Towards mainstream anammox: lessons learned from pilot-scale research at WWTP Dokhaven. Issue 13 (7th June 2019)

• Record Type: Journal Article
• Authors: Hoekstra, Maaike; Geilvoet, Stefan P.; Hendrickx, Tim L. G.; van Erp Taalman Kip, Charlotte S.; Kleerebezem, Robbert; van Loosdrecht, Mark C. M.
• Is Part Of: Environmental technology. Volume 40:Issue 13(2019)
• Page Start: 1721
• Page End: 1733
• Publication Date: 2019-06-07
• Subjects: Mainstream anammox -- wastewater treatment -- autotrophic nitrogen removal -- low temperature; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2018.1470204
• Languages: English
• ISSNs: 0959-3330

Abstract

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 (m 3 d) −1 while at winter temperatures (13.4 ± 1.1°C) the total nitrogen removal rate was 0.097 ± 0.016 kg N (m 3 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. GRAPHICAL ABSTRACT: