Gelatin and hydrolysed collagen obtainment from fish filleting process offals.

Fishcol project aims at:
- obtaining fish gelatins from skins of cold water fish, performing higher features than those currently on the market.
- obtaining fish gelatins and hydrolysates from other byproducts of cold-water fish (scales and bones).

Gelatin is obtained by the hydrolysis of collagen which is the principal protein found in skin and bones. The raw material for cold water fish gelatin is the skin from deep water fish such as cod, haddock and pollock, and is obtained from local salt fish and frozen fish processors. The uniqueness of fish gelatin lies in the amino acid content of the gelatin. Although all gelatins are composed of the same 20 amino acids, there can be a variation in the amount of imino acids, proline and hydroxyproline. With lower amounts of these amino acids, there is less hydrogen bonding of gelatin in water solutions, and hence a reduction in the gelling temperature. Gelatin from cod skin gels at 10ºC, whereas gelatin from carp skin would be more similar to animal gelatin, which gels above room temperature. Most people think of gelatin as a food additive or part of photographic film. With a lower gelling temperature, other commercial applications of fish gelatin can be developed. Fish living in warm water have a different composition of their collagen than fish swimming in cold water. Gelatin from warm water fish resembles the gelatin from bovine and porcine animals. It has gelling properties, with a gel strength measured with the Bloom number, good film forming properties and excellent water holding properties. Gelatin from cold water living fish, by contrast, does not gel for any practical purposes, and for a long time industrial applications were limited. FISHCOL explores new technologies to turn this situation. When gelatin from various sources are hydrolyzed, their properties and characteristics different from the start, the properties will converge and be more and more alike. A total hydrolysis will yield amino acids. FISHCOL project responds to the growing interest in the pharmaceutical and dietary industry worldwide for gelatins obtained from cold water fish. Therefore, it is the aim of FISHCOL to produce high quality fish gelatins and hydrolysates from cold water fishes at origin. The high transport costs of the usual raw materials -frozen skins transported from long distances (Iceland, China, etc.), added to the difficulties of combining this product with other products in Junca Gelatines’ factory (porcine and bovine) have motivated Juncà Gelatines to move this production closer to the area where the by-products are generated. On the other hand, producing these derivatives of collagen in a plant specifically designed for them, optimizes resources and allows a better management of manufacturing and quality of the final product. The final objective of producing marine hydrolysates of collagen, but also fish gelatin (from cold water fishes) makes arise the technological challenge of developing appropriate drying technologies. Usual drying tunnels in gelatin plants can not be used since the melting point of the gelatin is too low. Codland possesses the technological competence to develop the most suitable drying technology for this process. Very few companies in the world are currently producing this type of gelatin from cold water fish. Furthermore, these gelatins that are currently on the market have very limited functional properties as the drying methods used may affect adversely its potential quality, or are prohibitively expensive. FISHCOL's workplan for main development tasks is as follows: 1- Manufacturing process for obtaining gelatin from cod skins and other cold water fish species: - Study and evaluation at laboratory-scale of the Juncà process for cod hydrolysate to cod gelatin. - Assessment and validation at laboratory-scale of drying systems for cod gelatin. - Study, identification and quantification other fish skins available in Iceland. - Analysis of interesting skins and carry out of previous extraction tests. - Optimization at pilot scale of the best processes for manufacturing cod gelatin - Evaluation at laboratory-scale the gelatin process of cod gelatin to skins from other fish species. - Validation at pilot scale of the selected cod gelatin drying systems - Validation at pilot scale of the process of cod gelatin to skins of other fish. 2- Manufacturing process for obtaining gelatin and hydrolysates of collagen from scales and fishbones from cod and other cold water fish species. - Identification and study of other fish by-products available in Iceland. - Analysis of interesting materials and carry out of previous extraction tests. - Evaluation at laboratory-scale of manufacturing processes for gelatin and hydrolysates from the identified alternative materials. - Evaluation at laboratory-scale of drying systems suitable for gelatin and hydrolysates. - Validation at pilot-scale of processes for the manufacture of gelatin and hydrolysates from the identified alternative materials. - Validation at pilot-scale of gelatin and hydrolysates drying systems for the identified alternative materials. 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Project ID: 
11 262
Start date: 
Project Duration: 
Project costs: 
550 000.00€
Technological Area: 
Food Processing
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.