Siemens Water Solutions has successfully installed and started up a Zimpro® wet air oxidation (WAO) system at a global petrochemical company’s olefins plant in the Southern US.
The order, received in November 2017, is the second Zimpro wet air oxidation system supplied to the customer. The first system was supplied in 2004.
The WAO system will treat spent caustic generated in the production of ethylene by destroying odorous and high chemical oxygen demand (COD) pollutants. The system also generates an effluent that can be safely neutralised and sent to a biological treatment plant, where it is further treated for discharge.