This text is written to all chemical engineering students who are participating in courses about membrane processes and membrane technology. Membrane processes find applications in almost all kinds of industries as one or more down stream purification/separation processes: Chemical industries Pharmaceutical industries Food industries Dairy industries Wastewater treatment Etc Because of the wide spectrum of applications, knowledge about membrane processes is of great importance and each engineering student who chooses membranes as the main path of interests has a world of opportunities in coming career