More dialogue on machine technology for recycling PET thermoforms

November 1, 2011

Hey yall!

Sooo I know I said I was going to post today on the SPC meeting BUT I recieved a response to yesterday’s post from Ron Sherga who is super duper well versed in PET recycling. He is currently an advisor on recycling and sustainable strategies at Heritage Environmental Services, as per his LinkedIn profile.

Check out our exchange below:

Chandler, here are the challenges in regards to your question.

Basically, there are two ways to sort on a large scale commercial level.

One is using optic sorting equipment, or more accurately, near infrared or NIR. this will not work on black . There is no fast way to discern a black colored materials composition using fast scanning technology.

The second method is to size reduce and process thru a system where materials are separated based on their specific gravity. This is done using centrifuge machinery and various fluid designs…. But let’s call it a salt water medium.

Other than these and hand sorting (which relies on eyesight and touch); that’s about it.

And my response:

Hey thanks!

I understand that the sortation technologies you describe are usually employed at the MRF/PRF facility…what I am interested in are the types of machines companies like S+S Sorting manufacture, which are often bought by the big wigs of PET recycling (Coke), and therefore more proactive in recycling PET materials into RPET flake, bottles, etc. In other words, I am trying to learn more about the privatization of PET recycling technology and why this technology is only being designed to recycle PET bottles. Does this make sense? I confuse myself sometimes!

Hmmmmm…

More details to come following my conference call with S+S Sorting!

Tomorrow’s post WILL discuss feedback from the SPC meeting, specifically, the SPC’s suggestion of “collective reporting” amongst it’s member companies.

AND, did you guys know of this conference!?! It was just brought to my attention, but looks AMAZING!

OH, and check out this Packaging Digest article— your powerhouse in stilletos is quoted, ha! I think if my head gets any bigger, it’s going to explode! But in an awesome way.

Tootles!

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