Beer - How Stuff Works

Package Facility.

After germination, the barley is dried, the more the barley dried, the darker roaster beer taste.

Malt

The malty grain in the ground would be milled to be the powder which mixed with the water
and heated. The enzyme from the malt breaks down the available starches produced the
multiple sugars.

The resulting liquid is called the Wort.
This mixture put into the vessel called Lauter Tun where the wort is separated from the grain.

Wort :

(1) a sweet liquid drained from mash and fermented to make beer and whiskey. 
      Merriam Webster Dictionary.
(2) The liquid extracted from the mashing process during the brewing of beer or whiskey.
      Wort contains the sugars that will be fermented by the brewing yeast to produce alcohol.
      Wikipedia.

Lauter Tun :

A lautering tun is the traditional vessel used for separation of the extracted wort. While the
basic principle of its operation has remained the same since its first use. The lauter tun is the most widely employed wort separation vessel system in North America and Europe. Lauter tuns are, in general, designed much like infusion mash tuns, but they are wider and shallower.

Like the mash tun, filtering is through slots in a false bottom that supports the grain bed. However, there are some big difference between mash tuns and lauter tuns. Lauter tuns are suited for use of under-modified malts and high adjunct rates. However, if the recipe has less then 50% malt, there will be insufficient husk material to form an adequate filter bed (15). The grists used in a lauter tun are finer, the mashes are more dilute, and the bed depth shallower all of which helps in extract performance.

The wort is boiled with hot to provide the unique aroma.

After cooling, the yeast is added to start the fermentation stage. This process converts the
sugar into carbon dioxide and alcohol giving the beer carbonation and alcohol contain.
Fermentation is the last of producing the beer.

Molecule of the glucose or the sugar enters the yeast through the diffusion. This process is
called Fermentation.

The yeast breaks down the glucose molecule and resupplied the energy back to the yeast
itself allowing them to continue to reporduce and convert the rest of the glucose molecule into
carbon dioxide ethanol, the alcohol in beer.

Brewery Plant.

The candle used to check the color and clarity of the beer.

Hops

The hops will give the beer unique aromatic flavor.

Foam is the important factor of the beer.