Evoqua offers Ionpure continuous electro-deionisation modules

Benefits include improved water quality and more accurate performance prediction

The Ionpure continuous electro-deionisation (CEDI) VNX module allows system builders to adjust the product flow rate in a water purification system

Evoqua Water Technologies’ Ionpure continuous electro-deionisation (CEDI) VNX and LX modules allow system builders to optimise plant design by adjusting the number of CEDI modules, or the product flow rate, in a water purification system.

Advantages include improved water quality, reduced costs and more accurate performance prediction, the US-based firm says.

Driven by the increasing water purity requirements of the power and microelectronics industries, the new changes to the VNX and LX product lines ensure that the system design benefits apply in high- and low-flow situations and in all CEDI applications, including pharmaceuticals, food and beverage processes.

When integrating CEDI to achieve a certain quality and quantity of pure water output, system designers can use the enhanced performance modules to either run fewer modules above nominal flow rate, or run more modules below nominal flow rate.

This flexibility applies even when the CEDI stage receives a low quality feed from the system upstream. With weakly ionised species such as CO2 and silica in the supply, feed water conductivity equivalent (FCE) can be as high as 40µS/cm.

The IP-Pro CEDI projection tool has been updated to reflect the enhanced performance changes. IP-Pro 2.2.1 software models the actual performance increase at nominal and maximum flow rates and gives a more accurate performance projection for modules operating below their nominal flow rate.

Enhanced performance LX modules also benefit from power reduction technology, already introduced to VNX module design. The result is a minimum 35% reduction in power consumption in comparison with earlier LX modules.