Behavior of micro-particles in monolith ceramic membrane filtration with pre-coagulation.
Behavior of micro-particles in monolith ceramic membrane filtration with pre-coagulation.
复制标题
预混凝陶瓷膜过滤中微粒的行为。
DOI：
10.2166/wst.2004.0729
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Y. Watanabe
中科院分区：
文献类型：
--
作者：
H. Yonekawa;Y. Tomita;Y. Watanabe
本文旨在阐明独特的整体陶瓷膜与预凝聚通过参考的微观粒子的行为的特点。流动分析和实验已经证明，整体陶瓷膜在元件内的通道中显示出独特的流动模式，在死端过滤期间在通道中引起极其快速的絮凝。据推测，由于絮凝，浓缩在膜表面附近的电荷中和的微粒尺寸增大，结果，粗微粒被剪切力带走流出。由于所有通道中的流动死端点都位于过滤性能较高的通道末端附近，因此大多数絮凝的粗颗粒在死端点处集中形成柱状滤饼。因此，在膜上形成的滤饼层而不是在死端点周围被减轻。在通道内的死端点处的颗粒絮凝和滤饼形成的这种行为是整体陶瓷膜的独特特征。这就是为什么在日本运行的所有整体陶瓷膜水净化系统都没有用于絮凝和沉淀的预处理设备。
This paper is intended to clarify the characteristics unique to monolith ceramic membranes with pre-coagulation by referring to the behavior of micro-particles. Flow analysis and experiments have proved that monolith ceramic membranes show a unique flow pattern in the channels within the element, causing extremely rapid flocculation in the channel during dead-end filtration. It was assumed that charge-neutralized micro-particles concentrated near the membrane surface grow in size due to flocculation, and as a result, coarse micro-particles were taken up by the shearing force to flow out. As the dead end points of flow in all the channels are located near the end of the channels with higher filterability, most of the flocculated coarse particles are formed to a columnar cake intensively at the dead end point. Therefore cake layer forming on the membrane other than around the dead end point is alleviated. This behavior of particle flocculation and cake formation at the dead end point within the channels are unique characteristics of monolith ceramic membranes. This is why all monolith ceramic membrane water purification systems operating in Japan do not have pretreatment equipment for flocculation and sedimentation.