Development of Ultrasound High Performance Membrane Processes on Waste Water Treatments

采用超声清洗技术去除超滤膜和微滤膜的污染，采用错流过滤的方法对蛋白内酯溶液进行渗透。超声频率为45 kHz，输出功率为2.73W/cm2。对聚砜、聚丙烯腈和聚偏氟乙烯三种聚合物膜分别采用超声波清洗、水清洗和超声下水清洗三种方法进行了清洗实验。结果表明，超声波水洗是恢复渗透通量的有效方法。在不同的过滤温度下，采用不同浓度的蛋白胨，考察了超声波对污染膜的清洗效果。讨论了超声波与水清洗相结合对膜污染进行清洗是一种新的有效方法。

Ultrasound cleaning technique was applied to remove fouling of ultrafiltration and microfiltration membranes, as peptone solution was permeated by cross-flow filtration. The ultrasound employed had 45 kHz frequency with 2.73 W/cm2 output power. For each polymeric membrane made of polysulfone, polyacrylonitrile and polyvinlidene fluoride, the cleaning experiments were carried out with three kinds of methods using sonication, water cleaning and water cleaning under sonication. It was found that water cleaning under sonication is effective methods for recovery of permeate flux. The ultrasound effect on cleaning of fouled membrane was also examined at different filtration temperatures using various peptone concentrations. It was discussed that the cleaning of fouled membrane by ultrasound association with water cleaning is a new effective method.