Method for obtaining proteins or a rich-protein extract from algae, extracts and uses therefore

The present disclosure relates to disrupting algae cell walls, in order to obtain protoplast with high nutrient digestibility for use as a food ingredient and/or as feed for farmed fish and shellfish species, which leads to the production of added value sea food items and to more sustainable and better performing food chains. The present disclosure described a method for obtaining proteins or a rich-protein extract from algae, comprising the steps of: disrupting a cell wall of algae by physical-mechanical means using a vibratory grinding mill with rings; submitting the disrupted algae to an enzymatic hydrolysis carried out with a mixture of enzymes; wherein the enzyme mixture is a mixture of at least two enzymes selected from the following list: lipase, pectinase, cellulase, hemicellullase, endo exo-arabanase, amylase, or mixtures thereof; provided that at least one of the enzymes is lipase, pectinase, amylase.