Siemens Industry Automation Division is providing another
Zimpro wet air oxidation (WAO) system to treat wastewater at
Sinopec Yangzi Petrochemical Co., Ltd.'s facility,
near the Yangzi River in Jiangsu Province, People's Republic of
China. The most recent of seven Zimpro WAO systems installed at
Sinopec facilities will be used to treat
sulfidic spent caustic wastewater streams.
The Yangzi system will treat approximately 4
m3/hr (17.6 gpm) of wastewater. The system is
anticipated to be operational by the end of 2012.
The WAO 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. It will generate a biodegradable
effluent that can be discharged to conventional biological
The Yangzi facility includes both a refinery and a petrochemical plant where fuels and
ethylene are produced. This Sinopec project marks the ninth Zimpro WAO
system installed by Siemens Water Technologies in China for
spent caustic treatment.
Sinopec Yangzi Petrochemical Co. Ltd. is a
wholly-owned subsidiary under China Petroleum & Chemical