Crossflow filtration is a relatively new technique, which has been applied to different kinds of solute separation processes, both ultra and hyperfiltration. This book examines the most recent developments in the technique of crossflow microfiltration, which is a general method of cake-free clarification of liquids from any particular matter, especially when recovery of this matter as a cake is not required. It solves most filtration problems when the traditional dead-end filtration offers difficulties. The aim of this book is to increase knowledge in this new technique. Only the most characteristic examples of application are reported, with theories that have a practical relevance to the material presented in this volume. Readers are referred to a bibliography of titles in the same field for research and reference purposes.