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Title: CORRECTION OF THE CHEMICAL COMPOSITION OF THE WASHING WATERS RECEIVED AS A RESULT OF H CATION EXCHANGE OF ION- EXCHANGE RESIN
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CORRECTION OF THE CHEMICAL COMPOSITION OF THE WASHING WATERS RECEIVED AS A RESULT OF H CATION EXCHANGE OF ION- EXCHANGE RESIN
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1314-2704
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English
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19
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5.1
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Increasing production scale and demand highlights the necessity of industrial waste water purification. Such water, except for harmful impurities that pollute environment ecologically, contain substances whose return into the production cycle makes the production process more economical. From this point of view, purification and concentration of water generated after the regeneration of cationites used in the process of water treatment, is more relevant. Lot of productions, such as energy, electronic, radio technology and others, use large amount of not desalinated water. Water desalination is successfully carried out by sorption-based methods.
The purpose of our work was to study the possibility of maximum concentration of residual hydrochloric acid of the cationite regeneration (H-cationiting) process by the electrodialysis method and to select the optimal technological modes to return the concentrate into the production cycle. The possibility of waste water purification, produced as a result of cation regeneration (H-cation) is studied by electrodialysis method. The research was conducted on the filter-press type electrodialysis plant. The electrodialysis plant consisted of two platinized titanium electrodes and a membrane packet that was composed of cationic MK-40 and anionic MA-40 type of ionic exchange membranes. Consequently, interchanging process of dialysate (desalination) and acid concentration units was created in the plant. The number of membranes and their work area in the plant consisted of 200 units and 32.8 m2 accordingly. The object of research was 1% hydrochloric acid solution. The four hydraulic modes of supplying initial solution with different ratios (1: 1; 3: 2; 13: 1; 1: 0) into the dialysate and concentration sections of electrodialysis plant are discussed. For each hydraulic regime, optimal electrical regime, the depth of water desalination and concentration levels, process energy consumption, productivity of the device and product output according to power have been discussed according to the voltage change on the device. The regularities for desalination depth and concentration quality changes are determined depending on the process energy consumption. The optimal technological regime for waste water purification and its residual acid maximally concentration is selected: The initial water flow ratio in dialysate and concentration chambers is 13:1; therefore, the voltage supplied to the device is 180-200V; the concentration of hydrochloric acid is 5%, which is sufficient for cation regeneration; residual concentration of hydrochloric acid in the dialysate chamber is 0,05%, that will significantly reduce the expense of alkali, that nowadays is used for industrial waste water neutralization. Thus, the conducted experiment demonstrated that in case of using sorption method in water treatment system for water softening, it is recommended to concentrate the residual acid, present in waste waters, by electrodialysis method and to return it into the production cycle, which makes the sorption method for water softening way more ecological and economical. |
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conference
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19th International Multidisciplinary Scientific GeoConference SGEM 2019
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19th International Multidisciplinary Scientific GeoConference SGEM 2019, 30 June - 6 July, 2019
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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133-140
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30 June - 6 July, 2019
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website
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cdrom
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5967
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waste water; membrane; electrodialysis
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