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Wastewater reuse for agricultural irrigation: A comprehensive approach to the mitigation of the antibiotic resistance hazard
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Orientador(es)
Resumo(s)
Water scarcity is considered a serious worldwide problem and an important threat to the development of human societies. The agricultural sector alone accounts for the consumption of about 70 percent of the available freshwater on Earth, being the share of water withdrawal by agriculture still superior to 90 percent in multiple countries. In this context, wastewater reuse for agricultural irrigation comes up as a valuable and
sustainable alternative. However, the safety of this practice is still a matter of great concern, since the conventionally applied wastewater treatments are inefficient in the removal of different contaminants of emerging concern, such as antibiotic resistant bacteria and genes, from the treated effluents. Therefore, this thesis performed an assessment on the presence, persistence and characterization of last-line antibiotic
resistant bacteria and corresponding resistance genes, from the produced wastewater influents to the reused streams, in two Portuguese full-scale wastewater treatment plants, followed by the application of an additional nanofiltration treatment step to test the removal efficiencies of these antibiotic-related pollutants for the subsequent production of high-quality effluents that could be more safely reused.
Descrição
Palavras-chave
wastewater bacteria