Forgive my ignorance, but I have a question regarding how things are done at the commercial level. Say you can consistently brew your recipes. You have a 3 bbl system with 7 bbl fermentors. Can you brew two separate batches in one day and combine the two in one fermentor? From my research I've found that three 7-bbl fermentors are cheaper than six 3-bbl fermentors. I would assume you could brew a 3 bbl batch, get it down to pitching temp, pitch enough yeast for both batches, rack to primary, brew the second batch, get it down to pitching temp, then combine with the first batch in the fermentor.
Or would you not pitch the yeast until the second batch is in the fermentor and aerate the whole thing together, then pitch the yeast?