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Perrine Devos



"... Le jury a ainsi apprécié l'ampleur du travail réalisé, en termes de qualité et de quantité, ainsi que son caractère pluridisciplinaire, puisque son sujet (le traitement et la valorisation des retours en tête dans les stations d'épuration) a nécessité de combiner des approches de biologie, de chimie, et de modélisation, sans oublier un important volet expérimental..."




THESIS

Sidestream characteristics in water resource recovery facilities: A critical review.

Abstract

This PhD is about the treatment and the recovery of sidestreams in wastewater treatment plants. Sidestreams result from sewage sludge thickening or dewatering units and can contain high concentration of phosphorus and nitrogen. These streams need to be specifically adressed to mitigate the impacts on the main wastewater treatment line but they can also offer opportunities to recover nitrogen and phosphorus. In a context of evolution from a wastewater treatment plant to a water resource recovery facility, the objective of the PhD is to increase global knowledge on sidestream characteristics in order to assess the impact of sidestreams treatment on the overall wastewater treatment plant performance. To achieve this objective, this work uses literature data compilation and modelling tools. The PhD is organised into three main parts: 1) Characterisation of sidestreams and impacts on the performance of sidestreams processes for the treatment/recovery of nitrogen and phosphorus. 2) Calibration of an anaerobic digestion model including multiple mineral precipitation in order to optimise phosphorus recovery. 3) Scenario analysis including phosphorus recovery and nitrogen treatment in sidestreams for different wastewater treatment plant configurations (different types of phosphorus treatment and different levels of water hardness).


Keywords

Reject water, Nutrient recovery, Anaerobic digestion, Wastewater, Thermal hydrolysis process

H2O'Lyon Director of thesis

Sylvie Gillot, INRAE

Doctoral school

ED 206 Chemistry, Processes, Environmental

Laboratory

INRAE REVERSAAL

Defence date

12 September 2023

Defence language

English

Thesis jury members

  • Gillot Sylvie
  • Sperandio Mathieu
  • Flores Alsina Xavier
  • Vaneeckaute Céline
  • Buffière Pierre
  • Grau Paloma