Siemens supplies water treatment unit for Chinese petrochemical complex

Siemens’ Industry Automation Division is supplying its Zimpro wet air oxidation (WAO) system for wastewater treatment at a refinery and petrochemical facility in Jiangsu Province, China.

The system is designed to eliminate odorous sulfide pollutants and generate a biodegradable effluent that can be discharged to conventional biological wastewater treatment.

The WAO will be installed at Sinopec’s Yangzi Petrochemical’s facility, which is located near the Yangzi River, and will treat about 4m³/hr of wastewater once operations commence later this year.

The latest of seven Zimpro WAO systems deployed at Sinopec plants will be used to treat sulfidic spent caustic wastewater streams generated in the production of petrochemicals.

Wet oxidation is the oxidation of soluble or suspended components in an aqueous environment using oxygen as the oxidising agent.

Sinopec Yangzi Petrochemical, a subsidiary under China Petroleum & Chemical Corp, is mainly engaged in refining crude oil as well as in producing and marketing hydrocarbon derivatives.

Image: Siemens’ Zimpro wet air oxidation system will be deployed at Yangzi plant to treat about 4m³/hr of wastewater. Photo: Siemens AG.