Evaluation of Existing WWTP using GPS-X Modelling and Simulation Software

International Journal of Civil Engineering

© 2026 by SSRG - IJCE Journal

Volume 13 Issue 3

Year of Publication : 2026

Authors : Marwan Ahmed Salaheldin ElGhonimy, Mohamed N. A. Meshref, Mohamed Ibrahim, Mohamed Hussein Hegazy

10.14445/23488352/IJCE-V13I3P114

How to Cite?

Marwan Ahmed Salaheldin ElGhonimy, Mohamed N. A. Meshref, Mohamed Ibrahim, Mohamed Hussein Hegazy, "Evaluation of Existing WWTP using GPS-X Modelling and Simulation Software," SSRG International Journal of Civil Engineering, vol. 13,  no. 3, pp. 204-215, 2026. Crossref, https://doi.org/10.14445/23488352/IJCE-V13I3P114

Abstract:

Research on ways to make WasteWater Treatment Plants (WWTPs) work better is still limited. In this study, GPS-X simulation was used to predict how a WWTP behaves under different operating conditions and to suggest ideas for future improvement. GPS-X version 8.5 was applied for dynamic modelling and simulation to check the performance of the Arab Abo Saed Wastewater Treatment Plant in Helwan, Egypt. Two operating cases were studied: one with the highest water flow and the lowest pollutant levels, and another with the lowest water flow and the highest pollutant levels. Real data from two years (2022 2023) was used for calibration and validation. Sensitivity analysis was done to adjust some stoichiometric and kinetic values so that biological processes were shown correctly. The results of the simulated models were very closely matching the real existing situation in the plant, reaching 90% efficiency across all the stages of the treatment units. Regarding this approach, the GPS-X can be used efficiently to verify the WWTP design, analyse, and simulate the treatment plant behaviour under many conditions, and can help in the studies for future expansions. In addition, the modelling simulation results were very close to the existing operational performance for the plant, and also the modelling simulation was stating and identifying the options that shall improve the treatment plant performance regarding its effluent water quality and shall direct during the decision-making regarding the sustainable wastewater treatment management.

Keywords:

Wastewater treatment, GPS-X simulation, Activated Sludge Model, Dynamic modeling, WWTP design, Model calibration.

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