Patent ID: 7445721
Filing Date: 2008-11-04
Classification: B01D,B01J,C02F

Abstract:
1. A method for treating wastewater comprising: dissolving ozone in wastewater in the presence of dissolved and suspended metal oxy-hydroxide catalysts formed from the addition of metal salt reagents to the wastewater, wherein the dissolved and suspended metal oxy-hydroxide catalysts initiate conversion of the dissolved ozone into diverse reactive oxidative byproducts able to react through multiple oxidative pathways with dissolved or suspended contaminants, the dissolved ozone and dissolved and suspended metal oxy-hydroxide catalysts being sufficient to provide excess metal oxy-hydroxide catalysts, dissolved ozone and associated reactive oxidative byproducts to a bed of moving sand; and, passing the excess metal oxy-hydroxide catalysts, dissolved ozone, associated reactive oxidative byproducts and wastewater through the bed of moving sand sufficient to continue to oxidize contaminants and to continuously form catalytic metal oxide coated sand surfaces within the bed to allow further catalytic oxidation of dissolved or suspended contaminants.