Biological nitrogen removal through nitritation coupled with thiosulfate-driven denitritation

Qian, Jin, Zhou, Junmei, Zhang, Zhen, Liu, Rulong and Wang, Qilin (2016) Biological nitrogen removal through nitritation coupled with thiosulfate-driven denitritation. Scientific Reports, 6 27502: 1-10. doi:10.1038/srep27502

Author Qian, Jin
Zhou, Junmei
Zhang, Zhen
Liu, Rulong
Wang, Qilin
Title Biological nitrogen removal through nitritation coupled with thiosulfate-driven denitritation
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2016-06-08
Year available 2016
Sub-type Article (original research)
DOI 10.1038/srep27502
Open Access Status DOI
Volume 6
Issue 27502
Start page 1
End page 10
Total pages 10
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2017
Language eng
Formatted abstract
A novel biological nitrogen removal system based on nitritation coupled with thiosulfate-driven denitritation (Nitritation-TDD) was developed to achieve a high nitrogen removal rate and low sludge production. A nitritation sequential batch reactor (nitritation SBR) and an anoxic up-flow sludge bed (AnUSB) reactor were applied for effective nitritation and denitritation, respectively. Above 75% nitrite was accumulated in the nitritation SBR with an influent ammonia loading rate of 0.43 kg N/d/m3. During Nitritation-TDD operation, particle sizes (d50) of the sludge decreased from 406 to 225 um in nitritation SBR and from 327–183 um in AnUSB reactor. Pyrosequencing tests revealed that ammonium-oxidizing bacteria (AOB) population was stabilized at approximately 7.0% (calculated as population of AOB-related genus divided by the total microbial population) in the nitritation SBR. In contrast, nitrite-oxidizing bacteria (NOB) population decreased from 6.5–0.6% over the same time, indicating the effective nitrite accumulation in the nitritation SBR. Thiobacillus, accounting for 34.2% in the AnUSB reactor, was mainly responsible for nitrogen removal via autotrophic denitritation, using an external source of thiosulfate as electron donor. Also, it was found that free nitrous acid could directly affect the denitritation activity.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
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Created: Mon, 27 Jun 2016, 10:21:39 EST by Qilin Wang on behalf of Advanced Water Management Centre