RT Journal Article
T1 Enhanced ammonia removal at room temperature by pH controlled partial nitrification and subsequent anaerobic ammonium oxidation
A1 Durán, Ulises
A1 Val del Río, Ángeles
A1 Campos Gómez, José Luis
A1 Mosquera Corral, Anuska
A1 Méndez Pampín, Ramón José
K1 Ammonium/inorganic carbon (NH4+/IC) ratio
K1 Anammox
K1 Free ammonia (FA)
K1 Free nitrous acid (FNA)
K1 Partial nitrification
AB The Anammox based processes are suitable for the treatment of wastewaters characterized by a low carbon to nitrogen (C/N) ratio. The application of the Anammox process requires the availability of an effluent with a NO2--N/NH4+-N ratio composition around 1 g·g-1, which involves the necessity of a previous step where the partial nitrification is performed. In this step the inhibition of the nitrite oxidizing bacteria (NOB) is crucial. In the present work a combined partial nitrification-Anammox two units system operated at room temperature (20 ºC) has been tested for the nitrogen removal of pre-treated pig slurry. To achieve the successful partial nitrification and inhibit the NOB activity different ammonium/inorganic carbon (NH4+/IC) ratios were assayed from 1.19 to 0.82 g NH4+-N·g-1 HCO3-C. This procedure provoked a decrease of the pH value to 6.0 to regulate the inhibitory effect over ammonia oxidizing bacteria (AOB) caused by free ammonia (FA). Simultaneously the NOB experienced the inhibitory effect of free nitrous acid (FNA) which avoided the presence of nitrate in the effluent. The NH4+/IC ratio which allowed the obtaining of the desired effluent composition (50% of both ammonium and nitrite) was of 0.82±0.02 g NH4+-N g-1 HCO3--C. The Anammox reactor was fed with the effluent of the partial nitrification unit containing a NO2--N/ NH4+-N ratio of 1 g·g-1 where a nitrogen loading rate (NLR) of 0.1 g N·L-1·d-1 was efficiently removed
PB Taylor & Francis
SN 0959-3330
YR 2014
FD 2014
LK http://hdl.handle.net/10347/15741
UL http://hdl.handle.net/10347/15741
LA eng
NO U. Durán, A. Val del Río, J.L. Campos, A. Mosquera-Corral & R. Méndez (2014) Enhanced ammonia removal at room temperature by pH controlled partial nitrification and subsequent anaerobic ammonium oxidation, Environmental Technology, 35:4, 383-390, DOI: 10.1080/09593330.2013.829110
NO This is the post-print reviewed version of the following article: U. Durán, A. Val del Río, J.L. Campos, A. Mosquera-Corral & R. Méndez (2014) Enhanced ammonia removal at room temperature by pH controlled partial nitrification and subsequent anaerobic ammonium oxidation, Environmental Technology, 35:4, 383-390, DOI: 10.1080/09593330.2013.829110, which has been published in final form at  http://dx.doi.org/10.1080/09593330.2013.829110. This article may be used for non-commercial purposes
NO This work was supported by CONACyT-México economic support [grant number 147817]; Xunta de Galicia [grant number10MDS265003PR]
DS Minerva
RD 28 abr 2026