Model of simultaneous denitrification and methanogenesis in an Upflow Packed‐Bed Biofilm Reactor: Nitrogen compounds' inhibition and pseudo two‐dimensional biofilm model

Abstract

BACKGROUND: The modelling of simultaneous denitrification and methanogenesis (DM) in upflow packed-bed biofilm reactors (UPBR) and the effect of inhibition by nitrogen compounds on methanogenesis has received little attention. This study evaluated the effect using a model that incorporates a pseudo-two-dimensional biofilm model.

Mathematical modeling of simultaneous carbon-nitrogen-sulfur removal from industrial wastewater

“…Thus homoacetogens utilized COD as a substrate to produce only acetate but no hydrogen gas (Process 6) and methane production was almost completely via Process 5. The inhibitory effect of nitrate on methanogenesis was initially included in 9 the model, but impacted little on the result for the scenarios tested which was in accordance with previous findings [42,43] and was therefore omitted to reduce the complexity of the model. The aerobic COD oxidation process performed by FB was considered based on the biochemical reactions R8 and R9 below.…”

Operation and dynamic modeling of a novel integrated anaerobic–aerobic–anoxic reactor for sewage treatment

“…Calibration consisted to adjust two parameters which were determined as the ones that most affect COD removal and nitrite accumulation according to the methodology of Huiliñir et al (2009): q max and kl, using the experimental data from the continuous ICR operation. The adjustment was performed via a minimization of the least square error function (S) presented in Eq.…”

Modeling of the denitrification/anaerobic digestion process of salmon fishery wastewater in a biofilm tubular reactor

“…1, ADM1 (Batstone et al, 2002) and incorporated the reduction of nitrogen compounds, predicting the process behavior of batch, semicontinuous and continuous flow systems with suspended biomass. The only reports in the literature of denitrificationeAD process modeling in biofilm tubular reactors are Chaudhry and Beg (1997) and Huiliñir et al (2009), who used methanol as organic matter source, a compound that is not characteristic in residues with a high protein load.…”

“…The model of simultaneous denitrification/AD process based on the model of Angelidaki et al (1999) has not been presented yet, and is one of the contributions of the present study. Additionally, this paper extends the model that uses methanol as a substrate (Chaudhry and Beg, 1997;Huiliñir et al, 2009) using a complex substrate. The model developed in this work applies to any effluent with protein as a main organic matter compound, as it considers simultaneously all biological kinetics and stoichiometries of the process.…”

“…The objective of the present study was to obtain a steady-state model of the denitrification/anaerobic digestion process of salmon fishery wastewater in a biofilm tubular reactor working at mesophilic temperature, based on the biofilm tubular reactor model presented by Huiliñir et al (2009). Thus, the AD model of Angelidaki et al (1999) was modified incorporating the reduction of NO 3 À to N 2 , the variation in pH and the biomass effect on hydrolysis.…”