Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India E-mail:
Water Sci Technol. 2021 May;83(10):2477-2485. doi: 10.2166/wst.2021.143.
This work is the first, to the best of our knowledge, to use polycaprolactone (PCL)-based membrane for the treatment of dairy wastewater. PCL is a biodegradable polymer with high biocompatibility and good oil resistance. The chlorine tolerance analysis of PCL-based membranes exhibited a good tolerance against chlorine. The PCL/TiO nanocomposite membrane with the addition of polyethylene glycol was prepared and tested for protein separation. The dependency of contact angle with time was analysed for the membrane, and the contact angle value reduced from 74.5 ± 2° to a steady value of 65 ± 2° in 120 s. The proteins were removed using a cross-flow filtration unit at an operating pressure of 0.4 MPa at room temperature with permeate flux of 10 L/m h and a relative permeate flux of about 0.10. The removal of proteins was measured qualitatively using native polyacrylamide gel electrophoresis (PAGE) and quantitatively using Lowry's test. A percentage rejection of 97.6 was obtained and the native PAGE showed the complete removal of all the major proteins present in the milk sample.
据我们所知，这项工作首次使用聚己内酯（PCL）基膜处理乳制品废水。PCL 是一种具有良好生物相容性和耐油性的可生物降解聚合物。PCL 基膜的耐氯分析显示出对氯的良好耐受性。添加聚乙二醇制备了 PCL/TiO 纳米复合材料膜，并对其进行了蛋白质分离测试。分析了膜的接触角随时间的变化情况，接触角值在 120 秒内从 74.5±2°降至稳定值 65±2°。在室温下，操作压力为 0.4 MPa，采用错流过滤装置，透过通量为 10 L/m h，相对透过通量约为 0.10，去除蛋白质。使用天然聚丙烯酰胺凝胶电泳（PAGE）进行定性测量，并使用 Lowry 法进行定量测量。获得了 97.6%的截留率，并且天然 PAGE 显示出从牛奶样品中完全去除了所有主要蛋白质。
