ELECTRODEIONIZATION WATER TREATMENT SYSTEMS for Lab., Sanitary injection or boiler feed

Electrodeionization (EDI) is used after reverse osmosis for polishing of demineralized water to obtain low levels of conductivity and silica. The EDI uses ion exchange membranes, ion exchange resins and electricity to produce high-quality water with no regeneration downtime. EDI is an alternative to a conventional mixed bed polisher.

Typical applications for EDI are boiler feedwater at heat and power plants, process water within the electronic industry, the pharmaceutical industry, hospitals and laboratories.

Our EDI product programme comprises 14 standard modules with flow rates up to 60 m³/h. Each series is designed with high-quality components for maximum reliability and easy maintenance.

Based on the standard design, we also offer extended features for more automation and safety. Please contact us for more information on the extended features.

Ultrapure process water

EDI after reverse osmosis supplies ultrapure process water with low conductivity. The photo shows EDI for ultrapure water at a microelectronic company. The EDI is customized with special pharma modules for a hygienic design.

Water for pharma

Purified water production within pharma industries requires a water treatment system in a hygienic design. The EDI is customized to meet the current versions of European and United States Pharmacopoeia (USP, Ph. Eur.).

Water for power plant

Instead of using a conventional mixed bed, a membrane degasser in combination with EDI can produce high-quality demineralized water without using any chemicals. This provides corrosion-free boiler feedwater with low conductivity and silica content.

FEED WATER SPECIFICATIONS

• Feed Water Conductivity Equivalent, including CO2
  and Silica: < 40 µS/cm
• Feed Water Source: RO permeate
• Temperature: 41 – 113 °F (5 – 45 °C)
• Inlet Pressure: = 100 psi (6.9 bar)
• Maximum Total Chlorine (as Cl): < 0.02 ppm
• Iron (as Fe): < 0.01 ppm
• Manganese (as Mn): < 0.01 ppm
• Sulfide (S2-): < 0.01 ppm
• pH: 4 – 11
• Total Hardness (as CaCO3): < 1.0 ppm
• Dissolved Organics (TOC as C): < 0.5 ppm
• Silica (SiO2): < 1.0 ppm