A method for recovering copper from waste nets, preferably from waste fish farming nets protected by copper-based antifouling coatings and containing predominantly copper oxide Cu 2 O, pigments, binders and waxes, characterized by including the following steps: A) washing of nets in a washing liquid containing between 80 to 100 % of water and between 0 to 20 % of a washing additive; wherein a result of the washing is a suspension of a washing liquid, sludge and other impurities such as paraffins and copolymers, wherein the sludge contains copper compounds in the form of Cu 2 O, CuO and Cu 2 Cl 3, impurities and rests of the antifouling coating, particularly paraffins and the EVA co-polymer; B) separation of the sludge from the suspension from step A, wherein the sludge, after the separation, comprises: - copper compounds in the form of copper oxides Cu 2 O and CuO and copper oxychloride Cu 2 Cl 3, - unseparated washing liquid, and - a rest containing especially impurities accumulated on the nets and residues of the antifouling coating, especially paraffins and EVA co-polymers; C) dissolution of the sludge in an acidic medium at temperatures ranging from 0 to 100 °C for 1 to 4 hours, wherein the acidic medium is a strong mineral acid, a mixture of strong mineral acids or a mixture of one or several strong mineral acids with H 2 O 2, where the copper compounds contained in the sludge get dissolved, wherewith a solution is obtained, wherein the concentration of copper ions Cu 2+ in the acidic medium amounts to at least 20 g/L, and a non-dissolved residual sludge; D) separation of the non-dissolved residual sludge from the solution, wherewith a solution of Cu 2+ ions in the acidic medium is obtained, said medium representing an electrolyte that is then led to an electrolytic cell; E) electrolysis of the solution of copper ions Cu 2+ in the acidic medium, obtained in step D, in the electrolytic cell, where elementary copper gets deposited on the cathode. A) washing of nets in a washing liquid containing between 80 to 100 % of water and between 0 to 20 % of a washing additive; wherein a result of the washing is a suspension of a washing liquid, sludge and other impurities such as paraffins and copolymers, wherein the sludge contains copper compounds in the form of Cu 2 O, CuO and Cu 2 Cl 3, impurities and rests of the antifouling coating, particularly paraffins and the EVA co-polymer; B) separation of the sludge from the suspension from step A, wherein the sludge, after the separation, comprises: - copper compounds in the form of copper oxides Cu 2 O and CuO and copper oxychloride Cu 2 Cl 3, - unseparated washing liquid, and - a rest containing especially impurities accumulated on the nets and residues of the antifouling coating, especially paraffins and EVA co-polymers; - copper compounds in the form of copper oxides Cu 2 O and CuO and copper oxychloride Cu 2 Cl 3, - unseparated washing liquid, and - a rest containing especially impurities accumulated on the nets and residues of the antifouling coating, especially paraffins and EVA co-polymers; C) dissolution of the sludge in an acidic medium at temperatures ranging from 0 to 100 °C for 1 to 4 hours, wherein the acidic medium is a strong mineral acid, a mixture of strong mineral acids or a mixture of one or several strong mineral acids with H 2 O 2, where the copper compounds contained in the sludge get dissolved, wherewith a solution is obtained, wherein the concentration of copper ions Cu 2+ in the acidic medium amounts to at least 20 g/L, and a non-dissolved residual sludge; D) separation of the non-dissolved residual sludge from the solution, wherewith a solution of Cu 2+ ions in the acidic medium is obtained, said medium representing an electrolyte that is then led to an electrolytic cell; E) electrolysis of the solution of copper ions Cu 2+ in the acidic medium, obtained in step D, in the electrolytic cell, where elementary copper gets deposited on the cathode.