Red Wine

Making Red Wine

Fermentor + Press


1 ton of grapes, yield of 150 gallons/ton or more

No Installation, 4’x4’ space. 110VAC.

No cleaning

Single-use liner, no cleaning. No wash or waste water, no environmental permits.

Medical grade BPA-free biodegradable.

Automated Punch

Unattended punch. Set schedule on your smart phone.

Built-in Press

Built-in press. Machine presses out the wine.

Automated Cap Management

Red wine fermentation is done with crushed or whole grapes. This must contains skins, seeds, and some stems. During the fermentation, it is necessary to extract flavor and color from the skins, and other components. The major challenge with red wine fermentation is cap management. The "cap" consists of solids that float up due to the carbon dioxide generated in the fermentation. These solids clump together to form a mass on top of the fermenting wine.

The GOfermentor works with nature - instead of forcing the buoyant cap down, the liquid below the cap is pushed up. This is done by inflating the secondary chamber. This expanding chamber presses against the fermenting must in the primary chamber. The action pushes the liquid in the primary chamber up through the cap and then squeezes the cap itself, reducing its cross-section so that it breaks up.

Once the cap is squeezed, the pressure is released in the secondary chamber and chunks of cap drop back onto the liquid surface. The liquid that was forced through, has thoroughly wetted the cap, and now slowly percolates through the cap fragments back into the liquid layer below. The primary chamber then slowly resumes its original conformation as the CO2 builds up. The whole magic is done by inflating the secondary chamber as shown in the animation.

Getting Started with GOfermentor

The single-use GOLINER is placed inside the GOBASE container. The destemmer/crusher discharge is connected by a hose to the top inlet port of the primary chamber of the GOLINER. This inlet has a standard 2" Triclamp port for easy connection. Alternatively, the liner can be filled by hand or gravity through a cut slit.

The Fermenting Process

During the course of the fermentation, the primary chamber will inflate due to the CO2 evolved in the fermentation. A spring loaded vent valve vents any excess CO2. Air cannot enter the liner. Samples can be taken at any time by attaching the sampler to the fill port.


Temperature Control

Temperature of the fermentation is continuously monitored by an optional probe inserted through the sampling tube. Data is monitored for control and recorded. An optional stainless-steel heat exchanger (GOcooler) can be mounted under the GOliner. An electric valve is provided to automatically regulate the circulation of cold fluid through the heat exchanger plate in order to maintain temperature.

Punch Down is now a Punch-UP!

This unique concept is only made possible by the use of flexible bag technology and is the secret to why the GOfermentor can extract so much color and flavor, even from marginal grapes.

Manual or programmed, the punch sequence consists of three steps:

Step 1: Initiate the Punch

Initiate the punch, either manually or scheduling a timer-based autopunch. This first opens the electric vent valve - venting the CO2 in the primary chamber to the atmosphere allowing the primary chamber to deflate.

Step 2: Squeeze the Chamber

Once the primary chamber is deflated the secondary chamber is rapidly inflated using the built-in fan. This squeezes the primary chamber and it rises up. Liquid in the must is forced up through the cap and moistens it thoroughly. The secondary chamber pressure is pulsed a few times to break up the cap

Step 3: Punch Done

The inflation fan shuts off and the secondary chamber deflates. The electric vent valve now closes and the primary chamber starts to pressurize again as the CO2 builds up. Any excess pressure is automatically vented through the pressure relief valve.

Pressing the Red Wine

With the GOfermentor, we use the secondary inflation chamber as a built-in bladder press. Harvest and pressing 1000 liters takes less than an hour and requires just one person. Here is how it works:

Stop Punching 2 days before harvest to get clear wine below cap.

Remove probe and vent. Remove the sampling tube and vent valve. Insert the Pressing Tube to the vent port. Cap the sampling port.

Connect to self-priming wine pump. Connect a hose from the Pressing Tube to a self-priming wine pump. Connect the pump discharge to a collection vessel or bag.

Start the pump. Clear free-run wine will flow out from the GOliner to the collection container. Any suspended seeds or stems will remain in the liner.

Activate punch. Once free run stops, start pressing the GOliner by activating the PRESS function to gently squeeze the pomace.

Discard GOliner. Disconnect everything. Remove and discard the GOliner containing waste pomace.