4 2 V I N E YA R D & W I N E RY M A N A G E M E N T
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fibers encased in a stainless steel
or plastic housing), today's sym-
metric hollow fiber membranes run
at lower pressures, require less
energy and generate less heat.
"Polymer filters perform best on
wine with low levels of solids,"
says Mignotti, who currently uses a
polypropylene membrane and also
recommends modified Polyvinyli-
denefluoride (PVDF) membranes
like those made by Pall Corporation
of Port Washington, N.Y. "Other
polymers, like Polyethersulfone
(PES) membranes, are excellent for
white wine, and cost effective, but
they aren't suitable for reds with
higher levels of solids."
Pall manufactures hollow fiber
filtration systems, the Oenoflow
XL system for wine clarification and
the Oenoflow HS system for lees
recovery, and sells direct to the wine
industry globally. "PVDF is a very
robust membrane that withstands
backflushing during operation to
maintain longer filtration cycles and
repeated regeneration with chemi-
cals for longer membrane life," says
Nicole Madrid, global food and bever-
age marketing manager for Pall. "A
key feature is our low concentration
volume (LCV) option, which isolates
one filtration module to further con-
centrate the wine or 'hold up' that
remains in the system at the end of a
run to significantly reduce losses.
"Our Oenoflow HS system has
dual filtration capability," she adds.
"With wide diameter hollow fiber
membranes, it works well process-
ing high solids for recovering wine
and juice from lees. When not in
use for lees filtration, it can be used
for post-fermentation wine clarifica-
tion to expand cellar capacity."
AFTEK
800-240-5366
www.aftekfilters.com
ATP Group
707-836-6840
www.americantartaric.com
ColloPack Solutions
707-258-3940
www.collopack.com
Criveller
707-431-2211
www.criveller.com
Della Toffola USA
707-544-5300
www.dellatoffola.us
Filtrox
425-820-4850
www.filtrox.com
Gusmer Enterprises
559-485-2692/908-301-1811
www.gusmerenterprises.com
H2O Engineering
866-987-0303
www.h2oengineering.com
Mavrik North America
707-320-0672
www.mavrikna.com
Pall Corporation
866-905-7255
www.pall.com
Shelco Filters
800-543-5843
www.shelco.com
UHP
559-203-0057
www.uhpfab.com
VA Filtration
707-552-2616
www.vafiltration.com
Winesecrets
707-824-2022
www.winesecrets.com
Winetech
707-257-2080
www.winetech.us
FILTRATION SUPPLIERS
Ceramic membrane filters, like
those sold by Della Toffola, a Vene-
to-based manufacturer, are solid
rods made of an extremely strong
aluminum/titanium compound —
the kind used for medical bone
replacement — that are perforated
with tubular channels. Multiple
ceramic rods called candles are
Pall's Oenoflow HS is a hollow fiber filtration system for lees recovery.
