Pine-sol is supposedly safe for household drain disposal - their literature even says its Okay for septic. I'd flush with lots of water.
If the oil/grease can be separated, I would and dispose of the sludge separately probably as solid waste, but otherwise, I'd just flush it down the drain. After all, it is a general-purpose household cleaner used to cut through grease/grime and hold the oils in suspension. You flush small amounts of grease down the drain every time you wash your dishes.
I doubt any household recycling program would be interested in the stuff. The places that sell oil are not going to want it either.