Patent ID: 6365099
Filing Date: 2002-04-02
Classification: A61L,B01D

Abstract:
A process for reducing odorous contaminant concentration comprising hydrogen sulfide in a vapor space of a sewage conduit through which a flow of vapor including said hydrogen sulfide is being induced and through which liquid sewage is flowing toward a sewage treatment plant, comprising the steps of:providing a system including at least one spray nozzle connected to conduit means for conducting an alkaline-peroxide reagent comprising a first solution of base selected from a group consisting of sodium hydroxide, potassium hydroxide, ammonium hydroxide and sodium carbonate and a second solution comprising hydrogen peroxide for injection into said vapor space; placing said spray nozzle in said vapor space above a surface of said liquid flowing through said sewage conduit at a point upstream of a point of inducing said flow of vapor through said vapor space such as to provide a spray pattern extending substantially across the cross sectional area of said vapor space above said surface of said liquid; and injecting said first solution and said second solution into said vapor space through said spray nozzle in a fine spray to provide intimate contact between said solutions and said odorous contaminant to oxidize said odorous contaminant and to contact a wall of said sewage conduit delimiting said vapor space to reduce corrosion thereof.