Electrodialysis desalination and limiting concentration of highly mineralized waters

TitleElectrodialysis desalination and limiting concentration of highly mineralized waters
Publication TypeJournal Article
Year of Publication2020
AuthorsKucheruk, DD, Deremeshko, LA, Balakina, MN, Pischay, IY, Remez, SV, Goncharuk, VV
Abbreviated Key TitleDopov. Nac. akad. nauk Ukr.
Date Published12/2020

We study the regularities of the process of desalination of sodium chloride solutions with a limiting concentration of 10.2 to 37.7 g/dm3, which simulate chloride wastewater of some mining enterprises. We use an electrodializerconcentrator with advanced design developed at A.V. Dumansky Institute of Colloid Chemistry and Water Chemistry of the NASU. The need to develop such device is caused by the necessity of the deep concentration of concentrates obtained during the wastewater treatment in order to facilitate their further processing into secondary material resources. The electrodialyzers produced by the industry are unsuitable for a significant concentration, since the concentration chambers in such devices and the desalination chambers are pumped with the initial solution. This leads to a significant reduction in the concentration of the resulting brine. Studies have shown that the use of the specified electrodializer-concentrator allowed one to obtain for 100 min from solutions with a concentration of 10.2, 18.8, and 37.7 g/dm3 Cl-ion diluents containing them, respectively, 0.2, 0.6, and 1.0 g/dm3 and to concentrate the brine by 10.6, 6.7, and 4.0 times, respectively. Based on this research and the experience gained at the Institute in the field of mine water treatment, a basic block diagram of the mine water treatment is developed. It is based on a combination of advanced electroodialysis and reverse osmosis. The complex processing of substances removed during the mine water treatment involves their use in relevant industries; additional desalination diluent can be used for technical purposes, and its excess is discharged into reservoirs.

Keywordsbrine, concentrating, desalting, diluate, electrodialysis, mine waters

1. Pervov, A. G., Chukhin, V. A. & Mikhailin, A. V. (2012). Calculation, design and application of electro dialy sis (electromembrane) installations for water demineralization. Moscow: MGSU (in Russian).
2. Pilat, B. V. (2004). Basics of electrodialysis. Moscow: Avvalon (in Russian).
3. Balakina, M. N. (2015). Electrodialysis in the complex processing of leachate from solid waste landfills. Himiya i tehnologiya vody, 37, No. 4, pp. 331-341 (in Russian).
4. Deremeshko, L. A, Balakina, M. M, Seminska, O. O, Кucheruk, D. D. & Goncharuk, V. V. (2020). Desalination of chloride-sulfate brackish water with an electrodialyzer with improved design. Energy Technologies & Resource Saving, No. 1, pp. 52-58 (in Ukrainian). https://doi.org/10.33070/etars.1.2020.7
5. DSTU ISO 9297:2007. Water quality. Determination of chlorides. Titration with silver nitrate using chromate as an indicator (Mora method). Kyiv, 2010 (in Ukrainian).
6. Rules of acceptance of sewage of the enterprises in municipal and departmental systems of the sewerage of settlements of Ukraine: approved by the Order of the State Construction Committee of Ukraine dated 19.02.2015 No. 37 (in Ukrainian).
7. Pilipenko, A. T., Goronovskiy, I. T., Grebenyuk, V. G., Zapolskyi, A. K., Kucheruk, D. D., Maksin, V. I., Rud, A. M. & Zagorodnyuk, A. K. (1985). Complex processing of mine waters. Kyiv: Tekhnika (in Russian).
8. Levchenko, E. S. (2017). Desalination of open pit and mine waters in the conditions of Kryvbas. Geotex - ni chna mexanika, No. 132. pp. 220-228 (in Russian).
9. Shuryberko, M. M. (2020). Water conditioning for resource-efficient ecologically safe water circulation systems (Extended abstract of Doctor thesis). National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine (in Ukrainian).
10. Mokrinskaya, G. N. & Milova, G. N. (2011). Water softening by the method of sodium cationization. Santekhnika. Otoplenie. Kondicionirovanie, No. 4, pp. 37-41 (in Russian).