What to do if wine turns sour

Wine is a very popular drink in our daily life. It is an alcoholic drink, but the alcohol content is very low. It mainly has a very strong grape flavor, which leaves a lingering fragrance between the lips and teeth after drinking. Although wine tastes good, its shelf life is not longer than that of liquor. Therefore, wine often expires. Let’s take a look at what to do if wine turns sour?

1. Why is homemade wine sour ?

The question of why homemade wine turns sour can be explained from two aspects: grape raw materials and winemaking process. (1) Grape raw materials

If the sugar content of the grapes used for homemade brewing is not enough and the added sugar is not enough, the sour taste cannot be balanced, which will make the taster feel that the sour taste is very prominent.

(2) Brewing process

If the timing and fermentation conditions are not paid attention to during the winemaking process, the wine will be infected with inappropriate acetic acid bacteria, thus producing a large amount of acid.

2. Who are you, acetic acid bacteria?

Alcohol will not spontaneously turn into vinegar under normal conditions, but a chemical reaction will occur in the presence of acetic acid bacteria.

Acetobacter, also known as Acetobacter, works in the following ways: when there is sufficient sugar, it can directly convert glucose into acetic acid; if there is insufficient sugar, it will first convert ethanol into acetaldehyde, and then convert acetaldehyde into acetic acid; when there is sufficient oxygen, acetic acid bacteria can oxidize alcohol into acetic acid, thereby turning wine into grape vinegar.

3. What should I do if my homemade wine has turned sour during the fermentation process?

First, you can filter the residue to slow down the fermentation speed, and then kill the fermentation bacteria through fumigation at high temperature. At the same time, you can add some rock sugar to sweeten it according to your taste. Take the wine out of the pot and let it cool without stirring it as much as possible. The wine will now be more mellow.

4. If the grape vinegar is made , learn to enjoy it !

If your homemade wine has no aroma at all and only sourness remains, then try to learn to enjoy it! Compared with wine, the nutritional elements of grape vinegar are not much inferior. Even if the flavor elements of wine that is more like grape vinegar are not so ideal, this highly acidic wine also has certain benefits to the human body. For example, it can soften blood vessels and reduce acidity in the body. At the same time, it is also a very good seasoning. Of course, if mold has grown in the wine bottle, it is best to scrap it immediately.