Separation Characteristics of Dissolved Gases from Water using a Portable Separation System with Hollow Fiber Membrane Modules

If dissolved oxygen included in water is effectively used, an underwater breathing device for a human is possible. But because concentration of dissolved oxygen is low, the system with large surface area is needed. So it’s important to increase the performance of the portable system and to decrease the size of one. In this study, a portable breathing device which uses under water is presented. This system composes of a water pump, filters, hollow fiber membrane modules and a vacuum pump. Separation of dissolved gases using hollow fiber module and vacuum pump is characterized. The amounts of dissolved gases separated from water were measured. The composition of oxygen contained in separated gases was measured. Constant amounts of separated gases including oxygen were measured during 50 min. These results will be applied for the development of underwater breathing device using dissolved oxygen.