Towards mainstream anammox

lessons learned from pilot-scale research at WWTP Dokhaven

Journal article (2018)

Authors

M. Hoekstra BT/Environmental Biotechnology - AS
Stefan P. Geilvoet Waterschap Hollandse Delta
Tim L.G. Hendrickx Paques B.V.
Charlotte S. van Erp Taalman Kip Waterschap Hollandse Delta
R. Kleerebezem BT/Environmental Biotechnology - AS
Mark C.M. van Loosdrecht BT/Environmental Biotechnology - AS
Research Group
BT/Environmental Biotechnology (AS) (TU Delft)
Copyright: © 2018 M. Hoekstra, Stefan P. Geilvoet, Tim L.G. Hendrickx, Charlotte S. van Erp Taalman Kip, R. Kleerebezem, Mark C.M. van Loosdrecht
DOI
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https://doi.org/10.1080/09593330.2018.1470204
Low temperature Wastewater treatment Mainstream anammox Autotrophic nitrogen removal
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Published Date

2018

Language

English

Faculty

Applied Sciences

Department

BT/Biotechnologie

Research Group

BT/Environmental Biotechnology

Abstract

The aim of this research was to study the biological feasibility of the Partial Nitritation/Anammox (PN/A) technology to remove nitrogen from municipal mainstream wastewaters. During stable process operations at summer temperatures (23.2 ± 1.3°C), the total nitrogen removal rate was 0.223 ± 0.029 kg N (m3 d)−1 while at winter temperatures (13.4 ± 1.1°C) the total nitrogen removal rate was 0.097 ± 0.016 kg N (m3 d)−1. Nitrite-oxidizing bacteria (NOB) suppression was successfully achieved at the complete temperature range of municipal mainstream wastewater. Despite the presence of NOB as observed in activity tests, their activity could be successfully suppressed due to a relative low dissolved oxygen concentration. An overcapacity of ammonia-oxidizing bacteria and anammox activity was always present. Long-term stability is a focus point for future research, especially in relation to the stability of the biological oxygen demand removing step, preceding the PN/A reactor.