Production of valuable products from viscera / Production of valuable products from viscera
Fish stew is rich in many different substances such as protein, fish oil and minerals, which can be good in all kinds of valuable products. The purpose of the project was to investigate the possibility of using material from slag for pet food and / or fertilizer for plants. Cod processing with and without liver was performed with enzymes: on the one hand Alkalase and on the other hand a mixture of Alkalasa and cod enzymes. Attempts were made to collect fat phase from the slag. The fatty phase was analyzed for fatty acids and peroxide values were measured to assess the degree of development. The protein component was then spray dried and the following measurements were performed: protein content, amino acid analysis, trace element measurement, antioxidant activity (metal chelating ability, DPPH, ORAC, reducing ability and antioxidant activity in the cellular system) and antihypertensive activity. The main results are that the enzymatic slag has an excellent ability to bind to metal and can thus maintain metals (minerals) in a form that both plants and animals can use. The amino acid composition was also very suitable as nutrition for dogs and cats.
Fish viscera is rich in many different materials, such as protein, oil and minerals that can be good in all kinds of valuable products. The purpose of this project was to investigate the possibility of utilizing materials of viscera in pet food and / or fertilizer for plants. Viscera from cod processing with and without liver was processed with the following enzymes: Alcalase and a mixture of Alcalase and cod enzymes. Attempts were made to collect the lipid phase of the viscera. Fatty acids were analyzed in the lipid phase and measured peroxide values to assess the degree of rancidity. The remaining protein solution was spray dried and the following measurements performed: protein content, amino acid analysis, measurement of trace elements, antioxidant (metal chelating, DPPH, ORAC, reducing ability and antioxidant activity in cell systems) and blood pressure lowering activity. The main conclusion is that hydrolysed viscera protein has excellent ability to metal chelation and can thereby maintain metals (minerals) in the form that both plants and animals can utilize. Amino acid composition was also very suitable as nutrition for dogs and cats.
