Continuous Electrodeionisation (CEDI)
EDI system combining ion exchange resins and ion-selective membranes with a current for high-purity water production.
What is Continuous Electrodeionisation (CEDI)?
Electrodeionisation (EDI) is a high-efficiency water demineralisation process. Systems use electricity, resins and ion exchange membranes to separate dissolved impurities (ions) from water. Continuous electrodeionisation (CEDI) means that the electric current continuously regenerates the required resin mass.
CEDI Water Treatment Systems
Veolia Water Technologies' CEDI systems avoid issues with exhausted resin beds requiring regeneration or replacement. CEDI systems don't require any water treatment chemicals and they provide a consistent flow of high-quality water, suitable for many applications. Reverse osmosis (RO) water treatment systems are typically used prior to CEDI to ensure that the CEDI system is not overloaded with high levels of salts.
CEDI Applications and Benefits
CEDI process water systems are used in a wide range of applications and industries:
- Food and beverage
- Chemical processing
The key benefits of CEDI in these applications include:
- Chemical-free water treatment
- Continuous water flow with consistent, known water quality
- Zero resin bed regeneration downtime
- Fast system installation and startup
- Standardised systems mean short lead times
- Flexible system design with high flow rates