You Make Your Own Beer? – Angel Over My Shoulder Brew 2011 and BIAB Water Volume Calculations

Tomorrow is the night I brew my yearly beer with my little brother over my shoulder. This year it will be a Sassafras Spruce Porter. Here are my plans.
 
 
 
 
 
 
 
 
 
The Recipe
5.5 Gallons
90 minute boil
60 minute mash at 156F BIAB
1.050 @ 80% efficiency
24 IBS
23.2 SRM
4.9% ABV estimated
 
 
Grains
7 lbs 8.0 oz Pale Malt (2 Row) US (2.0 SRM) Grain 1 77.8 %
1 lbs Caramel/Crystal Malt – 60L (60.0 SRM) Grain 2 10.4 %
10.2 oz Wheat, Torrified (1.7 SRM) Grain 3 6.6 %
8.0 oz Chocolate Malt (450.0 SRM) Grain 4 5.2 %
9.64 # Total
 
 
Hops
0.55 oz Northern Brewer [8.00 %] – Boil 60.0 min Hop 5 18.0 IBUs
0.10 oz Columbus (Tomahawk) [14.60 %] – Boil 60.0 min Hop 6 6.0 IBUs
 
 
Other
6.00 oz Spruce Tips (Boil 60.0 mins) Spice 7 –
2.00 oz Sassafras Root Bark (Boil 60.0 mins) Spice 8 –
 
 
Yeast
Safale US05 64F 2-4 days Raise to 68F
Primary 3-4 weeks
Secondary none

    The Math


Water Volumes

  • Batch Volume = 5.5 gallons
  • 90 minutes x 2 gallon/hr boil off = 3 gallons
  • 9.64# x 0.05 gallons/# absorption = 0.48 gallons
  • 8.98 gallons, use 9 gallons
  •  
     
    Salt Additions

  • 23.2 SRM = Ruby Brown which means I need 50 mg/l Ca and 75 mg/l HCO3 so I will use Calcium Carbonate (chalk)
  • CaCo3 is 40% Ca and 60% CO3
  • My base water is 2 mg/l Ca so I need to add 48 mg/l Ca
  • 9 gallons of mash water = 34.07 Liters
  • 34.07 L x 48 mg/l = 1635.36 mg Ca total needed
  • 40% x Ca = 1635.36
  • Ca=1635.36/40% = 4,088.4 mg = 4.1 grams
  • CaCO3 is 1.8 grams per teaspoon
  • 4.1 grams / 1.8 grams per teaspoon = 2.27 teaspoons so I’ll add 2-1/4 teaspoons of CaCO3
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