M. PONTIE EDS CYPRUS CONFERENCE ROOM A Monday

Session 5 (ROOM A) : Resource management / Sustainability
www.gepea.fr
N°112 - Old RO membranes :
solutions of reuse in a Cradle
to Cradle approach
Source VEOLIA
Ashkelon
Source EMS
Maxime PONTIÉ*1, Ousseynou KAMA1,
University Angers, GEPEA UMR-CNRS 6144, 2 Bd. Lavoisier, 49045
Angers, France
Keywords : seawater; reverse osmosis (RO); lifespan; autopsy; membrane reuse;
NF/UF; wastewater treatment (WWT); module deconstruction; Cradle to Cradle
*[email protected]
CYPRUS 11–15 May 2014, Conference and Exhibition on DESALINATION FOR THE
ENVIRONMENT: CLEAN WATER AND ENERGY Grand Resort Hotel, Limassol, Cyprus
General outlines
◙ Membrane Market, desalination and
sustainability
◙ Key Results :
-¨Pilot Tests, autopsies and old RO
membranes reuse (WWT, seawater
pretreatments)
- Module Deconstruction
first pratice in a Cradle to Cradle way
Water Desalination Market IN THE WORLD
More than 17,000 units in the world
and the ENVIRONMENT
140
120
World
capacity
(billion
L/day)
78
100
Source EMS
Simulation in
2016 = 124
80
60
40
20
0
1960
1980
2000
2020
Annual mass
of old RO
modules
(x1000 t)
14
12
10
51%
RO
8
6
4
2
(IDA Desalination Yearbook, 2010)
0
1980
1990
2000
2010
year
LAWLER W., Desalination (2012)
Life Cycleconsumption
Energy
Electricity
Consumption in RO
Life cycle electricity consumption= 4.7 kWh/m 3
Water treatment
process
84% (3.9 kWh/m3)
Chemicals
production
2% (0.1 kWh/m3)
Intake pumping
7% (0.3 kWh/m3)
Plant construction
and membrane renewal
0% (0.02 kWh/m 3 )
Potable w ater distribution
7% (0.3 kWh/m3)
THERE IS NO MARKET FOR OLD RO MEMBRANES IN TERMS
OF ENERGY CONSUMPTION
VINCE F., Desalination (2008)
The methodology of membranes « reuse »
1st STEP : the unit manager observes an increased in the permeate
salinity (salts rejection decreased under 99%)
Each year between 12% to
25% of RO membranes are
renewed in industrial plants
2nd
STEP : Estimate the
level of degradation of the
isolated membranes
by pilot experiments
Pontié, Desalination, (2010)
100
120
Rejection (%)
Permeate Flow (L.h -1.m -2)
160
y = 4.6x
80
80
60
40
20
40
y = 1,6x
0,000
0
10
20
∆P (bar)
used
virgin
30
40
Pilot used to test
« old » membranes
(water tank 3 m3,
Module 8 in.= 37 m2
of membrane area)
VEZA JM, Desalination (2003)
0
0
10
20
30
∆P (bar)
used
virgin
*Rejection (%) :
R=100.(1-Cperm./Cbulk)
40
3nd STEP : Membrane autopsy (= destructives tests)
Autopsy experiments
In GEPEA (France)
PONTIE M., Desalination (2005)
Bench scale pilot
for laboratory
experiments
(membrane area
200 cm2)
3a- Membrane « reuse »
3aSecond or third life in WWT for isolates sites
Chemical attack to eliminate RO active layer
ultrathin barrier layer
in polyamide
= standardization of the
degradation
Old RO UF 10 kDa
0.3 -3 µm
40 µm
microporous
polysulfone
120 µm
Gravity filtration
with the « new »
UF Membrane in
isolated sites
reinforcing
fabric in
polysulfone
Old RO as “new” UF (10 kDa)
100
90
NaOCl 62500 ppm
NaOCl 6250 ppm
KMnO4
NaOH
Salt Rejection %
80
70
60
50
40
30
20
10
0
0
LAWLER W., JMS ( 2013)
200 000
400 000
Degradation Intensity (ppm.h)
600 000
3b-- RO old membrane « reuse » in desalination
3b
plants « as prepre-treatments » operations
PONTIE M., DESWATER, (2013)
4th STEP : Module DECONSTRUCTION
This work was inspired by :
JM Veza, JJ Rodriguez-Gonzalez, Second use for old RO
membranes : wastewaters treatment, Desalination, 157
(2003) 65
Michael Braungart et William MC Donough, “Cradle to
Cradle”, collection manifestô alternatives, march 2011
To replace « incineration »
by a « Mdolue
Deconstruction »
approach
RO Module constitutive « materials »
SWRO
Membrane
(surface area
37 m2)
7%
9%
42%
12%
Glues
Feed spacers
Fibreglass, casing
17%
13%
Permeate spacers
Permeate tube, end caps
Membrane sheets
% mass
PONTIE M. Energy and Sustainable
Developement, (2013)
Old RO permeate spacers as geotextile
Ashkelon, Israel
April 2009
OULD MOHAMEDOU E., Desalination (2010)
April 2014
Papirys, sheep skin or used membranes for illumination
THE SCRIBER
The Art of Middle Ages with old membrane today !
Conclusion & Perspectives
Yes we
can !
Old RO membrane REUSE for WWT, module
deconstruction, module materials end of life : a
Cradle to Grave approach,
a way to a Cradle to Cradle future.
Contact : [email protected]
Session 5 (ROOM A) : Resource management / Sustainability
112- Old RO membranes :
solutions of reuse in a Cradle
to Cradle approach
Thank you for attention !
*[email protected]
CYPRUS 11–15 May 2014, Conference and Exhibition on DESALINATION FOR THE
ENVIRONMENT: CLEAN WATER AND ENERGY Grand Resort Hotel, Limassol, Cyprus
Pe’ number filter-aid to estimate the convection
increasement in old RO
SKK model, 1966
old
Jv.Cconv.
Pe’ =
Jdiff.
virgin
Jdiff.
Pe’ = 0 Pure Diffusion
Pe’ > 1 Pure convection
Pe’ = 1 Diffusion = Convection
Permeate concentration of NaCl vs 1/Jv
( membranes NF90 and BW30, C= 0,1 M , T°=25°C, pH=6.7,
Y=5%)
Pe’ (virgin RO) = 0 ( Cconv.=0 )
Pe’ (used RO) = 1.3 -> 4 (10 30 bar)
Old RO as “new” NF
OULD MOHAMEDOU E., PONTIE M. et al., Desalination (2010)

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