A tank has a side wall bounded by a top and a bottom. An axis extends vertically through the tank. An inlet line for water of a first condition extends through the top with a lower end at a lower extent of the tank. An outlet line for water of a second condition has a lower end within an intermediate...http://www.google.es/patents/US8142651?utm_source=gb-gplus-sharePatente US8142651 - Mass transfer tank system
