RT Journal Article
T1 Application of anammox-based processes in urban WWTPs: are we on the right track?
A1 Pedrouso Fuentes, Alba
A1 Vázquez Padín, José Ramón
A1 Crutchik, Dafne
A1 Campos Gómez, José Luis
K1 Autotrophic nitrogen removal
K1 Effluent quality
K1 Energy efficiency
K1 Mainstream
K1 Nitritation
K1 Sludge thermal hydrolysis
AB The application of partial nitritation and anammox processes (PN/A) to remove nitrogen can improve the energy efficiency of wastewater treatment plants (WWTPs) as well as diminish their operational costs. However, there are still several limitations that are preventing the widespread application of PN/A processes in urban WWTPs such as: (a) the loss of performance stability of the PN/A units operated at the sludge line, when the sludge is thermally pretreated to increase biogas production; (b) the proliferation of nitrite-oxidizing bacteria (NOB) in the mainstream; and (c) the maintenance of a suitable effluent quality in the mainstream. In this work, different operational strategies to overcome these limitations were modelled and analyzed. In WWTPs whose sludge is thermically hydrolyzed, the implementation of an anerobic treatment before the PN/A unit is the best alternative, from an economic point of view, to maintain the stable performance of this unit. In order to apply the PN/A process in the mainstream, the growth of ammonia-oxidizing bacteria (AOB) should be promoted in the sludge line by supplying extra sludge to the anaerobic digesters. The AOB generated would be applied to the water line to partially oxidize ammonia, and the anammox process would then be carried out. Excess nitrate generated by anammox bacteria and/or NOB can be removed by recycling a fraction of the WWTP effluent to the biological reactor to promote its denitrification
PB MDPI
YR 2021
FD 2021
LK http://hdl.handle.net/10347/27637
UL http://hdl.handle.net/10347/27637
LA eng
NO Processes 2021, 9, 1334. https://doi.org/10.3390/pr9081334
NO This research was funded by the Chilean Government through the Projects ANID/FONDECYT/1200850 and CRHIAM Centre grant number ANID/FONDAP/15130015. FCC Aqualia, S.A. as coordinator of the LIFE ZERO WASTE WATER consortium would like to thank the European Commission for its support through LIFE financial instrument LIFE19ENV/ES/000631
DS Minerva
RD 28 abr 2026