Field Tests on a Bubbleless Membrane Aerator

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by Michael J. Semmens, Univ of Minnesota, Minneapolis, United States,
Tariq Ahmed, Univ of Minnesota, Minneapolis, United States,
Michael A. Voss, Univ of Minnesota, Minneapolis, United States,

Document Type: Proceeding Paper

Part of: Air-Water Mass Transfer:

Abstract: A novel bubbleless hollow fiber membrane aerator has been developed and tested for the oxygenation of water. In this process pure oxygen is maintained on the inside of a bundle of sealed, hollow, gas permeable fibers at a pressure below the bubble point, and the water to be aerated is pumped over the outside of the fibers. Oxygen diffuses across the porous fiber walls and dissolves directly into the water without the formation of bubbles. The process provides 100% oxygen transfer efficiency at a reasonable power input. Field tests have been conducted to assess the performance of the aerator in a variety of water and wastewater treatment applications. These tests have demonstrated that the membrane can be used successfully over long periods of time without substantial loss of transfer capacity.

Subject Headings: Water treatment | Aeration | Fabrics | Membranes | Field tests | Water resources | Oxygen | Oxygen transfer |

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