International Sugar Journal

Ion-exchange softening of clarified juice – results of pilot trials* [Full subscriber]

Abstract The presence of calcium ions in cane juices is the main reason for scaling of the heat exchange surfaces in raw sugar mills. The necessity to periodically clean heat exchangers, evaporators and vacuum pans results in either significant downtime or redundancy of the heating and evaporation equipment. In some cane mills up to 20-25 % of evaporators are continuously cleaned to maintain the required throughput. Gradual scaling also reduces efficiency of heat transfer and reduces potential for cogeneration. Removal of calcium by ion-exchange resins has been considered in the past but has not been implemented commercially. The possibility of…

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