Hand sorting technology

There is no shortage of examples that we could cite sorting technologies do exist, but they need to be improved and used in accordance with the particular source at hand. It is fruitless to put sensors in place to eliminate bromide plastics if we have NO polypropylene (PP) fiem waste electrical and electronic equipment (WEEE or W3E) in the sources of EOL plastics. W3E does often contain bromine, unlike other sources. 

Double resonance techniques, on the other hand, of which the earliest was ENDOR (described in Chapter 1), have greatly benefited from advances in signal processing technology, of the sort now employed, for example, in wireless communication systems. 

Considerable background information on chromatography and mass spectrometry, for the purposes discussed in this book, is provided in Chapters 3-7. As emphasized previously it is not a trivial task to sort through all the numerous combinations of available technologies (Hopfgartner 2003a) to decide on an optimum method for the purpose at hand. The present section describes some practical approaches to development of a chromatographic method that is fit for purpose. 

The pressurized hydrolysis technology is available for all TP bumpers of Toyota cars, which are painted with acrylic-melamine resin or alkyd-melamine resin. However, the recovered bumpers contain some repaired ones which are repainted with urethane paint film. The pressurized hydrolysis technology is not available for the urethane paint film because this film is not hydrolyzable with water vapor in such conditions. To maintain the high performance of the recycled material, the repaired bumper must be sorted from the recovered TP bumpers. Considering the difference of the chemical reaction of the paint films with dye agents, a paint film dyeing method was develop>ed. A nonrepaired bumper which is painted with acrylic- or alkyd-melamine resin becomes red and fluorescent color when a mixture of dye agent of Acid Red 52 and a solvent of lactic acid are applied. On the other hand, a repaired bumper... 

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