Wastewater treatment at ethylene facility to be provided by Siemens

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WARRENDALE, PA, May 20, 2010 -- Siemens Water Technologies will provide Zimpro wet air oxidation technology to treat wastewater at PetroChina Company Limited's (PetroChina) Daqing ethylene plant projects in Heilongjiang Province, China. The system will be used to treat sulfidic spent caustic wastewater streams generated in the production of ethylene. The energy-efficient wet air oxidation systems will destroy odorous sulfide pollutants and generate a biodegradable effluent that can be discharged to conventional biological wastewater treatment. The Daqing system will treat approximately 22.7 m³/h of wastewater.

Zimpro wet air oxidation system for spent caustic treatment.
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. The system will also break down complex organic contaminants, such as phenols, to either carbon dioxide and water, or biodegradable organics.

PetroChina Company Limited is the largest oil and gas producer and distributor in China and one of the largest oil companies in the world. The company engages in a wide range of activities related to oil and natural gas, including: the exploration, development, production and marketing of crude oil and natural gas; the refining, transportation, storage and marketing of crude oil and oil products; the production and marketing of primary petrochemical products, derivative chemicals and other chemicals; the transportation of natural gas, crude oil and refined oil, and marketing of natural gas. China National Petroleum Corporation (CNPC) is the sole sponsor and controlling shareholder of PetroChina. www.petrochina.com.cn

The PetroChina project marks the eighth spent caustic WAO system installed in China by Siemens Water Technologies.

Zimpro is a trademark of Siemens Water Technologies and its affiliates in some countries.

The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility und Osram. With around 207,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2009 total sales of approximately €35 billion. http://www.siemens.com/industry

The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around 31,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.8 billion in fiscal year 2009. Further information and downloads at: http://www.siemens.com/industry-solutions

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