of the study, winemakers are
take these into consideration
when weighing the pros and cons
of adopting electrodialysis technology.
Other considerations such as space,
time, and winemaking style must be
taken into account.
The nuances and long-term plans of
each winery will influence the most
appropriate method.Winemakers must
be especially aware that adopting electrodialysis
technology results in
necessitates increased wastewater treatment
and associated costs.
Fetzer Vineyards was in a unique
position in that they already employed
multiple water conservation methods
and it was therefore
easy to accommodate
extra waste water. Winemakers
who do not have this capability must
be prepared for increased water related
expenses. To that end, PG&E
will conduct a study in which winery
wastewater treatment practices will be
examined and benchmarked.
"We are aware that electrodialysis
uses more water than traditional stabilization,"
says Fetzer's Thrupp.
"However, the relatively small
increase in water for this technology
is addressed and compensated for by
ongoing water conservation practices
throughout the winery, bottling facility,
and vineyards. In addition, the
water is treated on-site through aeration
ponds and is reused in the vineyards
PG&E supports the adoption of electrodialysis
technology forwine stabilization
as an energy efficiency tool, and
encourages winemakers to insulate
tanks to save energy in the cold stabilization
process. To that end, PG&E is
currently offering incentives for adopting
non-mobile electrodialysis technology
or for insulating wine tanks.
To find out how PG&E can evaluate
your possible energy savings using
electrodialysis technologies, call the
PG&E Business Customer Service
Center (800/468-4743) and ask for the
project manager in your area.
[Steve Fok, PE, has been managing
power generation, environmental compliance,
and energy efficiency projects at
PG&E for 29 years. Steve can be reached at
415/223-4735 or SKF2@pge.com.]