Vernon;
Yes, you can salvage unused dough by mixing it back into fresh, new dough. The rule is to not add more than 15% old dough into the new dough. This amounts to about 12-pounds of old dough going into a new batch of dough based on 50# of flour weight. At this level there is little or no impact of the old dough on the new dough. You can experiment with adding more of the old dough to see if the impact is within your range of acceptability. However, if the dough is correctly formulated and managed, you SHOULD be able to get three days refrigerated life from the dough. The most common causes for shorter than normal refrigerated shelf life are as follows:
Excessive yeast level
Dough temperature too high
Allowing dough to stand at room temperature prior to putting it in the cooler (dough management)
Failure to cross stack the dough boxes in the cooler (dough management)
Making the dough at the wrong time of the day (dough management)
Placing the dough boxes too close to the door in the cooler.
With three days of refrigerated shelf life you make the dough on day 1, use it on day 2 (24-hours), try to finish it by day 3 (48-hours) and finish off anything not used on day 4 (72-hours). If you are consistently using a lot of dough in that day 4 time slot you really need to rething about how much dough you’re making, do keep in mind though, any dough not used on day 4 is a candidate for addition back into fresh, new dough.
Tom Lehmann/The Dough Doctor