The flow of alternating current electrical power between electrode(s) and ground electrode(s) in contact with a working fluid is utilized in separating materials within the working fluid and to agitate the working fluid and separate contaminants within the fluid. The systems can be tubular or box-like...http://www.google.fr/patents/US4988427?utm_source=gb-gplus-shareBrevet US4988427 - Liquid/solid separation unit
