Mold in my new vinegar batch [duplicate]

I found this mold in my new vinegar batch. It has grown in the second refill of alcoholic soda when the mother of vinegar was already formed. Does anyone know why this mold has come out in the vinegar? Thank you for your help..

vinegar mold

Best Answer

Probably the pH was not low enough and/or the sugar content was too high. The recommended way to make vinegar has 2 steps:

turning the sugars into alcohol through yeast: this is an anaerobic process, so mold should not be a problem (mold needs oxygen) if you install the airlock properly (note: the link above does not mention the airlock, but I highly recommend it, this video explains why)
turning the alcohol into vinegar: at this point there should not be any sugar left in the liquid, otherwise at the start when the pH is not low enough, molds can form. This is an aerobic process because the acetic acid bacteria need oxygen

There is one more reason to use this process: if you do not have a separate step for the alcoholic fermentation, you will never know, when it is finished. If you bottle an unfinished batch, the alcoholic fermentation might continue, causing the bottle to explode (you could injure yourself). This should not be the case for unfinished vinegar fermentation, because the AAB run out of oxygen.

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Why did my vinegar mold?

The normal vinegar concentration (usually around 5% acetic acid) is too acidic for mold to grow in the vinegar itself to grow mold in the vinegar itself to grow mold in the vine Mold can grow on the vinegar's surface as well as on the bottle. It's not harmful and can be wiped or skimmed away.

Does vinegar grow mold?

Yes! Household white vinegar contains between 5 and 8 percent acetic acid. Acetic acid has a pH of around 2.5 that can disrupt the growth of a range of microorganisms.

Is vinegar mother mold?

Mother of vinegar is a colony of bacteria (don't gasp). These are the good bacteria called Acetobacter. They perform the same purpose for making vinegar as yeast does to make wine. They form the mother on the surface since they require oxygen to convert wine to vinegar and the surface is where the air is at.

How do you keep homemade vinegar from molding?

Mold will ruin your ACV. To keep the scraps submerged, use a glass weight. Use a folded paper towel or coffee filter to cover the opening of your jar. You want air flow to encourage bacteria growth, so its important not to cover the jar with a lid.

Does Vinegar Kill Mold? Watch This Before You Use It...

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

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