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Wittrup Seafood A/S (WIS) – Denmark

About The WIS Mussel Farm

WIS is a well-established company that produces, processes, and sells blue mussels to consolidated markets in France, BENELUX, Germany, and Scandinavia, these are mainly commercialised to wholesale, supermarkets, and catering.

Yearly, WIS produces about 4000 t of mussels. The company is mainly self-sufficient in mussels owning several mussels’ operations with long-line systems in the Limfjord and on the East Coast of Jutland. More recently, a new part of the company also provides services to habitat restoration projects, and they are looking for market opportunities for small unutilised mussels.

Since its establishment, WIS has destined energy and resources for continuous improvement and development. Recently, they developed a novel submerged mussel farm technology that has no visual effects and will not be affected by ice cover. An advantage of this submerged technology is that the mussels can overwinter during a possible ice formation and grow further the following season, allowing producers to harvest when the mussels have reached the market size for human consumption or when the market is favourable. Additionally, the submerged system cannot be seen from the surface, therefore not disturbing citizens or affecting recreation areas, which results in increasing support for mussel production.

As part of Baltic MUPPETS, WIS works on two business models:  

  1. Industrial production of mussels on submerged mussel farms with low production costs, and with the export of small mussels from harvest in autumn for pet food production, and sale of large mussels from harvest in spring/summer for high-quality food. 
  2. Sale and supply of mussel production technology and know-how to the national and international market.

For the first business case, and together with Blue Research, WIS will establish a permanently submerged mussel farm with modules with nets on submerged pipes, optimize the production, and harvest the mussels using a harvester that can harvest the production modules below the water using advances technology. For this, the Danish consortium will establish –at two sites– 120 submerged mussel units with the capacity to harvest 1000 t small mussels (2-3 cm) in autumn and 2000 t large mussels for fresh consumption in the next summer. Small mussels will be processed to mussel powder at Västervik, in Sweden.