Would a two-stage N-removal be a suitable technology to implement at full scale the use of anammox for sewage treatment?

Journal article (2015)

Authors

Julio Pérez BT/Environmental Biotechnology - AS
E Isanta Universitat Autònoma de Barcelona
J Carrera Universitat Autònoma de Barcelona
Research Group
BT/Environmental Biotechnology (AS) (TU Delft)
Mainstream Partial nitritation Diurnal variability Dosing sidestream Nitrite-oxidizing bacteria (NOB) repression Reject water
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Published Date

2015

Language

English

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Faculty

Applied Sciences

Department

BT/Biotechnologie

Research Group

BT/Environmental Biotechnology

Abstract

Sewage treatment with anammox could be implemented through a two-step reactor system, where the first reactor would be devoted to partial nitritation. A process design was sketched including control loops. The control strategy regulates the flow-rate of the rich ammonium sidestream produced after dewatering the digested sludge, to keep the ammonium concentration at a set point in the partial nitritation reactor by DOsing the SIde Stream (DOSIS). A second control loop manages the ammonium concentration set point based on the measurement of the total nitrogen in the partial nitritation reactor. A mathematical model was developed to assess the amount of sidestream required. Even in the case of a strong diurnal variability, simulations show how the control strategy is correctly performing, demonstrating the potential of the proposed technology.