Why sterilize the juice? Have you tried not sterilizing it? Doesn't the yeast/alcohol produced & acidity take care of undesireable micro-organisms, or are you sterilizing to halt fermentation?
I sterilise because:
1) The apples are crawling with hundreds of fruit flies, etc.
2) I mainly use the juice for apple wine (+ some cider) and don't want the natural yeasts that produce a lesser amount of alcohol.
3) As I pasteurise juice for later use, and it takes me 1 hr/gall to press, I sterilise the juice so I can press enough for either a 6 gall batch to ferment right away, or have sufficient juice to warrant heating up the pasteuriser and bottling the juice.
4) I produce both cider & wine in 6 gall batches and don't want to risk losing the lot, bearing in mind that it takes me approx 1hr to press each gallon of juice + all the time spent pasteurising, freezing, then blending to get the flavour right, then all the effort in fermenting, racking, clearing, re-fermenting/disgorging (for sparkling wine/cider), etc.
4) As I also use the juice for apple wine, which will be around much, much longer than cider, I want the minimum of bugs in it. I remember buying farmhouse cider years ago that would come out the barrels clear & golden, then turn brown, then turn to vinegar.
I don't add any campden tablets to juice that I pasteurise & bottle to drink later just as an apple juice drink (although I still have the option to convert to cider/wine).