Fishmeal and fish oil production

Fishmeal

Fishmeal, a dehydrated marine powder, is a valuable resource with Danish variants typically comprising an average of 71% fish protein and 8% fish oil, alongside essential minerals and water. This marine-derived product plays a pivotal role as a highly digestible protein and oil source in feeds, finding extensive application in both aquaculture and agriculture.

The nutritional profile of fishmeal renders it a sought-after ingredient for supplementing protein in feeds across diverse sectors. Its appeal extends to aquaculture as well as animal husbandry, benefiting species such as poultry, piglets, young calves/lambs, furred animals, pets, fish, and shrimps. The inclusion of fishmeal in these feeds contributes not only to protein content but also imparts several nutritional qualities, enhancing the overall health and growth of the targeted species. As a result, fishmeal stands out as a versatile and indispensable component in the formulation of feeds, supporting the sustainable development of various segments within the agricultural and aquacultural industries.

Fish oil

Fish oil, a 100% marine-derived oil, boasts a rich concentration of vital omega-3 fatty acids. Primarily utilized in crafting feeds for farmed fish, it also plays a crucial role in producing refined fish oil intended for human consumption.

This marine oil stands out for its exceptional nutritional value, particularly in delivering essential omega-3 fatty acids that contribute significantly to human and aquatic animal health. Its versatility spans from supporting the growth and well-being of farmed fish to meeting the dietary needs of discerning consumers seeking high-quality, refined fish oil. In essence, fish oil serves as a key component in bridging the nutritional requirements of both aquaculture and human consumption, underlining its significance in promoting holistic health across diverse domains.

Production process

The production process for fishmeal and fish oil from short-lived species is a systematic sequence involving boiling, separation, drying, and milling.

1. To begin, the raw material undergoes boiling within its own juices, facilitated by an indirect steam supply. This process leads to the formation of a solid fraction, known as the presscake, and a liquid fraction, referred to as the presswater.
2. Next, a decanter separates the solids from the liquid, channeling the solids back into the presscake. The fish oil extraction from the liquid fraction is accomplished through centrifuging, leaving behind a residual liquid known as “stickwater.”
3. The stickwater undergoes evaporation, resulting in a product termed “solubles.” Subsequently, the presscake and solubles are dried using indirect steam in a dryer, achieving a moisture content of 5-10% in the fishmeal.
4. Post-drying, the fishmeal receives the addition of antioxidants, undergoes cooling, and is milled to attain the final product. Following thorough control and analysis, the fishmeal stands ready for packaging and delivery. This meticulous process ensures the production of high-quality fishmeal and fish oil, meeting rigorous standards for both nutritional content and product integrity.

For more information read the report from Nordic Centre of Excellence Network in Fishmeal and Fish oil – click here