I'm not really worried about a damp, finely ground, organic substance like coffee beans being sent to landfills. This is actually a good thing, as it catalyzes bacteria, mold, fungi, and yeasts to initiate decomposition.
...which releases methane (CH4) into the atmosphere since it is in an anaerobic atmosphere. And then the cycle is no longer the neutral CO2 -> coffee bean -> CO2 but it added CH4 to the atmosphere which heats the planet.
Ideally all bio waste is industrially composted and the generated CH4 used to generate electricity and heat, but sequestering it is also okay.
I'm not really worried about a damp, finely ground, organic substance like coffee beans being sent to landfills. This is actually a good thing, as it catalyzes bacteria, mold, fungi, and yeasts to initiate decomposition.