The latest CEIT spin off has completed a simulation study for UTEDEZA, a subsidiary of the Veolia group, that will improve the performance of the La Cartuja wastewater treatment plant in Zaragoza.

 EDAR La Cartuja

CONAQUA and UTEDEZA, a subsidiary of the Veolia group and operator of the La Cartuja municipal wastewater treatment plant (WWTP), have undertaken a project to optimize the plant’s operation. The plant serves the city of Zaragoza and several neighbouring municipalities, and has a population equivalent of 1,300,000.

The project is based on a simulation study of the WWTP that explores new operating scenarios with the goal of finding an optimal solution in terms of both operational costs and performance. Among the various scenarios, three case studies have been carried out:

  1. An analysis of the maximum capacity for the biological removal of phosphorus that considers the total volume of existing biological reactors, determines the optimal distribution of volumes of these reactors for the anaerobic and aerobic stages, and establishes the optimal guidelines for the WWTP’s operation.
  2. A dimensioning and optimization study of the new fine bubble aeration system proposed by UTEDEZA that explores the optimal operation of the air diffuser as well as the optimal air release patterns.
  3. A performance analysis of a newly installed physical-chemical treatment system based on Veolia’s Actiflo™ technology for treating return water and stormwater run-off.

To carry out the simulation studies, the CEIT-IK4 spin off ran an Operations Simulator using WEST® commercial simulation software and the Plant-Wide Model (PWM) model libraries created by CEIT. A comprehensive analysis of the WWTP optimization options was carried out through the modelling of the biological and physical-chemical processes under study and a detailed and through calibration of the models based on experimental data.

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