ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Recarbonization of drinking water in fluidized-bed reactor
Ján Derco, Anna Luptáková, Jozef Dudáš, and Martin Vrabeľ
Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic
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.
Keywords: Drinking water; Fluidised bed reactor; Half-calcined dolomite; Mineral deficiency; Recarbonization; Water quality improvement
Full paper is available at www.springerlink.com.
Chemical Papers 71 (9) 1771–1779 (2017)
Wednesday, August 10, 2022