ELECTROMEMBRANE TECHNOLOGY
AND MODULAR WATER DESALINATION DEVICE
APPLIED RESEARCH • WATERPOLUTION PREVENTION
Description
Water Desalination Device is based on a combination of sorp(cid:2)
tion and membrane technologies or ion exchange assisted
electrodialysis. All the components of the device are produced
from inorganic materials, durable and stable to toxication and
fouling.
Employment of ceramic(cid:2)based membranes is getting more
and more attention due to reduced cost, high recoveries, sta(cid:2)
bility, and easy maintenance. The proposed macro(cid:2)porous alu(cid:2)
mina membranes with sorption(cid:2)active coatings provide cheap
water desalination and meet national drinking water stan(cid:2)
dards. The composite membrane consists of a porous Al2O3
– ZrO2 – Y2O3 based support and a zirconium dioxide or
hydrated phosphate top layer about 3 to 1 μm thick.
Due to the layer’ sorption ability, bivalent metal ions can be
efficiently removed from water, resulting in cancellation of an
ion(cid:2)exchange stage in the water conditioning process. In the
course of the investigation, additional amorphous carbon or
carbide layers will be applied inside the support to improve
performance characteristics of the membranes.
Sleep(cid:2)casting technology, sol(cid:2)gel multi(cid:2)step processes, and
gas(cid:2)phase deposition were used for membrane formation.
Innovative Aspect and Main Advantages
The efficiency of water purification /desalination process is
provided by several factors including:
• ion exchange column is divided into chambers of desalina(cid:2)
tion and brine chambers
• intermembrane filling comprises of ion exchanger with
advanced uptake and mass transfer properties
• ceramic membranes are modified with sol of zirconia
• new composite oxide sorbents
The positive results on water desalination using combined ion
exchange assisted electrodialysis with novel oxide materials
are obtained. Desalination ratio data was obtained for water
with varied mineral salts content.
The inorganic materials based on oxides of multivalent ele(cid:2)
ments, namely Al, Mn, Ti, Zr and Si are selected for processing
of weak electrolyte solutions, namely hydrated oxides of Zr, Mn
and Ti are proposed, which are optimal in combination of
cation (cid:2) and anion(cid:2)exchange functions.
New composite oxide sorbents are designed. Pilot stacks of
sorbents are synthesized and studied on sustainability;
The better among them are:
Al2O3·x MnO2·xnH2O (3:1)
SnO2·xAl2O3·xnH2O (1:1)
TiO2·xMnO2·xnH2O (3:1)
cell is specified;
Areas ooff Application
Production of portable water from brackish water (1(cid:2)3 g/l) for
small to medium size private, agricultural, or municipal water
consumers.
Fig.1 Electromembrane installation
Fig. 2 Water desalination Fig. 3 Pilot plant
scheme assembly
Stage ooff Development
Ukrainian patents are in process.
Pilot prototypes are available. Contact Details
Contact person: Byelyakov Volodymyr, Dr.Sci
Institute of General & Inorganic Chemistry of the Ukrainian
national Academy of Science
Address: 30(cid:2)32 Paladin Prosp, Kiev, Ukraine
Tel/Fax: (380(cid:2)44) 424 04 62/424 30 70
E(cid:2)mail: : v(cid:2)bel@mail.kar.net
INNOVATIVETECHNOLOGY OPPORTUNITIES FROM THE STCU
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