Nicolas DietrichChemical Engineering

2017: Local hydrodynamic investigation by PIV and CFD within a Dynamic filtration unit under laminar flow

Xiaomin Xie, Claude Le Men, Nicolas Dietrich, PhilippeSchmitz, LucFillaudeau https://doi.org/10.1016/j.seppur.2017.04.009 Separation and Purification Technology Abstract To better understand the hydrodynamics in a Dynamic Filtration module (DF), a local investigation within a complex and confined module named Rotating and Vibrating Filtration (RVF) was scrutinized under laminar flow with viscous Newtonian fluid (Remixing = 45). RVF consists of two […]

Nicolas DietrichChemical Engineering

2017: Local investigations on the gas-liquid mass transfer around Taylor bubbles flowing in a meandering millimetric square channel

Abstract : Gas-liquid mass transfer around Taylor bubbles moving in a meandering millimetric square channel was locally visualized and characterized in the present study. For that, the colorimetric technique proposed by Dietrich et al. (2013) was implemented. With this technique, the evolution of equivalent oxygen concentration fields in the liquid slugs passing through one and […]

Nicolas DietrichChemical Engineering

2017 : Study of the initial glycerol concentration effects upon bacterial cells adaptation and biodegradation kinetics on a submerged aerated fixed bed reactor using biocell® packing

Abstract: The present work provides an experimental study of the effect of the glycerol concentration on removal performances in a Submerged Aerobic Fixed-Film (SAF) Reactor performing in batch mode. This study consisted in adding various initial substrate concentrations of synthetic solutions (glycerol) in order to assess their effects on biodegradation kinetics and then on bacterial […]

Nicolas DietrichChemical Engineering

2017 : Absorption of toluene by vegetable oil–water emulsion in scrubbing tower: Experiments and modeling

  Abstract The aim of this work is to study continuous counter-current absorption of Volatile Organic Compounds (VOCs) by an oil–water emulsion. This process enables the treatment of hydrophilic and hydrophobic VOC within a gaseous effluent emitted by chemical or food processing industries. Toluene was chosen as the pollutant in this work because of its […]

Nicolas DietrichChemical Engineering

2016 : Process-Oriented Review of Bacterial Quorum Quenching for Membrane Biofouling Mitigation in Membrane Bioreactors (MBRs)

  Abstract Quorum Quenching (QQ) has been developed over the last few years to overcome practical issues related to membrane biofouling, which is currently the major difficulty thwarting the extensive development of membrane bioreactors (MBRs). QQ is the disruption of Quorum Sensing (QS), cell-to-cell communication enabling the bacteria to harmonize their behavior. The production of […]

Nicolas DietrichChemical Engineering

2016 : Optical Methods to Investigate the Enhancement Factor of an 2 Oxygen-Sensitive Colorimetric Reaction Using Microreactors

Visualization of mass transfer is a powerful tool to improve understanding of local phenomenon. The use of an oxygen-sensitive dye (colorimetric technique) (Dietrich et al., Chem Eng Sci. 2013; 100:172–182) has showed its relevancy for locally visualizing and characterizing gas–liquid mass transfer at different scales (Kherbeche et al., Chem Eng Sci. 2013; 100: 515–528; Yang et al., […]