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Recarbonization of drinking water in fluidized-bed reactor

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Abstract

Investigation of drinking-water recarbonization process is the main aim of this work. Experiments aimed at increasing of Ca2+ and Mg2+ in water were carried out in laboratory scale fluidized-bed reactor. This technique offers potential for increasing of reaction surface area and overall reaction rate, and represents a new approach in drinking-water industry. Measurements of hydraulic characteristics of the fluidized bed were performed. The results of comparison of two different recarbonization agents, dolomite and half-calcined dolomite, show that half-calcined dolomite is more efficient for increasing concentration of Ca2+ and Mg2+ from value below the recommended limit to 3.4 mmol L−1. Effect of carbon dioxide on enrichment of water by calcium and magnesium was also investigated and positive effect was observed. Concentration of Ca2+ and Mg2+ with CO2 present was increased by factor 2.6 in comparison without addition of CO2 to the system at the same conditions. The use of fluidized-bed reactor resulted in significantly higher remineralization rate in comparison with static filtration column.

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Acknowledgements

This work was supported by the Slovak Research and Development Agency under the Contract No. APVV-0656-12. The authors wish to thank the support from VEGA Grant 1/0859/14.

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Authors and Affiliations

  1. Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovak Republic

    Ján Derco, Anna Luptáková, Jozef Dudáš & Martin Vrabeľ

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  1. Ján Derco
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  2. Anna Luptáková
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  3. Jozef Dudáš
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  4. Martin Vrabeľ
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Correspondence to Ján Derco.

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Derco, J., Luptáková, A., Dudáš, J. et al. Recarbonization of drinking water in fluidized-bed reactor. Chem. Pap. 71, 1771–1779 (2017). https://doi.org/10.1007/s11696-017-0173-0

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  • DOI: https://doi.org/10.1007/s11696-017-0173-0

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