Once withdrawal reaches 100%, the character will lose the addiction. Recovery can be monitored by checking the "Health" tab. Abstinence will cause the colonist to enter a withdrawal period that adds a negative thought with a -35 mood penalty which is necessary if intending to cure the addiction. The colonist will consume beer when the bar is low enough. Once a colonist develops Alcohol addiction, a new bar called "Alcohol" will appear in their "Needs" tab.
If the room temperature falls between 1☌ (33.8 ☏) to 7☌ (44.6 ☏) it will halt the fermentation process, while temperatures above 32☌ or below 1☌ it will spoil the entire batch instantly, wasting the whole product and all the previous work. The room hosting the barrels must be kept between 7 ☌ (44.6 ☏) and 32 ☌ (89.6 ☏). The difficulty of this depends greatly on your biome's weather conditions and following temperature requirement: Partial loads of wort are possible but less efficient.