A mobile cutter would surely qualify as a niche. Hopefully very profitable. Travel to the site and cut the blades to a manageable size for transport and ultimate disposal.
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A water jet cutter mounted on the end of an excavator stick could be pretty slick.The water jet would keep dust down. I will look into that. As these blades start to fatigue, I suspect this project will become more the norm. There are countless windmills here now and they are starting to be replaced. Wouldn't be a bad niche gig if a guy can come up with a way of doing this somewhat economically. I cant tell if its 4" all the way to the end, but it absolutely is where they bolt up to the turbine. Landfill sure was not interested in getting more of these (they have had one in the past) as they have a real problem dealing with them at the landfill, hence the 16' lengths and I have to separate the ring section where they bolt to the turbine. I was hoping for a way to do this mechanically, preferably excavator mounted, but that may not be possible.
Even with slots or holes for lifting bridle, with just the sheet 1" 4x10' looking well over 1500lbs. Dropped on edge from say ten feet I do not think the glass will sustain the damage.
Repurpose them into those tiny homes. Buy them on the cheap, cut it in half, use the big end for a bunker and the flat end for an approach or an awning. Sell the whole shebang for $ 25K installed to every prepper in the country........retire wealthy to some deserted island. Problem solved!!!!
Global Fiberglass Solutions in Sweetwater, Tx uses a thin wet wire blade with water mist to cut them. Waste is collected and filtered. There are several articles about it. Looks like a clean cut.
https://renews.biz/36644/ge-recycles-ny-wind/