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Vinegar from Worldwide industrial practice, from the 20th century
Submerged fermentation vinegar (acetator)
Most industrial vinegar today is made in a stirred stainless-steel tank, the acetator, where a turbine blows very fine air bubbles through wine, cider, beer or dilute spirit. Acetic bacteria float freely in the liquid and turn ethanol into acetic acid in about a day per cycle. Part of each batch is drawn off and the rest seeds the next fresh load.
No fixed amounts recordedSemi-continuous cycles in an 8 L pilot Frings acetator (Román-Camacho et al. 2022); the review gives industrial acetator volumes of 20,000–100,000 L [trends2023].
Alcoholic medium (wine, beer, fruit wine or dilute spirit)
Loaded so that ethanol does not exceed a preset level, 5 % (v/v) in one pilot plant[trends2023]
Vinegar left in the tank from the previous cycle
The unloaded half is replaced and the rest acts as the inoculum[trends2023][rc2022]
Starter
vinegar left from the previous cycle, used as the inoculum of the next
Total time across the recorded steps: 24 h – 27 h
Start
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What changes:Wine or beer is thinned with water to about 10 percent alcohol before it goes in
Step 1 of 4
Dilute the wine or beer with water to the working strength
Time
Not documented
Temperature
Not documented
Salt
None given
Acidity
Not documented
Which microbes the steps name, step by step
K. europaeus
Komagataeibacter
Gluconacetobacter
Output: medium at about 10 % ethanol.
Flavour
Not documented
Texture
Not documented
Colour
Not documented
Microbes at work in this step
Not documented for this step.
Method
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
At a glance
Most industrial vinegar today is made in a stirred stainless-steel tank, the acetator, where a turbine blows very fine air bubbles through wine, cider, beer or dilute spirit. Acetic bacteria float freely in the liquid and turn ethanol into acetic acid in about a day per cycle. Part of each batch is drawn off and the rest seeds the next fresh load. Made in 4 steps over 24 h – 27 h. The longest step, acetify with fine air bubbles at constant temperature, takes 21–24 h (Román-Camacho J.J 2022) and runs at 30–31 °C (Román-Camacho J.J 2023). Komagataeibacter europaeus and Other Komagataeibacter and former Gluconacetobacter species, tolerant of 15–20 % acetic acid do most of the fermenting.
Instead of a mother film on still wine (Orléans) or bacteria fixed on wood shavings (quick process), the bacteria float in the liquid and are fed air as fine bubbles, so a cycle takes about a day [rc2022, trends2023]. The product is high in acetic acid but makes few other metabolites and loses volatile aromas [mas2014].
In the 20th century the invention of submerged fermentation cut vinegar production times to 1-2 days and allowed cheap vinegar to be made around the world [WP:Vinegar]. Early containers for submerged culture were made of wood; most current ones are stainless steel [mas2014].