Pang haoran Le 19 Mars, à 10 h 30 Salle de Thèse, insa toulouse «Etude de l’hydrodynamique, de l’élimination de la dco et de la nitrification d’un nouveau lit bactérien segmenté»

Vous êtes cordialement invités à la soutenance de la thèse de
PANG Haoran

Le 19 Mars, à 10 h 30

Salle de Thèse, INSA - Toulouse

« Etude de l’hydrodynamique, de l’élimination de la DCO et de la nitrification d’un nouveau lit bactérien segmenté »

Résumé
With the main objective of this PhD work focused on the study of the COD removal and nitrification in a new designed Multi-Section Bioreactor (MSB). Hydrodynamic characterization, biological experiments at contrasted conditions, simulations by Biowin software were carried out:

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  Firstly, it is found that static liquid retention is predominant part both without and with the presence of biofilm, biofilm acts like a “sponge” . RTD experiments showed that biofilm can promote liquid residence time, decrease the liquid film and promote the oxygen transfer consequently.
  
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  Secondly, the MSB operated at different OLRs and NLRs showed that by this MSB pilot, COD can be effectively removed (removal efficiency > 95%) and nitrification (>60%) occurred all along the filter, in the 5 sections; this implies no oxygen limitation only by the natural aeraion applied in our experimental system.
  
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  Thirdly, a TF dynamic model used in the simulator – BioWin, showed that calibrated model can help us to estimate the minimum oxygen for nitrification inside the pilot and it can well represent the competition between heterotrophic growth and nitrification.
  

Mots-Clés:

Decentralized wastewater, rural wastewater, trickling filter, multi-section bioreactor, hydrodynamic, liquid retention, liquid residence time, residence time distribution (RTD), liquid film, oxygen transfer, nitrification, heterotrophic growth, Biowin, calibration

Etablissement d’inscription : GPE, INSA - Toulouse
Composition du Jury:

Michel ROUSTAN, Professeur, Président du Jury

Alain GRASMICK, Professeur, Rapporteur

Nicollas BERNET, Professeur, Rapporteur

Hébrard GILLES, Professeur, Examinateur

Etienne PAUL, Professeur, Directeur de thèse

Valérie LETISSE, Professeur, Co- Directeur de thèse