Three ways of liquor preparation clarification and filtration

Clarity is not only the basic requirement for wine (except turbid wine), but also an important aspect of maintaining wine stability.

To obtain clear and transparent liquor and keep it stable, clarification is needed.

Filtration can remove suspended substances and make the liquor clear.

When there are no visible suspended substances and only potential influencing factors in the liquor, it is necessary to add clarifiers to precipitate these components, and then remove them by filtration.
Therefore, clarification and filtration are always linked.

There are many potential factors causing wine turbidity, so it should be selected according to the specific reasons and the properties of clarifiers.

Diatomite filter

Diatomite is a kind of siliceous sedimentary rock formed by diatom organisms. Diatomite deposits in China were formed from the third century to the fourth century. Diatomite filter aid is made from diatomite rock through crushing, calcination, air separation and classification. The main chemical composition of diatomite is SiO2.

Diatomite has tiny porous structure, small density, large specific surface area (10 ~ 20m2 / g), porosity of 80 ~ 90%, good adsorption performance and can filter out 1.0 μ The working principle of diatomite filter is to coat diatomite on the filter screen to form a filter layer. When the liquor passes through, the suspended solids in it can be separated.

Diatomite filters are of plate and frame type, candle type and horizontal disc type. The plate and frame diatomite filter is a relatively new type, which has the advantages of stable operation and adjustable filtering capacity. Candle diatomite boiler filter is named because the filter element is shaped like a candle. Diatomite filter has the advantages of small volume and large filtering area.

Cardboard filter

Paperboard filter uses paperboard as filter medium. Paperboard is made of refined wood fiber and cotton fiber mixed with asbestos, and some are also mixed with adsorbents such as diatomite and PVPP. The cardboard used in the cardboard filter can be recycled.

Membrane filtration

Membrane filtration is now more and more used in wine production.

It has the advantages of no phase transition, treatment at room temperature, and a variety of membrane properties.

Tongrentang company successfully solved the problem of Guogong liquor precipitation by membrane filtration.

Using polypropylene hollow fiber module to treat wine samples can remove most of the sediment, but the taste and properties of Guogong wine have no obvious change, and retain the effective components in the wine, which has no effect on the wine quality.

The recovery rate of liquor reached more than 95%.

In order to ensure the active substances of flavonoids, alkaloids and glycosides, the content of effective components can be purified and improved.

Yang Chunzhe et al. Treated cider with ultrafiltration membrane with closure relative molecular weight of 30000 ~ 50000 to remove pectin and protein substances causing turbidity.

The treated cider retained most of the nutrients and flavor components.