Success stories

Serzedelo WWTP (Portugal)

Where holistic process approach matters: optimizing 2 sites in one (FBDA and aerators)

Serzedelo WWTP (Portugal)

Plant characteristics

  • Design flow: 40.697 m3/d (271.313 P.E.)
  • Biological treatment:
    • 4 plug-flow units (Serzedelo I)
    • 2 carrousel units (Serzedelo II)
  • Aeration system:
    • Plug-flow line: 6 turbines per reactor (25 kW/Unit)
    • Carrousel line: 3 radial blowers (400 kW/Unit)
  • Effluent discharge consent:
    • TN < 15 mgN/L
    • TSS < 35 mg/L
    • COD < 125 mgO2/L
    • BOD5 < 35 mgO2/L
    • TP < 10 mgP/L

Challenge

  • To reduce the aeration costs whilst ensuring the effluent quality.

CREApro® platform fitted with self-customized process intelligence tools and editable control configuration settings : an every day operation control as well as a strategic tool.

Solution implemented

  • Intelligent control loops included and tailored: N-control module , including:

    Dynamic DO setpoint strategy
    Nitrification/denitrification cycles in the aeration tanks (hybrid strategy),
    Energy consumption daily profile optimisation for further monetary savings
    Turbines direct control (nb. equipment on and rotations)
    Blowers direct control (nb. equipment on and frequency)

KPIs

100%

Effluent quality compliance

26%

Aeration energy savings

13%

Total plant energy savings

100%

Robustness and reliability

Feedback from the user

“The platform has been installed in 5 plants within the project, and the investment cost has been 0,00€ for us . The project has been financed, and savings sharing has allowed direct benefits. Each solution is fully customized to each facility, which has produced savings from day one. As soon as the project finishes, 100% of the savings will be for us!”

Claudio Costa, General Manager, TRATAVE

Brembate WWTP (Italy)