An operational protocol for facilitating start-up of single-stage autotrophic nitrogen-removing reactors based on process stoichiometry.
Start-up and operation of single-stage nitritation-anammox sequencing batch reactors (SBRs) for completely autotrophic nitrogen removal can be challenging and far from trivial. In this study, a step-wise procedure is developed based on stoichiometric analysis of the process performance from nitrogen species measurements to systematically guide start-up and normal operation efforts (instead of trial and error). The procedure is successfully applied to laboratory-scale SBRs for start-up and maintained operation over an 8-month period. This analysis can serve as a strong decision-making tool to take appropriate actions with respect to reactor operation to accelerate start-up or ensure high-rate N removal via the nitritation-anammox pathway.
Department of Environmental Engineering, Technical University of Denmark, Lyngby, Denmark. agzm@env.dtu.dk
A G
AG
Mutlu
A K
AK
Vangsgaard
G
G
Sin
B F
BF
Smets
D052818:Autotrophic Processes; D019149:Bioreactors; D008962:Models, Theoretical; D009584:Nitrogen / Q000737:chemistry / Q000302:isolation & purification*; D000644:Quaternary Ammonium Compounds / Q000032:analysis / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D009584:Nitrogen; D000644:Quaternary Ammonium Compounds; D062065:Wastewater