DEYAL is the municipal water supply and sewerage company of the city of Larissa located in central Greece. The scope od DEYAL is to pump, transport and supply clean water to 300.000 citizens in greater Larissa urban area, treat waste water and operate irrigation networks. DEYAL exploits technology to confront everyday operating issues and improve the quality of the services provided to the consumers. In the last 15 years DEYAL has invested in automation installing Simatic PLCs, instrumentation and SCADA to monitor the operation of its wells, pumping stations, water reservoirs and networks with a total of 120 outstations. DEYAL has also updated its WWTP while also invested to modernize existing irrigation facilities which water farmlands around the city. With such projects DEYAL aimed to: 

• Integrate all the facilities to existing SCADA  
• Modernize SCADA to a unified look and feel  
• Reduce operational costs • Add functionalities to increase performance of network management  
• Define the key factors to save energy costs  
• Secure the water supply to the city and suburbs  
• Rationalize the use of water & energy for irrigation
• Exploit SCADA further as a Decision Support System

Siemens in Greece suggested a comprehensive solution ensuring the continuity and performance of SCADA, while enhancing it with extra functionalities. The scope of delivery was a complete portfolio of PLCs, software, instrumentation and drives engineered in an integrated solution. Real time data are integrated in SCADA and evaluated by SIWA Optim application to define the optimal pumping schedule for the next 24 hours. This schedule is automatically fed to SCADA while the operators monitor the availability of the whole network to avoid unpredictable incidents. The availability and the operating data of pumps, the tank filling levels, the consumers' demand, the electricity tariffs and the total water production which runs into the networks, as well as rest requirements of the company are being processed to provide the most optimum schedule to operate the pumps in terms of saving energy costs while securing the water supply to the city. Within the main pump station high energy efficient pumps using IE4 Simotics motors controlled by Sinamics P converters help DEYAL to pump water efficiently to the reservoirs.
At the WWTP of the city PCS 7 takes over the control with the support of S7 400 redundant PLCs to treat waste water pumped through 15 pump stations operated under Simatic technology. Simatic RFID cards assigned to each farmer supports DEYAL to monitor and report use of water to irrigate 3.700 acres of farmland around the city.

The facilities exist of 33 wells on the outskirts of the city, 1 main pump station, 2 booster pump stations, 7 water reservoirs which operate within an interconnected hydraulic network. There is also a WWTP 200.000 p.e. for the city and 18 pump stations for irrigation purposes.