Siemens Water Solutions successfully installed and started up a Zimpro® wet air oxidation (WAO) system at a global petrochemical company’s olefins plant in the Southern U.S.
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 Zimpro® 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 neutralized and sent to a biological treatment plant, where it is further treated for discharge.
Siemens Water Solutions addresses water and wastewater needs of the oil and gas industry with a portfolio that includes physical and chemical separation, biological treatment, and complex hydrothermal technologies.
The discovery of the dynamo-electric principle has brought about greater changes to the way our society lives than practically any other scientific breakthrough. By inventing the dynamo machine, not only did Werner von Siemens help bring about the advent of electrical machinery, he was also instrumental in accelerating and facilitating industrial processes. Seen from the perspective of society, this completely changed accepted concepts of time and mobility.
In May 2014 Siemens, together with the public utilities of Mainz, Linde and the RheinMain University of Applied Sciences, has laid the foundation stone for a new type of energy storage system. Now, time has come: By pressing a symbolic button, the Chairman of the Board of Linde Group, Dr. Wolfgang Büchele, Siemens board member Professor Siegfried Russwurm, two board members of Stadtwerke Mainz AG, Detlev Höhne and Dr. Tobias Brosze, and Professor Dr. Detlev Reymann, President of RheinMain University, officially launched a hydrogen production plant at the Energiepark Mainz on July 2, 2015. With the support of the German Federal Ministry of Economics and Technology as part of the Energy Storage Funding Initiative the 17-million-project could be realized. The system, equipped with an electrolyzer from Siemens, will convert surplus electricity from wind farms to hydrogen from now on. In this way, it will be possible to store electricity from renewable sources over longer periods of time. With a peak rating of up to 6 megawatts the plant is the largest of its kind in the world.
The principle of electrolysis has been tried and tested for decades. What is special about the Mainz system is that it involves highly dynamic PEM high-pressure electrolysis which is particularly suitable for high current density and can react within milliseconds to sharp increases in power generation from wind and solar sources. In this electrolyzer a proton exchange membrane (PEM) separates the two electrodes at which oxygen and hydrogen are formed. On the front and back of the membrane are precious-metal electrodes that are connected to the positive and negative poles of the voltage source. This is where the water is split. The system in Mainz will thus have a capacity relevant for bottlenecks in the grid and small wind farms.