I recently upgraded my Mac from Snow Leopard to El Capitan. I had been using a utility called Compost, which automatically deletes anything that has been in the trash more than a configured amount of time (also there are lots of other options, like if the disk is more than n% full). It doesn't seem to be working any more. The preference pane still works (although it's a 32-bit pane so it requires an annoying reload of System Preferences), and I can see the process running in Activity Monitor, but files aren't getting deleted.
Unfortunately, the developer stopped maintaining it several years ago. Anyone know of something similar that works in El Cap?