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Alcoholic drinks from Southern China
Longan wine is a fruit wine made by fermenting the juice of the longan (Dimocarpus longan) with wine yeast. In published methods the juice is pressed from the flesh, adjusted for sugar, sterilised, and fermented at about 30 °C for nine days. Some makers add longan seeds or a seed extract, which raises the wine's phenolics and antioxidant activity. Made in 4 steps over 9 days. The longest step, ferment, takes 9 days (Phovisay S. et al. 2024) and runs at 30 °C (Phovisay S. et al. 2024). Saccharomyces cerevisiae does most of the fermenting.
| Main step | 9 daysReported[phovisay2024] | Ferment |
|---|---|---|
| Temperature | 30 °CReported[phovisay2024][tandee2021] | Ferment |
| Acidity | pH 6 → 3.85Measured[phovisay2024] | Ferment |
| Fresh longan flesh (aril) · E-dor cultivar in the Thai study; blended and pressed through cloth[phovisay2024] | |
| Water, to adjust the juice to about 14 % Brix[phovisay2024] | |
| Wine yeast (Saccharomyces cerevisiae) · Commercial strains such as EC-1118 or Lalvin KD, or local isolates[phovisay2024][tandee2021][liu2018] | |
| Up to 50 % seed in juice preparation, or 0.25–0.5 % (w/v) seed extract | Longan seed (optional) · Adds tannins and phenolics[tandee2021][phovisay2024] |
| Starter | defined-culture (wine yeast) |
Total time across the recorded steps: 9 days
What changes: Longan flesh is blended and the juice is pressed through cloth
Output: longan juice.
Microbes at work in this step
Not documented for this step.
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
Longan wine is fermented from the fruit's own juice. The longan liqueur sold under the same name is longan flesh steeped in spirit and is not fermented. Adding longan seed, rich in tannin, raises the wine's phenolics and antioxidant activity but can slow tannin-sensitive yeasts.
No safety limits specific to longan wine were found. Laboratory recipes sterilise the juice before adding yeast so that only the chosen strain ferments it.
Every number is labelled with how it is known. How this atlas is made
Longan is one of the main fruits of northern Thailand, where it is dried, canned and frozen; wine is studied as a way to use the large harvest and its seeds, a by-product of drying.
