Methods of Recovery of Fish Muscle Water-soluble Protein by Electrocoagulation

Abstract

Two methods were examined. In one method, the anolyte was first adjusted to the pH value for maximum coagulation by mixing of a part of the catholyte. The resulting coagulum was recovered. Then the mixture without the coagulum was mixed with the remainder of the catholyte; the coagulum which was produced at that time was also recovered. The anolyte was finally mixed with the catholyte in 1:1 volume ratio. The final mixture was almost neutral. The over-all coagulation was 71-81%, regardless of the concentration of protein. In the other method, the anolyte and catholyte obtained were electrolyzed again after the inversion of electrodes until the electrolytes were almost neutral. The coagulation in the method was about 35%. This coagulation is less than the coagulation obtained in mixing the anolyte directly with the catholyte in 1:1 volume ratio. The recovery seems to be due to dissolution of the coagulum in the strong alkali layer produced near the cathode.