Adjusting pH of wine after fermentation

Why use MEGA bipolar electrodialysis (EDBM) for wine acidification and deacidification

MEGA presents a bipolar electrodialysis for adjusting wine pH with no need for additional chemicals, so the wine remains natural. Therefore is this technology also suitable for organic wine production.

With MEGA membrane technology, you can adjust the pH both up and down to achieve a harmonic balance between sweet and acid taste. The usual pH change is up to 1.

Our innovative bipolar electrodialysis is developed for both small and large wineries. We supply technology tailored to the customer's needs, therefore the EDBM unit can be used in both stationary and mobile versions.

By using MEGA bipolar electrodialysis you get the final product of higher quality with lower OPEX.

Benefits of MEGA bipolar electrodialysis

• Minimal wine loss compared to other conventional methods.
• Easy pH adjustment (pH change from 0.1 to 1.0).
• Additive–free technology – fully organic wines.
• No legislation limits.
• Low operating costs – no chemical additives required (no tartaric acid, no malic, lactic, etc.).
• Continuous and fully automatic process.
• Cost-effective and reliable operation.

Wine pH adjustment – how does it work?

The goal of wine pH adjustment is to find a harmonic balance between sweet and acid taste. MEGA electrodialysis with bipolar membrane process (EDBM) is based on the unique properties of the bipolar membrane (BM) in combination with monopolar cation/anion membranes (CM / AM).

EDBM adjusts the pH of the solution without adding any bases or acids. BM effectively splits water (H₂O) into H⁺ and OH⁻ under the influence of the applied electric field. CM and AM transfer cations or anions and selectively generate acid and caustic streams. Therefore, acids or basis in wine are replaced with OH⁻ or H⁺, and you can easily set up wine pH both up and down (deacidification/acidification).

Wine acidification
For not enough acidic wines grown mainly in hot areas (south of USA, Australia, South America) we use the BM-CM module, which is designed to acidify the wine.

Wine deacidification
For overly acidic wines grown mainly in cold areas (north of USA, Germany, Alsace, north of Europe) the BM-AM-AM module is designed for deacidification.

MEGA EDBM vs competitive technology

Simple implementation to the already existing manufacturing lines.

The MEGA EDBM technology uses a lower amount of chemicals for the process (without regeneration of ion exchange columns) and CIP. At the same time, it also shows a significant reduction of wastewater from production.

This dramatically reduces the footprint of wine production. In general, bipolar electrodialysis is an automatic system that is easy to operate and maintain and significantly reduces the environmental impact.

Compared to other technologies EDBM doesn’t touch the basic structure of material but removes dissolved solids by the natural attraction of charged ionized particles towards the electrodes. There is no need for additives.