How To Stop Wine Fermentation? (Solution)

In order to stop the wine fermentation, you simply add extra alcohol to the wine. Choose what alcohol you will use to add to the wine. A grape distillate is the preferred option but you can also add in either vodka or brandy. Remove all the sediment from the wine by racking the wine into a sterilized container.


How do I stop my wine fermenting?

1. Stopping the Fermentation with Cold Shock

  1. Place the wine in a very cold room or in a refrigerator, at 36-50 degrees Fahrenheit, for 3-5 days.
  2. During this time the fermentation will completely stop and the yeast will precipitate.
  3. Remove the sediment by racking the wine into another sterilized demijohn.

How do you kill yeast in wine?

This can be achieved by dropping fermentation temperatures to the point where the yeast are inactive, sterile filtering the wine to remove the yeast or fortification with brandy or neutral spirits to kill off the yeast cells.

Can you stop fermentation early?

A: The best way I know of to stop an ale fermentation is to crash cool the beer; that is, chill it to 32 °F (0 °C) as quickly as possible. This method will stop most ale yeast in their tracks, and it usually works on lager yeast too, if you do it quickly enough.

Can I use Campden tablets to stop fermentation?

Truth is, Campden tablets are not designed to stop a fermentation and never have been. Using them for that purpose can get you into all kinds of trouble. There is really no ingredient that can be safely used by itself to assuredly stop a fermentation.

How do you stabilize wine naturally?

Add 1/4 teaspoon of potassium metabisulfite AND 3.75 teaspoons of potassium sorbate (also called Sorbistat-K) into that water; stir until fully dissolved. Both powders should dissolve into pure, clear liquid. Gently add this water/liquid into your five gallons of wine and stir gently for about a minute.

How do you stop wine fermenting early?

Chill Down The Fermenting Wine: The cooler the better, but 50°F. is sufficient. This will stop the wine fermentation, and the wine yeast will slowly begin to settle to the bottom. You may also want to add bentonite while chilling the wine to help the wine yeast clear out faster and more thoroughly.

Can you drink wine that is still fermenting?

Yes. You can even drink wine during fermentation.

Does wine continue to ferment in bottle?

Answer: Yes. Some of it does intentionally, like Pét-Nat. These wines are bottled while fermentation is still going on, which makes them fizzy and delightful.

How do I know if I killed my yeast?

After 10 minutes, the yeast should be foamy and bubbly and expanding. It should have expanded to fill over half of the cup/jar and have a distinct yeasty smell. This is yeast that is alive and well. If the yeast doesn’t bubble, foam or react – it is dead.

At what temperature does wine fermentation stop?

According to Daniel Pambianchi’s Techniques in Home Winemaking, 23 to28 °F (-5 to -2 °C) is the ideal temperature range to quickly stop fermentation, but temperatures up to 40 °F (4 °C) will do the trick. The warmer the temperature, the longer the process will take.

Does refrigeration stop fermentation?

Homebrewers can stop fermentation in beer by chilling it to refrigerator temperatures, filtering out the yeast, pasteurizing it, or adding Potassium sorbate.

Should I stir my wine during primary fermentation?

It is important to stir the ‘must’ during the primary fermentation. The yeast requires a good supply of oxygen during this ‘aerobic’ fermentation, meaning with air. It also helps keep the fruit in solution if you are fermenting on the fruit, grapes, or whatever kind of fruit. You don’t want a solid cap forming on top.

How much yeast do you put in a gallon of wine?

Typical usage rate for yeast is 1 gm / gallon of juice, but being a little short or a little long is not a problem, as yeast reproduces to reach a number at which fermentation takes place. Being slightly long on usage amount simply gets the fermentation count up that much faster.

Can you make wine without Campden tablets?

You do need to use Campden tablets or some other form of sulfite such as sodium metabisulfite, or the wine could eventually spoil or turn to vinegar. If you’re making wine from fresh fruit, we recommend that you add one Campden tablet per gallon before the fermentation.

What is the purpose of Campden tablets in wine making?

Initially, Campden Tablets are used to kill off any potentially harmful bacteria that may may be present in the base ingredients used in winemaking, and to discourage any wild yeast from gaining a foothold. Campden will not kill yeast, but it creates an environment inhospitable to them.

Stopping Fermentation

Following the onset of fermentation, it might be impossible to control the stopping point, and in most circumstances you will not want to do so. When your wine is entirely dry and there is no more residual sugar for the yeast to feed on, a successful fermentation will come to a natural conclusion. If you’re looking for a dry wine, this is ideal. However, there may be occasions when you wish to shorten the fermentation process in order to produce an off-dry wine, dessert wine, or aperitif. The most fundamental method of stopping fermentation is to add sulfite to the wine and chill it down to near freezing temperatures (which for a wine with a 13 percent alcohol by volume is around 22 °F/-6 °C) for a lengthy period of time.

When it comes to stopping an active fermentation at room temperature, the amount of sulfite necessary varies depending on the active yeast population.

Keep in mind that once the wine has been sulfited, it must be chilled.

The yeast population will be significantly reduced as a result of this addition.

  • After adding this ingredient, refrigerate your wine immediately and allow it to sit for at least 24 hours to guarantee that the treatment has been totally successful, according to the manufacturer.
  • The procedure will take longer to complete the higher the temperature is.
  • When the Brix is still one or two degrees higher than intended, sulfite your wine and store it in a cool area until the Brix is down to the desired level.
  • A fine grade of filtration should be used after that to ensure that as many yeast cells as possible are removed from the wine.
  • It is true that potassium sorbate does not destroy yeast cells directly, but it does hinder them from multiplying.
  • Yeast cells are killed by high alcohol concentrations (different strains have different thresholds, but usually 16-18 percent is the peak of what they can stand).
  • Fortified wines require careful preparation ahead of time to get the proper residual sugar and alcohol levels.
  • No matter what approach you choose, if your goal is to halt fermentation in its tracks from the beginning, you may make things simpler on yourself by planning ahead of time.

For example, instead of adding yeast nutrition to your must, you may consider under-pitching your yeast instead. In addition, ferment at the lower end of the prescribed temperature range, which will result in a less vigorous fermentation in the final product.

How To Stop A Wine Fermentation

I’m now fermenting numerous 2 1/2 gallon containers of wine, which I started back in December. The problem is that, while I am happy with the flavor and alcohol content, they will not cease to function as intended. The flavor of the wine has changed in the past when I have left it to cease fermenting on its own, does this make sense? I’ve read that potassium sorbate does not totally eliminate yeast. Is this correct? What can I do to halt the fermentation at this point, and how much alcohol (brandy?) would I need to add to the mixture to stop it from fermenting further?

  1. Skip K.’s full name is Skip K.
  2. As a first point, I’d want to emphasize that halting a wine fermentation is not something that happens very often.
  3. If you like your homemade wines to be sweet, you would add sugar to taste at bottling time and then add potassium sorbate to avoid the possibility of re-fermentation in the wine bottle after the wine is bottled.
  4. It takes anything from 5 days to 2 weeks for a normal wine fermentation to complete.
  5. As a starting point, I recommend that you look at theTop 10 Reasons For Fermentation Failure that are published on our website.
  6. Check to see if any of the top ten reasons apply to your particular scenario.
  7. What can I do to put a stop to the fermentation of wine?
  8. Neither of them will be able to successfully stop a wine fermentation with any consistency.
  • The presence of sulfites (Campden tablets, sodium metabisulfite, potassium metabisulfite) indicates that the wine yeast has been cultivated to be sensitive to sulfites. They are capable of withstanding the quantities of alcohol that are generally present after a dosage has been added to a beverage. A dosage of sulfite can speed the conclusion of a wine fermentation that is already on the point of halting – for whatever cause – but this does not happen in a predictable manner or with predictable results. The addition of sulfur dioxide to an active wine fermentation may cause the process to slow down, maybe even to a crawl, but it will ultimately recover and continue to completion, albeit at a painfully slower rate than before. What occurs is that the sulfite will kill a percentage of the yeast cells, causing the fermentation process to be stunted
  • Nonetheless, the wine yeast will eventually begin to recolonize and complete the work at hand.
  • Incorporating potassium sorbate into a wine fermentation will have no negative impact on the process in any manner. A wine yeast colony’s ability to regenerate will be inhibited by this substance. The potassium sorbate coats the yeast cells, preventing them from reproducing and thus preventing them from spreading. To put it another way, it renders the wine yeast sterile. So potassium sorbate is an excellent component to use in wine that has already been clarified but may still include trace levels of wine yeast in the bottle. In addition, if you sweeten the wine before bottling, the potassium sorbate will prevent any possibility of these few yeast cells growing into large enough numbers to cause a fermentation within the wine bottles.

As you indicated, you might add alcohol to the wine to prevent the fermentation process from continuing. This is referred to as strengthening the wine. However, in order to do this, you would need to raise the alcohol content to around 20%. Typically, brandy is utilized for this purpose. It should be noted that this will have a significant impact on the flavor of the wine. As the amount of alcohol in the wine increases, the fruitiness of the wine will diminish. Suppose you have to stop a wine fermentation in the middle of it because you absolutely, positively, without a doubt, have to, here’s how a winery would go about it:

  1. Reduce the temperature of the fermenting wine: The colder the temperature, the better, although 50°F is acceptable. This will bring the wine fermentation to a halt, and the wine yeast will begin to gently settle to the bottom of the barrel. Adding bentonite while cooling the wine may also be beneficial, as it will aid in the clearing out of the wine yeast more quickly and thoroughly.
  1. Allow for plenty of clarification time in the wine before racking it off the sand or sediment. Although it is technically possible to rack the wine in as little as 5 days, it is preferable to wait a couple of weeks. During this additional period, it is possible that more solids, such as acid crystals, will precipitate out of the wine. That would be a positive development
  1. Pour the Wine Through a Cheesecloth or a Coffee Filter: When I say “filter the wine,” I don’t mean to pour it through a cheesecloth or a coffee filter or anything along those lines. You must be able to pass it through a real wine filter that is fine enough to eliminate any remaining yeast cells before serving it. This entails filtering down to a micron size of.5 microns. A coffee filter can only filter down to roughly 20 to 25 microns in size, depending on the brand. A.5 micron filter pad will eliminate over 99.9 percent of the wine yeast present in a wine and is therefore deemed sterile in this context. Depending on how much tannin is present in the wine, you may need to pass the wine through a more coarse filter pad before continuing with the process. The first step in filtering the wine is to run it through a 1 micron filter pad. After that, I try to run it through a 5 micron filter pad. This almost prevents the possibility of the filter pad being clogged with wine sediments.

The method for stopping wine fermentation has now been revealed. From the standpoint of a single winemaker, I believe that the endeavor is not worth the time and effort. Allowing the wine fermentation to conclude on its own is significantly less work than dealing with the process of changing the sweetness to your satisfaction. Best wishes for your winemaking endeavors.

Ed Kraus- Ed Kraus is a third generation home brewer/winemaker who has been the proprietor of E. C. Kraus since 1999. He grew up in a family of home brewers and winemakers. For more than 25 years, he has been assisting folks in the production of superior wine and beer.

How to Stop Fermentation in Winemaking

Stopping the fermentation process is one of the most difficult challenges in winemaking. Fermentation is brought about by the yeast, which consumes the carbohydrates in the wine and converts them to alcohol as a result of the process. The fermentation process will often come to an end on its own when there is no sugar remaining, resulting in a very dry wine, or when the alcohol content hits 14-18 percent, depending on the yeast strain. While winemaking, the subject of how to halt fermentation arises when the required amount of sweetness has been attained and you want to retain your wine exactly as it is now (without adding any sugar).

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1. Stopping the Fermentation with Cold Shock

As far as I know, this is the only approach that has no effect on the flavor, strength, or scent of the wine you are creating. The procedure is straightforward; essentially, you must reduce your wine to a temperature that causes yeast to cease its activity and precipitate in the bottom of the demijohn. To do so, follow the procedures outlined below:

  • Refrigerate or freeze the wine for 3-5 days at 36-50 degrees Fahrenheit in a very cold environment or in a freezer for longer storage. Maintain constant monitoring of the temperature of the wine if it is stored in a cold warehouse since it is critical that it remains above freezing point. During this time period, the fermentation will come to a full halt and the yeast will precipitate out of solution. If you look at the bottom of the demijohn, you’ll note that there is sediment and that the wine has partially clarified
  • Remove the sediment from the wine by racking it into another demijohn that has been sanitized. The temperature should be kept below 61 degrees Fahrenheit for this process. Pour the wine through a wine filter into another demijohn that has been sanitized
  • Allow the wine to rest at room temperature for at least a week, checking on it everyday throughout that time. Any evidence of fermentation should be followed by a second round of cooking.

However, the disadvantage of this procedure is that part of the yeast can be filtered out of the wine during the racking process, resulting in the fermentation to begin all over again. This may be avoided by adding around 0.14 ounces of sulfur trioxide to each 2.6 gallon batch of wine. These preservatives, on the other hand, will degrade the quality of your wine.

2. Stopping the Fermentation through Pasteurization

Pasteurization is probably the most effective method of killing the wine yeast on the market today. Because yeast generally dies at temperatures over 104 degrees Fahrenheit, it is necessary to raise the temperature of the beverage above that point to cease wine production. The following is an example of how to stop fermentation using this method:

  • Pour the wine into a saucepan that has been sterilized
  • Maintain a temperature of around 158 degrees Fahrenheit for approximately 10-20 minutes after the wine has been heated. In addition to yeast, additional organisms present in the wine will be killed as a result of this procedure. Cool the wine down to 50-61 degrees Fahrenheit as soon as possible
  • Bottle the wine as soon as possible and hermetically seal it

Into a sanitized cooking saucepan, pour the wine The wine should be heated to around 158 degrees Fahrenheit and kept at that temperature for approximately 10-20 minutes. In addition to yeast, additional organisms present in the wine will be killed as a result of this treatment. Reduce the temperature of the wine to 50-61 degrees Fahrenheit as soon as feasible. Immediate bottling and hermetically sealing the wine are required.

3. Stop the Fermentation with Alcohol

In the winemaking industry, this is perhaps the most straightforward method of stopping fermentation. As we previously stated, yeast ceases to work when the concentration of alcohol reaches around 16 percent. Actual alcohol concentrations can range between 14 percent and 18 percent, depending on the yeast type being used. As a result, by merely increasing the amount of alcohol in your wine, you may prevent fermentation. This is how you go about it.

  • Rack the wine into a demijohn that has been sanitized to ensure that all of the sediment has been removed from the wine
  • Increase the amount of alcohol in the wine until it has a concentration of around 16 percent. It is recommended that the alcohol be either grape distillate, vodka, or brandy. Leave the wine in the bottle for another week to observe if any signs of fermentation appear in it. The wine can be racked one more time before bottling if you do not follow these instructions

The disadvantage of this method is that the added alcohol will not only change the flavor of the wine, but it will also give the wine an unpleasant smell if you use vodka as the alcohol. Have you ever tried to stop the fermentation of a wine before? What methodology did you employ?

You can leave a comment below if you have any questions or suggestions about how to stop fermentation in the winemaking process. Is it possible that you are a wine bar or restaurant owner in need of resources? Here are our top tips for putting you in the best possible position for success:

  • Workers’ compensation insurance from Cerity can help you protect your company. Check out this guide to the Wine Business from Forbes. With these delicious wine recipes, you may breathe new life into an old dish.

How does a winemaker stop a fermentation to make an off-dry wine?

Greetings, Dr. Vinny. When a winemaker wants to create an off-dry wine instead of a dry wine, how does he or she stop the fermentation process? — Laura, a tourist from Cancun, Mexico Greetings, Laura Yeasts consume the sugar found in grapes and convert it to alcohol during the fermentation process. At the very least, this is the straightforward explanation: For fermentation, there are many different ways, including whether or not to use commercial yeast or instead rely on local yeasts, how hot or cold to ferment it at, whether or not to do it in a full cluster, and what to do if the fermentation becomes “stuck” or ceases to function on its own.

  • One method is to reduce the temperature, which can either slow down or completely stop the fermentation process.
  • For example, bentonite clay can be added to a wine while it is still in the fermentation process.
  • After that, you may gently rack, or shift, the wine from one container to another, leaving the sediment (and yeast) in the first container.
  • It is possible to slow down the fermentation process with sulfites, and to inhibit the growth of yeast colonies with potassium sorbate.

Here’s How to Stop Fermentation in Winemaking

Before we get into how to stop fermentation during the winemaking process, allow us to tell you about a love tale that is as old as human civilization, if not even older than that. This is a story that began more than 8000 years ago and continues now. Beginning around 6000 BC in Georgia and ancient Persia – which is today’s Iran – wine and humanity began their journey together. That wine, on the other hand, is nothing like the wine that we consume today. Back then, the technology, wine recipes, and wine-making procedures were vastly different from what they are now.

When it comes to crushing the fruit, the human touch is far more important than the practical side of the machine pressing the grapes, which is why human touch is so important.

Today, we have a much greater understanding of the entire process, which allows us to use it appropriately and to our benefit.

This has been the case from the earliest days of preserving wine in amphorae and dark, musty caverns.

Wine cellars and wine storage chambers, on the other hand, are being built more and more these days. They have put in a lot of effort and attention into creating the finest environment possible, complete with no light, optimum temperature, and humidity levels.

Wine Making Process

The first phase in the winemaking process is the harvesting of the grapes, which takes place in the fall. When it comes to wine, there are excellent and terrible seasons. Some sommeliers will claim that a specific year was particularly bad for wine because the harvest did not go according to plan. What is the purpose of making wine from grapes? This is due to the fact that no other fruit reacts to ethanol in the same way that grapes do. They contain the greatest amount of sugar of any of the fruits.

  • Harvesting, on the other hand, entails more than just figuring out the best approach to select the fruit and clean it.
  • Choosing the most appropriate time to harvest is an important element of the harvesting process.
  • Almost everyone in the company has a role in the decision-making process, from harvesters and farmers to members of the public relations and marketing departments.
  • There are a variety of methods for harvesting grapes, but the two most common are mechanized harvesting and manual harvesting.
  • Hand harvesting is preferred by the majority of estates since machines may be harsh and brutal on the grapes, soil, and vineyard.

Crushing and Pressing

Crushing and pressing have been essential parts of the winemaking process since the beginning of time, and for a very long time, there was only one method to go about it. However, as technology has progressed and the means of accomplishing the same task have become more effective, new methods of crushing and pressing have evolved – mechanical presses. Mechanical presses are a more efficient method of harvesting than men and women dancing in barrels during the harvest. Although they lack the human touch when crushing the grapes, this is true of any argument against machines taking over some aspects of our jobs.


In order to comprehend how to halt the fermentation process in winemaking, you must first grasp how fermentation works and what fermentation actually is. As a result, fermentation is the most important phase in the winemaking process. We wouldn’t have any wine, and we wouldn’t have the “glass of wine a day keeps the doctor away” mindset, and we wouldn’t have romantic nights with our partners. Fermentation is responsible for the success of all sommeliers, wine enthusiasts, and vineyard owners.

  1. Briefly stated, fermentation is a process in which change affects the fundamental components – it is a process that derives energy from carbohydrates in the absence of oxygen.
  2. Zymology, also known as Zymurgy, is an applied science that studies fermentation and its applications in everyday life.
  3. When grape juice is left alone for around 12 hours, the fermentation process begins as a result of the naturally occurring yeast that is present in the atmosphere.
  4. Creating a sterile atmosphere can help to drastically decrease any unneeded risks associated with the wine fermentation process.
  5. When fermentation begins, it will continue until all of the sugar has been converted to alcohol.

Climate, humidity, room temperature, and the amount of natural light permitted into the space are all important considerations. All of these factors must be kept under control in order for the fermentation process to go well.


It is first necessary to grasp how fermentation works and what it is in order to comprehend how to halt it in the winemaking process. This means that winemaking revolves around the fermentation process. Without it, there would be no wine, no “a glass of wine a day keeps the doctor away” mentality, and no romantic nights with your sweetheart in a beautiful location. Fermentation is responsible for the success of all sommeliers, wine enthusiasts, and vineyard owners. Chemical changes in organic substances are produced by this metabolic process, which is a chemical reaction.

  • Zymology is the science that underpins it.
  • The effects of yeast and bacteria on food and beverage production, and the best ways to employ them to our benefit — in brewing, winemaking, and fermenting milk.
  • The use of artificial yeast control, which many vineyards employ and profit from, does, however, have certain disadvantages.
  • A controlled environment implies that there are no mistakes or only marginally impossible possibilities for an error to occur, which means that the wine will ferment in the manner in which it is intended to ferment.
  • Depending on the circumstances, we may be talking about anything from one week to more than a month.
  • The regulation of all of these factors is critical to the success of the fermentation process.

Aging and Bottling

We’re getting close to the finish of our road trip. The next process is to store the wine, which includes maturing and bottling. This final stage is semi-optional, and I say that because the winemaker decides whether he wants to bottle the wine immediately or if he wants to let the maturing process to continue for a longer period of time — the decision is entirely up on the winemaker’s discretion. There are many various ways to properly store wine, and the method that is chosen is entirely dependent on the persons who will be storing the wine – mostly on what is most convenient for them.

How to Stop Fermentation in Winemaking

According to the yeast strain, the fermentation process will usually come to an end on its own when there is no sugar remaining, resulting in a dry wine, or when the alcohol content reaches 14-18 percent, whichever comes first.

But, in the case of winemaking, how can one intentionally halt the fermentation process?

Stopping with Cold Shock

For one thing, this procedure, out of all the methods available to stop fermentation, may be the most effective because it has no negative impact on the taste strength and scent of the wine you are creating. The point I’m trying to make is that if you employ this procedure, your wine will just cease fermenting — nothing more, nothing less. The procedure is straightforward: you just chill your wine down to a temperature below which the yeast ceases to operate.


This method is the most effective for eradicating wine yeast while not affecting the taste of the wine itself. In principle, the approach is pretty straightforward: just heat the wine to a temperature high enough to stop the fermentation process. After that, quickly chill it down and seal it. However, because this entire procedure cannot be carried out in an uncontrolled environment, this strategy is difficult to implement. It is quite difficult to maintain a steady high temperature for 15 minutes, and it is even more difficult to accomplish a rapid cooling.

Stop with Alcohol

Adding alcohol to wine to prevent it from fermenting is the most straightforward method of preventing fermentation. When the quantity of alcohol in the air surpasses 14 percent, yeast ceases to function.

Final Thoughts: How to Stop Fermentation in Winemaking

To summarize, the process of fermenting wine is a regular and essential part of the winemaking process; without it, there would be no wine to drink. Fermentation can take anywhere from a week to more than a month, although it can be stopped much sooner than expected by a number of means, including the addition of alcohol, warming, and pasteurization, among others. Numerous explanations may be given for this, but the most common is that winemakers feel that a particular wine should ferment for a specific number of days before being bottled.

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How to Stop Fermentation During Winemaking

The ultimate sweetness or dryness of a wine is determined by how much residual sugar from the grapes is left behind after fermentation has completed. In this section, we’ll go over how this process works as well as how to stop fermentation in the winemaking process. Even in amateur winemaking, it is typically recommended that fermentation be let to reach its natural conclusion by the professionals. Nonetheless, we’ll provide you with numerous options in case you decide to give it a shot.

Fermentation During Winemaking

After being harvested, wine grapes are crushed in order for their juices to be fermented and converted into wine through the fermentation process. Yeasts in themust, which is a newly crushed mixture of grape juices, skins, seeds, and stems, are responsible for this chemical process, which occurs in the wine. It’s possible that the yeasts were wild, airborne yeasts that were naturally associated with the grapes when they were harvested. Yeasts can also be purposely introduced to the winemaking process to enhance the flavor.

  • This ethanol is, of course, the alcohol found in wines.
  • It is the balance of these procedures that determines the final sweetness of the finished product.
  • The image is from of Wikipedia.
  • Wines made from grapes with reduced sugar content will often have lower alcohol level.
  • As the grapes mature on the vine, the sugar content of the grapes increases as well.

This is one of the reasons why the timing of grape harvests is so important. Sugars are lost when crops are harvested too early, and this is a costly mistake. The sugar content of grapes grows as they mature, making the time of the harvest essential in the winemaking process.

The Natural Stopping Point for Fermentation

Fermentation comes to a natural halt at two points in the process. First and foremost, fermentation will come to an end when the grape sugars have been depleted and there is nothing left for the yeast to ferment. At this point, no more alcohol can be produced and the result will be a dry wine with no residual sugars.The second natural stopping point for fermentation occurs when the alcohol content of the wine reaches a level high enough to cause the yeast to be killed. Wild yeasts have varying levels of ability to live in these settings, with certain strains dying off when the alcohol content is less than 10 percent in some cases.

  • The budding yeast Saccharomyces cerevisiae, which is often utilized in winemaking, is examined in further detail.
  • The yeast Saccharomyces cerevisiae is used by the majority of winemakers, and the photo is from ofWikipedia.
  • It is also capable of withstanding rather high quantities of alcohol.
  • It was discovered in the late nineteenth century, and its widespread use in winemaking is a contributing factor to the fact that most wines have an alcohol content of 12-15 percent.
  • Consequently, it is a fantastic match for both fortified wines such as Port and higher ABV wines such as Zinfandels and Syrah.

Other Ways to Stop Fermentation

As previously said, the majority of wine experts would advise you to just allow the fermentation to complete on its own and then alter the sweetness of the wine in another method before bottling the finished product. Even so, if you wish to stop fermentation before the yeast runs out, there are a few options on how to go about it. Some of them we endorse, while others we don’t suggest at all.


Port wines are fortified with brandy to prevent fermentation from taking place. The image is from of Wikipedia. If you weren’t intending on making a fortified wine, this can seem like a bit of a surprise, but the technique is tried and proven. Fortifying your wine is the use of distilled spirits to raise the alcohol content to a level high enough to kill any lingering yeast. Of course, this will have a substantial impact on the flavor and will also result in a large increase in the alcohol content of the finished product.

There are a variety of solutions available for strengthening spirits.

In order to stop the fermentation process in Sherry, they use brandy. You must add the spirit to the fermenting mixture after it has attained the desired amount of sweetness if you want to fortify wine that you have made at home.


Metabisulfite stabilizers are included in the majority of home winemaking kits (Campden tablets, potassium metabisulfite, or sodium metabisulfite, for example). These are meant to function as preservatives by inhibiting the growth of bacteria and wild yeast. A widespread myth is that these substances would completely eliminate all yeast, but this is just not true. However, adding enough sulfites to totally kill them would make the wine unpalatable. In practice, this is not a viable option. Even while the kit doses eradicate the vast majority of the yeast, some always persists.

Potassium Sorbate

To inhibit yeast cells from budding and multiplying, potassium sorbate is coated on the surface of the cells. Essentially, it sterilizes any active yeast that may be present in the culture. So, while it does not prevent fermentation, it can be used in conjunction with metabisulfites to prevent the yeast that survives the sulfites from repopulating your wine. If you increase the amount of sugar you add before bottling, the sugars should be largely safe from further fermentation. It is important to note that just because certain compounds are ineffective at preventing fermentation does not imply that they should not be used.

Simply adjust your expectations as you go along with your tasks.

Chilling and Filtration

The ability to maintain the proper temperature ranges throughout fermentation is vital for keeping the intricacies of a wine’s flavor. Heat accelerates the fermentation reaction; but, if the must becomes too hot, it can harm the final product and cause it to spoil. All of the compounds that contribute to the nuanced scents and tastes that are indicative of the terroir would be lost. Cooler temperatures, on the other hand, have the effect of slowing the fermentation process. If the temperature in the must becomes too low, the fermentation reaction will come to a complete halt.

  1. Ideally, the wine should be chilled to at least 50 degrees Fahrenheit, though colder is preferable.
  2. To speed up this process and clarify the wine, you can add bentonite to the mixture.
  3. This procedure should be allowed to run its course for several weeks to ensure that everything is well understood.
  4. These filters have far smaller holes than cheesecloth or coffee filters, which makes them ideal for use in tight spaces.

Higher capacity filtering systems are often comprised of a number of filters connected in series. They will pass the wine through filters with bigger pores first, followed by filters with smaller pores, in order to avoid blockage.

Do Not Try Pasteurization at Home

We’re hesitant to bring up the subject of pasteurization at all, but we’ve seen it mentioned in other places on the internet. Pasteurization is the process of heating a liquid to extremely high temperatures in order to destroy any bacteria or yeast that may ruin it. While conventional pasteurization has shown to be quite effective in maintaining the safety of commercially produced dairy products, it is not recommended for the production of wine. Yes, that would be effective. You are incorrect, and we will explain you why this is not a good idea.

You would run into the same issues as you would with high fermentation temperatures, but even more of the wine’s flavor would be lost as a result of the higher temps.

While a commercial winery may be able to maintain that degree of temperature control, it is doubtful that a home winemaker will be able to achieve the same results.

A Few Final Words

If you’re making wine at home, the best advise we can give you is to just wait for the fermentation to finish on its own. As you can see from the examples above, all of these procedures are time-consuming and, to be honest, are probably not worth the effort. If your wine is too dry for your liking, you can wait and sweeten it before bottling it instead of bottling it. It takes considerably less effort (and creates far less mess!) to adjust everything in the end. In addition, you’ll be less likely to accidently ruin the finished result.

Check out our top guidelines for home winemakers for more information.

How to Stop Wine Fermentation

The need to expedite the preparation process or to maintain the present features of the beverage may necessitate the need to halt fermentation before all sugar has been converted to alcohol or before the wine has achieved its maximum potency (natural causes of stopping) (sweetness and strength). In the case of home winemaking, three techniques of fermentation halting are employed, each of which is applicable for all varieties of wine (grape, apple, cherry, etc.): 1. Securing with a drink of alcohol.

  • When the strength of the wine is more than 14-16 percent, the wine yeasts cease to function (some artificially bred strains are active at a concentration of alcohol up to 18 percent , but these are rare cases).
  • As long as the starting sugar concentration of the substance is unknown, it will be impossible to assess the unstrained potency that has been obtained by fermentation.
  • Flaws include: the wine becomes quite powerful, its flavor alters, and the vodka may impart an unpleasant odor.
  • Using chilling to put a stop to the fermentation.
  • It is also the most expensive.
  • The wine should be kept in a cool chamber with temperatures ranging from 36-50°F/2 to 10°C (necessarily above freezing point) for 3-5 days to ensure complete cessation of fermentation and precipitation, as well as at least a partial clarity of the must, before bottling.
  • Deficiencies: There is no guarantee that all of the yeasts will be filtered out with the sediment in this method.

It is necessary to add sulfurtrioxide (0.11-0.14oz / 3-4 grams per 2.5 gal/10-litre container), as well as an acid such as sorbic acid, in order to prevent this from occuring (according to the instruction).


When the temperature exceeds 104F° / 40°C, wine yeasts will die.

Traditionally, the wine that has been removed from the sediment is heated to 131-158F° / 55-70°C (pasteurized) in order to eliminate not only yeasts, but also other potentially harmful organisms (mold fungi, viruses, and so on) that can survive in more extreme conditions.

After that, the wine is pasteurized for 10-20 minutes, cooled down to 50-61F° / 10-16°C air tight (which is difficult to achieve at home), bottled for storage, and hermetically sealed to preserve its freshness and flavor.

It is necessary to protect the wine from contact with the outside environment in order to avoid later contamination from occurring. Because of this, the pasteurization becomes less effective if you do not perform it.

How to Stop a Fermentation

Jill Misterka contributed to this article. Most people who wish to stop the fermentation do so because they want the wine to retain some residual sugar, resulting in a sweet or at the very least off-dry flavor profile. One significant reason why all winemakers should be interested in halting fermentations is safety. The necessity to avoid bottled wine from resuming fermentation and popping its corks or exploding is one of the most compelling reasons to stop fermentation. It follows that a genuine interest in knowing “How do you stop a wine’s fermentation?” entails more than simply wanting to know how to eliminate the visible signs of ferment activity such as bubbling, fizzing noises and the development of a cap, lees, and a decrease in the wine’s Brix/specific gravity.

Fermenting to dryness

When it comes to making wine, some winemakers prefer a dry wine from the start, but those who like a sweeter wine typically allow the wine to mature to dryness and then add extra sugar afterward, a process known as back sweetening. But how can you tell when the wine has reached its peak? Most winemakers would respond with a precise Brix or specific gravity value recorded with a hydrometer, because taste is not a trustworthy indication (strong tannins or acidity may disguise sweetness on the tongue).

  • Because of the diametrically opposed effects of alcohol and the other components listed on density, as well as the fact that the proportions of alcohol and non-fermentable components vary from wine to wine, a hydrometer cannot reliably measure small amounts of sugar or detect total dryness.
  • However, because Clinitest tablets are capable of detecting even the smallest quantities of non-fermentable sugars contained in wine, a sugar content of less than 0.5 percent sugar is a fair estimate of the wine’s dryness.
  • Without sugar to feed on, the surviving yeast cells go into dormancy—that is, they become inactive but still alive—for an extended length of time, perhaps for a long period of time.
  • But what if the wine is bone dry and you intend to leave it that way?
  • While it is still necessary to disinfect any equipment that the dry wine comes into touch with (particularly bottling hoses), doing so before using that equipment with sweeter wines will prevent the sweeter wines from becoming contaminated with yeast and becoming re-fermented.
  • Even though re-fementations in dry wines are rare, they can occur.

When they do, they generally result in some effervescence and ugly sediment, but happily no blown corks. The final conclusion is that fermenting to dryness, whether with or without back sweetening, does not result in the elimination of all yeast.

Cold stabilizing

Placing wine carboys in a cool (28-36° F) atmosphere for three weeks or longer helps extra tartaric acid drop out, ensuring that it does not do so later in the bottle when chilled once fermentation is completed. Some winemakers believe that this technique also prevents fermentation from taking place. Despite the fact that fermentation is momentarily halted, the temperature range utilized for cold stabilization does not always kill all of the yeast because certain strains are extremely cold resistant.

Even if the bottles do not burst, why risk the danger that the corks will come loose, enabling the wine to bubble and wasting all of your hard work?

Adding sulfite

The use of sulfite (potassium metabisulfite or sodium metabisulfite) will stop the fermentation of wine, correct or incorrect? False is the response to the question. Make that a lot of the time untrue. In the past, winemakers had to rely on the wild yeast that naturally grew on the grapes to ferment their wines, and many wild yeast strains are unable to withstand the addition of sulfite during the fermentation process. That is most likely why the myth that sulfite prevents fermentation in amateur winemaking has become entrenched in popular culture.

Because the sulfite additives were designed to kill mold, bacteria, and wild yeasts, this was done on purpose to ensure that the yeast would be able to survive.

You could use a very high quantity of sulfite in the hopes of killing off all the yeast, and it would probably work, but the wine would be ruined since it would smell and taste like sulfite for the rest of its life.

So far, we have a perfect batting average in our pursuit of zero yeast.

Fortifying with alcohol

It is particularly efficient in halting fermentation when a distilled spirit such as brandy is added in sufficient quantities to raise the alcohol by volume to at least 20 percent (ABV). For the simple reason that yeast does not produce alcohol on purpose; rather, it is a waste product that they can only tolerate in small quantities before it kills them by weakening their cell walls, this is the case. However, fortification cannot be utilized in the production of regular wines; it can only be used in the production of port-style wines.

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Adding potassium sorbate

Because it inhibits fermentation from resuming, the use of potassium sorbate is advised for wines that contain residual sugar or that will be re-sweetened. However, it is critical to understand what sorbate actually accomplishes in order to use it appropriately. Because it does not really kill yeast, potassium sorbate has earned the term “yeast birth control” for its ability to make it harder for them to multiply. This means that you must wait for all of the now-sterile yeast cells to die of old age before using sorbate to treat an active fermentation; otherwise, you run the risk that a typical dose of sorbate will not be sufficient to treat the whole yeast population.

After that, allow the wine to remain in its carboy under an airlock for two to four weeks to allow the sorbate to do its job properly.

It is also advised to add the sulfite at the same time as the sorbate; the double whammy of the sulfite and the sorbate should reduce the amount of yeast to zero if given enough time to do its job.

Use potassium sorbate sparingly when working with a wine that has gone through or is in the process of going through malolactic fermentation; otherwise, the wine will develop an unpleasant geranium smell that will not go away.

Sterile Filtering

Filtering, when done correctly, is the most dependable method of halting the fermentation process. “Correctly” refers to the process of sterile filtering, which involves physically eliminating yeast from the wine by pushing it through a system with filter holes that are so small that yeast cells cannot pass through them. In order to achieve this, the “hole size” of the filter must be no greater than 0.45 microns in diameter. The wine should be filtered into a closed tank and then into bottles so that it does not come into contact with the air again, otherwise it will get contaminated with yeast again.

Because of this, it may be essential to pass the wine through a coarse filter (for example 1.0 micron) before proceeding with sterile filtration.

For amateur winemakers who brew their fruit or flower wines in one-gallon jugs, filtration is also out of the question because it is impracticable to filter such tiny volumes of wine.

Other techniques

After learning about three methods for leaving a wine with no yeast and no chance of re-fermenting in the bottle, we can conclude that they are: fortifying with alcohol, adding potassium sorbate, and sterilizing the wine. However, as we have seen, each of these ways has its own set of exceptions in which it cannot be employed, indicating that there is no one-size-fits-all solution to the problem of how to prevent a wine from re-fermenting. An experienced winemaker must choose which of the three procedures is most suited for each unique wine.

Take, for example, the situation where you only had enough blackberries to ferment one gallon of wine, which you wanted to back sweeten to 1 percent sugar in order to bring out the fruitiness of the berries Although you have the equipment, filtering the wine would be impractical due to the small batch size, you do not want to fortify the wine because you prefer a fruity style, and blackberries contain a high concentration of malic acid, which if accidentally exposed to malolactic bacteria (there are wild strains floating around) could cause malolactic fermentation and spoil the wine if potassium sorbate were added.

What options do you have?

  • Try planned obsolescence, which is the process of fermenting using a yeast strain that naturally dies at the appropriate period. Some strains are less tolerant of alcohol than others, and as a result, they will die sooner if the ABV is raised above their threshold of tolerance for the substance. You can find charts comparing the characteristics of different yeast strains on the websites of wine yeast manufacturers and in some winemaking books, which you can use to find one that will survive close to, but not past, the alcohol level you intend to use in your wine. This is not an exact science because yeast longevity is affected by a variety of factors other than alcohol content, but it is a good place to start
  • You may go ahead and add potassium sorbate to avoid re-fermentation as long as you are meticulous about maintaining the wine sulfite-free and free of contaminants. Even if a few stray malolactic bacteria make their way into the wine, they will not produce malolactic fermentation as long as the amount of SO 2 in the wine is kept at a sufficient level. You shouldn’t rush towards bottling the wine, especially if it contains any residual sugar. Allowing a few months after fermentation appears to be complete (i.e., no more lees are being produced) before back sweetening and bottling is recommended
  • If you are still unsure and have the refrigerator space, keep the wine chilled after bottling for an extra layer of protection against explosion. You may either adjust your plans and let the wine dry if you don’t have enough refrigerator room, or you can organize your bottles of homemade wine such that you consume the bottles that are most at danger first. You may always sweeten as you go by pouring sugar syrup into a bottle once it has been opened, or into individual glasses as you serve the dish. For sugar syrup, heat one cup sugar and one cup water in a microwave-safe bowl until almost boiling, stirring constantly until sugar is completely dissolved, then set aside to cool. In the refrigerator, the syrup will last approximately one month.

To experiment with planned obsolescence, use a yeast strain that will naturally die at the appropriate time. As a result, certain strains are less tolerant of alcohol than others, and as a result, they will die sooner if the ABV is raised past their threshold of tolerance. You may find charts comparing the characteristics of different yeast strains on the websites of wine yeast manufacturers and in certain winemaking manuals, which you can use to choose one that can live near to, but not over, the alcohol level you want to use in your wine.

When malolactic bacteria accidentally make their way into the wine, they will not produce malolactic fermentation as long as the amount of SO 2 is kept at a sufficient level.

Be patient.

You may either adjust your plans and leave the wine dry if you don’t have enough refrigerator room, or you can organize your bottles of homemade wine such that you consume the ones that are most at danger first.

For sugar syrup, heat one cup sugar and one cup water in a microwave-safe bowl until almost boiling, then whisk until sugar is completely dissolved and set aside to cool. Refrigerated syrup will last around one month.

How to Stop Fermentation in Wine

As a winemaker, it might be difficult to maintain control over the alcohol elements in order to avoid the production of a powerful wine while also resisting the temptation to add more sugar, which is normally required for a fruit wine blend. If you are a seasoned winemaker, this should come as no surprise, but if you are just getting started, it might be intimidating. But why is it so tough to do these tasks? The cause is wine’s progressive fermentation, which occurs over time. Expert Davis of the University of California notes that a winegrower can evidently fill a vessel with juice and fold arms, believing that the native yeast will result in a good fermentation; however, if caution is not exercised, the procedure of winemaking could be influenced by the presence of some pediococcus, acid bacteria, and other microorganisms, which will alter the entire operation.

This essay is intended to assist you in understanding the steps to follow and how to correctly carry out the process, but before I begin, I’d want to guide you through a critical point, which I’ll refer to as a fast grab; critical points you need to know about wine fermentation.

Wine Fermentation

Have you ever pondered what it is that causes grape juice to be transformed into an alcoholic beverage? To put it another way, it is the result of naturally occurring fermentation! What is the chemical technique and how does it work? Granted, grape juice contains a significant amount of sugar. When yeast is added to grape juice, the yeast consumes the yeast sugar, which is then converted to alcohol by the grape juice bacteria. As a winemaker, you can’t look down your nose at the fermentation process; you already know that it is a necessary element of the winemaking process; without it, there would be no wine.

But what happens when your wine has reached the degree of appeal, flavor, and sweetness that you anticipate it to reach and you want it to stay at that level?

You have the option of delaying it, speeding it up, pausing it, or even stopping it.

How to Stop Fermentation in Wine

What causes grape juice to transform into alcoholic wine is a mystery to many people. To put it another way, it is the result of naturally occurring fermentation. The chemical method is explained in detail below. Given the high sugar content of grape juice, this isn’t surprising. When yeast is added to grape juice, the yeast consumes the yeast sugar, which is then converted to alcohol by the grape juice enzyme. To be a winemaker means you must accept the fermentation process as a necessary element of the winemaking process; otherwise, there would be no wine to drink.

When your wine has reached the amount of appeal, flavor, and sweetness that you desire, what occurs is that you want it to remain at that level.

If you want to, you may postpone it, accelerate it, pause it, or even turn it off completely. Allow me to demonstrate three practical and fantastic ways for halting wine fermentation for your consideration. 1.

Stop The Fermentation With Alcohol. Why am I beginning

Is it because of the consumption of alcoholic beverages? It is the most straightforward method of halting fermentation in wine. Remember that I previously stated that yeast ceases to work as soon as the alcohol content reaches 15-18 percent. These steps will assist you in achieving that goal.

  • Step I.It is critical that you rack the wine into a sterile demijohn in order to ensure that all sediments have been removed from the wine. This is a really important phase. During Step II, you will be needed to pour alcohol into the wine until you reach a concentration of 16 percent

It should be noted that the alcohol to be used should be either grape distilled, brandy, or vodka.

  • 3.Allow the wine to rest undisturbed for the following week to determine if fermentation has occurred or not
  • If there is no evidence of fermentation, you may safely rack the wine simply once more and bottle it
  • 4.

Despite the fact that it is straightforward, one disadvantage you should be aware of is that the poured alcohol will affect the flavor, particularly if vodka is utilized. It is possible that your wine can have an unpleasant flavor if you do not take care. Aside than that, I would definitely suggest this strategy.

Chill Down The Fermenting Wine

This procedure can also be useful in certain situations. In contrast to the very first way, which will change the taste, this procedure has no influence on the intensity, scent, or savor of the wine. Is there a sigh of relief? It’s something to be expected. But there’s more, and it’s also really easy. What is the major goal here? It is necessary to chill the wine to a temperature at which the yeast will cease its activity and precisely precipitate on the base of the demijohn in order to do this.

  • Place the wine in the refrigerator or a freezing chamber in order to maintain the correct temperature of 45-50 degrees Fahrenheit for 3-5 days.

The bottom line is to always keep an eye on it; it should always be above the freezing point of the water.

  • Second, inspect the carboy to see whether the yeast has precipitated, if there is any partial concentration or settling on the bottom of the carboy
  • And third, taste the beer. Step number three. Remove the sediment from the wine by carefully racking it into another standard sterilized demijohn
  • While you’re doing it, make sure the temperature is between 55 and 60 degrees Fahrenheit. Step number four. Lastly, you should let the wine to reach its average temperature and, if it continues to ferment, you should repeat the process

There is also a negative aspect to consider in this situation. During the racking step or during the filtering stage, it is extremely possible that you may remove part of the yeast. Do you have any idea what that means? The process will be restarted from the beginning. However, this is something that may be prevented. Here’s what you can do to help: When filtering the wine, add approximately 0.14oz of Sulphur trioxide to each gallon of wine to achieve the desired result. However, the truth be known, the quality of the wine is in fact on the line.

Tune to Pasteurization

It is by far the most successful method of halting fermentation in wine since it is the last procedure used. Before I go into detail about the stages, keep in mind the following: The yeast dies as the temperature rises above 104°F. Because of this, you must heat the beverages above that temperature in order to prevent wine fermentation.

  • Step I.Make certain that the wine is poured into a sterilized jar
  • Step II.Start the heating process by raising the temperature above 158°F and maintaining a balanced temperature for around 10-20 minutes
  • Step III.Make sure that the wine is poured into a sterile jar
  • Step IV.

Step I.Make certain that the wine is poured into a sterilized jar; Step II.Start the heating process by raising the temperature above 158°F and keeping it there for 10-20 minutes to get a balanced temperature; Step III.

  • Step III.Immediately after removing the jar from the heater, allow it to cool completely. The temperature should be between 55 and 60 degrees Fahrenheit. Step IV: Filling the bottles! You have to bottle everything right now.

The challenge in keeping a steady temperature for 15 minutes while also chilling the wine rapidly enough is the deciding factor in whether to proceed. But, see, here’s something: If you’ve ever had a good glass of wine, you’ll agree with me that the process is well worth the effort. Wouldn’t you agree?

I am confident that you will be able to stop fermentation in wine using these methods in the future. You can wonder which is the most important. It all comes down to personal choice. In such case, I’d recommend making a decision based on your preferences and the resources at your disposal.

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