Sweet rice wine turns sour may be due to two reasons: one is improper management during the brewing process, and the other is due to improper preservation methods.
1, sweet rice wine is steamed to half-cooked glutinous rice, evenly mixed into the sweet liquor quartz sealed fermentation formation, sweet rice wine brewing to go through two processes: one is the saccharification process, the starch decomposition into glucose; the second is the liquefaction process, the glucose decomposition into ethanol and water. As we all know, the wine song contains yeast, but in fact, it also contains a kind of fungus, rhizobium, and the yeast and rhizobium work in synergy in order to brew delicious sweet rice wine. Sweet wine brewing process, first by the root molds work, root molds rapid reproduction of the amylase enzyme produced by the glutinous rice can be broken down into starch glucose, and the process of saccharification; the next job will be given to the yeast, the glucose generated and then broken down into alcohol (ethanol) and water, and the wine process. The entire process of root molds and yeast must be the appropriate ratio, root molds too much or too exuberant reproduction will make the rice wine grow white hairs, that is, the mycelium of the root molds; too much oxygen will interfere with the alcoholic process of rice wine, so that glucose decomposition into carbon dioxide and water, the alcohol will be oxidized into acetic acid, which is the reason why the rice wine becomes acidic.
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2, sweet rice wine after brewing should also be properly stored, a little carelessness will make the sweet rice wine sour. Sweet rice wine is usually to be packed into containers sealed in a ventilated and cool place; sealing is not good plus storage time is too long, some of the corruption type of bacterial reproduction, in the wine to produce lactic acid, acetic acid or citric acid and other organic acids, will also lead to sweet rice wine becomes sour. Sweet rice wine becomes acidic, do not eat again, otherwise it will affect the health, I suggest sweet rice wine is best to be consumed within 3 to 4 days.
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What to do if the rice wine is sour
The fact that the rice wine is sour means that the production steps are somewhat incorrect, and the fermentation process produces some acid, which is not good for the human body, so the rice wine is not to be drunk. In the process of making rice wine, if the steamed glutinous rice is still hot and added wine, it will cause the wine to deteriorate, and the rice wine will be sour, and may also be stinky. In addition, if the jar in which the rice wine is stored is not tightly sealed, it will also cause the rice wine to become sour. When making rice wine, you must be more cautious, every step should be in accordance with the requirements, can not be too anxious, otherwise it will not do well.
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Can you drink glutinous rice wine when it turns sour
Glutinous rice wine turns sour because when it is placed for a long time, some decaying bacteria multiply, and eventually organic acids such as lactic acid, acetic acid, or citric acid are produced within the wine. So it will feel sour when you drink it. Glutinous rice wine turns sour because of incorrect preservation methods. Usually, glutinous rice wine is stored in containers in a ventilated and cool place. If it becomes sour for a long time, you can't consume it, otherwise it will affect your health. It is recommended that the brewed glutinous rice wine should be consumed within 3~4 days.