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Partial nitritation/anammox applied to real anaerobically pretreated domestic sewage under subtropical climate: aeration strategies and nitrogen cycle bacteria.

Authors :
Gonçalves Piteira Carvalho, Brenda
Abreu Henriques, Daniel
Fernandes, Luyara Almeida
Leal, Cintia Dutra
Calábria de Araújo, Juliana
Source :
Environmental Technology; Nov2024, Vol. 45 Issue 26, p5589-5599, 11p
Publication Year :
2024

Abstract

The combination of sewage anaerobic treatment and partial nitritation/anammox process (PN/A) can make wastewater treatment plants energetically self-sufficient. However, PN/A application has been a challenge in low-nitrogen wastewaters and it is little explored in anaerobically pretreated domestic sewage, as well as aeration strategies and the PN/A feasibility at ambient temperature. This study investigated PN/A in a sequential batch reactor (SBR) treating real anaerobically pretreated domestic sewage. After the startup, SBR was fed with real wastewater and operated at 35°C and at ambient temperature (20–31°C) without total nitrogen (TN) removal decrease (71 ± 8 and 75 ± 6%, respectively). The median ammonium and TN removals were 68 ± 21 and 59 ± 9%, respectively with 7 min on/14 min off strategy, which represents 12.3 ± 4.2 mg L<superscript>−1</superscript> N-NH<subscript>4</subscript><superscript>+</superscript> effluent, which is lower than Brazilian discharge limits. The qPCR results showed anammox abundance in the range of 10<superscript>8</superscript>–10<superscript>9</superscript> n° copies gVSS<superscript>−1</superscript>. Thus, results were very promising and showed the feasibility of the PN/A process for treating real anaerobically pretreated domestic sewage at ambient temperature. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09593330
Volume :
45
Issue :
26
Database :
Complementary Index
Journal :
Environmental Technology
Publication Type :
Academic Journal
Accession number :
180967693
Full Text :
https://doi.org/10.1080/09593330.2023.2298666