Great idea with the blender. I read about it in some piece about worms on the net, when I was researching for our worm farm that we started in late 2016 but completely forgot about the "scrap smoothies".
We decided for a small reclaimed bathtub solution, as we had a little more space (courtyard instead of balkony). Never blended our selves, but always cutted the stuff in nicely small bits and pieces by hand. But I will defenitely give it a try.