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US 6,645,450 B2Granted
Method and apparatus for use of reacted hydrogen peroxide compounds in industrial process waters
AssigneeSteen Research, LLC
InventorsMichael J. Stoltz, Stephen R. Temple
Life of this patent
Estimating the term…
Abstract
Methods and apparatus are described which utilize an aqueous hydrogen peroxide composition of hydrogen peroxide and at least one additive which serves to catalyze the rapid decomposition of the hydrogen peroxide into hydroxyl radicals. When contacted with an atmospheric effluent containing odor and/or noxious components, the hydroxyl radicals formed oxidize the odor and noxious components to non-odor offensive, environmentally acceptable by-product.
Claims57
A method for removing at least one of an odor component and a noxious component from an atmospheric effluent, the method comprising:
- combining a solution comprising a predetermined concentration of hydrogen peroxide and a solution comprising a predetermined concentration of ferrous sulfate at a feed ratio within a range of about 1:1 to about 100:1, wherein said feed ratio is defined by weight and based on a 50% by weight hydrogen peroxide solution and a 38% by weight ferrous sulfate solution, to form an aqueous hydrogen peroxide composition;
- contacting an atmospheric effluent containing at least one of an odor component and a noxious component with said aqueous hydrogen peroxide composition, wherein said ferrous sulfate is at a sufficient concentration to catalyze the decomposition of said hydrogen peroxide to predominantly produce hydroxyl free radicals;
- and
- oxidizing at least one of said odor component and said noxious component in said atmospheric effluent to a substantially non-odor-offensive, environmentally acceptable by-product, said oxidation producing a liquid effluent containing at least said by-product and said aqueous hydrogen peroxide composition, and an exhaust effluent having reduced amounts of at least said odor component and said noxious component.
1 more element
A method for removing at least one of an odor component and a noxious component from an atmospheric effluent, the method comprising:
- combining a solution comprising a predetermined concentration of hydrogen peroxide and a solution comprising a predetermined concentration of ferrous sulfate at a feed ratio within a range of about 1:1 to about 100:1, wherein said feed ratio is defined by weight and based on a 50% by weight hydrogen peroxide solution and a 38% by weight ferrous sulfate solution, to form an aqueous hydrogen peroxide composition;
- contacting an atmospheric effluent containing at least one of an odor component and a noxious component with said aqueous hydrogen peroxide composition;
- and
- oxidizing at least one of said odor component and said noxious component in said atmospheric effluent to a substantially non-odor offensive, environmentally acceptable by-product, said oxidation producing a liquid effluent containing at least said by-product and said aqueous hydrogen peroxide composition, and a gaseous exhaust effluent having reduced amounts of at least said odor component and said noxious component.
1 more element
A method for removing an odorous component from an effluent gas stream in a rendering process, comprising:
- providing an effluent gas stream from a rendering process, wherein said effluent gas stream comprises at least one component that produces an odor in said effluent gas stream and that is at a concentration in said effluent gas stream;
- feeding a solution comprising hydrogen peroxide to a sidestream effluent upstream of a pump that recirculates the sidestream effluent from a reservoir;
- feeding an additive that catalyzes a decomposition of said hydrogen peroxide to hydroxyl free radicals to said sidestream effluent downstream of said pump, thereby forming an aqueous solution comprising said hydrogen peroxide and said additive;
- feeding said aqueous solution to a scrubber;
- contacting said effluent gas stream with an said-aqueous solution in the scrubber;
- absorbing said at least one component from said effluent gas stream into said aqueous solution, thereby reducing said concentration of said at least one component in said effluent gas stream and reducing said odor in said effluent gas stream;
- oxidizing said at least one component in said aqueous solution;
- and
- collecting said aqueous solution from the scrubber in the reservoir.
6 more elements
A method for reducing the concentration of an odorous component from an effluent gas stream, comprising:
- providing an effluent gas stream, wherein said effluent gas stream comprises at least one odorous component selected from the group consisting of organic sulfides, thiols, amines, alcohols, inorganic sulfides, simple carboxylic acids and combinations thereof that is at a concentration in said effluent gas stream;
- feeding a solution comprising hydrogen peroxide to a sidestream effluent upstream of a pump that recirculates the sidestream effluent from a reservoir:
- feeding an additive that catalyzes a decomposition of said hydrogen peroxide to hydroxyl free radicals to said sidestream effluent downstream of said pump, thereby forming an aqueous solution comprising said hydrogen peroxide and said additive:
- feeding said aqueous solution to a scrubber:
- contacting said effluent gas stream with said-aqueous solution in the scrubber;
- absorbing said at least one component from said effluent gas stream into said aqueous solution, thereby reducing said concentration of said at least one component in said effluent gas stream and reducing said odor in said effluent gas stream;
- oxidizing said at least one component in said aqueous solution;
- and
- collecting said aqueous solution from the scrubber in the reservoir.
6 more elements
Dependencies are inferred from the claim text.