Q&A: Polymeric Membrane Filtration  The when, where and how
treatment is applied.  The following interview is with Robert
Huehmer, who currently is process manager with USFilter?s (a
Vivendi Water company) Memcor, Microfloc and General Filter
products division, located in Timonium, Md. He possesses a
bachelor of chemical engineering degree and master of
environmental engineering degree from McMaster University in
Hamilton, Ontario, Canada. Specializing in membrane treatment
for the past six years, Huehmer has designed and commissioned
MF, NF and RO membrane systems for use in the pharmaceutical,
petrochemical, and power generation industries?in addition to
his work in the wastewater reuse and potable water markets.
Huehmer has performed numerous pilot studies investigating the
use of membrane technologies to reuse municipal wastewater and
produce potable water from surface water.   What are polymers
and how does polymeric membrane filtration work?  Rob Huehmer:
The word ?polymer? comes from the Greek languag