Importance of calcium and magnesium in water - water hardening

1st International Conference on Advances in Environmental Engineering

生态环境科学

Barloková, D.^1 ; Ilavský, J.^1 ; Kapusta, O.^2 ; Šimko, V.^3

Department of Sanitary and Environmental Engineering, Faculty of Civil Engineering STU, Radlinského 11, Bratislava

810 05, Slovakia^1

Central Slovak Water Company, Partizánska cesta 5, Banská Bystrica

974 01, Slovakia^2

Water Progress, Raianske mýto 10990/1C, Bratislava

831 02, Slovakia^3

关键词: Calcium and magnesiums;    Calcium concentration;    Filtration rates;    Human health;    Pilot plant experiments;    Process line;    Water contacts;    Water supply distribution systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/92/1/012002/pdf
DOI  :  10.1088/1755-1315/92/1/012002

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Basic information about importance of calcium and magnesium in water, about their properties, effect to human health, problems what can cause under the lower ( 5 mmol/L) concentrations in water supply distribution systems, the most commonly used methods of water hardening are presented. The article contains the water hardening results carried out during the pilot plant experiments in WTP Hriová and WTP Turek. For water hardening, treated water at the end of the process line, i.e., after coagulation, sedimentation and filtration, saturated with CO2and filtrated through half-burnt dolomite material (PVD) was used. The results show that the filtration rate is 17.1 m/h in the case of WTP Hriová and 15.2 m/h in the case of WTP Turek to achieve the recommended concentration of Ca and Mg in the treated water after the addition of CO2and filtration through PVD. The longer the water contact time with PVD (depending on the CO2content), the more water is enriched with magnesium, but the calcium concentration has not so much increased.