Siemens Energy, Inc.

Lummus Technology Inc.

Simon Larson

Chad L Felch

Bryan J Kumfer

Curtis D Cooley

William W Cunningham

Eric Martin

Philip A Burclaff

Claude E Ellis

Duane R Smith

Andrea J Larson

A process for treating a wastewater stream includes delivering a wastewater stream to an attached growth reactor to provide an amount of activated carbon and an attached growth support media having active biological material thereon within the attached growth reactor. The method also includes contacting the wastewater stream with attached growth support media and the activated carbon with the attached growth reactor to reduce an amount of biodegradable and adsorbable contaminants in the wastewater stream.

System and method for attached growth biological treatment and activated carbon treatment of a wastewater stream

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.

Wet air oxidation of a spent material with spent caustic addition

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.

Low temperature wet air oxidation

Methods of treating a high suspended solids liquor having a waste stream and a suspended solids content including powdered activated carbon and biological material by contacting the high suspended solids liquor with a membrane unit are disclosed. Methods of treating a waste stream by combining the waste stream with powdered activated carbon and biological material to produce the high suspended solids liquor and contacting the high suspended solids liquor with a membrane unit are also disclosed. Treatment systems including a membrane unit fluidly connected to a source of a high suspended solids liquor are disclosed. Treatment systems including a bioreactor fluidly connected to a source of a waste stream and a membrane unit are also disclosed.

Systems and processes for the treatment of waste streams allowing direct activated carbon and membrane contact

There are provided herein methods and systems for increasing efficiency in a multi-stage activated carbon system. The methods and systems provide a cleaned carbon solids fraction and a waste liquor from wet air regeneration, and direct the same to a second stage and a first stage, respectively, of the multi-stage activated carbon system to enhance removal efficiency therein.

Multi-stage activated carbon systems and processes with recycled streams

There is provided a system and a method for regenerating a material that reduce the incidence of scaling due to scale forming contaminants. The method may include reducing a temperature of a treated material exiting a wet air oxidation unit in a scale reducing heat exchanger prior to delivery of the treated material to a second heat exchanger which heats a source waste material comprising a scale forming contaminant therein with heat from the first treated material to form a heated waste material comprising the scale forming contaminant.

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Wausau, WI, United States of America

Simon Larson