Biological Removal of Micropollutants in Human Supply Water Samples Using Nitrifying and Denitrifying Bacteria
2020
de Jesus, Jaqueline Souza | de Aguiar Junior, Terencio Rebello
Several regions of the world suffer from water quality degradation caused mainly by anthropogenic interference, domestic sewage discharge, industrial discharges, and contaminants from agricultural activities, which increase the amount of nutrients into water such as nitrogen and phosphorus intensifying the process of eutrophication. Considered as one of the main problems faced by supply water sources in the world, eutrophication represents a global phenomenon that also affects the socioeconomic and environmental sector. In the present study, a bacterial pool formed by the Nitrosomonas europae, Nitrobacter winogradskyi, and Paracoccus denitrificans strains was used to remove the compounds NH₃, NO₂⁻, NO₃⁻, P, and PO₄³⁻, real water samples from human supply at time 0 to 24 h. At the final time (24 h), the bacterial pool obtained total removal (100%) of all compounds analyzed. With the removal of nutrients from water, there was also reduction in the amount cyanobacteria and saxitoxins of water. Thus, the bacterial pool can be applied as a remediators of micropollutants such as compounds N and P, since their performance in removel the compounds was satisfactory. The removal of micropollutants from water bodies aims to decrease the nutrients responsible for cyanobacteria blooms, eutrophication, as well as improve water quality, optimize, and reduce water treatment costs, benefiting both the aquatic ecosystem and human health.
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