For best quality water, lowest use of chemicals and minimum waste water then CounterCurrent Ion Exchange usingPacked Beds is the process of choice.

Upflow Service/Downflow Regeneration

40+ years operating experience in Europe with over 4,000 installations has proven this technique to be the best. Downflow regeneration provides optimum distribution and rinsing of the denser acid and caustic. This advantage is overlooked in systems using upflow regeneration. Upflow service packs the resin into Primary and Polishing zones. The packing rate and service flow turndown ratio are easy to control and maintain.

Best Water Quality

The wide band Polishing zone of highly regenerated resin separated from the outlet collector with a layer if inert resin separated from the outlet collector with a layer of inert resin provides consistent near Mixed Bed quality water. Packed Beds have a TDS removal efficiency of >99.9% vs about 95% for RO. Packed Bed conductivity can be as low as 0.5 microsiemens per centimeter and SiO2 of <20 ppb, so in some cases Mixed Bed Polishers can be eliminated. RO will almost always require Mixed Beds to give comparable quality. If Polishers are needed Packed Beds can increase their run length by more than 5 times compared to conventional ion exchange and over 10 time vs RO.

Lowest Chemical Consumption

Superior regenerant distribution and the use of weak and strong resin grades in separate compartments in the same vessel can reduce the chemicals to as little as 115% of stoicheometric vs well over 200% for conventional ion exchange.

Minimum Waste Volume/High Water Recovery

Efficient use of chemicals with vessels designed to reduce hideout along with downflow regeneration reduce displacement rinse water. Final rinse cycle, in a closed loop, is used so no final rinse water goes to the neutralizing system. Waste generated is as low as 2% of the total water treated. Compare this to over 10% for convential ion exchange and 25% waste water for RO.

System Modernization

Improve water quality and increase capacity of your existing demineralizer with a System Modernization from Ecodyne. Return on investment may be justified by reduced waste volumes and chemical savings alone.

Note: The above data is representative only and may not apply to all applications. Please contact Ecodyne for specific data on your project.

Packed Bed System Photographs