超滤膜去除乳酸发酵液中蛋白质的工艺研究  

Study on the Removal of Protein from Fermentation Liquid of Lactic Acid by Utrafiltration Membrane

作　　者：胡海江[1] 冯立[1] 潘丽军[1] 朱羽[1] 

机构地区：[1]合肥工业大学生物与食品工程学院,安徽230009

出　　处：《农产品加工（下）》2006年第10期126-129,共4页Farm Products Processing

基　　金：安徽省自然科学基金项目(01041302);安徽省"十五"攻关重点项目(01703003)

摘　　要：发酵液中蛋白质的脱除在乳酸生产中是至关重要的一步。比较分析了两种PS膜UEOS503和UPIS503在脱除蛋白过程中对膜通量衰减系数和脱蛋白效率的影响,考察了膜压差、温度、pH值和浓度等因素对UEOS503膜脱蛋白率、乳酸钙损失率以及膜通量的影响。研究结果表明,UEOS503膜脱蛋白效果更佳,其膜通量衰减系数相对降低28.79%,脱蛋白率相对提高46.66%;当△p=0.12MPa,温度45℃,pH值为4,浓度为40g/L时,通过UEOS503膜,蛋白质的去除率为92.85%,乳酸钙损失率为3.14%。Removal of protein from fermentation is of importance in the production of L-lactic acid. The effect of UEOS503 and UPISS03 membrane on attenuation coefficient of membrane flux and rate of removing protein were investigated, the influence of parameters such as the pressure difference, temperature, pH value and concentration on rate of removing protein, loss rate of calcium lactate and membrane flux was studied. The results showed that UEOS503 membrane was more suitable to remove protein, 28.79% decrease of membrane on attenuation coefficient of membrane flux and 46.66% increase of rate of removing protein; The better technology conditions were： △p=0.12 MPa, 45 ℃, pH=4, C=40 g/L, were achieved by UEOS503 membrane, rate of removing protein 92.85%, loss rate of calcium lactate 3.14%.

关 键 词：乳酸 膜分离 蛋白质 

分 类 号：TQ064[化学工程]