactor filter

Moving Bed Biofilter Reactors (MBBR)

The MBBR filters are made of PP plastic and they are designed to create proper media swell, allowing maximum bacteria oxygenation with minimal backwash requirements. Filled with floating biomedia will provide optimum biological filtration support.


NIVA (Norwegian Institute for Water Research) officials, performed an independent, field trial on MAT-KULING freshwater protein skimmer performance in a salmon farm in Norway and reported more than 70% particles removal.

Particles removal during time diagram in freshwater protein skimmers
Particles Removal During Time in Freshwater Protein Skimmers

Filtration Systems for Intensive Aquaculture Farms

We fabricate low energy consumption Water Treatment equipment for biological filtration, mechanical filtration, and disinfection solutions in the aquaculture industry.

Recirculating aquaculture systems


Ras manufacturer supplier

MAT-KULING is a Norwegian manufacturer of high quality water treatment equipment co-owned by MAT FILTRATION TECHNOLOGIES and KULING VANNBEHANDLING and is specialized in Recirculating Aquaculture Systems (RAS) for Land Based Aquaculture. MAT-KULING is not focusing on building fish farms or providing turn key fish operator solutions. Our technology covers from equipment design and manufacturing, and supply to training and installation support at your fish farm development or any land based aquaculture application. Our RAS equipment range covers the latest technology in mechanical and biological filtration as well as disinfection systems such as ozone and UV solutions. On the contrary, it aims to be subcontracted for the complete filtration scope supply and installation support for all MEP and RAS equipment of a fish farm or hatchery. We sell equipment and we guarantee our filtration technology will meet and exceed the policy requirements set by fish farm operators.

Learn More About MAT-KULING


RAS Engineering beyond your Expectations

Meet marine & freshwater biologists, hydraulic & aquaculture engineers constantly designing new equipment simple in operation that deliver optimum water quality.

Recirculating aquaculture systems for fish farms


Usage project by niva, norwegian institute for water research
Aquaponics NIVA USAGE Project

USAGE Project by NIVA, Norwegian Institute for Water Research

MAT-KULING in the USAGE project had the honor to design, manufacture, install and commission the Aquaponic system in close cooperation with its partner NIVA, which was delivered to Norway and Poland.

View Project USAGE Project by NIVA, Norwegian Institute for Water Research
Advanced ras for the ferme piscicole des bobines trout farm
RAS Technology & Equipment for Les Bobines Rainbow Trout Fish Farm

Advanced RAS for the Ferme Piscicole des Bobines Trout Farm

The latest MAT-KULING technology and equipment at Ferme Piscicole des Bobines land based trout fish farm, recycles and filters rearing water, while ensuring compliance with the highest environmental standards.

View Project Advanced RAS for the Ferme Piscicole des Bobines Trout Farm