Deionization / DesEL

Water deionization has never been easier.

The DesEL system is a cost-effective process to remove ions from water or to concentrate dilute solutions. In removing ions, DesEL provides water recovery as high as 97% and requires less maintenance than conventional systems. That is why life cycle costing singles out DesEL as the system of choice.

DesEL can be configured for broad removal of total dissolved solids or preferential removal of monovalent ions such as nitrate. Both these configurations can also be used for concentrating dilute solutions.

Independent testing of the DesEL system has demonstrated its capabilities. The tests targeted 85% removal of specific compounds added separately to tap water. As shown below, the target was achieved in all cases.

Spike	Concentration ml/g	Removal %
Arsenic	0.6	75-85%
Fluoride	1.4	>95%
Perchlorate	0.5	>95%
Nitrate	100	90-95%
Sulphate	150	>90%
Lead	0.05	80-90%
Copper	1000	85%

TDS	20,000	90%
Source: Material Methods LLC

DesEL offers high water recovery

The high water recovery of the DesEL system makes it especially attractive in areas of limited water supply. For example, a wastewater volume of only 3% was obtained during the treatment of groundwater where the hardness decreased 81% and the conductivity decreased 70%.

		Input	Treated	Concentrate
Recovery	%		97%	-
Waste	%		-	3%
Conductivity	µS/cm	324	97.4	4370
Hardness	mg/L	76	14
pH		7.8	7.5

Other advantages of the DesEL system include:

High precision of treatment
Low energy consumption per treated volume i.e. Less than 0.5 kWh/m 3 for TDS < 1000 mg/L
Free of chemical additives
Lifetime of electrodes estimated at 8 to 10 years
Effective over wide range of TDS conditions