Development of Freeze-Concentration Equipment for High-Concentration Liquor

Abstract

We have developed a new method of freeze-concentration for high-concentration liquor. The equipment consists mainly of an ice-maker, which produces mother ice on a rotating cooling drum, and a basket-type centrifuge. Experiments using sea-water (solute concentration of 1.0–3.4 wt%) yielded concentrated liquor with solute concentration of 2.2–10.2 wt% and solute recovery rates of 0.80–0.94. Partial modification of the equipment and optimization of running conditions are expected to raise the efficiency of operation.