I can't find a reference online but when Lane county decided source separation was too hard on people's little brains and implemented a centralized sorting facility (manufactured by Allison as I recall) it
blew up.
But here's a story from this year in Shanghai:
Shanghai garbage incineration plant explodes|Society|chinadaily.com.cn
I also notice the Lane Central Processing facility which
finally let the hippies do their recycling (after years of keeping them in a ghetto under the railroad tracks) is still leery of propane bottles.