Flung by fates into wine's waves, this site charts my navigations into the fermenting sea beyond academia's herculean pillars.
Showing posts with label fining. Show all posts
Showing posts with label fining. Show all posts

06 September 2010

BLUEBERRY.BOUND

A week ago I added Sparkolloid Powder to my blueberry wine must. This blend of crab-friendly clay and polysaccharides sunk the floating yeasts and blueberry bits by positively charging them. Now three inches of detritus and less than a gallon of clear blueberry goodness remain.
Time to rack the good from the ugly. The somewhat drinkable from the undrinkable...and purple...
Not bad. But another racking is on order.The temperature breaks record this week. Granted it was only 95F, but in the North East that matters. Wine with loitering yeasts could restart fermentation or simply spoil.

The vast universe of tank air-space also worries me. Every day I spray Private Preserve to protect the wine from oxidizing. But I have no clue how long that blanket of inert gasses will hold.

Impatient, I set up to bottle.
Last time, I filled twenty six bottles. Six months on, I still have twenty. It is not every day you want to guzzle pink colored, banana-strawberry flavored welches with alcohol.

This time I scrounge about for half bottles. A gallon will fill ten 375ml bottles. Hopefully, I can also get rid of some wine as gifts. I mean, gift away my hand-harvested blueberry gold to a deserving few.
Once everything is sterile (including myself), I try racking the wine into bottles alone. I fail. So, I grab my spouse from dinner preparation.

I will pump. She will take on the tube's end, which, annoyingly, will not fill unless pressed at the right angle, under pressure, into the bottle. The siphon trigger cannot work unless against a flat surface, and most bottle punts (bottoms) curve.

So, with wife hating me, we begin.

The must remains hazy. This is annoying. I should have racked again. Maybe filtered. Most Americans view hazy wine as faulty. No one really wants to decant and let the sediment settle for a half hour or more. Conditioned by fast food, year-round strawberries, and driving to our mail box, we want immediate satisfaction. Allowing a wine to rest postpones enjoyment, unbearably for some.

But I have to stay true to the fruit. In bottle, a bit of lees (skins) will continue to contribute to the evolution of the wine's character. Filtering would remove that.
With three regular bottles (750ml) and three splits (375ml) brimming with blueberry, we taste what wine is left.

The color is of mild intensity, ruby with a slight haziness. The nose has light intensity of tart cherry, apple, clay and some sulfur. On the palate it is dry, with medium to high acidity, light tannin, light body, short length. Flavors of green and red apple (malic acid), wild strawberry, kiwi and a touch of sulfur slide by the palate in one note.

Decent and drinkable. I should have extracted more color and flavor by not bagging the skins and instead punching them down during fermentation. More time on the lees after fermentation would have also added more complexity. I also should have avoided the temptation to chaptalize (adding sugar to up the alcohol). Stupid internet advice.

Most fruit wines lack acidity and have little shelf life. Thus the blueberry acidity will help the wine age. The hint of sulfur lingers from using too many campden tablets for so little must. My frantic fear of spoilage will help preserve the wine in the long run.

It seems odd that my wine does not taste like blueberries. However, most wines do not taste like grapes. They taste of the process: the added acidities, oak, yeast strains, microxygenation machines, and chemical tweaking. I realize that blueberry "flavored" wines and beers that I have had use blueberry concentrates, distillates, or worse, chemical blends like ethyl safranate, butyl-2-butenoate, and ethyl-3-hydroxybutyrate. Yum!

Regardless, my bottles need corks. Time to give them one last inert gas spray and cork them.

With the bottles corked, I rest them sideways to ensure the corks get properly moist. Otherwise, air could get in or wine could leak.
A week later I cap the bottles with remaining foils from my kit. No nibbling mice or bunnies will eat my corks...this time. Some sediment survived the racking, but we could all use a little more patience. Decanting or just pouring slowly would suffice.In the end, going from fruit to ferment to fining to finishing was plain scary. So much more could go wrong compared to kit wine. This was not a sterilized bag-o-juice, chemically balanced to perfection and paired with packets for each step.

With more involvement and knowledge about your source materials, the harder it becomes. Picking the berries by hand forced me to worry about every detail. I had to choose between different berries, yeast strains, cleansers and fining agents. I took it personally when fermentation would not start. I rinsed equipment religiously, until the rotten-egg reek of sulfur went away. I sulked around the house for days concerned about adding sugar, water or acids. Every choice seemed wrong.

Yet every thing worked out.




18 August 2010

CRUSTACEOUS.KINDNESS

A day after cheating the fates and re-fermenting with sugar, I rack the must back into the first fermentation tank. After a sound sleep, I wake to check the Specific Gravity.Like my morning paper, another day of reading a near 1.000 SG leaves few surprises. With no CO2 bubbling about, I rack the must back into the glass carboy to kick out loitering bubbles.

After a day of "real" work, I come home and look for CO2 bubbles and off smells.
The next step requires stabilizing the must. The yeasts need to stay dead, or I will have another riot of Pompeii-amphitheatric proportions. So I turn to chemical warfare.Last time, I blindly used a packet of metabisulfite & Vitamin (E) C, which stabilized the Barbarescocanadianwelches. I think. This time, my arms included potassium sorbate and a sulphite (in the handy form of a Campden Potassium Metabisulphite tablet). Combining the sorbate and the sulphite will create sorbic acid. Like the love child of Juno and Jupiter, my Mars-like acid will halt any further yeast orgies.With yeasts vanquished, their CO2 no longer blankets and protects the must from oxidizing. I would like to avoid blueberry vinegar. Instead of panicking like last time (over topping off the must with "real" wine, or worse, water), I turn again to my trusty Private Preserve can-o-neutral gasses.
After an over-thorough spray, I cap the airlock and wait for tomorrow's fun.
A new rise of Sol's chariot sees me ready to clear the must. Proteins and yeast cells still float about in a haze of negative energy. Kieselsol and Chitosan led the charge last time, positively zapping the yeasts, which, in turn, bound into heavy lees and sank. Great. Regrettably, Chitosan comes from crustacean shells, while Kieselsol is liquid silicon dioxide. Why kill crabs and, um, silicons, when more crab-friendly alternatives exist?
Thus, I choose Sparkolloid Powder. Sparkolloid mixes polysaccharides (from fungi or seaweed) with diatomaceous earth (hard shell algae fossils). Without offending any central nervous systems, I boil water and add the powder.

This whole fining process would not be necessary with more time and wine. But with too much airspace, hot summer days and my impatience, I needed to speed it up. So I stir in the Sparkolloid, re-spray the must, airlock it and wait.

A week will reveal whether any of this worked.

22 February 2010

TABULA.RASA

Now the step of clearing the wine lay before me. Last week had let the remnant CO2 bubble away. Windows had been cracked and the sun blocked, freezing my wife, but keeping the wine from jumping into a bacterial outbreak of disaster movie proportions.
Inches of grape must and dead yeast now lay at the bottom of the carboy. Tasty. They needed a proper burial, so I re-racked the wine, halting just before I sucked up the purple elmer's glue (melted mcdonald's grimace?) at the bottom.
Annoyingly, yeast corpses and bubbles still persisted. Another racking and stirring was in order. So I reenacted the bathroom scene in Pyscho...
cleansed everything with sulfur, let dry and double checked the specific gravity: 0.997ish...good enough.Once clean and dry, I return the wine to the carboy and begin the stirring. My instructions warn this could take "1 hour to 3 days depending on how much CO2 is present". Seriously?Luckily the bubbles whisk away after a few hours of intermittent stirring. I immediately switch to my chemical packets before too much oxygen sours the wine.
First up, Sodium Metabisulphite: the gods' gift to food preservation (n.b. if you get headaches from wine, don't blame a sulphite allergy, which is as rare as a peanut allergy (a serving of broccoli has more sulphites than a bottle wine anyway). Instead, you either react to the dehydrating effects of alcohol and tannin or the antihistamine inducing cogeners. So eat something, drink less or slower for crying out loud).

With my wine preserved for all time, I switched gears to the fining process. Within mystery packet #5 (what happened to #3 and #4 by the by?) was Kieselsol: a negatively charged silica gel. With the Kieselsol mixed in, I waited a half hour for it to go about negatively charging the yeast cells.
Finally, I squeezed in the Chitosan. This petrollium jelly-like substance comes from crustacean shells (sorry vegetarians). Its positive charge bonds to the negative mess of yeasts and Kieselsol dropping them in clumps to the bottom.

To make sure all this pseudo-chemistry had time to work, I called it a night. A worry lingered however. The instructions advise me to top off the carboy to avoid oxygen turning the wine to vinegar (you might recall that our recently-departed yeasts made CO2, which had kept oxidation at bay). However, watering down the wine or adding another wine sounded like horrible ideas.

"EUREKA"! Instead of squeezing Archimedes down my carboy's two-inch neck, I went in search of glass marbles to increase my wine's volume! Hah! Classics does pay! An hour and a few pet and craft stores later, I returned home empty-handed.

Then I realized: "replace the CO2 with...well...CO2"! I took my handy Private Preserve gas-in-a-can (that I used to keep half-drunken bottles fresh) and gassed my carboy and capped the top with the airlock. The next morning, the ladybug of prophecy signaled my success.