In the early 1990s, a new wastewater treatment plant was built in Ujezd u Brna to provide the treatment of water from the sewer system. The clean water is then released to the river Litava. The plant underwent complete reconstruction in 2010. The main reason for the renovation was that the plant's capacity was insufficient. What is more, the treatment process did not meet the current strict environmental standards. In addition, a new visualization and control system designed to monitor the treatment process has also been installed.
The WAGO 750-841 system together with one PLC have been chosen to control the treatment process. The controller is connected to an operator's PC via Ethernet. The communication between the devices runs via the MODBUS-TCP protocol.
Clear visualization is provided by the Reliance SCADA/HMI system, which is installed on the PC located in the plant's operator room. Using several well-arranged visualization screens, Reliance allows for monitoring and controlling the whole treatment process from the plant intake through biological treatment to the sludge dewatering process. For some devices, a number of engine hours can be set up in the Reliance system. After exceeding the limit, an alarm message displaying the number of completed engine hours appears on the PC's screen. Additionally, all operational data is automatically stored in the Reliance database and can be used for future analysis.
Visualization and control of the treatment process at the wastewater treatment plant in Ujezd u Brna
1x Wago 750-841
2x Wago 750-315
6x Vacon frequency converter
1x Reliance Combi Package Desktop with 1,000 data points
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