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Recipies: How To Brew Your
First Beer
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These instructions are designed for the
first-time Brewer. What follows can be considered an annotated recipe for a
fool-proof Ale beer. Why an Ale beer? Because Ales are the simplest to brew.
Brewing Beer is simple and complicated, easy and hard. Compare it to fishing -
Sit on the end of the dock with a can of worms and a cane pole and you will
catch fish. Going after a specific kind of fish is when fishing gets
complicated. Brewing the specific kind of beer you want is the same thing.
There are many different styles of beer and many techniques to brew them.
Brewing a beer is a combination of several
general processes. First is the mixing of ingredients and bringing the
solution (wort) to a boil. Second is the cooling of the wort to the
fermentation temperature. Next the wort is transferred to the fermenter and
the yeast is added. After fermentation, the raw beer is siphoned off the yeast
sediment and bottled with a little extra sugar to provide the carbonation. But
there are three important things to keep in mind every time you brew:
Cleanliness, Preparation and Good Record Keing.
Cleanliness
Cleanliness is the foremost concern of the
brewer. After all, Fermentation is the manipulation of living organisms, the
yeast. Providing good growing conditions for the yeast in the beer also
provides good growing conditions for other micro-organisms, including
bacteria. Cleanliness must be maintained throughout every stage of the brewing
process.
Preparation
Take the time to prepare your brewing area.
Have the ingredients ready on the counter. Prepare your brewing water. Have
the ice on- hand to cool the wort when its done boiling. Is the Fermenter
clean and sanitized? Make sure that all equipment is clean and ready to go
before starting. Patience and planning are necessities.
Record Keeping
Always keep good notes on what ingredients,
amounts and times were used in the brewing process. The brewer needs to be
able to repeat good batches and learn from poor ones.
Brewing Terms:
The following terms will be used throughout
these instructions. Many of the terms come from German and appropriate
pronunciations are given. On the other hand, German pronunciation is optional.
Ale - beer
brewed from a top-fermenting yeast with a relatively short, warm
fermentation.
Alpha Acid Units
(AAU) -A home brewing measurement of Hops. Equal to the weight in
ounces multiplied by the percent of Alpha Acids.
Attenuation
- The degree of conversion of sugar to alcohol and CO2.
Beer -
beverage made by fermenting malted barley and seasoning with Hops.
Cold Break -
Proteins that coagulate and fall out of solution when the wort is rapidly
cooled prior to Pitching the yeast.
Conditioning
- An aspect of Secondary Fermentation in which the yeast refine the flavors
of the final beer. Conditioning continues in the bottle.
Fermentation
- The total conversion of malt sugar to beer, defined here as two parts,
Primary and Secondary.
Hops -
Hop vines are grown in cool climates and brewers make use of the cone-like
flowers. The dried cones are available in Pellets, Plugs, or whole.
Hot Break - Proteins
that coagulate and fall out of solution during the wort boil.
Gravity - Like density,
gravity describes the concentration of malt sugar in the wort. The specific
gravity of water is 1.000 at 59F. Typical beer worts range from 1.035
1.055 before fermentation (Original
Gravity).
International Bittering Units (IBU)
A more precise method of measuring Hops.
Equal to the AAU multiplied by factors for percent utilization, wort volume
and wort gravity.
Krausen (kroy-zen)
- Used to refer to the foamy head that builds on top of the beer during
fermentation. Also an advanced method of priming.
Lager - A
beer brewed from a bottom-fermenting yeast and given a long cool
fermentation.
Pitching -
Term for adding the yeast to the fermenter.
Primary
Fermentation - The initial fermentation activity marked by the
evolution of carbon dioxide and Krausen. Most of the total attenuation
occurs during this phase.
Priming -
The method of adding a small amount of fermentable sugar prior to bottling
to give the beer carbonation.
Racking -
The careful siphoning of the beer away from the Trub.
Secondary
Fermentation - A period of settling and conditioning of the beer
after Primary Fermentation and before bottling.
Trub (trub or troob)
- The sediment at the bottom of the fermenter consisting of Hot and Cold
Break material and dead yeast.
Wort (wart or wert)
- The malt-sugar solution that is boiled prior to fermentation.
Zymurgy -
The science of Brewing and Fermentation.
Required Equipment
Airlock -
Several styles are available. Fill to the water line with boiled water and
cap it (if it has one).
Boiling Pot
- Must be able to comfortably hold a minimum of 3 gallons; bigger is better.
Use only Stainless Steel, Ceramic- coated Steel, or Aluminum. Plain steel
will give off-flavors.
Bottles -
Two cases of recappable 12 oz bottles. Use Corona or heavier glass import
bottles. Twist-offs do not work well. Used champagne bottles are ideal if
you can find them.
Bottle Capper -
Either Hand Capper or Bench Capper. Bench Cappers are more versatile and are
needed for the champagne bottles, but are more expensive.
Bottle Caps -
Either standard or oxygen absorbing are available.
Bottle Filler -
Rigid plastic (or metal) tube with spring loaded valve at the tip for
filling bottles.
Bottle Brush -
Necessary for first, hard-core cleaning of used beer bottles.
Fermenter(s)
- The 6 gallon food-grade plastic pail is recommended for beginners. These
are very easy to work with. Glass carboys are also available, in 5, 6, and
7.5 gallon sizes.
Racking Cane
- Rigid plastic tube with sediment stand-off.
Siphon/Hose
- Available in several configurations, consisting of clear plastic tubing
with optional Racking Cane and Bottle Filler.
Stirring Paddle
- Food grade plastic paddle (spoon) for stirring the wort during boiling.
Thermometer - Obtain a
thermometer that can be safely immersed in the wort and has a range of at
least 40F to 150F. The floating dairy thermometers are great.
Optional but Highly
Recommended
Bottling Bucket
- A 6 gallon food-grade plastic pail with attached spigot and fill-tube. The
finished beer is racked into this for priming prior to bottling. Racking
into the bottling bucket allows clearer beer with less sediment in the
bottle. The spigot set-up is used instead of the Bottle Filler above,
allowing greater control of the fill level and no hassles with a siphon
during bottling.
Ingredients
Commercial beer kits always provide 3-4
pounds of malt extract and instructions to add a couple pounds of sugar.
Dont Do It! The resultant beer will have an unpleasant cidery taste. The
following is a basic beer recipe:
5-7 pounds of Hopped Pale Malt Extract
syrup. (OG of 1.038 - 1.053)
5 gallons of water.
1-2 ounces of Hops (if desired for more
hop character)
1 packet of dry Ale yeast, plus 1 packet
for back-up.
¾ cup corn sugar for Priming.
This is a basic Ale beer and quite tasty.
You will be amazed. Further descriptions of the ingredients follow.
Malt Extract:
Using Malt Extract is what makes first time
brewing simple. Malt Extract is the concentrated sugars extracted from malted
barley. It is sold in both the liquid and powdered forms. The syrups are
approximately 20 percent water, so 4 pounds of dry Malt Extract (DME) is
roughly equal to 5 pounds of Malt Extract syrup. Malt Extract is available in
both the Hopped and Unhopped varieties. Screen the ingredients to avoid corn
sugar. Munton & Fison, Alexanders, Coopers, Edme and Premier are all good
brands. Laaglander is another good brand but the brewer needs to be aware that
it contains extra unfermentables which add to the body, making the beer finish
with an FG of about 1.020.
Using Unhopped extract means adding 1-2
ounces of Hops during the boil for bittering and flavor. Hops may also be
added to the Hopped Extracts towards the end of the boil for more Hop
character in the final beer. Unhopped extract is preferable for brewers making
their own recipes.
A rule of thumb is 1 pound of malt extract
(syrup) per gallon of water for a light bodied beer. One and a half pounds per
gallon produces a richer, full bodied beer. One pound of malt extract syrup
typically yields a gravity of 1.034 - 38 when dissolved in one gallon of
water. Dry malt will yield about 1.040 - 43. Malt extract is commonly
available in Pale, Amber and Dark varieties, and can be mixed depending on the
style of beer desired. Wheat malt extract is also available and more new
extracts are coming out each year. With the variety of extract now available,
there is almost no beer style that cannot be brewed using extract alone.
The next step in complexity for the
homebrewer is to learn how to extract the sugars from the malted grain
himself. This process, called Mashing, allows the brewer to take more control
of producing the wort. This type of homebrewing is referred to as All-Grain
brewing.
Water
The water is very important to the
resulting beer. After all, beer is mostly water. If your tap water tastes good
at room temperature, it should make good beer. It will just need to be boiled
for a few minutes to remove the chlorine and kill any bacteria. If the water
has a metallic taste, boil and let it cool before using to let the excess
minerals settle out, and pour it off to another vessel. Do not use water from
a salt based water softener. A good bet for your first batch of beer is the
bottled water sold in most supermarkets as Drinking Water. Use the 2.5 gallon
containers. Use one container for boiling the extract and set the other aside
for addition to the fermenter later.
Hops
This is another involved subject. There are
many varieties of Hops, but they are divided into two main categories:
Bittering and Aroma. Bittering Hops are high in Alpha Acids (the main
bittering agent), typically around 10 percent. Aroma Hops are lower, around 5
percent. Several Hop varieties are in between and are used for both purposes.
Bittering Hops are added at the start of the boil and usually boiled for an
hour. Aroma Hops are added towards the end of the boil and are typically
boiled for 15 minutes or less (Finishing). Hops can also be added to the
fermenter for increased hop aroma in the final beer, called Dry Hopping, but
this is best done during Secondary Fermentation. A mesh bag, called a Hop Bag,
may be used to help retain the hops and make removal of the Hops easier prior
to fermentation. Straining or removal of the Hops before fermentation is
largely a matter of personal preference.
Published beer recipes often include a Hops
schedule, with amounts and boil times specified. Other recipes specify the
Hops in terms of AAUs and IBUs. AAUs are a convenient unit for specifying Hops
when discussing Hop additions because it allows for variation in the Alpha
Acid percentages between Hop varieties. For the purposes of this recipe, 7
AAUs are recommended for the Boil (60 minutes) and 4 AAUs for Finishing (15
minutes). This is assuming the use of Unhopped malt extract; if using Hopped,
then only add the 4 AAUs for finishing. In this recipe, these amounts
correspond to 22 IBUs for the boil, and 1.25 IBU for the finish. IBUs allow
for variation in brewing practices between brewers, yet provide for nearly
identical final Hop bitterness levels in the beers. This recipe is not very
bitter.
Yeast
There are several aspects to yeast; it is
the other major factor in determining the flavor of the beer. Different yeast
strains will produce different beers when pitched to identical worts. Yeast is
available both wet and dry, for Ale and Lager, et cetera. For the first-time
brewer, a dry Ale yeast is highly recommended. There are several brands
available, including Coopers, Edme, Nottingham, and Red Star. All of these
listed will produce good results.
Ale yeast are referred to as top-fermenting
because much of the fermentation action takes place at the top of the
fermenter, while Lager yeasts would seem to prefer the bottom. While many of
todays strains like to confound this generalization, there is one important
difference, and that is temperature. Ale yeasts like warmer temperatures,
going dormant below 55F (12C), while Lager yeasts will happily work at 40F.
Using Lager yeast at Ale temperatures 65-70F (18-20C) produces Steam Beer, or
what is now termed California Common Beer. Anchor Steam Beer was the
founder of this unique style.
Yeast Starter
Liquid yeast must be and all yeast should
be, pitched to a Starter before pitching to the beer in the fermenter. Using a
starter gives yeast a head start and prevents weak fermentations from
under-pitching. Dry Yeast should be re-hydrated before pitching. Re-hydrating
dry yeast is simple.
1. Put 1 cup of warm (90F, 35C) boiled
water into a sterile jar and stir in the yeast. Cover with Saran Wrap and
wait 10 minutes.
2. Stir in one teaspoon of sugar.
3. Cover and place in a warm area out of
direct sunlight.
4. After 30 minutes or so the yeast
should be actively churning and foaming. This is now ready to pitch.
Liquid yeast is regarded as superior to Dry
yeast because of the refinement of yeast strains present and little risk of
bacterial contamination during manufacture. Liquid yeast allows for greater
tailoring of the beer to a particular style. However, the amount of yeast in a
liquid packet is much less than the amount in the dry. For best results, it
needs a starter. The packet must be squeezed and warmed to 80F at least two
days before brewing. One day before, it should be pitched to a wort starter
made from ¼ cup of DME and a pint of water that has been boiled and cooled to
75F (25C). Adding a quarter teaspoon of yeast nutrient is also advisable. Let
this sit in the same warm place until brewing time the next day. Some foaming
or an increase in the white yeast layer on the bottom should be evident. The
Starter process may be repeated to provide even more yeast to the wort to
insure a strong fermentation.
The Wort and Oxygen
The use of oxygen in brewing is a
double-edged sword. The yeast need oxygen to grow and multiply enough to
provide a good fermentation. When the yeast has first been pitched, whether to
the starter or the beer, it first seeks to reproduce. The yeast makes use of
the dissolved oxygen in the wort for this. Boiling the wort drives out the
dissolved oxygen, which is why aeration of some sort is needed prior to
fermentation. The yeast first use up all of the oxygen in the wort for
reproduction, then get down to the business of turning sugar into alcohol and
CO2 as well as processing the other flavor compounds.
On the other hand, if oxygen is introduced
while the wort is still hot, the oxygen will oxidize the wort and the yeast
cannot utilize it. This will later cause oxidation of the beer which gives a
wet cardboard taste. The key is temperature. The generally accepted
temperature cutoff for preventing hot wort oxidation is 80F. In addition, if
oxygen is introduced after the fermentation has started, it will not be
utilized by the yeast and will later cause the wet cardboard or sherry-like
flavors.
This is why it is important to cool the
wort rapidly to below 80F, to prevent oxidation, and then aerate it by shaking
or whatever to provide the dissolved oxygen that the yeast need. Cooling
rapidly between 90 and 130F is important because this region is ideal for
bacterial growth to establish itself in the wort.
Most homebrewers use cold water baths
around the pot or copper tubing Wort Chillers to accomplish this cooling in
about 20 minutes or less. A rapid chill also causes the Cold Break material to
settle out, which decreases the amount of protein Chill Haze in the finished
beer.
Aeration of the wort can be accomplished
several ways: shaking the container, pouring the wort into the fermenter so it
splashes, or even hooking up an airstone to an aquarium air pump and letting
that bubble for an hour. For the latter method, (which is popular) everything
must be sanitized! Otherwise, Infection City. These instructions recommend
shaking the starter and pouring/shaking the wort. More on this later.
Sanitization
So far, sanitization of ingredients and
equipment has been discussed but not much has been said about how to do this.
The definition and objective of sanitization is to reduce bacteria and
contaminants to insignificant or manageable levels. Sterilization is not
really possible. The Starter solution, Wort and Priming solutions will all be
boiled, so those are not a problem (usually).
One note - Do Not Boil the
Yeast! You need them to be alive.
The easiest sanitizing solution is made be
adding 1 tablespoon of bleach to 1 gallon of water (4 ml per liter). This can
be prepared in the Fermenting Bucket. Immerse all of equipment - airlock,
hoses, paddles, rubber stopper, fermenter lid and anything else contacting the
beer. Let it sit for 20 minutes. Rinsing is not really necessary at this
concentration, but you may want to rinse with boiled water anyway to avoid any
chance of off-flavors.
Clean all equipment as soon as possible.
This means rinsing out the fermenter, tubing, etc. as soon as they are used.
It is very easy to get distracted and come back to find the syrup or yeast has
dried hard as a rock and the equipment is stained. Keep a large container with
chlorine water handy and just toss things in, clean later.
Rinsing bottles after each use eliminates
the need to scrub bottles. If your bottles are dirty, moldy or whatever,
soaking and washing in a mild solution of chlorine bleach water for a day or
two will soften most residue. Brushing with a bottle brush is a necessity to
remove stuck residue. Dish washers are great for cleaning the outside of
bottles and heat sterilizing, but will not clean the inside where the beer is
going to go; that must be done beforehand. Trisodium Phosphate and B-Brite
also work very well but must be rinsed carefully. Do not wash with soap. This
leaves a residue which you will be able to taste. Never use any scented
cleaning agents, these odors can be absorbed into the plastic buckets and
manifest in the beer. Fresh-Lemon Scented Pinesol Beer is not very good. Also,
dishwasher Rinse Agents will destroy the Head retention on your glassware. If
you pour a beer with carbonation and no head, this is a common cause.
Beginning the Boil
Bring 2 ½ gallons water to a boil in a
large pot. Meanwhile, re-hydrate the dry yeast. When the water is boiling,
remove from the heat. Add all the malt syrup to the hot water and stir until
dissolved. Make sure there is no syrup stuck to the bottom of the pot by
scraping the bottom of the pot with the spoon while stirring. It is very
important not to burn any malt stuck to the bottom when the pot is returned to
the heat. Burnt sugar tastes terrible.
The following stage is critical. The pot
needs to be watched continuously. Return the pot to the heat and bring to a
rolling boil, stirring frequently. Start timing the hour.
If you are adding bittering hops, do so
now.
A foam may start to rise and form a smooth
surface. This is good. If the foam suddenly billows over the side, this is a
boil over (Bad). By the way, adding hop pellets at this stage tends to trigger
a boilover if the pot is really full. Murphys Law... The liquid is very
unstable at this point and remains so until it goes through the Hot Break
(when the wort stops foaming). This may take 5-20 minutes. The foaming can be
controlled by lowering the heat and/or spraying some water on the surface from
a spray bottle. The heat control using an electric range is poor. Try to
maintain a rolling boil. Boiling 2.5 - 3 gallons can be maintained fairly
easily on an electric stove. Boiling the full 5 gallons of water on electric
ranges is almost impossible (not enough heat) and dangerous to lift when the
boil is over.
Continue the rolling boil for the remainder
of the hour. Stir occasionally to prevent scorching. There may be a change in
color and aroma and there will be particles floating in the wort. This is not
a concern, its the hot break material. If you are adding the finishing hops,
do so during the last fifteen minutes. Add during the last five minutes if
more hop aroma is desired. This provides less time for the volatile oils to
boil away.
Cooling the Wort
At the end of the boil, cooling the wort is
very important. While it is above 130F, bacteria and wild yeasts are
inhibited. It is very susceptible to oxygen damage as it cools though. There
are also sulfur compounds that evolve while the wort is hot. If the wort is
cooled slowly these di-methyl sulfides can dissolve back into the wort causing
cabbage or cooked vegetable flavors in the final beer. The objective is to
rapidly cool the wort to below 80F before oxidation or contamination can
occur. Here is one preferred method for cooling the wort.
Place the pot in a sink or tub filled with
cold/ice water that can be circulated around the hot pot. While the cold water
is flowing around the pot, gently stir the wort in a circular pattern so the
maximum amount of wort is moving against the sides of the pot. If the water
gets warm, replace with cold water. The wort will cool to 80F in about 20
minutes. When the pot is still warm to the touch, the temperature is close
enough.
Pour the reserved 2.5 gallons of water into
the sanitized fermenter. Pour the warm wort into it, allowing vigorous
churning and splashing. Oxidation of the wort is minimal at these temperatures
and this provides the dissolved oxygen that the yeast need to reproduce.
Combining the warm wort with the cool water should bring the mixture to
fermentation temperature. It is best for the yeast if the pitching temperature
is the same as the fermentation temperature. For Ale yeasts, the fermentation
temperature range is 65-75F. (The temperatures mentioned are not absolutely
critical and a thermometer is not absolutely necessary, but is nice to have.)
Note: Do not add commercial ice to the wort
to cool. Commercial Ice harbors lots of dormant bacteria that would love a
chance to work on the new beer. Bottled Drinking Water is usually pasteurized
or otherwise sanitized to inhibit contamination.
Pitching the Yeast
If the Dry Yeast Starter is not foaming or
churning, use the backup yeast. Repeat the re-hydration procedure and then
pitch the Yeast Starter into the beer, making sure to add it all. Put the lid
in place and seal it. Do not put the airlock in quite yet. Place a piece of
clean Saran Wrap over the hole in the lid and cover it with your hand.
With the fermenter tightly sealed, pick it
up, sit in a chair, put the fermenter on your knees and shake it several
minutes to churn it up. This mixes the yeast into the wort and provides more
dissolved oxygen that the yeast need to grow. Wipe off any wort around the
hole with a paper towel that is wet with bleach water and place the sanitized
airlock and rubber stopper in the lid. The airlock should be filled to the
line with the bleach water solution.
Active fermentation should start within 12
hours. It can be longer for liquid yeasts because of lower cell counts, about
24 hours.
Fermentation
Put the fermenter in a protected area like
the bathtub. If foam escapes it will run down the drain and is easy to clean.
The temperature here is usually about the most stable in the house. Animals
and small children are fascinated by the smell and noises from the airlock, so
keep them away.
The airlock should be bubbling in twelve
hours. Maintain a consistent temperature if possible. Fluctuating temperature
strains the yeast and could impair fermentation. On the other hand, if the
temperature drops overnight and the bubbling stops, simply move it to a warmer
room and it should pick up again. The yeast does not die, it merely goes
dormant. It should not be heated too quickly as this can thermally shock the
yeast. In summary, if the temperature deviates too much or goes above 80F the
fermentation can be affected, which then affects the flavor. If it goes too
low, the ale yeast will go into hibernation.
The fermentation process can be very
vigorous or slow; either is fine. The secret is in providing enough active
yeast. Fermentation time is a sum of several variables with the most
significant probably being temperature. It is very common for an ale with an
active ferment to be done in a short time. It could last a few days, a week,
maybe longer. Any of the above is acceptable. Three days at 70F may be
regarded as typical for the simple ale being described here.
If the fermentation is so vigorous that the
foam pops the airlock out of the lid, just rinse it out with bleach water and
wipe off the lid before replacing it. Contamination is not a big problem at
this point. With so much coming out of the fermenter, not much gets in. Once
the bubbling slows down however, do not open the lid to peek. The beer is
still susceptible to infections, particularly anaerobic ones like Lacto
Bacillus, found in your mouth. It will do just fine if left alone for a
minimum of two weeks.
The fermentation of malt sugars into beer
is a complicated biochemical process. It is more than just attenuation, which
can be regarded as the primary activity. Total fermentation is better defined
as two phases, the Primary or Attenuative phase and a Secondary or
Conditioning phase. The yeast do not end Phase 1 before beginning Phase 2, the
processes occur in parallel, but the conditioning processes occur more slowly.
This is why beer (and wine) improves with age. Tasting the beer at bottling
time will show rough edges that will disappear after a few weeks in the
bottle. Because the conditioning process is a function of the yeast, it
follows that the greater yeast mass in the fermenter is more effective at
conditioning the beer than the smaller amount of suspended yeast in the
bottle. Leaving the beer in the fermenter for a total of two or even three
weeks will go a long way to improving the final beer. This will also allow
time for more sediment to settle out before bottling, resulting in a clearer
beer.
Use of Secondary Fermenters
(Optional)
Using a two stage fermentation requires a
good understanding of the fermentation process. At any time, racking the beer
can adversely affect it because of potential oxygen exposure and contamination
risk. Racking the beer before the Primary fermentation phase has completed can
result in a stuck or incomplete fermentation and too high a final gravity.
Simple extract ales do not need to be racked to a secondary fermenter. It can
improve clarity and aspects of the flavor, but wait until the second or third
beer when you have more experience with the brewing processes.
The reason for racking to a Secondary
Fermenter is to prevent a yeast breakdown called autolysis, and the resulting
bad taste imparted to the beer. This will not be a problem for these
relatively short fermentation-time ale beers. Other beer types, like Lagers
and some high-gravity beer styles, need to be racked to a secondary because
these sit on the yeast for a longer period of time.
The following is a general schedule for a
simple ale beer using a secondary fermenter. Allow the Primary Fermentation
stage to wind down. This will be 3-4 days after pitching when the bubbling
rate drops off dramatically to about 1-5 per minute. Using a sanitized siphon
(no sucking!), rack the beer off the trub into a another clean fermenter and
affix an airlock. The beer should still be fairly cloudy with suspended yeast.
Racking from the primary may be done at any time after primary fermentation
has more-or-less completed.(Although if it has been more than two weeks, you
may as well bottle.) Most brewers will notice a brief increase in activity
after racking, but then all activity may cease. This is very normal.
Fermentation (Conditioning) is still taking place, so just leave it alone. A
minimum useful time in the secondary fermenter is two weeks. Overly long times
in the secondary (for ales- more than 6 weeks) may require the addition of
fresh yeast at bottling time for good carbonation. This is usually not a
concern.
A Word About
Hydrometers
A hydrometer measures the relative specific
gravity between pure water and water with sugar dissolved in it. The
hydrometer is used to gauge fermentation by measuring one aspect of it,
attenuation. Attenuation is the conversion of sugar to ethanol by the yeast.
Water has a specific gravity of 1.000. Beers typically have a final gravity
between 1.015 and 1.005. Champagnes and meads can have gravities less than
1.000, because of the large percentage of ethyl alcohol, which is less than 1.
By the way, hydrometer readings are standardized to 59F, since liquid gravity
(density) is dependent on temperature. Temperature correction tables are
usually sold with a hydrometer or are available from Chemistry Handbooks (ex.
CRCs). Here is a short table of corrections:
50F => -.0006
55F => -.0003
59F => 0
65F => +.0006
70F => +.0012
75F => +.0018
80F => +.0026
85F => +.0033
A hydrometer is a useful tool in the hands
of an experienced brewer who knows what he wants to measure. Various books or
recipes may give Original and/or Final Gravities (OG and FG) of a beer to
assist the brewer in the evaluation of his success. For an average beer yeast,
a rule of thumb is that the FG should be about one forth of the OG. For
example, a common beer OG of 1.040 should finish about 1.010 (or lower). A
couple points either way is typical scatter.
It needs to be emphasized that the stated
FG of a recipe is not the goal. The goal is to make a good tasting beer. The
hydrometer should be regarded as only one tool available to the brewer as a
means to gauge the fermentation progress. The brewer should only be concerned
about a high hydrometer reading when primary fermentation has apparently ended
and the reading is about one half of the OG, instead of the nominal one forth.
Incidentally, if this situation occurs, two remedies are possible. The first
is to agitate or swirl the fermenter to rouse the yeastbed from the bottom.
The fermenter should remain closed with no aeration. The goal is to re-suspend
the yeast so they can get back to work. The alternative is to pitch some fresh
yeast.
Hydrometers are necessary when making beer
from scratch (all-grain brewing) or when designing recipes. But the first-time
brewer using known quantities of extracts simply does not need one.
Priming &
Bottling
This ale beer will be ready to bottle in
two weeks when primary fermentation has completely stopped. There should be
few, if any, bubbles in the airlock. The flavor wont improve by bottling
any earlier. Some books recommend bottling after the bubbling stops or in
about 1 week. It is not uncommon for fermentation to stop after 3-4 days and
begin again a few days later. If the beer is bottled too soon, the beer will
be over-carbonated and the pressure may exceed the bottle strength. Exploding
bottles are a disaster.
After the bottles have been cleaned with a
brush, rinse them with sanitization solution or run in the dishwasher with the
heat on to sanitize. If using bleach solution, allow to drain upside down in
the six-pack holders or on a rack. Do not rinse out with tap water unless it
has been boiled. (Rinsing should not be necessary.) Also sanitize priming
container, siphon unit, stirring spoon and bottle caps. But do not heat the
bottle caps, as this may ruin the gaskets or tarnish them.
Boil ¾ cup of corn sugar or 1 and ¼ cup
Dry Malt Extract in some water and let it cool. Here are two methods of
Priming:
1. Pour this into the sanitized Bottling
Bucket. Using your sanitized siphon unit transfer the beer into the
sanitized bottling bucket. Place the outlet beneath the surface of the
priming solution. Do not allow the beer to splash as you dont want to add
oxygen to your beer at this point. Keep the intake end of the racking tube
an inch off the bottom of the fermenter to leave the yeast and sediment
behind. See Note on Siphoning.
2. Opening the fermenter, gently pour the
priming solution into the beer. Stir the beer gently with the sanitized
paddle, trying to mix it in evenly while being careful not to stir up the
sediment. Wait a half hour for the sediment to settle back down and to allow
more diffusion of the priming solution to take place. Then siphon to your
bottles.
Note on Siphoning: Do not suck on the hose
to start the siphon. This will contaminate the hose with Lacto Bacillus
bacteria from your mouth. Fill the hose with sanitizing solution prior to
putting it into the beer. Keep the end pinched or otherwise closed to prevent
the solution from draining out. Place the outlet into another container and
release the flow; the draining solution will start the siphon. Once the siphon
is started, transfer it to wherever.
Some books recommend 1 tsp. sugar per
bottle for priming. This is not recommended because it is time consuming and
not precise. Bottles may carbonate unevenly and explode.
Place the fill tube of the siphon unit or
bottling bucket at the bottom of the bottle. Fill slowly at first to prevent
gurgling and keep the fill tube below the waterline to prevent aeration. Fill
to about ¾ inch from the top of the bottles. Place a sanitized cap on the
bottle and cap. Inspect every bottle to make sure the cap is secure. Age the
capped bottles at room temperature for two weeks, out of direct sunlight.
Aging up to two months will improve the flavor considerably, but one week will
do the job of carbonation for the impatient.
It is not necessary to store the beer cool,
room temperature is fine. It will keep for several months. When cooled prior
to serving, some batches will exhibit chill haze. It is caused by proteins
left over from the initial cold break. It is nothing to worry about.
Some Things to Watch out
for:
Contamination of beer can happen at any
stage of the brewing process. Some are not readily apparent. But any problem
that can be easily drank will not cause physical harm. A few infections that
may cause severe gastric distress will first be noted by their appalling
smell. Here are some warning signs:
Mold floating on top of the fermenting
beer. Toss it.
The beer has slimy strands in it. This is a
sure sign of Lacto infection. Toss it.
The bottled beer has a milky layer at the
top and/or small residue bumps clinging to the sides of the bottle neck in the
airspace. This is a micro-derm infection. The beer will smell rotten and taste
nasty. Do not confuse this with the dew that condenses near the bottle cap;
the dew is normal. Also, Priming with DME will leave a protein ring around the
top of the bottle, just like what is left on the sides of the fermenter. This
is also normal.
The bottled beer has a very sweet smell,
like molasses. This is a sign of an Aceto (acetic) infection. The beer is on
its way to turning into malt vinegar. Malt vinegar is good, but not what was
intended.
The bottled beers are getting worse with
time, a stale, cardboard-like or sherry-like flavor is becoming noticeable.
This is a symptom of oxidation. Drink the beers sooner and try to avoid
splashing the hot wort next time.
A skunk-like or cat-musk smell. The beer is
light struck. Always store beer in a dark or shaded area.
This
document is intended to be distributed freely and may be copied for personal
use. Copyright © 1994 by John J. Palmer All Rights Reserved.
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