I have no idea, to be honest! But, why wouldn't it be? is my first thought. I mean, the juice has preservatives, so it won't ferment. But, if the yeast is pulled out of there, and added to fresh juice, even if some preservatives are in the lees, there should be enough "dilution" with the fresh juice to overcome that.
That's just my thoughts on it- I really don't know the effect of sodium benzoate on yeast. It could work like sorbate, and inhibit reproduct of yeast, too.
One thing to do is to try just a little of the lees with a little apple juice, to see what happens before another batch of juice is wasted.