Towards mainstream anammox

Towards mainstream anammox: lessons learned from pilot-scale research at WWTP Dokhaven

Hoekstra, M. (TU Delft BT/Environmental Biotechnology)
Geilvoet, Stefan P. (Waterschap Hollandse Delta)
Hendrickx, Tim L.G. (Paques B.V.)
van Erp Taalman Kip, Charlotte S. (Waterschap Hollandse Delta)
Kleerebezem, R. (TU Delft BT/Environmental Biotechnology)
van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology)

2018

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 (m³d)⁻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.

autotrophic nitrogen removal
low temperature
Mainstream anammox
wastewater treatment

http://resolver.tudelft.nl/uuid:f7f796e1-9503-48d9-8c16-a68164bb610f

https://doi.org/10.1080/09593330.2018.1470204

0959-3330

Environmental Technology, 1-13

Institutional Repository

journal article

© 2018 M. Hoekstra, Stefan P. Geilvoet, Tim L.G. Hendrickx, Charlotte S. van Erp Taalman Kip, R. Kleerebezem, Mark C.M. van Loosdrecht