Every day, Berliner Wasserbetriebe supplies almost four million people with fresh water and removes and treats wastewater. The company supplies 585,000 m³ of drinking water to households, industrial plants, and businesses every day. And with the aid of 150 pump stations, a 9,500 km sewer network transports 600,000 m³ of wastewater every day to six wastewater treatment plants for purification so that it can be returned to the cycle of nature.
For more than 20 years, the sewage treatment plants were successfully automated with the Teleperm M system from Siemens. Then, over a period of seven years, a major project migrated the 104 Teleperm M automation systems to the latest Simatic PCS 7 process control system. The aim of this project was to modernize the technical foundation of the process control technology so that all the plants would run on a uniform, largely standardized platform. The company wanted the technological content of the old software to continue being used, in an automated manner and preferably without reprogramming. The existing control and monitoring system also needed to be compatible. Special emphasis was placed on ensuring that the ongoing operation of the wastewater treatment plants would be disrupted as little as possible during the migration and that under no circumstances would the automated operation be interrupted for more than eight hours.
The project requirements specified in the call for tenders in 2006 were therefore demanding. Berliner Wasserbetriebe carefully examined all tenders. In the end, Siemens was awarded the commission for the migration in 2007.