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The Maritime Alliance
Symposium on Desalination
LFNano™ Membrane System
January 28, 2011
Who is DXVWho is DXV
Slide 1
40 years of running water
treatment
40 years of running water
treatment
SaigonSaigonLong
Beach
Long
BeachAnaheimAnaheim
Alter contaminants or remove themAlter contaminants or remove them
Slide 2
Physical removal can be expensive
Physical removal can be expensive
ChemicalChemical BiologicalBiological PhysicalPhysical
Like your house’s air filter…Like your house’s air filter…
Slide 3
…water treatment membranes clog
up
…water treatment membranes clog
up
Washable filters save money at
home…
Washable filters save money at
home…
Slide 4
…but require a little more work…but require a little more work
Cleaning frequency …Cleaning frequency …
Slide 5
… fewer is better… fewer is better
1 to 2 times per
year
Water treatment membranes get
washed
Water treatment membranes get
washed
Slide 6
…10,000 to 25,000 times per year…10,000 to 25,000 times per year
“Membrane Fouling”
Low Fouling NanofiltrationLow Fouling Nanofiltration
Slide 7
Unique element configuration
Commercially available flat sheet
NF
Feed water circulation
Online fouling avoidance system
Unique element configuration
Commercially available flat sheet
NF
Feed water circulation
Online fouling avoidance systemNo Chemicals
LFNano™ Pilot TestsLFNano™ Pilot Tests
Slide 8
Second generation pilots currently operating
LFNano™ Pilot Test – WWTP EffluentLFNano™ Pilot Test – WWTP Effluent
Slide 9
10 minutes 8 months
Traditional LFNano™
Time to 5 PSI Pressure DropTime to 5 PSI Pressure Drop
Significance?Significance?
Slide 10
Low cost physical barrier
New membrane economics
Modular/scalable
Direct membrane treatment of
wastewater
Low cost physical barrier
New membrane economics
Modular/scalable
Direct membrane treatment of
wastewater
ApplicationsApplications
Slide 11
Water reclamation
RO pretreatment
Drinking water
Wastewater treatment
Fouling Limits Membrane AdoptionFouling Limits Membrane Adoption
Slide 12
‘The next great water technology will be the one
that finds a solution to membrane fouling.’
-- Christopher Gasson
Editor, Global Water Intelligence
October 2010
