1Graduate School of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido 041-8611, 2Kankyo Souken Co., Ltd, Hakodate, Hokkaido 040-0052, Japan
Essential parameters for the system design and optimum operation control of our system for removing cadmium from squid viscera by means of the competitive adsorption method were determined. The overall heat transfer coefficient of the squid viscera dissolution (auto-degradation) process was determined by Newton's heat transfer equation using the data obtained from laboratory-scale experiments. The temperature rising behavior of squid viscera closely followed Newton's equation. The results calculated from Newton's equation with the determined overall heat transfer coefficient matched the temperature rising behavior of squid viscera in a 1000-fold larger pilot scale squid viscera dissolution tank. The filter medium resistance and the specific cake resistance of solid matter in dissolved squid viscera were determined by Ruth's filtration equation. The filtration behavior of dissolved squid viscera closely followed Ruth's equation, and the filter medium resistance and the specific cake resistance could be obtained.