Multiple beers from one wort

[guerilla]

I'm currently going about assembling the equipment to build both a boiler and fermentation fridge. I intend to then make some beer using the BIAB method. My boiler will be of similar design to the PECO boiler with a capacity of around 33 litres.

What is the best way of going about making multiple beers? Is it possible to use a mixture of malts to create a wort and then separate into two or three batches? I know boiling the wort will sterilise it so infection shouldn't be a problem, but I'm wondering will I do anything else to harm the beer. I can only boil one wort at a time so one or more worts would be sitting for the time it takes to process the first lot.

The intention being to hop each of them differently, so that I can compare the hop flavours on their own.

Would i be better off starting from scratch both times? If so will a smaller batch be possible in my large boiler?

 

[Cwrw666]

Can't see why it wouldn't work but it would make for an extremely long brewday.

As an alternative you could mash a full size brew, then boil it with the bittering hops, then decant into as many containers you fancy and chuck in different 0 minute flavouring hops for a half hour or so, then strain into demijohns etc to cool before fermenting. Late additions of hops have the most effect on hop flavour.

 

[Oneiroi]

I’ve been toying with the idea of doing a kind of Partigyle style brew with BIAB.

Mash one high OG wort, take the bag out and then rinse/soak the grains in a second pot of water to make a much weaker wort. Kind of like a second runnings. You could then blend them a little bit to bring up the gravity of the second lot or just make 1 strong and 1 weak beer. Not sure how effective it would be but could be fun experiment

Edit:A question for someone more knowledgable than me - If you were splitting a batch pre-boil, and could only boil one bit at a time, should you do a mash-out before splitting so that the enzymes in the 2nd and 3rd batch don't keep working while you boil the 1st?


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[guerilla]

Hops at the end would allow my to achieve my goal of highlighting each hops flavour.

Is there any disadvantage to brewing smaller batches in a larger boiler? other than not having as much to drink of course.

 

[simon12]

Unless you can turn down the heat you will get alot more boil off on smaller batches.

 

[guerilla]

To correct for that would i just need to add more boiled water (say from the kettle) before putting into the fermenter?

 

[Drunkula]

If you were splitting a batch pre-boil, and could only boil one bit at a time, should you do a mash-out before splitting so that the enzymes in the 2nd and 3rd batch don't keep working while you boil the 1st?

I've been listening to Basic Brewing podcasts and they were talking to someone about it and said the enzymes do keep working in the wort and can cause a thinner beer if it's not brought up to temperature fast enough. No idea which episode as I'm going through a 12 year back catalogue picking up ones that look interesting.

 

[Zephyr259]

Yes, definitely do a mash out for exactly the reason stated, otherwise you'll make a more fermentable wort than intended.