Feammox Bacterial Biofilms as an Alternative Biological Process for the Removal of Nitrogen from Agricultural Wastewater

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dc.contributor.authorCerda, Ambar
dc.contributor.authorGonzalez, Macarena
dc.contributor.authorRodriguez, Carolina
dc.contributor.authorSerrano, Jennyfer
dc.contributor.authorLeiva, Eduardo
dc.date.accessioned2025-01-20T20:16:20Z
dc.date.available2025-01-20T20:16:20Z
dc.date.issued2023
dc.description.abstractThe excessive deposition of ammonium (reactive nitrogen) in the environment has led to losses of biodiversity and the eutrophication of ecosystems. Anthropogenic sources contribute twice the natural rate of terrestrial reactive nitrogen and provide about 45% of the total amount of it produced annually on Earth. Recently, a biological process that anaerobically metabolizes ammonium and facilitates iron reduction, termed Feammox, was discovered. The use of Feammox activity together with hollow fiber membrane bioreactors (HFMB), for which the latter are based on the formation of biofilms of bacterial communities, constitutes an efficient and sustainable method for the removal of ammonium from agriculturally derived wastewater. To implement the use of HFMB with Feammox activity, the formation of Feammox bacterial biofilms from wastewater sludge samples from a brewery was evaluated. The cultures were enriched with two different carbon sources, namely, sodium acetate and sodium bicarbonate; then, ferrous iron and ammonium concentrations, which were used as indicators of reactive nitrogen removal, were measured. The measurements revealed that the ammonium removal level reaches 20.4% when sodium acetate is used as carbon source. Moreover, an increase in the ferrous iron concentration of +Delta 84.6 mg/L was observed, indicating that Feammox activity had been generated. Biofilm formation was observed under Feammox conditions on the hollow fibers. These results showed that Feammox bacteria can form biofilms and efficiently remove ammonium from wastewater, constituting an essential feature with which to scale up the process to HFMBs. Overall, these results contribute to a better understanding of the Feammox process that can be used to implement these processes in agriculture and thus progress towards a more sustainable industry.
dc.fuente.origenWOS
dc.identifier.doi10.3390/agriculture13030728
dc.identifier.eissn2077-0472
dc.identifier.urihttps://doi.org/10.3390/agriculture13030728
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92322
dc.identifier.wosidWOS:000952889400001
dc.issue.numero3
dc.language.isoen
dc.revistaAgriculture-basel
dc.rightsacceso restringido
dc.subjectFeammox
dc.subjectbiofilms
dc.subjectnitrogen removal
dc.subjectreactive nitrogen
dc.subjectammonium
dc.subjectiron
dc.subjectagricultural nitrogen
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleFeammox Bacterial Biofilms as an Alternative Biological Process for the Removal of Nitrogen from Agricultural Wastewater
dc.typeartículo
dc.volumen13
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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