Separation Characteristics of Dissolved Gases from Water Concurrently Variable Mixed with Exhalations for the Hollow Fiber Membrane
Water contains dissolved oxygen that a fish needs to breathe. It is important to increase the amounts of separation of dissolved oxygen from water for diverse applications using the separation system. In this paper, a separation system of dissolved gases from water concurrently variable mixed with the exhalations using a compressor is proposed. This system takes use of exhalations to increase the amounts of separation of dissolved oxygen from water. A compressor with variable off-time and on-time is used to control the exhalations mixed with inlet water. Exhalations contain some portion of carbon dioxide, oxygen, and nitrogen. Separation of dissolved gases containing dissolved oxygen is enhanced by using exhalations. The amounts of separation and the compositions of carbon dioxide and oxygen are measured. Higher amounts of separation can make the size of the separation device smaller, and then, application areas are diversified.
 K. Park, W. Kim and H. Y. Kim, "Optimal lamellar arrangement in fish gills," PNAS, vol. 111 no. 22, pp. 8067-8070, 2014.
 M. R. Flynn and J. W. M. Bush, "Underwater breathing-the mechanics of plastron respiration," J. Fluid Mech., pp.275-296, 2008.
 N. J. Shirtcliffe, G. McHale, M. I. Newton, C. C. Perry and F. B. Pyatt, "Plastron properties of a superhydrophobic surface," Applied Physics Letters, pp.104106-1-104106-2, 2006.
 K. Nagase, F. Kohori and K. Sakai, “Development of a compact artificial gill using concentrated hemoglobin solution as the oxygen carrier," Journal of Membrane Science, pp.281-292, 2003.
 N. Matsuda, K. Sakai, T. Nakamura and R. Majima, “Temperature-controlled enhancement of oxygen uptake from water using oxygen carrier solution,” Journal of Membrane Science, pp.17-26, 2001.
 Velianti, S. B. Park, and P. W. Heo, "The enhancement of oxygen separation from the air and water using poly(vinylidene fluoride) membrane modified with superparamagnetic particles," J. Membr. Sci., pp. 274-280, 2014.
 P. W. Heo, "Characteristics of dissolved gases separated from water mixed with exhalation gases without using a compressor," Journal of the Korean Society of Marine Engineering, vol. 40, pp. 916-921, 2016.