From the HBD Archive
From: (Jack Schmidling)
Subject: Re-hydrating, Wyeast, Yield
Date: 1992-03-16 19:09:00 GMT

To: Homebrew Digest
Fm: Jack Schmidling

I had habitually re-hydrated yeast in a small amount of wort until I went to
my first CBS meeting where I was told to re-hydrate with plain, sterile

This seemed absurd to me because of previous experience with bread yeast but
after trying it and getting vigorous ferment within an hour, I have become a

Just to refresh my data base, I put some bread yeast in 100 ml of warm
sterile water last night and absolutely nothing happened aside from disolving
the yeast.

It seems apparent that EDME (I can't speak for any other) contains a
de-hydrated nutrent/starter in the yeast mix and bread yeast does not.

Does anyone know if I got this right and if it is true of all dyr beer yeast?

>From: R_GELINAS@UNHH.UNH.EDU (Russ Gelinas)

> If the yeast is in the outer Wyeast packet, then why not just cut it open
*wihout* ever breaking the inner seal, and just make a starter yourself?

I find it incredible that, with all the expert opinion on Wyeast, this very
fundamental question is still floating around.

Where is Jeff Frane when we need him?

>From: Gordon Baldwin <!sherpa2!gbaldwin>
>Subject: Low Yield

>I have been getting a low yield out of my grain and I expect it to be in
my sparging. The malt ingredients are :

8 lb klages
1/2 lb crystal
1/2 lb munich

>I do an infusion mash for about 45 minutes in 2.5 gallons water. The iodine
test shows full conversion. I then dump the whole mess out to my ZapPap
lauter tun. I then slowly pour in my 4 gallons 170 degree sparg water,
keeping the level of the water above the grain bed. I open the tap on
the bottom bucket all the way and the water dumps through in about 15

Don't know what a ZapPap is but my first suggestion is to use boiling water.
If you take issue with this, I will be happy to repost my study on infusion
water temp.

Secondly, it may be a momily but, most experts recommend about 15 min per gal
as opposed to the whole batch. Cut the flow rate.

>My sg after my 45 minute boil is only 1.032. This seems to be way to low
after looking at various recepies.

Not too shabby but there is room for improvement.

Your short boil time would indicate that you are not concentrating the wort
much and this is one of the objectives of boiling. You can get at least 10
gallons of wort out of 9 lbs of grain if you use 1.010 as the low end cutoff.
If you boil the ten gals down to 5 gallons, you will substantially increase
the yield.


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