超滤膜系统在甘蔗糖精炼工艺中的应用

研究了一种能效高、环境友好的膜法生产精炼糖的方法．超滤膜的应用可以有效去除色素而对环境影响很小，对原糖溶液的脱色率为48．7％，对蜜洗糖浆为58．2％．采用超滤膜处理蜜洗糖浆可以去除大部分影响结晶的杂质，同时粘度降低17％，第一、第二、第三小时的结晶速度分别增加48．9％，38．2％和37．0％，结晶速度增加会降低蔗糖损失、提高生产能力和收率．膜法工艺的应用可以省去精炼糖脱色工序的部分环节，在投资和操作费用显著降低的同时生产出高品质的精炼糖产品以满足消费者的需求．

Application of Ultrafiltration Membrane System in Refined Cane Sugar Process

Reported here is a new sugar processing method (membrane process) providing an energy efficient and environmentally friendly process for the production of refined cane sugar. The UF (Ultra Filtration) membranes used in cane sugar process can remove color with minimal effect on environmental quality. The color removal ranges from 48.7% for raw sugar to 58.2% for affination syrup. The treatment of affination syrup using the membrane process removes impurities which affects the rate of crystallization,and improves the crystal growth rate by up to 48.9%,38.2% and 37.0% respectively for the first hour,the second hour,and the third hour. The subsequent increase in crystal growth rate will increase the plant capacity,reduce sucrose loss,and increase yield. The result shows the reduction in viscosity by 17% due to the ultra filtration treatment. Application of the membrane process in raw sugar mills in conjunction with a sugar refinery can eliminate one or more of the various refining processes,such as affination,carbonation,phosphatation,and/or granular carbon/bone char/ion exchange for decolorization. In summary,the membrane process can produce high quality food grade sugar products meeting customers' needs with a considerable reduction of both capital and operating costs.