Patent ID: 6251258
Filing Date: 2001-06-26
Classification: A23J,A23K,A23L,C02F

Abstract:
A method of removing a toxic substance from waste marine products, said method comprising:an extraction step of bringing waste marine products including heavy metal as a toxic substance into contact with an acid solution including at least one of sulfuric acid and hydrochloric acid to thereby extract the heavy metal from said waste marine products into said acid solution;an electrolysis step of applying a direct current voltage between electrodes provided in said acid solution, into which said heavy metal is extracted, to thereby deposit said heavy metal in said acid solution on said electrodes; andan electrode cleaning step of reversing the polarity applied between said electrodes in a neutral or alkali electrolytic solution from the polarity in said electrolysis to thereby remove said heavy metal from said electrodes, wherein in a pretreatment before said extraction step, crude fat of said waste marine products measured using ethyl ether as a solvent is reduced to 15% or less per dried solid weight; a water content is reduced to 25% or less; and protein in said waste marine products is denatured.