Many have asked how the
brewday goes at Ye Olde Belgian Mare Brewery. So I decided to put
together the following narrative for the general edification of the
beer-drinking public.
The typical brewday
starts with the filling of the boiler. The boiler is filled with
pure well water to a depth of 29 inches. This translates to
approximately 120 gallons. Allowing for losses in the mashing and
boiling phases of the brewing process, this initial 120 gallons will
translate to 100 gallons of beer in the bottle.
Once the boiler is
filled, the fire is started in the firebox. The Belgian Mare's
boiler is direct-fired with wood, so getting the water up to heat can
take a couple of hours. This is no problem as we still have to mill
the grains.
Grains are milled in a
modified Maltmill that has a hopper with about 75 lbs. capacity built
into it. Originally this mill was powered by a hand crank, which is
the reason why one of my shoulders is so much larger than the other.
Recently, our welder friend, Perley, loaned me a 1950/60s vintage low
speed/high torque drill. This three-handled, cast-metal encased
beast turns at 350 rpm and has enough torque to twist the head off
the Statue of Liberty (not that one would want to do such a thing).
Thus it is the perfect tool for powering our grain mill.
I measure out the proper
amount of grains for the recipe of the day and run them through the
mill using the aforementioned drill to power the mill. As the grains
pass through the mill, they drop into a 5-gallon bucket. As they
bucket fills, it is poured into the mashtun in preparation for
mashing.
The mashtun is an
insulated stainless steel vessel with an oak false-bottom. The
false-bottom is essentially a floor above the actual bottom of the
mashtun. It supports the grains and has holes drilled into it to
allow water to pass through.
Once all the grains are
milled and the water is up to heat, hot water is run into the mashtun
to start the mashing phase. To take advantage of gravity during
runoff, the mashtun is situated higher than the boiler. A small
electric pump is used to run hot water into the mashtun. Other than
the drill on the mill, this is the only mechanized part of the
process at the brewery.
As the hot water enters
the mashtun the grain is stirred to ensure that all the grain is
wetted and ready for the mashing process. Once all the grain is
wetted and the temperature is correct, the cover is placed on the
mashtun and it is left alone for the next 90 minutes. During this
time, enzymes contained in the grains convert starches to fermentable
sugars. Once the mashing is complete, the sugar-laden liquid is
drained from the mashtun into the boiler. Hot water is also cycled
from the boiler to the mashtun to wash any remaining sugars from the
grains.
When the runoff is
complete, the fire under the boiler is increased and the sugary
liquid, now called wort, is boiled for two hours. Boiling sanitizes
the wort and causes proteins to precipitate. During the boiling
process, depending on the recipe for the beer I wish to make, hops
will be added at intervals. Given the size of our brick firebox, once
the wort starts to boil, the gate on the fire box can be closed and
the wort will continue to boil for two hours without any additional
fuel being added to the fire.
Once the boil is
finished, the wort is allowed to cool in the covered boiler. Since
everything has been sanitized by the boiling process, as long as we
leave it alone, we do not have to worry about infection during
cooling.
When the wort reaches the
correct temperature, usually the next day, it is run from the boiler
to a fermenter in the cellar. Since this is the “cold side” of
the brewing process, the fermenters have to be cleaned and sanitized
before the wort is run into them. As the wort is being run into the
fermenter it is allowed to aerate (splash around) to help with the
start of the fermentation process. Once all the wort is in the
fermenter, the proper amount of yeast is pitched into the wort. Then
we wait until the yeast is done creating the alcohol and esters that
make the beer what it is.
When the yeast is done,
it is time to bottle! Once all the freshly brewed beer is in
bottles, the hard part begins: waiting. Since our beers are
naturally conditioned and carbonated, they need a lot of time in the
bottle. During this time the yeast finishes up the last of the
fermentation process and gives the beer its finished flavor. None of
our beers are ready in under one month and they may take up to three
months to fully condition and carbonate. But, trust me, it is well
worth the wait.