The EDR is a kind of ED system, which is operated by periodically changing its polarity to provide better, more cost-effective performance and maintenance work compared to those of conventional ED (Figure 6).
High water recovery
Scale deposit can be prevented
Improves the durability of membranes.
Saves power consumption.
Desalination ratio of raw water can be easily controlled.
Water with a high level of SiO
2 can be treated without forming
precipitation on ion exchange membrane.
・The desalination and removal of hardness component from underground water
・Removal of nitrate nitrogen from underground water