Augmented Sorting of Recovered Wood Waste Using Stain and X-Ray Technologies Recently Awarded by the FDEP Innovative Recycling Grants Program to the Town.

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Presentation transcript:

Augmented Sorting of Recovered Wood Waste Using Stain and X-Ray Technologies Recently Awarded by the FDEP Innovative Recycling Grants Program to the Town of Medley

Objectives Evaluate two innovative technologies for identifying and removing CCA-treated wood within recovered wood waste. PAN Indicator Stain X-ray Technology (hand-held units)

Tasks Phase I Sort 10 tons (minimum) of dimensional C&D waste wood using visual methods, PAN stain and XRF unit Document speed and costs. Phase II Picking Line Sorts No augmentation With stain With XRF Documentation

Project Collaborators Host Facility

Why Are New Methods Needed for Sorting?

Sorting Technologies (Previous Work) Chemical Stains Arsenic Test Kit Laser (LIBS) X-ray (XRF) Time consuming but inexpensive For a few samples Suited for on-line applications

Chemical Stains Low Capital Cost, Labor Intensive Chemical stains Chrome Azurol PAN Indicator** Rubeanic Acid Untreated Treated Stains Are Not Arsenic Specific

On-Line Technologies (Previous Work in Sarasota County) Laser Induced Breakdown Spectroscopy (LIBS) X-Ray Flourescence Spectroscopy (XRF)

DETECTORS laser x-ray

X-Ray Fluorescence Technology

Theory of X-Ray Fluorescence Incident X-ray from the analyzer strikes an electron occupying the lowest shell Electron is ejected An upper-shell electron drops down to fill the vacancy X-ray characteristic to this elements’ energy is emitted Nucleus Ejected e- Transitioned e- Incident X-Ray Emitted X-Ray

XRF Field Photos

¾”

Treated vs. Untreated Wood

Dry vs. Wet Treated Wood

Dry vs. Wet Untreated Wood

Alternative Chemicals

Distance readings

New XRF Unit Portable hand-held XRF units

Preliminary Testing at Wood Recycling Facility

Preliminary Testing

Demonstration with Innov-X Unit at End of Meeting

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