I never understood why we don't pump and incinerate all non-recyclable waste straight into a volcano and let the lava deal with it!

It could work with unmaned aerial blimps or other load bearing uav's.

You would sort the waste and grind it down if necessary.

They could hover high enough to not be affected by the rupture of the lava lakes. Unless there is an open caldera like in Nicaragua.

Then you would just have to deal with the local communities spiritual beliefs, which would benefit from a financial incentive.