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Modélisation détaillée du fonctionnement de la future filière complète de biofiltration de la station de traitement des eaux usées Seine Aval

Abstract : In 2013, SIAAP (the interdepartmental association for sewage disposal for the Paris conurbation) launched a program to upgrade the Seine Aval (SAV) plant, the largest wastewater treatment plant in Europe. This upgrade program, which is scheduled to be finalized in 2022, aims to adapt the plant to the urbanization of the Paris region and to regulatory requirements. After the upgrade, the wastewater treatment will be realized by two parallel treatment lines: (i) the biofiltration line and (ii) the membrane bioreactor line (MBR). The configuration of the treatment after the upgrade of the station will be complex, which provides several local and global operation choices to realize the wastewater treatment. To evaluate the economic and environmental impacts of these operation choices and identify the best choices based on treatment needs, support tools such as models simulating the performance of treatment processes are required. This thesis presents the modelling work for the biofiltration line of the Seine Aval plant after its upgrade in 2022. The modelled line is composed of a primary settling process, three stages of biofiltration and a tertiary clarification process. Considering the progress of the upgrade program, a modelling strategy for the biofiltration line is first proposed. This strategy defines the order of modelling for the treatment steps of the biofiltration line and the control rules to be integrated in the biofiltration line model. Then, the SimBio model and SimDec model, which respectively simulate the treatment performance of biofiltration and physico-chemical settling process, are modified and improved in order to build process models for each treatment step of the biofiltration line. The process models are calibrated and validated with data from the plants of SIAAP. After calibration and validation, the models are connected in order to build the model for the biofiltration line. Control rules and evaluations of treatment costs and environmental impacts are integrated in the biofiltration line model. Finally, to evaluate the potential for using the biofiltration line model as a tool for treatment optimization, several operation scenarios are tested and analysed. According to the results obtained, in general, the performance of each treatment step modelled can be well predicted by the process models. The built biofiltration line model is able to indicate the advantages and disadvantages of the operation scenarios and help to identify the optimum operation choice. It therefore has the potential to be used as a tool to help optimize the biofiltration line of the Seine Aval plant.
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Submitted on : Thursday, September 16, 2021 - 5:55:10 PM
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Jialu Zhu. Modélisation détaillée du fonctionnement de la future filière complète de biofiltration de la station de traitement des eaux usées Seine Aval. Génie des procédés. Université de Technologie de Compiègne, 2020. Français. ⟨NNT : 2020COMP2574⟩. ⟨tel-03347031⟩

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