ANQING, China, May 27, 2011 -- Siemens Water Technologies will provide a system to treat wastewater at Sinopec Corp.’s Anqing refinery, in Anhui Province, China.
The Sinopec refinery discharges its treated wastewater into the Yangtze – the third largest river in the world and the largest in China. Preserving and maintaining this major waterway’s water quality and ecosystems is one of the Chinese government’s main environmental initiatives.
The complete wastewater treatment solution will include a powdered activated carbon treatment (PACT) system, a Zimpro wet air regeneration (WAR) hydrothermal unit, and a Hydro-Clear sand filtration system.
The three-tier system will be used to treat salty and oily wastewater from refining and petrochemical production activities, from existing and upgraded units, and will become operational in 2012.
The 1,000 m3/h Anqing system will help Sinopec discharge a cleaner effluent and also generate approximately 500 m3/h of reusable water. The refinery will reuse the water in its cooling tower system, which will help to further offset the strain on China’s surface water bodies.
Siemens' PACT system combines biological treatment and carbon adsorption into a single, synergistic treatment step to remove organics. The solids are pumped as slurry to the Zimpro WAR unit where the carbon is regenerated and biological solids are destroyed.
According to the company, as the system will generate virtually no sludge that requires landfill disposal or incineration, the WAR system will help to lower operating costs for the Anqing refinery’s wastewater treatment.