What is it?

[chlamy]

This solid material is always present when I do BIAB. What is it? Maybe setting too fine during milling? Will it hurt the beer? I've added the whole trub in the fermenter and really haven't thought it affected the beer.

 

[Gear101]

spent grains, dead yeast or hop particles ?

 

[chlamy]

This is during the mash.

 

[mrphillips]

Looks totally normal to me. I'm guessing you used flacked wheat in this batch? It's just a guess. I'm basing my assumption on a Witbier and an APA I just brewed. The ingredients I used, among others, was flacked wheat, and there's sooooooo much fine material in grains, there's no hope of getting all of it out...at least not on the operation I'm running

 

[chlamy]

I think it is finely ground grain that is not soluble. It is like a fine powder that never dissolves.

 

[grv]

I think it is finely ground grain that is not soluble. It is like a fine powder that never dissolves.

I agree. I have this in every pre-boil sample I take to measure gravity. Always assumed it was due to the fine crush.

 

[lumpher]

nothing to worry about. it's just grain dust settled

 

[DisturbdChemist]

Its either grain dust or denatured proteins. Its normal. Dont worry about it.