Can I split batch over two days?

To cut a long story short, I can only boil around 3 gallons at once right now, as I'm in temp accommodation.

I'm looking to do a 6gal all grain BIAB, but will need to split the boil over three batches to get the final six gallons.

My plan was to do one tonight and two tomorrow - and then pitch the yeast in the carboy tomorrow.

Would that work? It possible to leave new wort in a fermentor overnight without pitching?

Thanks in advance,
HW.

 

It can work, but I and others would not encourage it.

Fresh room temp wort is a perfect medium for bacteria/yeast. If left alone you could end up with a product that your not wanting.

In your situation I would make two batches, and if you needed to combine them, do so at kegging/bottling..

If they are the same recipe, this would be a great time to branch out and try a different yeast strain on the second batch. Or try dry hopping, adding oak, or other late additions.

 

You can do this. It does slightly increase your risk of contamination, but if you are a sanitary brewer, this shouldn't worry you excesively. If you have any worries about the state of your fermenter, I recommend hitting it with bleach the day before, thoroughly rinsing it and following your regular sanitation procedure on brew day number 1.

Many brewers have to wait to pitch lagers because they can only chill with water to about 65 degrees and then they refrigerate over night before pitching so they can pitch around 50. I've never heard of this causing problems.

 

Yes it will be fine. I do it all the time ("no chill" brewing). Better idea would be do pitch yeast when batch #1 is at pitch temps.
Commercial brewers also do it- my local brews one day, puts it in fermenter [it fills only half-way], adds yeast, brews on day#2 to fill fermenter.
Fermenter space is more valuable (more money/footprint, etc.) than your mash tun, because you mash a short period of time but ferment much longer. Jamil talks about it too.

 

This is a very good idea.