Pneumatic bubble aeration reactor and method of using same

Details Pneumatic bubble aeration reactor and method of using same Pneumatic bubble aeration reactor and method of using same

1996-11-13

1998-05-26

Upton, Christopher

Liquid purification or separation

Processes

Including geographic feature

210137, 210170, 210194, 210220, 2102422, 261 77, C02F 700

Patent

active

057559767

ABSTRACT:
A pneumatic bubble aeration reactor and method for conditioning bodies of liquid comprising at least one upwelling bubble conduit, at least one return conduit fluidly connected to the upwelling conduit via a fluid reservoir and a secondary gas-diffuser positioned adjacent the top of the return conduit. A liquid driving diffuser introduces oxygen-rich gas bubbles into the upwelling conduit at a velocity sufficient to cause the downward flowing liquid in the return conduit to exceed the natural tendency of the secondary gas to flow upwardly. This driving action is coupled with a reactor geometry to assure a liquid velocity that exceeds the rise velocity of the bubbles, causing the bubbles to reach the exit end of the return conduit. An expansion chamber is provided at the exit end of the return conduit to present a decreasing velocity gradient to the fluid passing through the return conduit. This expansion chamber increases the gas bubble dwell time and allows for recirculation of the gas bubbles from the return conduit into the upwelling conduit. A counter-flow of gas bubbles can also be introduced into the return conduit proximate the exit end thereof. Due to prolonged exposure between the liquid and the gas bubbles within both the upwelling and return conduits, high oxygen absorption efficiency is attained.

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