Strong Smell In My Wine August 3, 2007
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Hydrogen sulfide is the most commonly noticed off-odor coming from a must. This email covers the reasons for this odor and how to correct it.
Hi!
I have a quick question...My wine (SunCal Pinot Chardonnay) is 2 weeks into its secondary and ready for its 1st racking. However, I noticed a strong sulfur odor. I've never experienced this before. I've made several wines from different concentrates and grapes (mostly concord), but have never made a chardonnay or had such a strong odor like this. The taste of the wine is not really effected to a great degree. Is this a characteristic of this type of juice? Should I be worried? Will the odor dissipate over time after being racked off the sediment. Is there anything else I can do? HELP!!!
Jeff
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Dear Jeff,
The smell you are describing is most likely hydrogen sulfide, which is a natural bi-product of a fermentation. However, excessive amounts are not normal. There are a few reasons excessive amounts of hydrogen sulfide may occur.
The most probable reason you are getting this odor in excess is the temperature is too warm. The ideal temperature for fermentation is 70-75 degrees F.
Another reason would be lack of nitrogen (yeast nutrient), so make sure to put in nutrient or energizer if the recipe calls for it.
If the yeast did not multiply enough during the primary fermentation, you may also notice this odor because the yeast is overworked. The yeast need oxygen in order to multiply. We recommend covering the container with a cloth during the primary fermentation so the yeast can get oxygen. After the primary fermentation, you need to use an airlock.
The smell will lessen over time. If the odor is too much, you can do the following to a finished wine. You can aerate the wine by racking the wine in a splashing manner. You can also poor the wine over sanitized copper. This will help to release the odor. If you do either of the above, be sure to put in a dose of Campden Tablets or sodium bisulfite to drive out any oxygen you may have introduced and to help with any remaining odors.
Best Wishes,
Customer Service at E.C. Kraus|
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