METHOD AND SYSTEM FOR ENHANCING MASS TRANSFER IN AERATION/OXYGENATION SYSTEMS

摘要

A means for obtaining high mass transfer efficiencies in surfactant laden wastewater treatment or process systems is disclosed. The present system employs ultrafine bubbles delivered into a high shear region such as in the draft tube or other containment volume of a mechanically agitated contacting system within which an impeller is placed, or in the venturi or divergent-convergent of a pumped loop within which gas-liquid contacting is carried out.

主权项

1. A wastewater treatment system for treating surfactant laden wastewater comprising:
an aeration basin; a source of oxygen; a mechanical agitating contactor disposed in the aeration basin, the mechanical agitating contactor comprising a draft tube having at least one inlet opening and at least one discharge opening and with an agitator or impeller disposed therein to create a flow of the surfactant laden wastewater by drawing the wastewater into the draft tube from the at least one inlet opening and discharging the liquid flow from the at least one discharge opening; an oxygen injection system disposed below the surface of the surfactant laden wastewater and proximate to the mechanical agitating contactor and operatively coupled to the source of oxygen, the oxygen injection system adapted to produce oxygen bubbles proximate the impeller, the oxygen bubbles having an average diameter of less than or equal to 100 microns.