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Cellar Operations · 6 min read

Fermentation Management Equipment for Wineries

Good fermentation management is mostly about control: holding temperature where the wine needs it, knowing what is happening inside the tank, and being able to act — add nutrients, move wine, manage the cap, keep oxygen out — at the right moment. The equipment that supports this is not exotic. It is a jacketed tank you can heat and cool, reliable temperature monitoring, basic measuring tools, and a clean way to dose additions and transfer wine. Malolactic fermentation (MLF), the secondary bacterial conversion that softens acidity, leans on the same toolkit, with an emphasis on holding the right warmer temperature and tracking progress. This guide maps the equipment to both fermentations so you can see what genuinely earns its place in the cellar.

This is buying education, not winemaking or microbiological advice — confirm temperatures, nutrient regimes, and MLF management with your own winemaking resources.

The two fermentations, and what each demands

Primary (alcoholic) fermentation converts sugar to alcohol via yeast and runs warm and energetic. It needs cooling to stop temperatures running away, headspace and cap management for reds, and monitoring so you can track the sugar drop.

Malolactic fermentation is a slower bacterial process that converts sharp malic acid to softer lactic acid. It generally prefers a warmer, stable hold and benefits from gentle handling and oxygen control while it completes. Both are, at heart, temperature-and-monitoring problems — which is why a well-equipped fermentation tank serves both.

For the foundations, start with the wine fermentation equipment overview and the winery temperature control guide.

Temperature control: the backbone of both

Nothing shapes a fermentation more than temperature. The core kit:

• Jacketed fermentation tanks that can be cooled (and, for MLF, warmed) via a glycol or hot-water loop.
• A glycol chiller sized for the cellar's peak fermentation load — get this right with the glycol chiller sizing guide and references like the glycol chiller GCS10.
• A heating source for MLF and cool cellars, since MLF often needs the tank held warmer than ambient.

The common failure here is a chiller that cannot keep up during peak primary fermentation. When that happens, ferments overheat and the wine pays for it — the fermentation temperature control problems article walks through the symptoms and fixes.

Tanks: shape and size for the job

Tank choice is part of fermentation management, not separate from it.

• Variable capacity tanks suit small lots and let you protect partial volumes after the ferment drops — useful through MLF and into ageing. See variable capacity vs fixed tanks and a workhorse like the 500 L variable capacity tank.
• Fixed jacketed fermenters handle larger primary ferments with full cooling surface and fixed fittings.
• Conical and open-top fermenters help with red cap management and lees handling; a 5,000 L conical fermenter is a typical red-wine vessel.
• Micro-fermentation tanks like the MFT100 are ideal for trial lots where you want real control at small scale.

Size the tank to the lot using the fermentation tank sizing guide so you are not fermenting a small volume in a vast tank or vice versa.

Monitoring: you can only manage what you measure

Fermentation management is a measurement discipline. The essentials:

• Temperature via a thermowell and probe, reading true wine temperature, not jacket temperature.
• Sugar / density during primary fermentation, to track the conversion and spot a stuck ferment early — refractometers, hydrometers, or density meters.
• MLF progress for malic-to-lactic conversion, typically tracked by analysis as MLF completes.
• pH and basic chemistry to inform additions and decide when MLF and stabilization steps make sense.

A modest lab corner pays for itself; even simple density and temperature tools turn guesswork into management. For the structured approach to spotting cooling trouble, see fermentation temperature control problems.

Dosing, cap management, and gentle movement

Beyond temperature and measurement, fermentation management needs the means to act:

• Nutrient and additive dosing to support a healthy primary fermentation and the conditions MLF prefers — accurate dosing avoids over- and under-addition.
• Cap management for reds — punch-down or pump-over equipment to keep the cap wet and extract evenly during primary fermentation.
• Gentle transfer for racking off gross lees between fermentations, using a suitable pump from the winery pumps guide.
• Oxygen management, since MLF and post-ferment wine are vulnerable to oxidation — the oxygen management equipment guide covers inerting and topping.

A practical management toolkit

This is the smallest set that turns fermentation from something you watch into something you manage.

FAQ

What equipment is essential for managing fermentation? A jacketed tank with cooling (and heating for MLF), a glycol chiller sized to your peak load, a thermowell and temperature probe, and tools to measure sugar/density. Add dosing for nutrients and additions, cap-management gear for reds, and a gentle pump for racking. Confirm temperature targets with your winemaking resources.

Does malolactic fermentation need special equipment? MLF mostly reuses your fermentation kit, with two emphases: the ability to hold the tank warmer than primary fermentation, and good oxygen control while it completes. You also need a way to track malic-to-lactic conversion by analysis. No exotic machinery — just reliable temperature control and monitoring.

How do I monitor fermentation progress? Track sugar or density during primary fermentation with a refractometer, hydrometer, or density meter, and read true wine temperature with a thermowell probe. For MLF, monitor malic acid conversion by analysis until it completes. Logging these consistently is what lets you spot a stuck or sluggish ferment early.

Can one tank handle both fermentations? Yes — a jacketed tank that both cools and warms can carry a lot through primary and malolactic fermentation, then into ageing if it is a variable capacity design. The constraint is usually cellar scheduling and chiller capacity rather than the tank itself. Size tanks to your lots to keep this flexible.

Bottom line

Fermentation and malolactic management run on the same backbone: a jacketed tank you can heat and cool, a chiller that keeps up, accurate temperature and sugar monitoring, and clean ways to dose and move wine. Build that core well and both fermentations become controllable rather than something you hope goes to plan.

Building out your fermentation setup? Browse fermentation tanks and temperature control on wine.equipment and shortlist options to compare.

Related on wine.equipment

• Browse the full catalogue
• Browse fermentation equipment
• Winery Temperature Control: Glycol Chiller Basics
• Fermentation Temperature Control Problems
• Fermentation Tank Sizing: Match Capacity to Production
• Oxygen Management Equipment for Wineries

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