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Wastewater Treatment Siemens to Build Wastewater Treatment Facility for Chinese Refinery

| Editor: Dominik Stephan

China Petroleum & Chemical Corporation (Sinopec) has chosen Siemens Water Technologies to provide a system for wastewater treatment at its refinery in Anqing in the Anhui Province of China.

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Siemens Water Technologies will provide a three-stage wastewater treatment plant for a Sinopec refinery at Anquing, China. (Picture: Siemens)
Siemens Water Technologies will provide a three-stage wastewater treatment plant for a Sinopec refinery at Anquing, China. (Picture: Siemens)

Warrendale, Pennsylvania/USA – The waste water treatment facility will employ a powdered activated carbon treatment (PACT) system, a Zimpro wet air regeneration (WAR) hydrothermal unit, and a Hydro-Clear sand filtration system. This three stages are used to treat salty and oily wastewater from refining and petrochemical production activities at Sinopec refinery. The system will become operational in 2012 and is planned according to the recent Chinese specifications for surface discharge.

The new wastewater treatment system is expected to process up to 1000m3/h discharge, producing 500m3/h reusable water as a byproduct. This water will be reused in the cooling tower system to reduce the refinery's total water consumption.

Siemens will install its combined biological treatment/carbon absorption system PACT at Anqing. Solids are pumped as slurry to the WAR unit where the carbon is regenerated and biological solids are decomposed. This processing helps to virtually eliminate the problem of sludge that requires landfill disposal or incineration, the company says. The filter system is expected to filter large volumes of water and return it to the cooling circuit, resulting in large savings in the amount of fresh water required and thus further reducing costs.

The refinery at Anqing disposes its treated wastewater into the Yangtze – the third largest river in the world and the largest in China.The Chinese government recently focused on preserving this and maintaining this major waterway’s water quality and ecosystems. Siemens has already worked with Sinopec on seven wastewater treatment facilities in the past, helping to reduce the environmental impact of the effluent.

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