Ammonia-Oxidizing Archaea (AOA) Play with Ammonia-Oxidizing Bacteria (AOB) in Nitrogen Removal from Wastewater

Yin, Zhixuan; Bi, Xuejun; Xu, Chenlu

doi:10.1155/2018/8429145

Cited by 65 publications

(56 citation statements)

References 65 publications

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“…AO will generate N 2 O in aerobic processes, but their contributions will be influenced by spatial heterogeneity, with anoxic conditions within flocs of activated sludge processes and biofilms formed in trickling filters. AOB are generally considered to dominate AO communities, but Yin, Bi, and Xu (2018) found that AOB dominated 13 of 23 wastewater treatment plants, including 3 in which AOA were not detectable. AOB are generally considered to dominate AO communities, but Yin, Bi, and Xu (2018) found that AOB dominated 13 of 23 wastewater treatment plants, including 3 in which AOA were not detectable.…”

Section: Wastewater Treatment Systemsmentioning

confidence: 99%

Nitrous oxide production by ammonia oxidizers: Physiological diversity, niche differentiation and potential mitigation strategies

Prosser

Hink

Gubry‐Rangin

et al. 2019

Global Change Biology

284

157

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Oxidation of ammonia to nitrite by bacteria and archaea is responsible for global emissions of nitrous oxide directly and indirectly through provision of nitrite and, after further oxidation, nitrate to denitrifiers. Their contributions to increasing N 2 O emissions are greatest in terrestrial environments, due to the dramatic and continuing increases in use of ammonia-based fertilizers, which have been driven by requirement for increased food production, but which also provide a source of energy for ammonia oxidizers (AO), leading to an imbalance in the terrestrial nitrogen cycle.Direct N 2 O production by AO results from several metabolic processes, sometimes combined with abiotic reactions. Physiological characteristics, including mechanisms for N 2 O production, vary within and between ammonia-oxidizing archaea (AOA) and bacteria (AOB) and comammox bacteria and N 2 O yield of AOB is higher than in the other two groups. There is also strong evidence for niche differentiation between AOA and AOB with respect to environmental conditions in natural and engineered environments. In particular, AOA are favored by low soil pH and AOA and AOB are, respectively, favored by low rates of ammonium supply, equivalent to application of slow-release fertilizer, or high rates of supply, equivalent to addition of high concentrations of inorganic ammonium or urea. These differences between AOA and AOB provide the potential for better fertilization strategies that could both increase fertilizer use efficiency and reduce N 2 O emissions from agricultural soils. This article reviews research on the biochemistry, physiology and ecology of AO and discusses the consequences for AO communities subjected to different agricultural practices and the ways in which this knowledge, coupled with improved methods for characterizing communities, might lead to improved fertilizer use efficiency and mitigation of N 2 O emissions.

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Section: Wastewater Treatment Systemsmentioning

confidence: 99%

Nitrous oxide production by ammonia oxidizers: Physiological diversity, niche differentiation and potential mitigation strategies

Prosser

Hink

Gubry‐Rangin

et al. 2019

Global Change Biology

284

157

View full text Add to dashboard Cite

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“…Two species of Archaea, Haloferax denitrificans a nd Pyrobaculum aerophilum have been reported to produce N 2 gas as the final end product indicating the complete mechanism of denitrification (De Vries and Schroder ). In recent years, Archaea have been successfully cultivated and enriched, but still, there is not much information on the enrichment of Archaea in actual wastewater nitrogen‐removal systems (Yin et al ). However, the role of bacteria in denitrification has been more extensively studied.…”

Section: Biological Routes Of Nitrate Removalmentioning

confidence: 99%

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

et al. 2020

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With the increase in industrial and agricultural activities, a large amount of nitrogenous compounds are released into the environment, leading to nitrate pollution. The perilous effects of nitrate present in the environment pose a major threat to human and animal health. Bioremediation provides a costeffective and environmental friendly method to deal with this problem. The process of aerobic denitrification can reduce nitrate compounds to harmless dinitrogen gas. This review provides a brief view of the exhaustive role played by aerobic denitrifiers for tackling nitrate pollution under different ecological niches and their dependency on various environmental parameters. It also provides an understanding of the enzymes involved in aerobic denitrification. The role of aerobic denitrification to solve the issues faced by the conventional method (aerobic nitrification-anaerobic denitrification) in treating nitrogenpolluted wastewaters is elaborated. verts the iron centre of haemoglobin from Fe 2+ to Fe 3+ Role of heterotrophic aerobic denitrifying bacteriaA. Rajta et al.

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“…A cell morphology consisting of membrane‐bound compartments may be better at protecting the cell from toxic compounds compared to a typical prokaryote cell, where key enzymes often are accessible in the periplasm. It is well‐established that nitrifying microorganisms (AOB and ammonia oxidizing archaea, AOA) have their key ammonia oxidizing enzyme, AMO, in the periplasm . The periplasmic location of the Cu‐containing AMO may account for the heightened sensitivity of AOB to azoles.…”

Section: Discussionmentioning

confidence: 99%

“…It is well-established that nitrifying microorganisms (AOB and ammonia oxidizing archaea, AOA) have their key ammonia oxidizing enzyme, AMO, in the periplasm. 34 The periplasmic location of the Cu-containing AMO may account for the heightened sensitivity of AOB to azoles. However, the relatively low toxicity of the azole compounds to anammox also may be related to the unique cell membrane structure/composition of the anammox bacteria.…”

Section: Discussionmentioning

confidence: 99%

Toxicity of azoles towards the anaerobic ammonium oxidation (anammox) process

Lakhey

Sierra-Álvarez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Azoles are an important class of compounds that are widely used as corrosion inhibitors in aircraft de‐icing agents, cooling towers, semiconductor manufacturing and household dishwashing detergents. They also are important moieties in pharmaceutical drugs and fungicides. Azoles are widespread emerging contaminants occurring frequently in water bodies. Azole compounds can potentially cause inhibition towards key biological processes in natural ecosystems and wastewater treatment processes. Of particular concern is the inhibition of azoles to the nitrification process (aerobic oxidation of ammonium). This study investigated the acute toxicity of azole compounds towards the anaerobic ammonia oxidation (anammox) process, which is an important environmental biotechnology gaining traction for nutrient‐nitrogen removal during wastewater treatment. In this study, using batch bioassay techniques, the anammox toxicity of eight commonly occurring azole compounds was evaluated. RESULTS The results show that 1H‐benzotriazole and 5‐methyl‐1H‐benzotriazole had the highest inhibitory effect on the anammox process, causing 50% decrease in anammox activity (IC50) at concentrations of 19.6 and 17.8 mg L−1, respectively. 1H‐imidazole caused less severe toxicity with an IC50 of 79.4 mg L−1. The other azole compounds were either nontoxic (1H‐pyrazole, 1H‐1,2,4‐triazole and 1‐methyl‐pyrazole) or at best mildly toxic (1H‐benzotriazole‐5‐carboxylic acid and 3,5‐dimethyl‐1H‐pyrazole) towards the anammox bacteria at the concentrations tested. CONCLUSIONS This study showed that most azole compounds tested displayed mild to low or no toxicity towards the anammox bacteria. The anammox bacteria were found to be far less sensitive to azoles compared to nitrifying bacteria. © 2019 Society of Chemical Industry

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Ammonia-Oxidizing Archaea (AOA) Play with Ammonia-Oxidizing Bacteria (AOB) in Nitrogen Removal from Wastewater

Cited by 65 publications

References 65 publications

Nitrous oxide production by ammonia oxidizers: Physiological diversity, niche differentiation and potential mitigation strategies

Nitrous oxide production by ammonia oxidizers: Physiological diversity, niche differentiation and potential mitigation strategies

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

Toxicity of azoles towards the anaerobic ammonium oxidation (anammox) process

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