Bluegreen has constructed the Marine Donut, a floating closed containment facility for aquaculture, made of HDPE 100 RC. The facility weighs 600 tons, has a diameter of 22 meters, and a volume of 22,000 m³. It is the world's largest PE construction and represents a groundbreaking solution for sustainable fish farming.
Marine Donut is a floating closed aquaculture facility consisting of a closed unit shaped like a donut (torus). The main structure is made from High-Density Polyethylene (HDPE), a recyclable material that acts as a tight barrier against external environmental factors to prevent sea lice and disease from entering the facility.
The intake water is filtered through a Bernoulli filter and UV lamp. Marine Donut features floating pipes at the top, stiffening pipes at the bottom, and vertical ballast tanks on the sides, enabling the structure to be raised and lowered. The top of the facility includes a working platform and green energy production through solar panels.
The facility is equipped with solutions for collecting sludge and water intake below the sea lice zone. Marine Donut is designed to withstand high exposure to both waves and currents and is suitable for both post-smolt production and table fish farming. It can function as a standalone system or in combination with other technologies.
Bluegreen was responsible for the design and construction of the Marine Donut, a task that required significant innovation, including the development of a prototype "welding robot." The project received support from SkatteFUNN.
