Comparing the methods of reverse osmosis and electrodialysis in the process of natural and waste water demineralization

Summary

Water demineralization plays a key role in various industries, including energy, chemical and food industries, as well as in wastewater treatment to provide for a closed water recycling systems. The main methods of demineralization are reverse osmosis and electrodialysis. A comparative analysis of these methods is carried out in terms of their efficiency, cost-effectiveness, environmental safety and applicability in wastewater treatment. Particular attention is paid to the mechanism of the processes, energy costs, operational characteristics and requirements to water pre-treatment. Three key criteria are established needed to compare both methods considered: the need for water pre-treatment, the membrane replacement frequency, and the energy intensity of the process.

Key words

wastewater treatment , reverse osmosis , demineralization , electrodialysis , environmental aspects , impulse current