fulltext.study @t Gmail

Effect of the kinetics of ammonium and nitrite oxidation on nitritation success or failure for different biofilm reactor geometries

Paper ID Volume ID Publish Year Pages File Format Full-Text
3546 174 2012 7 PDF Available
Title
Effect of the kinetics of ammonium and nitrite oxidation on nitritation success or failure for different biofilm reactor geometries
Abstract

The effect of biokinetics on nitritation was investigated in two biofilm geometries, the Membrane Aerated Biofilm Reactor (MABR) and a conventional biofilm system. A 1D biofilm model was used and evaluated by global sensitivity analysis using the variance based Sobol method. The main focus was on the influence of key biokinetic parameters (maximum specific growth rates, oxygen and nitrogen affinity constants of AOB (ammonium oxidizing bacteria) and NOB (nitrite oxidizing bacteria)) and their ratios on nitritation efficiency in these geometries. This exhaustive simulation study revealed that nitritation strongly depends on the chosen kinetic parameters of AOB and NOB. The maximum specific growth rates (μmax,AOB and μmax,NOB) had the strongest impact on nitritation efficiency (NE). In comparison, the counter-diffusion geometry yielded more parameter combinations (27.5%) that resulted in high NE than the co-diffusion geometry (7.9%). The oxygen concentrations at the relevant biofilm interfaces (membrane/biofilm for counter-diffusion or bulk/biofilm for co-diffusion) were not predictive of NE. However, the maximum allowable oxygen concentration to maintain higher NE was higher for the counter-diffusion geometry.

► Modeling comparison of co- and counter-diffusion biofilms for nitritation efficiency (NE). ► Higher NE in counter-diffusion biofilm (27.5% vs. 7.9% in co-diffusion biofilm). ► Oxygen affinity constants determine NE to a higher extent in the co-diffusion biofilms. ► Maximum permissible oxygen concentration at the interfaces higher in counter-diffusion biofilms.

Keywords
Nitritation; Biofilm modeling; Biofilm geometry; MABR; Oxygen affinity; Specific growth rate
First Page Preview
Effect of the kinetics of ammonium and nitrite oxidation on nitritation success or failure for different biofilm reactor geometries
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 69, 15 December 2012, Pages 123–129
Authors
, ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us