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Table of contents
Chapter 1 Bibliographical study
1.1 Background
1.1.1 Overview of emerging contaminants
1.1.2 Overview of glyphosate
1.2 Occurrence, behavior, and fate of glyphosate in aqueous environment
1.3 Treatment technology for glyphosate from environment
1.3.1 Adsorption
1.3.2 Filtration
1.3.3 Biological treatment
1.3.4 Advanced oxidation processes (AOPs)
1.4 Wet air oxidation
1.4.1 WAO for single organic compounds treatment
1.4.2 WAO for real industrial wastewater treatment
1.4.3 Reaction mechanisms
1.4.4 Reaction kinetics for WAO
1.4.5 Mass transfer for WAO
1.5 Microfluidic device
1.6 Coupled advanced oxidation technology and biological treatment to treat emerging contaminants
1.7 Conclusions
Chapter 2 Bubble characterization and gas-liquid interfacial area in two phase gas-liquid system in bubble column at low Reynolds number and high temperature and pressure
2.1 Introduction
2.2 Experimental methods
2.2.1 Experimental setup
2.2.2 Data analysis
2.3 Results and discussion
2.3.1 Effect of superficial gas velocity
2.3.2 Effect of superficial liquid velocity
2.3.3 Effect of pressure
2.3.4 Effect of temperature
2.3.5 Effect of different liquid and gas phase
2.3.6 The correlation for average bubble size and gas holdup
2.4 Conclusion
Chapter 3 Kinetic study of glyphosate degradation by a wet air oxidation process
3.1 Introduction
3.2 Materials and methods
3.2.1 Chemicals
3.2.2 Experimental procedure
3.2.3 Analytical methods
3.3 Results and discussion
3.3.1 Glyphosate degradation
3.3.2 Kinetic modeling
3.3.3 Formation of byproducts
3.3.4 Proposed degradation pathway
3.4 Conclusions
Chapter 4 Oxidation of glyphosate by wet air oxidation using a microfluidic device
4.1 Introduction
4.2 Materials and methods
4.2.1 Chemicals
4.2.2 Microreactor fabrication
4.2.3 Evaluation of glyphosate degradation
4.2.4 Analytical methods
4.3 Results and discussion
4.3.1 Glyphosate degradation
4.3.2 TOC and COD reduction
4.3.3 The formation of byproducts
4.3.4 Modelling
4.4 Conclusions
Chapter 5 Acclimation of aerobic activated sludge to glyphosate biodegradation: experimental study and kinetics modelling
5.1 Introduction
5.2 Materials and methods
5.2.1 Chemicals
5.2.2 Acclimation process of activated sludge
5.2.3 Compared experiments between acclimated and non-acclimated sludge
5.2.4 Analytical methods
5.3 Results and discussion
5.3.1 Bacteria activity validation during acclimation process
5.3.2 Removal efficiency of glyphosate and TOC during acclimation process
5.3.3 Validation of the acclimation performances compared to fresh activated sludge
5.3.4 Kinetics of glyphosate biodegradation
5.4 Conclusion
Chapter 6 The removal of glyphosate from wastewater by a compact process combining wet air oxidation and biological treatment
6.1 Introduction
6.2 Materials and methods
6.2.1 Materials
6.2.2 Experimental set-up for WAO process
6.2.3 Experimental set-up for biological treatment process
6.2.4 Analytical procedures
6.3 Results and discussion
6.3.1 WAO pretreatment
6.3.2 Biological process
6.3.3 Combination of WAO and biological process
6.3.4 Identification and quantification of by-products
6.3.5 The degradation pathway of glyphosate
6.4 Conclusions
Chapter 7 Conclusions and Perspectives
7.1 Conclusions
7.2 Perspectives
References
