Gas and liquid contact apparatus – Fluid distribution – Pumping
Patent
1995-08-24
1997-10-07
Miles, Tim R.
Gas and liquid contact apparatus
Fluid distribution
Pumping
2611221, 261 87, 261 93, 261120, 261DIG75, B01F 304
Patent
active
056744331
ABSTRACT:
An aeration device disperses microbubbles into a liquid and maintains efficient transfer of gas to the liquid. The aeration device uses a number of sealed end, hollow fiber membranes that are hydrophobic and provided with pores in the walls of the tubular fibers that range from about 0.01 to 1.0 microns, so that very small bubbles are formed on the outside surface of the hollow fiber membranes. Gas pressures above the bubble point of the fiber membranes are used, and a cloud of microbubbles is expelled into the liquid as it is forced to flow past the fibers. These microbubbles provide a large surface area for the effective dissolution of gases into the liquid. The length of the hollow fiber membranes is controlled in order to obtain efficient small bubble formation.
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"Untersuchung der Blasenbildung und des Stoffaustausches unter dem Einflu.beta. oberflachenaktiver Substanzen und geloster Gase" (English translation of Chapter 5.1 and Figures 89, 90 and 91 as shown in the German text pp. 134, 136, 137 and 138) by Franz Bischof, Feb. 10, 1994.
"High Oxygen Transfer Rate in a New Aeration System Using Hollow Fiber Membrane", by Hiroshi Matsuoka et al. Biotechnology and Bioengineering, vol. 40, pp. 346-352 (1992).
Bonnette Michael J.
Gantzer Charles J.
Semmens Michael J.
Miles Tim R.
Regents of the University of Minnesota
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