60% Efficency - what is wrong?

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60% Efficency - what is wrong?

Unread postby obsahu » Thu Jan 25, 2018 4:04 pm

Hi all,

I have a 50l braumeister.

I'm using 10 kg of Simpson Maris Otter as I did previously with my BIAB method,
I'm going a mash of 66C for one hour. I have checked my gravity before boil and
it was only 1.033 with 55 liters in the kettle, which is, if counting correctly only
about 60%. What am I doing wrong? :(

Here is a picture of my crush, however, I think it is fine.

Please help :(
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Re: 60% Efficency - what is wrong?

Unread postby obsahu » Thu Jan 25, 2018 4:05 pm

Please note the pH of the mash was 5.9 at the end.
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Re: 60% Efficency - what is wrong?

Unread postby Runningman » Thu Jan 25, 2018 5:30 pm

Hi there
In my humble opinion I think your crush is not fine enough. Ive got my mill set to 45 and I get a more floury crush. This could be the cauyse of your low efficiency.
regards
RM
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Re: 60% Efficency - what is wrong?

Unread postby mashy » Thu Jan 25, 2018 8:17 pm

What is your mill set to?
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Re: 60% Efficency - what is wrong?

Unread postby obsahu » Thu Jan 25, 2018 8:32 pm

It's set to 1,5mm. Is it too big? Almost all the grains were crushed.
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Re: 60% Efficency - what is wrong?

Unread postby gandalf the brew » Thu Jan 25, 2018 9:15 pm

I have mine set at 1.2 and my normal efficiency is about 80%.
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Re: 60% Efficency - what is wrong?

Unread postby Lindh » Fri Jan 26, 2018 6:43 am

I run with 0.8 mm and it works great.
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Re: 60% Efficency - what is wrong?

Unread postby Sladek789 » Fri Jan 26, 2018 7:50 am

Have BM50L too.
My basic brew is approx 11kg malt bill, mill set at 1.2mm, consistent efficiency at 73% (5 brews), I do sparge. Once I will be more experienced with the equipment, I will play with the mill gap and other variables to improve efficiency.

As a standard recommendation, I would suggest:
- mill gap between 1mm and 1.2mm
- very well mixing the mash (never too much!)
- longer mashing time could help
- do a final mash out step of 10 mins at 77C after your 66C rest. The hotter the mash (never more than 78C not to extract tannins), the lower the viscosity of the wort is, therefore in theory better draining.
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Re: 60% Efficency - what is wrong?

Unread postby IPA » Fri Jan 26, 2018 8:21 am

gandalf the brew wrote:I have mine set at 1.2 and my normal efficiency is about 80%.


Me too but around 85%

One more thing to lncrease efficiency it is most important to thoroughly mix (mash) the grain and liquor before fitting the top filters.
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Re: 60% Efficency - what is wrong?

Unread postby tsgreen » Fri Jan 26, 2018 1:05 pm

Are you only doing one mash temperature?
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Re: 60% Efficency - what is wrong?

Unread postby BrauTim » Sat Jan 27, 2018 1:04 am

Yes crush is too coarse I would also expect a loss at ph5.9 check water chemistry also.
To brew or not to brew, that would be a stupid question !
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Re: 60% Efficency - what is wrong?

Unread postby 3LB » Mon Jan 29, 2018 10:44 am

Just a word of warning: DO NOT crush too fine with a low weight malt bill or you will get 'wort fountains'.

All other recommendations and tips are valid :)

Good luck!
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Re: 60% Efficency - what is wrong?

Unread postby Onthebrew » Tue Jan 30, 2018 11:41 am

Just out of interest if you don’t specify crush from supplier what is the industry standard or most commonly used?
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Re: 60% Efficency - what is wrong?

Unread postby gandalf the brew » Tue Jan 30, 2018 1:32 pm

From what I used to buy only to get home and find too much flour, about 0.9
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Re: 60% Efficency - what is wrong?

Unread postby Onthebrew » Wed Jan 31, 2018 12:29 pm

Thats probably what ive been getting then as I have never specified. May ask for 1.2 next time, always mean too but forget. asked once at lhbs but they just said its a standard setting , they were not even sure what it was and they don't change it. what are the benefits of a 1.2 crush?
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