EYATH
The Company
Automation of facilities
Networks - Thessaloniki Wastewater Treatment Facility
 

EYATH S.A. runs and manages a series of facilities and pumping stations to treat and transport drinking water and to remove and treat wastewater in the Greater Thessaloniki Area.

Use of SCADA systems in water supply management

To ensure its water supply pumping stations and tanks operate more efficiently, EYATH has put local automation systems in place. The aim is to ensure that a human presence is not needed to operate the facilities.
At present automation systems are installed at pumping stations and tanks and at remote boreholes, and flow meters have also been installed at water supply network critical locations. Such systems have been installed at the Dendropotamos, Sindos, Ionia and Kassandrou pumping stations enabling the company to better manage water
supply.
The SCADA systems installed on the water supply network of pumping stations and tanks are listed below:

  • Sindos SCADA: This system controls the Sindos pumping station and refinery tank.
  • Dendropotamos SCADA: This system is self-contained and controls the Dendropotamos pumping station and can also control the Kallithea, Evangelistria and Kassandrou pumping stations. It has recently been reinforced with the Kalochori SCADA which has become operational and controls the Booster, Thessaloniki Industrial Area and the sedimentation tank. There is also another SCADA system which controls the Kalochori area.
  • Ionia SCADA: This system controls the Ionia pumping station, the D4 and Efkarpia tanks, and the Oreokastro Booster (automated systems between the D4 tank and Oreokastro pumping station are in place). Operations were improved when the Diavata SCADA became operational, which controls the Diavata, Evosmos, Polichni pumping stations and the Meteora Tank.
  • Evangelistria SCADA (installed at the Kassandrou pumping station): This controls the Evangelistria pumping station and the Agios Pavlos and Evangelistria tanks. Operations were improved when the Pylea old-style SCADA system became operational, which controls the Toumba, Pylea, Lykoi, Gymnasio and Analipsi pumping stations.

 

Use of PLCs in sewerage management

The sewerage network which EYATH is responsible for supervising is divided into two sections: the central sewerage network of the municipality of Thessaloniki and the tourist area network.

The sewerage network in the metropolitan area of Thessaloniki includes not just pipes but also a series of 35 pumping stations scattered around the entire Greater Thessaloniki Area. The tourist area network extends from Perea to Michaniona and consists of 11 pumping stations.

All pumping stations have automated systems that use programmable logic controllers (PLCs) and control and remote management systems. Sewerage pumping stations in the Greater Thessaloniki Area are controlled via two SCADA systems which operate at the EYATH Management Centre (‘Interni’). The centre is manned round the clock to enable EYATH to manage emergencies.

Pumping stations in the tourist areas are managed using a SCADA system which has been installed at the Aeneia Wastewater Treatment Facility in Michaniona.

Thessaloniki Wastewater Treatment Facility and the Aeneia Facility go online

The Thessaloniki Wastewater Treatment Facility manages all waste from the Greater Thessaloniki Area. Ensuring uninterrupted, continuous operation round the clock is of major importance which is why automation and control systems have been installed.

Due to the facility’s sheer scale (it occupies some 40 hectares in total) and the complexity of the chemical and biological processes that need to be monitored, the automation system is distributed across the various departments of the facility and each department is monitored and overseen by a central SCADA installed in the Control Centre.

A total of 53 PLCs have been installed to manage the facility’s various departments. These are all interconnected and also connected to the Control Centre to ensure collaboration and data exchanges. The Control Centre which enables overall control and central management of the entire system also houses a mimic diagram which shows the status of all electromechanical equipment and measuring instruments at the facility in real time in schematic format. The system can therefore take the steps needed to ensure proper operation and also take corrective actions in the case of a fault/breakdown.

Having an automated system in place is a vital condition for ensuring proper, uninterrupted operation of the facility round the clock.

The Aeneia Wastewater Treatment Facility manages wastewater from Thessaloniki’s tourist areas from Perea to Michaniona. Due to the area’s special requirements, it is vital to ensure that the Facility remains operational at all times. An automated system has been installed to ensure round-the-clock monitoring and guarantee uninterrupted operation.

The automated system consists of a series of PLCs installed at various locations around the facility and a series of measuring instruments. The aim is to ensure optimal operation of the facility and deal with any potential problems. The entire system is controlled and managed by a central SCADA system installed in the Control Centre, located in the facility’s management building.

Aided by the SCADA system the facility manager can check how the facility is operating at any time of the day and modify things, to ensure optimum output quality.