Partial Nitrification-Anammox system in the presence of organic matter: adaptation strategy

Constanza Arriagada; Víctor Guzmán-Fierro; Elisa Giustinianovich; Luz Alejo-Alvarez; Jack Behar; Víctor Campos; Katherina Fernández; Marlene D. Roeckel

Keywords: partial nitrification, anammox, Organic matter adaptation, SNAD, NOB.


Poultry manure contains high levels of ammonia that result in a suboptimal bioconversion to methane in anaerobic digesters (AD). A simultaneous process of nitrification, Anammox and denitrification (SNAD) in a continuous granular bubble column reactor to treat the anaerobically digested poultry manure was implemented. Thus, two strategies to reach high efficiencies were proposed in this study: 1) ammonia overload to suppress nitrite oxidizing bacteria (NOB) and 2) Gradual adaptation of the partial nitrification-Anammox (PN-A) biomass to organic matter. During the NOB-suppression stage, microbial and physical biomass characterizations were performed and the NOB abundance decreased from 31.3% to 3.3%. During the adaptation stage, with a nitrogen loading rate of 0.34 g L-1d-1, a hydraulic retention time of 1.24 d and an influent COD/N ratio of 2.63 ± 0.02, a maximum ammonia and total nitrogen removal of 100% and 91.68% were achieved, respectively. The relative abundances of the aerobic and the anaerobic ammonia-oxidizing bacteria were greater than 35% and 40% respectively, during the study. These strategies provided useful design tools for the efficient removal of nitrogen species in the presence of organic matter.

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Título de la Revista: Process Biochemistry
Fecha de publicación: 2017
Idioma: English