Generally speaking, wine fermentation takes about 10- 15 days, but the specific fermentation time will be affected by factors such as temperature, yeast species and grape species. During the fermentation process, yeast will convert the sugar in grapes into alcohol and carbon dioxide, so bubbles can be seen. When the fermentation is completed, the yeast will settle to the bottom of the container, and the grape skin residue should float on the wine surface.
If the grape skin does not float, it may be due to incomplete fermentation or other problems, such as infection with miscellaneous bacteria. In order to ensure the quality and safety of wine, it is suggested that you check the state of wine in the container in time and take necessary measures.
First of all, you can check the sealing condition of the container to ensure that no air enters the container, which may cause the yeast to continue to ferment.
Secondly, you can observe the smell and taste of wine to see if there is any peculiar smell or abnormal taste. If there is peculiar smell or abnormal taste, it may be caused by incomplete fermentation or mixed bacteria infection. In this case, it is suggested that you pour the wine into another clean container in time and restart the fermentation process.
Finally, if the color of the wine is not clear, it may be because the grape skin residue has not completely settled to the bottom of the container. In this case, you can gently pour the wine into another clean container, let the skin residue settle for a while and then pour it back into the container.
In short, in the process of homemade wine, we should pay close attention to the state and changes of wine and take necessary measures in time to ensure the quality and safety of wine. If you have any questions about the production process of wine, it is recommended to consult professionals or refer to related books.