A study on near zero liquid discharge approach for the treatment of reverse osmosis membrane concentrate by electrodialysis

Environmental Technology
Cigdem Balcik-CanbolatBulent Keskinler

Abstract

A lab-scale electrodialysis (ED) which consisted of 11 pieces of cation-exchange membranes and 10 pieces of anion-exchange membranes was used to treat concentrated brine of Reverse osmosis (RO) membrane. The effect of operating parameters such as applied voltage, flowrate, and operating mode was investigated to measure the performance of a lab-scale ED. Three different voltages (5, 10, and 15 V) and flowrates (20, 30, and 40 L/h) were applied in order to optimize the operating conditions of the ED system. The maximum TDS removal efficiencies were 85%, 97%, and 98% for 5, 10, and 15 V, respectively. It was concluded that the desalination efficiencies were almost the same at flowrates values of 20, 30 and 40 L/h. The TDS concentration of the treated brine in the concentrate compartment rises to the highest value of 25,400 mg/L with desalination rate of 92.5% after five cycle operation. Moreover, the desalinated brine can be used as fresh water.

References

Jan 30, 2003·Water Research·Hong-Joo LeeSeung-Hyeon Moon
Nov 8, 2011·Journal of Environmental Management·Akshaya Kumar VermaPuspendu Bhunia
Feb 14, 2012·Journal of Hazardous Materials·E Alventosa-deLaraM I Iborra-Clar
Aug 2, 2017·Water Research·Emma Thompson BrewsterDamien J Batstone
Feb 20, 2018·Water Research·Andrew J WardDamien J Batstone

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Citations

Aug 29, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Cigdem Balcik-CanbolatBulent Keskinler

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Methods Mentioned

BETA
PCA
X-Ray

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