However, for these two recovery paths, quality requirements increase. Considering SRF production, the demand involves the diminution of global quantity of fraction designed for energetic recovery. Aiming at increase quality of products coming from solid waste treatment, ISWM plants tend to produce a significant volume of mixtures which are complex to separate and so, to recover. Their production has an economic and environmental impact since they are designed for ISDI (landfill as inert material).