If you want your drink to preserve well you need at least 7% alcool.
Beer uses hop and soft cider need to be acid to preserve at low %alc..
I never used feijoa but i made similar thing with prickely cactus
pear, choke cherries, dandilion, etc. You need to add sugar to boost
the % of alcool. The sugar will be eaten by yeast and transformed (if
your worry is about ingesting pure saccharose) into alcool.
So:
1. add the desired amount of sugar to reach the proper density to get
the target % of alcool. (with the use of hydrometer)
2. Use yeast strain that is appropriate for your fermentation. Sacc.
bayanus is neutral and efficient and can tolerate high alcool or just
go WILD!!!!!
3. Add yeast nutrients for a healthy fermentation (yeast shell, epson
salt, vit. B, or premade mix), this will help to eat out all the sugar
quickly and make sure you don't have off-flavor.
hope this help!
emmanuel
On 21 déc, 04:18, misanthropic_curmudgeon