59
WB-06 wheat beer yeast will ferment down to about 1.011
and produce a 4.47% alcohol by volume beer when starting
at 1.0454.
The yeast we use for our cider is a yeast from Fermentis called
S-04 and we also supply 10 grams of yeast nutrient in a sachet
to add to the brew to help the yeast ferment well. It is an ale
yeast that sediments very strongly and when used in our cider,
requires no clarification. It will sediment early after the start
of fermentation and ferment from the sediment bottle. Our
cider, when added as two cans, will produce a 1.038 must. To
leave some residual sweetness in that cider kit, you can put the
cooling on before the fermentation is finished, to end at 1.010
which will result in a 3.70% cider. You will need to be taking
SG measurements to control this (See Appendix 3) but it should
be very near 1.010 by day 4. If you let it ferment further over
a few more days it will stop at about 1.007 which is a 4.06%
cider.
WHEN TO COOL ALES
WilliamsWarn will continually grow its products and introduce
more yeasts over time, but in general it would be expected that
we’ll chose ale yeast that are finished by Day 4 and lager, yeast
that will be finished in 6 days for 1.045 initial SG beverages.
A typical 1.045 (initial SG) ale fermentation chart with
Nottingham ale yeast in a WilliamsWarn is shown in Chart 2.
Once all the ingredients have been added, the temperature
will be somewhere near the fermentation temperature of 23°C
(73
°
F) and once you have set the temperature it will control at
that set-point for the first 4 days.
The fermentation starts fast enough that the pressure should
be at 1.5 bar by Day 1, as shown on the chart and the beer will
be fully carbonated, releasing the excess gas you don’t need
through the VPRV.
By Day 3, the final SG has been reached and we then give 1
more day warm maturation.
T-58 will also be finished in about this time frame and S-04
is a faster fermenter so is finished on Day 2. The wheat beer,
WB-06, yeast will also be finished by Day 4.
So on Day 4, you can put the cooling on for our ale yeast for
1.045 SG beers. If you would like to take SG samples to check
each day, or on Day 4, you can do this by taking a sample out of
the tap (See Appendix 3 for details).
However as a rule, WilliamsWarn Standard Kits should reach the
final SG’s each time and you can check fermentation is finished
by looking into the sediment bottle and confirming you have a
decent amount of settled yeast and almost no bubbles rising
anymore.
This 4 day rule will be true probably up to about 1.055 initial
SG made with these 4 ale yeast. However it is a good policy to
take a sample on Day 4 to ensure a higher alcohol fermentation
has finished before you put the cooling on.
Ales at higher initial SG’s will likely need an extra day or two
depending on how high you go. All these 4 ales yeasts can ferment
up to 8% alcohol by volume quite easily, which is a starting SG of
about 1.070 (an extra 1.5kg of DME added to a Standard Kit).
NOTE: With increasing initial SG’s, it is quite important to make
sure the largest proportion of what you add is liquid or dry malt
extract and not just sugar. The yeast needs the proteins in the
malt extract to make more yeast cells to ferment bigger beers.
NOTE: The sharp drops in pressure in the chart on Day 4.5
and Day 5.5 are indicative of the Clarification Process when we
create a pressure differential of 0.25-0.5 bar between the vessel
and the gas cylinder in order to force clarification agent into the
beverage. This is described in Appendices 5 and 8.
WHEN TO COOL LAGERS
A typical 1.045 (initial SG) lager fermentation chart with S-23
or W34/70 lager yeast in a WilliamsWarn is shown in Chart 3.
A Typical 1.040 Fermentation with
Nottingham Ale Yeast 7 day process
0
5
10
15
20
25
30
35
40
45
0
1
2
3
4
5
6
7
SG UNITS & TEMPERATURE
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
P
R
ESS
UR
E
(B
A
R)
DAY
Temperature
SG Units
Pressure
0
1
2
3
4
5
6
7
8
9
0
5
10
15
20
25
30
35
40
0
SG UNITS & TEMPERATURE
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
45
2.25
P
R
ESS
UR
E
(B
A
R)
DAY
Temperature
SG Units
Pressure
Diacetyl Rest 18°C/65°F
CHART 2
A Typical 1.045 Fermentation with
Nottingham Ale Yeast – 7 Day Process
CHART 3
A Typical 1.045 Fermentation with
Lager Yeast – 9 Day Process
Содержание BrewMaster
Страница 3: ...PART ONE YOUR PERSONAL BREWERY...
Страница 14: ...PART TWO MAKING YOUR BEVERAGE WITH THE STANDARD BREWING METHOD...
Страница 39: ...PART THREE MAKING BEVERAGES WITH THE ADVANCED METHOD...
Страница 45: ...PART FOUR APPENDICES...
Страница 78: ...TROUBLE SHOOTING THE WILLIAMSWARN PERSONAL BREWERY...