The main problems of ground water for drinking purposes in Lithuania include the increased concentration of iron, ammonium and manganese compounds. Organic compounds have the main impact on removing iron, ammonium and manganese compounds. The coagulation process is employed for removing organic compounds. Along with the removal of organic compounds, iron, ammonium and manganese compounds can be taken away in a more efficient way. Different filter media could be used for removing iron, ammonium and manganese. The purpose of research was to evaluate removal effectiveness of iron, ammonium, manganese and organic compounds applying different types of filter medium (quartz sand, zeolite, Birm and quartz sand from an active filter). The conducted research has showed that all tested filter media (Birm, zeolite, quartz sand and quartz sand from the active filter) effectively remove iron compounds (up to 99%). The efficiency of removing ammonium ions may reach 99% for Zeolite and 95% for quartz sand from the active filter. When using quartz sand from the active filter as filter medium, up to 85% removal efficiency for manganese ions was reached.

Article in Lithuanian