Water Purifiers at Taormina South and Taormina North

Magnificently positioned atop a rocky plain, 200 meters in altitude, Taormina overlooks the sea and faces Etna. One of the municipal administration‘s main tasks is to maintain the entire length of the beautiful seaside coastline, eliminating any sources of pollution and thus preserving the local tourist based economy.

The problem was solved through the two water purifiers: the first called "Taormina South" is supervised from a SCADA Omron CX-Supervisor station connected over a suitable network to an Omron C200HW-CPU63 PLC, equipped with approximately 250 I/O, half digital, half analog.

The second, known as "Taormina North", is controlled from an HMI Omron NT31C station, connected over a suitable network to an Omron C200HW-CPU63 PLC, equipped with approximately 200 I/O, half digital and analog.

Synoptics

The plants have several screening and lifting stations, which separate sewage from the solid material, and subsequently moves to the dumping conveyor. The fluid, through the degritting and oil/grease removal stations, reaches the two primary sedimentation tanks, where the drying beds are oxygenated or biologically treated, through the compressed air unit, using reagents with a chlorine hypochlorite and iron chloride base. The entire process is controlled by an operator through various synoptics, which, in addition to the processes described above, also monitors the anaerobic digestion of waste and alarm management.

The local monitoring system for the purifying plant was produced by Pulvirenti Salvatore of Belpasso (CT), specializing in developing civil and industrial automation systems. By developing software to integrate Omron products, and adapt Omron products to these management processes, Taormina administration solved the immediate problem of efficiency and local control of the water purifier, building the bases for a future remote control through the use of advanced technology.