I have been toying with a mini batch and tried to water wash using a PET bottle. The rinse water seperated to the bottom but has a lot of bubbles in it. The middle layer has a type of white scum in it. And the top layer looks to be biodiesel. The percentages are
47% bio on top
6% middle layer
47% water on bottom

Anyone had an idea to what I'm looking at and if the biodiesel is okay to use?

I've just been doing the same thing and yours sounds normal.

The white scum is emulsion from a bit to much agitation i think you'll find.

Just empty the water and emulsion(scum) out and wash again (very gently for 2 or 3 washes, then with more agitation)

Eventually you'll get clear water at the bottom.

Probably a good idea if I point you to my post where tilly helped me here: http://www.biofuelsforum.com/making_...nightmare.html

Don't drain the white stuff out.

If it is emolsion then it is a mixture of biodiesel, water and soap.
Further washing will take the soap out and release the biodiesel into the top layer.

Dumping this white layer will reduce your production.