Brew Number 123

• Twøbays Centennial IPA (Gluten Free) (Brewfather version)

Ingredients

• 4.8kg Pale Millet Malt
• 1.5kg Goldfinch Millet Malt
• 600g Crystal Rice Malt
• 1.25kg Biscuit Rice Malt
• 200g Cane Sugar
• 150g Centennial hops (10% AA)
• 30mL Beta-glucanase
• 30mL Alpha-amylase
• 10mL Glucoamylase
• 4g Yeast nutrient
• 5g Irish moss
• 2 x Mangrove Jack's M-44 yeast packets
• Sachet of Mangrove Jacks Liquid Finings

Used Brewzilla for mashing.

Process

• Milled millet twice to ~0.75mm.
• Milled rice twice to ~0.95mm.
• Brought 24.5L of water to 85C.
• Add malts.
• Stir on and off for 20 minutes.
• Cooled to 50C.
• Add 30mL of beta glucanase, stiring for 30 minutes.
• Add 30mL of alpha amylase and 10mL glucoamylase, set temperature to 80C for 120 minutes.
• Sparge with 5.9L water.
• Started boil with ??L wort, 13.5% brix, pH 4.5.
• Added 40g Centennial.
• After 45 minutes add 30g Centennial.
• After 10 minutes add 30g Centennial.
• Boil for 5 mins more.
• Turn off heaters.
• Chill wort.
• Pump to fermenter filtered with muslin bag.
• Cooled to 20C and pitch yeast.

Used enzyme dosages from GF home brewing tutorial, seem high but there are plenty of enzymes..

Ended up with 20L in Fermzilla.

Brew house efficiency calculated at 63.6% (18.4 ppg)

The yeast has an apparent attenuation of 81% If that is so the final gravity should be...

FG = (SG - 1000) * (1 - AA/100) + 1000 
   = ((1064 - 1000) * (1 - 81/100)) + 1000
   = 1012

Date	Measured SG	Temperature	Corrected SG	Brix	Notes
27/02/2021 18:30	1060	33.0	1064
28/02/2021 14:30	1060	20.0	1060	16%
08/03/2021 11:00					Chilled to 2C
08/03/2021 21:00					Dry hopped with 45g Centenial, added chitosan, reset to 20C

Notes

• Yeast pitched at 20C.
• Temperature set at 20C.
• Used iSpindel3.
• Spunding valve set to 20 PSI (ale should have 2.3-2.6 volumes of CO2, used 2.0 to try and stop the iSpindel leaking).
• ABV = 1.646 * RI - 2.703 * (145 - 145 / SG) - 1.794 =
• Grafana plot

Appendix

• BrixConversion
• Refractometer calculator
• BrewCalculator
• Carbonation Calculator
• HydroCorrection
• ABV measurements

-- Main.darius - 27 Feb 2021