EISBOCK 實驗 2020.09.26 Beer Recipe | All Grain Maibock/Helles Bock | Brewer's Friend
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EISBOCK 實驗 2020.09.26

133 calories 11.9 g 330 ml
Beer Stats
Method: All Grain
Style: Maibock/Helles Bock
Boil Time: 60 min
Batch Size: 1800 liters (fermentor volume)
Pre Boil Size: 1984.61 liters
Post Boil Size: 1864.62 liters
Pre Boil Gravity: 1.042 (recipe based estimate)
Post Boil Gravity: 1.044 (recipe based estimate)
Efficiency: 45% (brew house)
Calories: 133 calories (Per 330ml)
Carbs: 11.9 g (Per 330ml)
Created: Thursday August 27th 2020
1.044
1.008
4.8%
14.5
21.5
5.4
n/a
 
Fermentables
Amount Fermentable Cost PPG °L Bill %
525 kg The Swaen - Munich Dark525 kg Munich Dark 37 8 91.3%
25 kg The Swaen - BlackSwaen Biscuit25 kg BlackSwaen Biscuit 36 30 4.3%
25 kg The Swaen - BlackSwaen Coffee Malt25 kg BlackSwaen Coffee Malt 36 225 4.3%
575 kg / 0.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
6 lb Saaz6 lb Saaz Hops Pellet 3.5 Boil 60 min 14.48 100%
6 lbs / 0.00
 
Mash Guidelines
Amount Description Type Start Temp Target Temp Time
1250 L -- -- --
500 L -- -- --
Starting Mash Thickness: 3 L/kg
 
Yeast
Fermentis - Saflager - German Lager Yeast W-34/70
Amount:
3 Each
Cost:
Attenuation (avg):
83%
Flocculation:
High
Optimum Temp:
9 - 22 °C
Starter:
No
Fermentation Temp:
-
Pitch Rate:
2.0 (M cells / ml / ° P) 39442 B cells required
0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 2.45 Volumes
 
Target Water Profile
金埔里
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
0 0 0 0 0 0
Mash Chemistry and Brewing Water Calculator
 
Notes

今年很幸運的入圍了兩支酒, 但我分享會當天要上課所以無法親自到場分享, 因此先把兩支酒做法po這邊, 各位同好可以參考~
Doppelbock(加強版山羊烈拉格, 雙料勃克)
釀造日期Date 2019.04.04
釀造總量Batch size 18L(16.5L進桶)
起始麥汁比重O.G 19.2 plato 1.077
結束麥汁比重F.G Dopplebock 1.014@4/17
苦味值IBU 13.5
酒精度ABV Dopplebock 8.4 EST
麥芽配方Grain Bill Munich Malt 6.0 kg
糖化 64~67C 70 min (煮麥汁60分)
啤酒花(Hops) Tettnang AA4.5% 28g (60 min) 洗糖(Sparge) 75C 9L(勿過高溫以免溶出澀味)
酵母(Yeast) WLP833 German Bock 擴培18hr 還有少許低泡時投入
主發酵溫度 20度
壓力發酵 1. 約16.5L麥汁到keg, 加入酵母, 先不加蓋, 用鋁箔封 2. 18hr 確認有發酵跡象後, 加蓋, 打CO2至15 psi. 3. 裝上洩壓閥(15 psi) 4. 置於環溫20C, 3~5 days 5. 結束壓力發酵時要緩慢降壓, 否則酵母會失壓死亡(自溶, 影響啤酒味道)
發酵觀察
4/4 投入酵母17度, 置於冰箱15度, 先不加蓋, 用鋁箔封, 先讓酵母成長
18HR: 確認有發酵跡象後, 加蓋. 裝上單向洩氣閥, 設定15 psi.
24~48HR: 壓力到達22psi, 稍微洩氣一點,
day 7: 移出冰箱做diacetyl rest. SG=1.020
day 13: FG=1.014, 移入17C冰箱開始低溫窖藏程序 day15: 冰箱調溫13C
day18: 冰箱調溫8C
之後移入2度冰箱長期熟成
Eisbock(冰凍濃縮山羊烈拉格, 冰餾勃克)
這支酒就是上支Doppelbock的冰凍濃縮版
將Doppelbock轉桶到小keg, 小keg空桶事先須充滿CO2避免氧化. 紀錄此時keg含酒重量.
小Keg置入冰箱冷凍庫, 酒中的水分開始結凍變冰塊, 但酒精不會. 透過冰凍程序讓酒濃縮. 每個冰庫冷房能力不一樣, 可以每隔幾小時檢查, 搖一下keg來判斷結冰的狀況(只能大致估計, 沒辦法事先很準確知道結冰比例)
當覺得結冰比例到達目標後, 再次轉桶到另一個小keg. 只有濃縮過的酒會被轉過去, 固體的冰塊會留在原來的keg.
轉桶完畢後, 紀錄原先keg+冰塊重量. 減去空keg重量, 就會得到殘留冰塊重量, 也就知道酒被濃縮的比例. 舉例: 原先5kg 8%的酒, 經過冰凍濃縮, 殘留冰塊1kg, 因此得到4kg 10%的酒.
以上是理想算法, 事實上殘留的冰塊中還是有酒存在, 需要再打個折.
如果還需要將濃縮後的酒裝瓶, 需要用等壓裝瓶方式, 又會增加一層氧化或感染的風險... 總之, Eisbock製程繁瑣又很難穩定, 難怪很少人做

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  • Last Updated: 2020-09-28 14:42 UTC
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