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Case Studies

Case Studies

Coping with Greater Demands

On the outskirts of this major City this Water Treatment Works deals with incoming flows of up to 15,000 l/s. Refurbishment was required to enable the works to cope with the greater demands being placed on it from the growing city.

Inlet screens were changed to both course and fine screens which meant new MCCs and control systems were required. We also replaced the RAS plant and aeration control consoles with a new Siemens S7-300 PLC system with marshalling cubicles.

As part of the site upgrade, we also networked the site PLCs and included a new SCADA system to oversee the inlet screens and add some of the existing site control systems including the high lift pumps and aeration system. PROFIBUS was selected as the best network solution, and further existing systems are to be added in the future.

Existing Rockwell ControlLogix and new Siemens S7-300 PLCs were integrated onto the new Siemens WinCC SCADA, allowing operators to monitor and control the plant from one location, rather than locally at each MCC.

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