Patent ID: 7931816

Claim:
A method for treating waste fluid while suppressing stripping of organics and enhancing gas-liquid ozone mass transfer rate comprising: continuously supplying ozone gas, hydrogen peroxide and an effective amount of caustic if needed to adjust the pH with a flow of waste fluid proximate to a bottom end of a substantially vertical substantially tubular reactor having a chamber with a packed bed comprising a series of surfaces; reacting the ozone, hydrogen peroxide and the effective amount of caustic co-currently with the flow of waste fluid in the reactor without substantial back mixing thereof, said co-current flow of ozone, peroxide, caustic and waste fluid being substantially non-turbulent substantially plug flow through the tubular reactor and packed bed, thereby producing an oxidized flow; maintaining a pH from about 7 to about 11 for the fluid being treated, an effective pressure, and an ozone mass transfer coefficient between about 0.01 and about 2 sec −1 which complements an effective life of the ozone; and continuously withdrawing the oxidized flow from a top end of the tubular reactor.