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LEES FILTRATION - JUICE LEES

MUST/JUICE LEES FILTRATION WITH FLAVY FX:

Why should we filter must lees ?

- Economical point of view (why should we loose this must ?)

- The filtered must has a real oenological added value

- Fatty acids and flavor precursors high content

- The Bucher Vaslin Process will allow a 90% must recovery of the 10% lees

volume (i.e. 99% of the initial tank)

Which lees are we filtering ?

- Only juice lees, obtained by natural settling, after enzyme treatment

- After the press, for white or rose wines, and

- After a first clarification by settlement without fining agent, (no bentonite)

but

- Before the fermentation starts.

- The deposit of this first clarification (full of flesh, skins, seeds, stems, earth…)

is called «must lees ».

- It represents more or less 10% of the initial must volume.

The Bucher Vaslin answer …

- An automatic rotary pre-filter (called D3) (not vacuum). The use of this pre-filter is compulsory for this process

- A Cross Flow filter unit (Flavy FX 1, FX 2, or FX 3) - can also be used for wine!!

- A specially designed upper manifold equipped with mechanical, motorized

devices to avoid blocking

- Specific LWL membranes, ID 3mm, 6 m² per module (Standard 1.5mm, 12 m²

membranes should not be used). Can also be used for wine!!

- For must lees and for wines

- Operating costs 7 times less than for a RDV

- Return on Investment based on both must lees filtration and wine filtration

- No oxidation and a fresher and clearer must

- Easy to use

- Allow a batch by batch process

- No diatomaceous earth (D.E.)

- Fully automatic, a minimum supervision is needed when processing

VINTAGE FEEDBACK (Since 2008 European Vintage)

• Measured flow rates

- 300 up to 500 l/h with a Flavy FX 2 with an average flow at 400 l/h

- 400 up to 800 l/h with a Flavy FX 3 with an average flow at 600 l/h

• Rejected retentate

- 0.5% up to 2.5% of the initial volume of must,

- With an average of 1% of the volume of must (when the volume of a

must lees represents 10% of the initial must tank).