Humm Bryan am I the only one on the forum to have eaten loquats?, ,,,, (I had a tree in Houston) ,,, my numbers on fresh loquat are pH 4.90/ TA 0.37/ SpGrav 1.079
loquat is a small tree of Chinese origin with a large double seed/ roughly 50% of the fruit is pulp the rest is seed, and loquat has lower moisture than a peach. Flavor is fruity like a peach. Mine had fire blight and didn’t live to be sixteen.
@FlamingoEmporium Do you have the ability to run pH? The primary should be pH adjusted. (I have not tried loquat wine so some choices on how to process.) I see them in the oriental rice products store in syrup with good color so my guess is browning is enzymztic oxidation.
My first question is, "what is a loquat?"
* loquat browns badly,
option four: if I wanted to minimize browning I would put a gallon or two in a five gallon pail and submerge the fruit in water with 50ppm metabisulphite (AKA the concentration used in wine). At this point take a knife and start removing the seeds. (haven’t looked to see if the seed contains cyanide like cherry seed). As the seeds are removed transfer to a clean solution of 50ppm meta > acidify to pH 3.4 or even 3.2 > freeze for a week or so > thaw and run this in the primary mixing to submerge the fruit, ,,, oxygen (air exposure) will cause browning and can be minimized by having 50ppm meta in all water you use.
*
OPTION ONE: wash the loquats > put in a steamer and steam for half an hour with the goal of inactivating browning enzymes > remove and submerge in the primary target five or more pounds of fruit per gallon > adjust the added water to pH 3.0 with sugar to 1.095 > ferment with mixing every day like a red grape > at 1.010 gravity remove fruit > press or squeeze as much juice out as you can > rack the wine to a carboy > top off with water which is adjusted to 1.090 gravity.
*
OPTION TWO: wash as #1 > steam as #1 > run through a food mill to remove pulp from seeds > mix five or so pounds of fruit slurry per gallon in a primary > add water and sugar to bring the primary to 1.090/ one gallon > add pectic enzyme > add acid to bring the primary to pH 3.2 to 3.5 (yes wider since pH will equilibrate faster) > mix in bentonite as if a kit > add meta, tannin and yeast > ferment to 1.010 to 1.020 > run the wine slurry through a fine mesh filter bag under gravity, as it seems to stop add light pressure to force more wine out > transfer to a carboy under air lock with 50ppm meta > etc finish but expect cloud (might be more efficient to do bentonite in the secondary)
*
OPTION THREE: ignore the browning and just run it. Add meta to the fruit before removing seeds > press onto a bucket so that air is removed > add enough water to cover the fruit > then freeze for at least a week > run in a fine mesh nylon straining bag like peaches or plums > etc primary is at pH at 3.2/ gravity at 1.095/ tannin added etc ( I like color so a would mix in a red color juice instead of water Ex 10% raspberry or 5% cranberry or 1% aronia)
PM me if you have questions. I would test a pound with option three to look for processing issues, or do option four and ignore color. (one of the things I learned in the pilot plant was to have a back up option B or C or even D)