RT journal article
T1 Effect of two different intermediate landfill leachates on the ammonium oxidation  rate of non-adapted and adapted nitrifying biomass.i
A1 González Cortés, José Joaquín
A1 Almengló Cordero, Fernando
A1 Ramírez Muñoz, Martín
A1 Cantero Moreno, Domingo
A2 Ingeniería Química y Tecnología de Alimentos
K1 Nitrification
K1 Landfill leachate
K1 Kinetic parameters
K1 Inhibition
K1 Heavy metals
K1 Adapted biomass
AB A widely employed approach to minimize the detrimental effect of landfill leachates (LL) on nitrifying biomass is to adapt it to these contaminated effluents prior to use. In the study reported here the impact of different intermediate landfill leachates (intermediate 1 (ILL1) and intermediate 2 (ILL2)) and synthetic medium (SM) on the nitritation rates of non-adapted and adapted nitrifying biomass were evaluated and modeled. The models, based on previously reported models (Haldane, Edwards and Aiba), considered the effect of three different heavy metals (Cu, Ni and Zn) present in both landfill leachates. The proposed models fitted well with the different biomasses. The highest specific substrate oxidation rate (qS) of the present study (41.85 ± 1.09 mg N–NH4+ g TSS−1 h−1) was obtained by the non-adapted biomass using SM. The non-adapted biomass was characterized by ~5- and ~28-fold higher nitritation rates on using the different ammonium sources tested (SM, ILL1 and ILL2) when compared to the other biomasses adapted to ILL1 (~9 mg N–NH4+ g TSS−1 h−1) and ILL2 (~1.3 mg N–NH4+ g TSS−1 h−1), respectively. The calculated inhibition constants indicate that the inhibitory effect of the heavy metals followed the order Ni>Zn>Cu. The results reported here bring into question the commonly accepted idea that an adaptation period of the biomass is required to treat landfill leachate.
PB Elsevier
SN 0301-4797
YR 2020
FD 2020-12-23
LK http://hdl.handle.net/10498/33721
UL http://hdl.handle.net/10498/33721
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026