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Takreer selects Zimpro wet air oxidation system by Siemens for refinery spent caustic treatment

Siemens Industry Automation Division is providing Takreer (Abu Dhabi Oil Refining Co.) with a Zimpro wet air oxidation (WAO) system to treat refinery spent caustic as part of the company's expansion of its refinery in Ruwais, Abu Dhabi, UAE.

One of the advanced technologies that will help TAKREER meet environmental regulations, the WAO system will treat odorous sulfides and produce biodegradable effluent for discharge to the facility's effluent treatment plant. The expansion project is scheduled to be complete by late 2013.

The refinery expansion project will increase crude oil refining capacity by 417,000 barrels per day using the latest advanced technology for downstream processing units to produce higher quality products and to comply with UAE and international environmental standards. The Zimpro wet air oxidation system will be part of the new downstream units.

Wet oxidation is the oxidation of soluble or suspended components in an aqueous environment, using oxygen as the oxidizing agent. When air is used as the source of oxygen, the process is referred to as wet air oxidation (WAO). The process will oxidize odorous reduced sulfur species such as sulfides and mercaptides. WAO can pretreat difficult wastewater streams like refinery spent caustic, making them amenable for discharge to a conventional biological treatment plant for polishing.

Siemens Industry Automation Division is working closely with Siemens in Seoul, Korea and EPC firm SK Engineering & Construction Co., Ltd on the Takreer contract.

The Abu Dhabi Oil Refining Company (TAKREER) is a subsidiary of the Abu Dhabi National Oil Company (ADNOC). A leader in the UAE refining industry, Takreer has been responsible for such refining operations as the crude oil, condensate refining, and supply of petroleum products since 1999.

Zimpro is a trademark of Siemens and/or its affiliates in some countries.

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of innovative and environmentally friendly products and solutions for industrial customers. With end-to-end automation technology and industrial software, solid vertical-market expertise, and technology-based services, the Sector enhances its customers' productivity, efficiency, and flexibility. With a global workforce of more than 100,000 employees, the Industry Sector comprises the Divisions Industry Automation, Drive Technologies and Customer Services as well as the Business Unit Metals Technologies. For more information, visit

The Siemens Industry Automation Division (Nuremberg, Germany) supports the entire value chain of its industrial customers – from product design to production and services – with an unmatched combination of automation technology, industrial control technology, and industrial software. With its software solutions, the Division can shorten the time-to-market of new products by up to 50 percent. Industry Automation comprises five Business Units: Industrial Automation Systems, Control Components and Systems Engineering, Sensors and Communications, Siemens PLM Software, and Water Technologies. For more information, visit

Reference Number: IIA2012022818e

Mr. Peter Jefimiec
Industry Automation Division
Siemens AG
Gleiwitzerstr. 555
90475 Nuremberg
Tel: +49 (911) 895-7975
Contact USA
Mr. Allison Britt
Water Technologies Business Unit
Siemens Industry, Inc.
2501 N. Barrington Rd.
Hoffman Estates
IL 60192
Tel: +1 (847) 713-8477

Peter Jefimiec | Siemens Industry
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