采用3种构型的陶瓷微滤膜元件对酵母悬浮液进行错流过滤实验,考察陶瓷膜元件的构型对于其错流过滤性能的影响.结果表明:减小陶瓷膜元件的通道直径可以提高料液在膜表面的剪切力,有助于提高过滤稳定通量和临界压力,在3 m/s膜面流速、0.1 MPa跨膜压差条件下,单管、19通道、55通道的稳定通量分别为96、128、196 L/(m2·h);在3 m/s膜面流速条件下,3种陶瓷膜元件的临界压力分别约为0.15、0.2、0.2 MPa.另外,减小通道直径还可以减小滤饼层的比阻,有利于降低过滤阻力;与提高膜面流速来增大过滤通量的方法相比,减小陶瓷膜的通道直径具有能耗较小的优点.%Crossflow microfiltration of yeast suspensions was carried out using three types of ceramic membrane with different configurations.The effects of membrane configuration on filtration performance were investigated.The results showed that reducing the diameter of the membrane channel could increase the shear stress of the feed on the membrane surface, thus increasing the steady state flux and the critical pressure.Under the conditions of 3 m/s crossflow velocity and 0.1 MPa transmembrane pressure, the steady state flux for tubular, 19 channel and 55 channel ceramic membrane elements were 96, 128 and 196 L/( m2·h), and under the condition of 3 m/s crossflow velocity, the critical pressures for these three ceramic membrane elements were about 0.15, 0.2 and 0.2 MPa, respectively.Moreover, with the reducing of the channel diameter, the specific resistance of the cake deposited on the membrane surface could be reduced.Thus, it had the characteristic of the low energy consumption.
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