Outcompeting nitrite-oxidizing bacteria in single-stage nitrogen removal in sewage treatment plants: A model-based study

Pérez, Julio; Lotti, Tommaso; Kleerebezem, Robbert; Picioreanu, Cristian; Loosdrecht, M.C.M. van

doi:10.1016/j.watres.2014.08.028

Cited by 175 publications

(87 citation statements)

References 38 publications

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“…However, this strategy would not be suited for 494 single stage autotrophic nitrogen removal, as high residual ammonium concentrations in this 495 system are not desired, since the aim is the removal of nitrogen from the wastewater. Plug-496 flow hydrodynamics or SBR operation could be used instead in one-stage nitrogen removal 497 systems, to enhance the use of high residual ammonium concentrations as previouslyhighlighted in the literature (Pérez et al, 2014). For full scale applications, diurnal variability 499 of the wastewater, seasonality and rainy events might be also hampering the control of the 500 residual ammonium concentration in the partial nitritation reactor .…”

Section: Linking the Effects Of The Do/ammonium Concentrations Ratio mentioning

confidence: 99%

“…55 1 is used to describe the AOB growth rate, then the residual ammonium concentration affects 56 the ammonium saturation term (or Monod term) and therefore controls the growth rate of 57 AOB. Pérez et al (2014) reported a modelling study in which this concept is used for control 58 of NOB repression. However, until now the influence of the residual ammonium 59…”

Section: Introduction 27mentioning

confidence: 99%

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Effects of the residual ammonium concentration on NOB repression during partial nitritation with granular sludge

et al. 2016

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Citation (APA)Poot Important noteTo cite this publication, please use the final published version (if applicable). Please check the document version above. CopyrightOther than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policyPlease contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. This work is downloaded from Delft University of Technology. For technical reasons the number of authors shown on this cover page is limited to a maximum of 10.Effects of the residual ammonium concentration on NOB repression

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Section: Linking the Effects Of The Do/ammonium Concentrations Ratio mentioning

confidence: 99%

Section: Introduction 27mentioning

confidence: 99%

Effects of the residual ammonium concentration on NOB repression during partial nitritation with granular sludge

et al. 2016

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“…The obtained doubling time of hzo gene was 20.13 d, which was in the middle of 15-30 days of the typical anammox doubling time. 26 The quite low specic growth rates of amoA and hao compared to the 0.47 AE 0.13 d À1 of net growth rate of AOB in the conventional nitrication-denitrication process 27 could be attributed to the low oxygen supply in CPNA process for keeping the nitrite at low concentration.…”

Section: Response Of Functional Genesmentioning

confidence: 98%

Deciphering the evolution of the functional genes and microbial community of the combined partial nitritation-anammox process with nitrate build-up and its in situ restoration

Wang

Zhang

et al. 2016

RSC Adv.

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The operation of a combined partial nitritation-anammox (CPNA) process was hampered by the overgrowth of nitrite-oxidizing bacteria (NOB), which was then successfully in situ restored by the combination of hydroxylamine (NH 2 OH) dosing and sludge retention time (SRT) control. To elucidate the microbial evolution on gene level and the microbial mechanism responding to the NO 3 À build-up and in situ restoration in the CPNA process, the qPCR and high-throughput sequencing were used to investigate the evolution of the N-transformation genes and microbial community in this paper. Results showed that the concentrations of amoA and hao were both decreased as well as the hzo along with the NO 3 À build-up, however, the nitrite-oxidation encoding gene nxrA was increased. Pearson correlation analysis demonstrated that the gene nxrA was significantly correlated with the NO 3 À . After restoration, the abundances of amoA, hao and hzo were increased to 26.58%, 43.56% and 26.17%, respectively, while the growth of nxrA was effectively limited. The obtained high abundance of narG gene (37.85%) as well as the significant correlation of hzo-narG and hzo-nirS illustrated the in situ restoring mechanism, i.e., the intensive denitrification of the accumulated NO 3 À to NO followed by the stimulation of the anammox by NO. Additionally, MiSeq sequencing showed a new microbial community was rebuilt after restoration and the Haliscomenobacter and Nitrosomonas were the dominant genera. The abundance of anammox genus Candidatus Kuenenia was also increased to 8.0%. The significant correlation between nirK and Ignavibacterium indicated that the filaments played an important role in the denitrification of the accumulated NO 3 À .

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“…Several types of reactors, such as the sequential batch reactor [2], up-flow anaerobic sludge blanket (UASB) [14], and integrated fixed-film activated sludge [15], were applied to one-stage anammox, and several types of carriers were used to create the coexistence conditions, such as a granular sludge, sponge, immobilized carrier, and membrane [15][16][17][18]. Okabe et al (2008) reported that AOB grow on the outer part of the carrier and anammox bacteria grow in the inner part, while Li and Sung (2015) reported that both exhibit overlapping growth in the UASB reactor.…”

Section: Introductionmentioning

confidence: 99%

One-Stage Nitritation/Anammox Process Using a Biofilm Reactor with Two-Inflow

Zulkarnaini

Qin

Yamamoto-Ikemoto

et al. 2018

J. of Wat. & Envir. Tech.

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A new one-stage nitritation/anaerobic ammonium oxidation (anammox) process with two-inflow was proposed to provide suitable coexistence conditions for ammonium oxidation bacteria (AOB) and anammox bacteria. Reactor performances were examined using a two-inflow biofilm reactor fed with artificial ammonia-containing wastewater. For start-up, an anammox biofilm was cultivated in a wound filter set in the center of the reactor until the anammox process occurred stoichiometrically. Then, sponge media containing abundant AOB were added to the reactor, and aeration of the reactor began, also nitrite concentrations in the substrate decreased and the ammonium concentration increased gradually. Both anammox and nitritation occurred in the reactor. The maximum nitrogen removal efficiency achieved was 49%, the maximum ammonium conversion efficiency was 60%, and the maximum nitrogen removal rate was 0.228 kg-N/(m 3 ·d) at the nitrogen loading rate of 0.5 kg-N/ (m 3 ·d). It was estimated that ammonium oxidation (nitritation) occurred in the sponge; hence, the anammox reaction occurred in the biofilm attached to the filter.

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Outcompeting nitrite-oxidizing bacteria in single-stage nitrogen removal in sewage treatment plants: A model-based study

Cited by 175 publications

References 38 publications

Effects of the residual ammonium concentration on NOB repression during partial nitritation with granular sludge

Effects of the residual ammonium concentration on NOB repression during partial nitritation with granular sludge

Deciphering the evolution of the functional genes and microbial community of the combined partial nitritation-anammox process with nitrate build-up and its in situ restoration

One-Stage Nitritation/Anammox Process Using a Biofilm Reactor with Two-Inflow

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