II.2.1.11.1 Filtration on a filter bed

Classification:

• Diatomite: processing aid
• Perlite : processing aid

Definition :

Filtration of the must through a bed of auxiliary filter material.

Objective :

See II.2.1.11 ‘Filtration’

Prescriptions :

The filtration can be undertaken :

a)        By continuous deposition of the bed on appropriate supports;

b)       On a filter bed formed on a rotary drum under vacuum with continuous elimination of the external skin containing the filtered particles.

Auxiliary filter materials, such as diatomaceous earth, perlite and cellulose, are chosen as a function of the degree of clarification desired. They shall comply with the prescriptions of the International Oenological Codex.

Recommendation of the OIV:

Admitted