Here we go again
Lot 2 through rims.
22kg barret burston 5kg of which is fresh grain
3l/kg mash thickness
Strike water /temp 66l 68c
Added grain temp 61.5
Controller set to 64
Recirc started 8.20
after 5 hours brix at 19 og 1.078
Steady at 1.078
25l sparge water added at 70c.
Raised grain bed temp to 63.88 from 59c. Then kept sparging with cold water until collected an additional 30l @ gives a
total of 90l.
60l@ 14.5 brix 1.059 and 30 @ 8 brix 1.031. If I combine the two I get 90l at
"1.059 -1.031=0.028
Total volum is 90l
Liquid one 2/3 66.66%
liquid 2 1/3 33.3%
66.6% of .028 = 0.018
1.031 + .018=1.049 65% efficiency.."
Tomorrow I will mix two sample. 1:2 see how accurate that math is.
Soooo this time round I added grain @ 68degrees rather than 60 and had controller on 64 and I stired three times througout the mash, all for 1 extra point on final gravity. I found this chart .according to beersmith forum comes from a reputable source.
First_wort_gravity (1).gif
I did 3l/kg and came out 1brix low which is not terrible bout 0.003sg low.
so it must be my sparge letting me down. I sparged slow about 1h 15min to collect 90l i used combination warm and cold water 68 degrees but still came out under. Think I need to work things out accurately losses/ grain absorbtion etc, and sparge with all warm water.. :handgestures-thumbdown:
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