Multiobjective Optimization in Sewer Network Design to Improve Wastewater Quality
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 10, Issue 4
Abstract
Sewers that constitute the main part of wastewater systems can be used as pretreatment units of wastewater treatment plants. The authors aim to increase the treatment efficiency of sewers by optimization. A hydraulic model is written and validated. A quality calculation section is added to the model according to the Wastewater Aerobic/Anaerobic Transformations in Sewers (WATS) method, and it is calibrated and verified using the data of a real wastewater transition line. An optimization engine is coupled to the proposed model. The new model can simulate the hydraulic and quality parameters of a sewer network and optimize it. Six objective functions and a general one with their decision variables were assessed. A predesigned wastewater collection network was used for the optimization of five scenarios. The results can be used to identify optimization priorities at the network design stage. Results showed that an increase in the removal of organic matter within the sewer can be achieved, but its other performance indices may worsen. Prioritization of objectives according to stakeholder views is required.
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Acknowledgments
Reza Heydarzadeh wrote the first paper draft. His Ph.D. supervisor (Massoud Tabesh) in Iran provided scientific advice, and his placement supervisor (Miklas Scholz) in Sweden rewrote the article thereafter.
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Information & Authors
Information
Published In
Journal of Pipeline Systems Engineering and Practice
Volume 10 • Issue 4 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jun 15, 2018
Accepted: Apr 10, 2019
Published online: Sep 14, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 14, 2020
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