摘要
该研究应用膜孔径为100nm的陶瓷膜错流超滤中试系统(MEMBRALOX○R,Pall)对果胶酶酶解后的鲜榨苹果原汁进行了过滤澄清与除菌效果研究。结果表明,100nm陶瓷膜错流超滤的最佳操作条件为:跨膜压力为0.85×105Pa,温度为50℃,膜面流速为5m/s;以0.5%次氯酸钠和4%NaOH溶液作为清洗剂,膜通量的恢复率可以达到98%。过滤后果汁中的悬浮颗粒和引起浊度升高的大分子胶体物质大部分被滤除,而果汁的各项质量指标如pH值、总酸、糖度等却未发生明显变化。细菌挑战试验以及贮藏试验证明了鲜榨苹果汁过滤后的无菌状态和生物学稳定性。因此,应用100nm的陶瓷膜错流超滤系统过滤鲜榨苹果汁具有很好的商业应用前景。
Raw depectinized apple juice was clarified and sterilized in a cross-flow pilot-plant-scale ultrafiltration system using ceramic tubular membranes (MEMBRALOX, Pall) with mean pore size of 100 nm. The experiment showed that the optimum operation conditions were as follows: the transmembrane pressure was 0. 85 × 105 Pa, the temperature was 50°C, and the feed flow velocity was 5 m/s. The flux recovery rate could be bept at 98% with the mixed solution of 0.5% hypochlorite sodium solution and 4% NaOH solution as the cleaning agent. Analytical results showed that: suspended solids and large molecules could be mostly removed, but pH, acidity, sugar and soluble solid content of the juices didn't change significantly. The bacteria challenge tests and the storage tests testified the asepsis state and biological stability of the filtrated fruit juice. Therefore, the cross-flow system equipped with the 100 nm ceramic ultrafiltration membrane had a great potential to the commercial prospect.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第1期136-141,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家"十五"重大科技专项(2001BA501A21)
关键词
陶瓷膜
超滤
苹果汁
澄清
除菌
ceramic membrane
ultrafiltration
apple juice
clarification
sterilization
