then again, you can peel the orange (leave the good white pith)
cut it up, blend it, and strain it through a silk scarf (white)
and,
as for 'how much to expect' -- expect as much as the orange will give.
:-)
or- expect nothing!
seriously. There's no need to complicate things. The benefit of blending/straining might be the ease of it, and the extra nutrients of the white pith- forgotten what it's called...