Oral Presentation for Green Chemistry Conference- Le Coustumer
Le Coustumer
Université de Bordeaux, France
Title : Industrial by-product valorization paradigm, Low value-high volume/high value-low volume?


Abstract: While industrials generate by-product, public consider them as waste, inducing some issues.  Paradigm consist to consider these "waste" like a new source for the industrials, public of their potential economic . Most often, recycling consists in buried or the incineration. Economic model is not really well defined. By taking onto account the potential of wastes by asking what material is, for which application, how to combine cost and benefit (for all interested parties) with the highest exigencies for the environment, it is possible to create valuable for all the actors. Our strategy is based on a specific approach called dual potential applications. It means that the double face of a coin has to be considered. We push the limits by combining Low Volume-High Value with High Volume-Low Value. Thus in the 90’ years, we experimented our approach by producing from ultimate industrial waste, new kind of materials with applications in civil engineering, agriculture, automotive, environment and may be more. Our dual matrix can be declined as friction material or as fertilizer for the agriculture with high potential for remediation of contaminated soils and waters.  Thus metallurgical by-products revealed great valorisation potential. Elaboration of friction materials is based on the same process used in this industry and exhibiting properties comparable to high tech ones. Dual matrix with potential as fertilizer and remediation one for contaminated solid by trace metals have been tested at short and long term. Data obtained confirmed the capacity of dual matrix for plant growth and attenuation of the trace metals. Solutions based on multi approaches which decline from the same source of materials different applications is a warranty of flexible solution presenting a better valorisation potential (by product or waste). In our example, we have been able to create opportunity of low volume- high valuable friction material! In the same time, a dual matrix for high volume-lower value application. By considering the benefit impact onto the environment, dual matrix can be a solution for sustainable development... Our expertise is open for collaboration and cooperation!


Dr. – HDR Philippe Le Coustumer studied geology at Montpellier University, then graduate in Composites Engineering, Bordeaux University 1986. Doctor in “Physic-Chemistry of Materials”, Pau university, 1991. He was nominated associated professor at Poitiers University (1993), tehn in 2000 at Bordeaux where he got his HDR, 2003. He was vice deputy of the G&E lab (INPB – University Bordeaux Montaigne) between 2010-2015. Member of the Glass society, AFNOR-ISO (surface microbeam analysis), consultant for Horiba group from 2008, expert for the EU (Biowaste management) in 2016; he published 108 indexed papers, 18 ISO norms and deposited 5 patents on green materials.