First welcome to WMT. If your orange wine tastes good you have done a good job
. ,,, A few thoughts:
* Your starting gravity was high therefore you are stressing the yeast. It will slow down early and fermentation may have run down/ stopped all by itself.
* Your ambient temperature is high. Yeast doesn’t like 30C.
* I expect orange wine pH, without added acid, to be high ,,, closer to 4. Lemon comes in at 2.5 with a high titratable acidity. For long term storage we like white wine (fruit wine) to be 3.3 or 3.4. If you are lucky you are at goal. pH target is based on the antioxidant meta being more effective at lower pH. pH also is a preservative which prevents secondary microbial infections. This is probably going to be a good wine to drink young.
* My experience is that I always have some active yeast for six months, I expect that you see this too. The posting about CO
2 is basically saying most folks agree. Sorbate immobilizes yeast so the risk is low.
You have options on bottling/ freeing up the carboy. One low tech is to down size to 3 or 4 liter glass, keep the head space low on any for storage, and cover the mouth with a balloon. A higher tech option is a felexable wine bag, if you see the bag puffing up you can burp it and one can serve directly off of the bag.
* Several posts on CO
2 imply it is bad. YES you don’t want it to explode. Commercial still wine should not out gas. Hobby Vinters with Fruit wines at state fair have bubbles on the glass about 50% of the time, you wouldn’t be the first to have some left, , most of us don’t worry. From a stability point CO
2 acts as a preservative (keeps the system anaerobic) to reduce oxidation and reduce the pH which delays microbial issues (again a lot of fruit wine is below 3.4 pH).
* Wine is hedonic, yup you can sweeten to get it optimum flavor. From the point of view of sweet sugar is sugar. Commercial makers avoid some sugar as honey for back sweetening since it has residual protein and makes the wine cloudy. I think palm sugar also has some residual non solubles in it, I will be interested for feed back on how clear it turns out.
*Turbidity when back sweetened is cosmetic, how pretty do you want it to be? However if you never got it clear I would question if there was a bacterial infection while percentage alcohol was low.
* A comment you will see on WMT is oxygen is your enemy. For most of us this means keep the head space low.
Welcome to wine making.