Water (EYDAP)
EYDAP is Greece’s largest water utility provider, serving 4.300.000 customers.
It operates four water treatment plants having a nominal supply from 200.000 to 600.000 m3 daily each and 3 Wastewater Treatment Plants.
The plant analysed in TRINEFLEX is the Metamorfosis WWTP.
It has been operating since 1986 and It is the only plant in the Attica Prefecture able to receive and treat septic sewage generated from areas without sewerage system. In the Metamorfosis WWTP, the wastewater undergoes comprehensive treatments, resulting in cleared water that is 90-95% free of pollutants.
The design capacity of the plant is 24.000 m3/d of septic sewage and 20.000 m3/d of municipal wastewater.
Demo Case Objectives
TRINEFLEX approach/method will be applied with the aim of:
- 1. Enhancing energy efficiency
- 2. Reducing energy costs of at least 12%
- 3. Lower emissions by more than 20%.
ACTIVITIES
Since one of the main TRINEFLEX’s objective is to optimise the energy consumption, data has been collected on the energy consumed within the WWTP to have a better insight on the plant’s environmental impact. Specifically, it has been noticed that the most energy consuming activities carried out in the WWTP are the aeration process and both the sludge and the management phases. For this reason, the TRINELEX’s approach will be applied to these activities to enhance the plant’s sustainability and to achieve the project’s objectives.
The total amount of electrical energy consumed by the WWTP is 4.634,14 MWh/year.
The aeration process consumes up to the 70% of the total used energy, so every year 3.012,19 MWh/y are consumed. Instead, the sludge treatment only consumes between 12 and 18% of the total consumption, resulting in an annual consumption of 695,12 MWh. In 2022, the biogas produced through the anaerobic digestion stage was 461.017 m3, resulting in the annual thermal energy produced by biogas around 3,331 MWh/y.
Within TRINEFLEX, the EYDAP’S demo case includes the optimisation of energy consumption aimed at reducing energy costs and the carbon footprint of the following processes:
- Aeration process (ammonia sensor installation);
- Recirculation and Excess Sludge (MLSS sensor installation);
- Sludge Digestion and Dewatering;
- Biogas management.
