Well, when life gives you lemons....
Seriously, though, I'm not sure. I believe its a cleanser, hence all the lemon scented cleaners on the market. Lemon juice can be used to make a variety of homemade "green" cleaners. Any citrus peel will freshen up a stinky garbage disposal. But you got me curious, so I'll look into it a little more and let you know what I find.