Separation, Oxidation and Hybrid Processes for Environmental Issues

 

 

Christelle GUIGUI, head of the team Separation, Oxidation and Hybrid Processes for Environmental Issues

christelle.guigui@insa-toulouse.fr - 05 61 55 97 90

From chemical engineering towards environmental engineering

"Development of new approaches in environmental engineering"

Defining the functioning features and operating conditions for the development of new processes for complex liquids transformation and valorisation. Reducing energy consumption and environmental impacts. The scientific approach is based on:

  • Separation processes (membranes, adsorption, chromatography, crystallisation)
  • Oxidation processes (oxidation and advanced oxidation)
  • Hybrid processes (membrane bioreactors, membrane distillation, adsorption/membrane, adsorption/ozonation, adsorption/biodegradation, coagulation/hydrocyclone)
  • Environmental assessment  and eco-design of processes (risk assessment, Life Cycle Assessment, etc.)

 

A multi-disciplinary /multi-skills approach

  • Physic-chemistry of complex fluids, thermodynamics, biology of multi-population systems, environmental assessment of processes.
  • Multi-scale approaches: from local scale of reactive and separation surfaces to lab scale processes, and semi-industrial pilots.
  • Modelling and eco-design of complex chain of processes

 

Scientific objectives

From the complexity of real solutions and knowledge of local phenomena to …development of investigation methods and tools…to eco-design of sustainable processes.

  • Upstream knowledge of separation and oxidation processes for understanding the specific limiting factors (e.g. fouling, competition, exclusion, etc.). For example: understanding and characterization of interactions between viruses and separation or reaction surfaces, in presence of organic matter (including micropollutants), salts and (nano) particles.
  • Development of methods and tools for insitu characterization of dynamic interactions between organic compounds, salts, microorganisms, particles, at the separation and reaction interfaces.
  • Development of models for coupled chemistry/separation/transfer
  • Analysis and optimisation of the developed processes for complex liquids (natural waters, effluents from agriculture, household or industry, biologic fluids, urines) in view of their treatment or valorisation. Environmental impacts are evaluated with dedicated modelling approaches.
  • Design and development of sustainable and integrated processes based on hybrid or coupled systems involving these processes. Minimising energy consumption and evolution towards positive energy systems.
  • Development of specific approaches and integrated tools for environmental assessment of processes and their optimization in view of a thoughtful eco-design.  .

 

Fields of application

  • Eco-industries and final users of water : potable water production, waste water treatment, reuse, water desalination, disinfection.
  • All industrial and agriculture sectors using or transforming aqueous liquids.
  • Water treatment, reuse, recycling
  • Separation, elimination, valorisation of compounds from solution, suspensions, effluents.
  • Eco-design and optimisation of potable water plants

 

Examples

 

Water

  • Reuse of household, industrial or agriculture waters, desalination of sea or industrial waters, treatment and valorisation of brines.
  • Potable water production
  • Environmental optimisation of treatment chains

 

Agriculture/breeding

Fertilizers production from urines; proteins separation from green juice.

 

Industry

Salt valorisation from brines, reuse, recycling of waters, eco-design of chain processes in water treatment industry

 

Human health

Separation of biological molecules, salts, decontamination of liquids for health application

 

All sectors

Eco-design and optimisation of processes