Application of visible spectroscopy in waste sorting

Philippe Spiga; Antoine Bourely

doi:10.1117/12.899451

30 September 2011 Application of visible spectroscopy in waste sorting

Philippe Spiga, Antoine Bourely

Author Affiliations +

Proceedings Volume 8172, Optical Complex Systems: OCS11; 817212 (2011) https://doi.org/10.1117/12.899451
Event: SPIE Optical Systems Design, 2011, Marseille, France

Abstract

Today, waste recycling, (bottles, papers...), is a mechanical operation: the waste are crushed, fused and agglomerated in order to obtain new manufactured products (e.g. new bottles, clothes ...). The plastics recycling is the main application in the color sorting process. The colorless plastics recovered are more valuable than the colored plastics. Other emergent applications are in the paper sorting, where the main goal is to sort dyed paper from white papers. Up to now, Pellenc Selective Technologies has manufactured color sorting machines based on RGB cameras. Three dimensions (red, green and blue) are no longer sufficient to detect low quantities of dye in the considered waste. In order to increase the efficiency of the color detection, a new sorting machine, based on visible spectroscopy, has been developed. This paper presents the principles of the two approaches and their difference in terms of sorting performance, making visible spectroscopy a clear winner.

Citation Download Citation

Philippe Spiga and Antoine Bourely "Application of visible spectroscopy in waste sorting", Proc. SPIE 8172, Optical Complex Systems: OCS11, 817212 (30 September 2011); https://doi.org/10.1117/12.899451

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