RT Journal Article
T1 Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR
A1 Belmonte, Marisol
A1 Hsieh, Chia-Fang
A1 Campos Gómez, José Luis
A1 Guerrero, Lorna
A1 Méndez Pampín, Ramón José
A1 Mosquera Corral, Anuska
A1 Vidal, Gladys
K1 Free Ammonia
K1 Free Nitrous Acid
K1 Alkalinity
K1 Partial Nitrification
K1 Pretreated Pig Slurry
K1 SBR
AB The effect of free ammonia (NH3 or FA), free nitrous acid (HNO2 or FNA), and total alkalinity (TA) on the performance of a partial nitrification (PN) sequencing batch reactor (SBR) treating anaerobically pretreated pig slurry was studied. The SBR was operated under alternating oxic/anoxic (O/A) conditions and was fed during anoxic phases.This strategy allowed using organic matter to partially remove nitrite (NO2−) and nitrate (NO3−) generated during oxic phases.The desired NH4+ to NO2− ratio of 1.3 g N/g N was obtained when an Ammonium Loading Rate (ALR) of 0.09 g NH4+-N/L⋅d was applied. The system was operated at a solid retention time (SRT) of 15–20 d and dissolved oxygen (DO) levels higher than 3 mg O2/L during the whole operational period. PN mainly occurred caused by the inhibitory effect of FNA on nitrite oxidizing bacteria (NOB). Once HNO2 concentration was negligible,NH4+ was fully oxidized to NO3− in spite of the presence of FA. The use of biomass acclimated to ammonium as inoculum avoided a possible effect of FA on NOB activity.
PB Hindawi
SN 2314-6133
YR 2017
FD 2017
LK http://hdl.handle.net/10347/22647
UL http://hdl.handle.net/10347/22647
LA eng
NO Belmonte, M., Hsieh, C. F., Campos, J. L., Guerrero, L., Méndez, R., Mosquera-Corral, A., and Vidal, G. (2017). Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR. BioMed research international, 2017. https://dx.doi.org/10.1155/2017/6571671
NO This work was funded by the Chilean Government (CONICYT/FONDECYT 3140276, CONICYT/PAI/MEC 80140011, FDD-UPLA-CC18105, Patagonia Seed Project 210.310.055-1SP, CONICYT/FONDAP/15130015, and Red Doctoral REDOC.CTA, MINEDUC Grant UCO1202 at University of Concepción)
DS Minerva
RD 30 abr 2026