Effect of external hydrazine addition on anammox reactor start-up time

Ganesan, Sivarajah; Vadivelu, Vel Murugan

doi:10.1016/j.chemosphere.2019.02.104

Cited by 35 publications

(9 citation statements)

References 32 publications

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“…27 These additional energy sources can be continuously used by anammox cells that contribute to the maintenance of bacterial activity and enable more of them to survive. 28 Furthermore, the conversion rates of NH 4 + and NO 2 − were 1.12 mgN gvss −1 h −1 and 1.32 mgN gvss −1 h −1 in the control group, which were higher than the other experimental groups. When the sulfate concentration was 60 mg L −1 , the conversion rates of NH 4 + and NO 2 − were 0.98 mgN gvss −1 h −1 and 1.15 mgN gvss −1 h −1 , which were the best among the sulfate group.…”

Section: Recovery Of Anammox After Inhibitionmentioning

confidence: 76%

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Recovery of anaerobic ammonium oxidation via hydrazine following sulfate inhibition

Chen¹,

zhou²,

Wang³

et al. 2022

Environ. Sci.: Water Res. Technol.

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Section: Recovery Of Anammox After Inhibitionmentioning

confidence: 76%

“…27 These additional energy sources can be continuously used by anammox cells that contribute to the maintenance of bacterial activity and enable more of them to survive. 28…”

Section: Resultsmentioning

confidence: 99%

Recovery of anaerobic ammonium oxidation via hydrazine following sulfate inhibition

Chen¹,

zhou²,

Wang³

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…Thus, this metabolite is used as an energy source once four electrons are released for ATP synthesis. Here, another metabolic exception of AnAOB can be evidenced: N 2 H 4 , which is highly toxic and induces inhibition in metabolic pathways of most of the microbes involved in biological treatment processes, is not toxic for these bacteria (Ganesan & Vadivelu, 2019; Kartal et al, 2011; Qiao et al, 2016).…”

Section: Anammox Processmentioning

confidence: 99%

Key enzymes involved in anammox‐based processes for wastewater treatment: An applied overview

Venturin

Rodrigues

Bonassa

et al. 2022

Water Environment Research

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“…Antibiotics can affect microbial activities in wastewater treatment (Zhang et al 2019b), which has been shown previously (Lu et al 2021;Madeira and de Araújo 2021), albeit all studies have been performed with sludge granules that intrinsically protect the enclosed bacteria. In contrast to inhibitors, many effectors such as graphene, ferrous iron, or manganese can enhance anammox activity (Bi et al 2014;Ganesan and Vadivelu 2019;Wang et al 2013;Wu et al 2020;Yin et al 2016), but their link with the inherent abilities (genes and proteins) of anammox bacteria are lacking in the literature. It is important to know the molecular mechanisms through which these effectors influence gene expression to rationally design optimized conditions for anammox bacteria growth in real applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of reducing, stabilizing, and antibiotic agents on “Candidatus Kuenenia stuttgartiensis”

Ude

Haas

Kaiyoum

et al. 2023

Appl Microbiol Biotechnol

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Anaerobic ammon ium oxidizing (anammox) bacteria oxidize ammonium and reduce nitrite, producing N2, and could play a major role in energy-optimized wastewater treatment. However, sensitivity to various environmental conditions and slow growth currently hinder their wide application. Here, we attempted to determine online the effect of environmental stresses on anammox bacteria by using an overnight batch activity test with whole cells, in which anammox activity was calculated by quantifying N2 production via headspace-pressure monitoring. A planktonic mixed culture dominated by “Candidatus Kuenenia stuttgartiensis” strain CSTR1 was cultivated in a 30-L semi-continuous stirring tank reactor. In overnight resting-cell anammox activity tests, oxygen caused strong inhibition of anammox activity, which was reversed by sodium sulfite (30 µM). The tested antibiotics sulfamethoxazole, kanamycin, and ciprofloxacin elicited their effect on a dose-dependent manner; however, strain CSTR1 was highly resistant to sulfamethoxazole. Anammox activity was improved by activated carbon and Fe2O3. Protein expression analysis from resting cells after anammox activity stimulation revealed that NapC/NirT family cytochrome c (KsCSTR_12840), hydrazine synthase, hydrazine dehydrogenase, hydroxylamine oxidase, and nitrate:nitrite oxidoreductase were upregulated, while a putative hydroxylamine oxidoreductase HAO (KsCSTR_49490) was downregulated. These findings contribute to the growing knowledge on anammox bacteria physiology, eventually leading to the control of anammox bacteria growth and activity in real-world application. Key Points • Sulfite additions can reverse oxygen inhibition of the anammox process • Anammox activity was improved by activated carbon and ferric oxide • Sulfamethoxazole marginally affected anammox activity Graphical abstract

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Effect of external hydrazine addition on anammox reactor start-up time

Cited by 35 publications

References 32 publications

Recovery of anaerobic ammonium oxidation via hydrazine following sulfate inhibition

Recovery of anaerobic ammonium oxidation via hydrazine following sulfate inhibition

Key enzymes involved in anammox‐based processes for wastewater treatment: An applied overview

Effects of reducing, stabilizing, and antibiotic agents on “Candidatus Kuenenia stuttgartiensis”

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