Brew Day: Bent Monk Marzen-June 4, 2010

Brewday: Bent Monk Marzen - June 4, 2010

Recipe Values:

Volume to fermenter[ltr (gal)]:	23.00	Total volume[ltr (gal)]:	26.72	Losses [ltr (gal)]:	3.72
Original Gravity[SG]:	1.051	Colour [SRM(EBC)]:	7.33(14.44)
Mash Efficiency [%]:	75.00%	Bitterness[IBU]:	19.22

Preboil Values:

Mash water volume [ltr (gal)]:	18.23 (4.82)	Mash tun volume [ltr (gal)]:	28.20 (7.45)	Mash tun loses [ltr (gal)]:	2.00 (0.53)
Preboil wort volume [ltr (gal)]:	29.00 (7.66)	@ mash out temp.	29.69 (7.84)	Preboil gravity [SG]:	1.044

Postboil Values:

Evapouration [ltr (gal)]:	4.00 (1.06)	Evapouration Rate [ltr (gal)/hr]:	4.00 (1.06)	Boil time [Minutes]:	60.00
Postboil wort volume [ltr (gal)]:	26.72 (7.06)	@ boiling temp.	27.84 (7.35)	Boiler lose [ltr (gal)]:	2.00 (0.53)
Postboil target gravity [SG]:	1.051	mash items only	1.051

Style: 3B. Oktoberfest

Description:

A simple recipe for Marzen/Oktoberfest.

Estimated Original Gravity[SG]: 1.051	Estimated Final Gravity[SG]: 1.013	Alcohol By Volume[%]: 5.13
Bitterness [IBU]: 19.22	Colour [SRM(EBC)]: 7.33 (14.44)
Balance: 0.783	BU:GU ratio: 0.377

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Munich Malt - 10L	1.015	29.41%	1821.94 (4.02)	29.98%
Pilsner Pale Malt (Barrett Burston)	1.010	19.61%	1184.84 (2.61)	19.50%
Vienna Malt	1.026	50.98%	3070.31 (6.77)	50.52%

Hops

Hop Utilisation Method: Tinseth

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Hallertau Hersbrucker	4.25%	4.22	21.97%	11.62 (0.41)	60.00
Hallertau Tradition German	6.00%	15.00	78.03%	29.23 (1.03)	60.00

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
Bavarian Lager - Wyeast 2206	medium-high	75.00%	8.00 (46.40)	14.00 (57.20)	9% ABV

Estimated required yeast cells (billion):

439.88

Dried yeast (gm):	23.40

No of liquid yeast(Wyeast/Whitelabs) packs:	4.68	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	623.94	(Assumes 25% trub and 94% viability)
One day settling	311.97	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	162.92	(Assumes 25% trub and 80% viability)

Note yeast viability reduces greatly over time as demonstrated in the table below.

Age	Viability	Age	Viability
1 week	80%	2 weeks	70%
3 weeks	60%	4 weeks	50%
5 weeks	40%	6 weeks	25%
7 weeks	15%	8 weeks or older	less than 10%

Viability deterioration varies greatly between different yeast strains. You should consider doing a yeast starter for any yeast older than 2 weeks to ensure yeast viability prior to pitching.

Liquor to grist ratio [ltr/kg]:

Saccrification rest - 3.00 to 4.00 [ltr/kg] is recommended.

A lower liquor to grist ratio will produce a less fermentable wort (with more complex sugars) while a higher liquor to grist ratio can result in a more fermentable wort.

Both extremes will require a longer rest time ( up to 90 minutes )

Protein rest - less then 2.50 [ltr/kg] is recommended.

Mash Schedule

Name	Method	Step temp [C (F)]	Step time [minutes]	Addition amount [ltr (gal)]	Addition temp [C (F)]	Liquor/grist ratio [ltr/kg]
Saccrification	Direct	67.00 (152.60)	60	0.00 (0.00)	0.00 (32.00)	3.20

Mash Details

Mash water required [ltr (gal)]:	18.23 (4.82)	Mash tun volume required [ltr (gal)]:	28.20 (7.45)
Grain Weight [gms (lbs)]:	6077.08 (13.40)	Mash gravity @ 100% conversion [SG]:	1.046

Number of batches:

General:

Minimum required efficiency:	75.00 %	Max expected efficiency	84.08 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	5.89	14.50	63.42	75.33
2	14.50	14.50	25.30	30.05
Combined	20.39	29.00	44.36	52.69

Assumed constants:

The following are assumed in calculations below and will eventually be able to be set.

Absorption [l/kg]:	1.3	Grain displacement [l/kg]:	0.67