In recent decades, we have become increasingly aware of the presence of micropollutants in wastewater. Existing wastewater treatment technologies are not sufficiently effective at removing these substances. As a result, they accumulate in the environment in high concentrations, where they can harm aquatic organisms and indirectly affect humans. Concerns about the negative effects of micropollutants in the environment have prompted the revision of the 1991 Urban Wastewater Treatment Directive. As part of this thesis, we compared the current effectiveness of micropollutant removal at the Domžale-Kamnik Wastewater Treatment Plant with the requirements of the revised directive. We reviewed some possible options for quaternary treatment. We then focused on the use of advanced oxidation processes, specifically ozonation, for the removal of the recalcitrant antibiotic amoxicillin. We were most interested in the effectiveness of treatment in terms of changes in chemical oxygen demand and total organic carbon content. We compared effectiveness at different ozone flow rates and found that amoxicillin does not degrade faster at higher flow rates.
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