Abstract: There are provided systems and processes that provide a robust ?-alumina supported catalyst for the wet air oxidation or hydrolysis treatment of wastewaters having a pH of 9 or greater.

Abstract: Systems for treating wastewater containing organic nitrogen compounds are disclosed. The systems include a wet air oxidation unit having an oxidation zone, a catalytic zone, and a metal-based catalyst. Methods of treating wastewater containing organic nitrogen compounds are also disclosed. The methods include contacting the wastewater with an oxidant to produce a mixed liquor, contacting the mixed liquor with a metal-based catalyst to catalyze ammonia and produce a gas containing nitrogen and a liquid effluent containing nitrogen. Methods of retrofitting a wet air oxidation unit including providing a metal-based catalyst are also disclosed. Methods of facilitating treatment of wastewater in a wet air oxidation unit including providing a metal-based catalyst are also disclosed.

Abstract: There are disclosed processes and systems wet air oxidation systems and processes which provide for the combined treatment of a spent caustic with a spent material (e.g., spent carbon, spent biological material, or combinations thereof) to produce a regenerated spent material stream.

Abstract: There are provided systems and processes that provide a robust ?-alumina supported catalyst for the wet air oxidation or hydrolysis treatment of wastewaters having a pH of 9 or greater.

Abstract: There are provided systems (10) and processes for the selective removal of cyanide from a wastewater stream (12) comprising cyanide and an amount of organic compounds therein.

Abstract: The present inventors have developed systems and processes that improve sulfate removal from a fluid stream (14), such as a wet air oxidation (WAO)-treated spent caustic.

Abstract: There are provided systems and processes which enable the efficient biological treatment of high salt concentration fluid streams, e.g., spent caustics, to reduce COD concentrations in the fluid streams.

Abstract: There are disclosed systems and processes that substantially prevent scaling in the treatment of a spent carbon material in a wet air oxidation (WAO) system.

Abstract: There are provided electrooxidation systems and processes which provide an elevated pressure at which components are oxidized in an electrooxidation cell. The elevated pressure reduces power consumption for the cell at least in part by reducing the formation of gas bubbles, which typically leads to increased resistance and an increased power output.

Abstract: Catalytic systems and methods for treating process streams are disclosed. Catalytic wet oxidation and hydrolysis techniques may be used to treat one or more undesirable constituents. Methane may be produced in connection with at least some embodiments.

Abstract: There are disclosed systems and processes that substantially prevent scaling in the treatment of a spent carbon material in a wet air oxidation (WAO) system.

Abstract: There are provided systems and processes which enable the efficient biological treatment of high salt concentration fluid streams, e.g., spent caustics, to reduce COD concentrations in the fluid streams.

Abstract: Catalytic systems and methods for treating process streams are disclosed. Catalytic wet oxidation and hydrolysis techniques may be used to treat one or more undesirable constituents. Methane may be produced in connection with at least some embodiments.

Abstract: Catalytic systems and methods for treating process streams are disclosed. Catalytic wet oxidation and hydrolysis techniques may be used to treat one or more undesirable constituents such as HPAM and KHI. Methane may be produced in connection with at least some embodiments.

Abstract: There are provided electrooxidation systems and processes which provide an elevated pressure at which components are oxidized in an electrooxidation cell. The elevated pressure reduces power consumption for the cell at least in part by reducing the formation of gas bubbles, which typically leads to increased resistance and an increased power output.

Abstract: Methods and systems for applying separation processes to a spent caustic stream are disclosed. Methods and systems for regenerating media utilized in spent caustic separation processes are disclosed.

Abstract: Catalytic systems and methods for treating process streams are disclosed. Catalytic wet oxidation and hydrolysis techniques may be used to treat one or more undesirable constituents such as HPAM and KHI. Methane may be produced in connection with at least some embodiments.

Abstract: Systems and methods are provided for the treatment of caustic wastewater. Specifically, systems and methods are provided for combining refinery spent caustic and ethylene spent caustic solutions and treating the combined spent caustic mixture using a wet air oxidation process.

Abstract: The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.

Abstract: Methods and systems for applying separation processes to a spent caustic stream are disclosed. Methods and systems for regenerating media utilized in spent caustic separation processes are disclosed.