It's interesting that discussions about composting so often focus on a single "ingredient." After decades of composting, I no longer have an interest in moving organic matter (OM) more than once. The couple of big piles I've gone to the trouble to make here just turn into ant farms and the ants just eat everything. Not worth doing at all. As OM becomes available, it gets put in the garden somewhere and that is the end of it. Almost always on the surface, but sometimes buried. Sometimes I'll end up with a whole 5-gallon bucket of stuff from cleaning out the 'frige & trimming a bunch of plants. When that happens, I turn the bucket upside-down somewhere and ignore it for a couple of months, usually until I need the bucket for a big load again.
I never think about the individual components/ingredients after I've scattered them somewhere. To compost such minute particles as coffee grounds would yield what - mud? I think it would need to be in some type of container or it would just be lost in the soil under an open ground pile. But I would love to somehow have enough coffee grounds to notice any "effects" of them in particular sometime.
