Molecular microbial ecology of nitrification in an activated sludge process treating refinery wastewater

Ballinger, S. J.; Head, Ian M.; Curtis, Tom; Godley, A.

doi:10.1016/s0273-1223(98)00091-2

Cited by 14 publications

(2 citation statements)

References 9 publications

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“…As demonstrated by molecular approaches members of the N. oligotropha-lineage, are widely distributed in diverse aquatic environments 2,37 . These also include engineered habitats, such as wastewater treatment systems, which however are characterized by lowammonia influents [38][39][40][41] , biofilm reactors 42 or drinking water distribution systems 43 . A further characteristic feature is their capability of self-flocculation, which is usually interpreted as adaptation to the conditions of river habitats 44 .…”

Section: Discussionmentioning

confidence: 99%

Deep amoA amplicon sequencing reveals community partitioning within ammonia-oxidizing bacteria in the environmentally dynamic estuary of the River Elbe

Malinowski

Alawi

Krohn

et al. 2020

Sci Rep

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The community composition of betaproteobacterial ammonia-oxidizing bacteria (ß-AOB) in the River Elbe Estuary was investigated by high throughput sequencing of ammonia monooxygenase subunit A gene (amoA) amplicons. In the course of the seasons surface sediment samples from seven sites along the longitudinal profile of the upper Estuary of the Elbe were investigated. We observed striking shifts of the ß-AOB community composition according to space and time. Members of the Nitrosomonas oligotropha-lineage and the genus Nitrosospira were found to be the dominant ß-AOB within the river transect, investigated. However, continuous shifts of balance between members of both lineages along the longitudinal profile were determined. A noticeable feature was a substantial increase of proportion of Nitrosospira-like sequences in autumn and of sequences affiliated with the Nitrosomonas marina-lineage at downstream sites in spring and summer. Slightly raised relative abundances of sequences affiliated with the Nitrosomonas europaea/Nitrosomonas mobilis-lineage and the Nitrosomonas communis-lineage were found at sampling sites located in the port of Hamburg. Comparisons between environmental parameters and AOB-lineage (ecotype) composition revealed promising clues that processes happening in the fluvial to marine transition zone of the Elbe estuary are reflected by shifts in the relative proportion of ammonia monooxygenase sequence abundance, and hence, we propose ß-AOB as appropriate indicators for environmental dynamics and the ecological condition of the Elbe Estuary.

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Section: Discussionmentioning

confidence: 99%

Deep amoA amplicon sequencing reveals community partitioning within ammonia-oxidizing bacteria in the environmentally dynamic estuary of the River Elbe

Malinowski

Alawi

Krohn

et al. 2020

Sci Rep

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“…Ammonia-rich ecosystems generally demonstrate the habitual predominance of Nitrosomonas sp. [6,51]. The bacterial amoA gene sequences showed 99% identity to uncultured AOB.…”

Section: Functional Gene Analyses Of Ammonia Oxidizers In Zwe Pondmentioning

confidence: 98%

Molecular characterization of bacteria and archaea in a bioaugmented zero-water exchange shrimp pond

et al. 2021

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In the zero-water exchange shrimp culture pond maintained with the application of indigenous bioaugmentor, low levels of total ammonia–nitrogen were reported, indicating the relevance of indigenous microbial communities. Sediments (0–5 cm layer) were sampled from the pond (85th day) and the bacterial and archaeal communities; specifically, the ammonia oxidizers (ammonia-oxidizing bacteria, ammonia-oxidizing archaea, and anaerobic ammonia-oxidizing bacteria) in the sediment metagenome of the pond were analysed using the 16S rRNA and functional genes. Bacterial and archaeal 16S rRNA genes showed the relative abundance of Delta-Proteobacteria and Bacteroidetes groups performing sulphur respiration and organic matter degradation, archaeal groups of anaerobic sulphur respiring Crenarchaeotae, and chemolithoautotrophic ammonia oxidizers belonging to Thaumarchaeota. The presence of these diverse bacterial and archaeal communities denotes their significant roles in the cycling the carbon, nitrogen, and sulphur thereby bringing out efficient bioremediation in the bioaugmented zero-water exchange shrimp culture pond. Similarly, the functional gene-specific study showed the predominance of Nitrosomonas sp. (ammonia-oxidizing bacteria), Nitrosopumilus maritimus (ammonia-oxidizing archaea), and Candidatus Kuenenia (anaerobic ammonia-oxidizing bacteria) in the system, which points to their importance in the removal of accumulated ammonia. Thus, this study paves the way for understanding the microbial communities, specifically the ammonia oxidizers responsible for maintaining healthy and optimal environmental conditions in the bioaugmented zero-water exchange shrimp culture pond.

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Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Liu

Jia

Quan

2017

J of Chemical Tech & Biotech

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BACKGROUND The integrated free‐floating biofilm and activated sludge (IFFAS) process is an ideal candidate for simultaneous nitrification and denitrification (SND). However, traditional carriers have their inherent drawbacks, such as the weak hydrophilicity and negative charges on the surface. In this study, novel carriers with favorable hydrophilicity and electrophilicity were prepared and implemented in an IFFAS‐based SND reactor. RESULTS Compared with traditional carriers, the water contact angle of the novel carriers dropped to 60.2° and positive charges on the surface (+11.7 mV, pH 7.0) were acquired. Through accurate control of dissolved oxygen (DO), it took only 30 days to start SND, with a total nitrogen (TN) removal efficiency of 80.2%. In contrast, the start‐up period was 42 days with weaker TN removal capacity in a control reactor filled with traditional carriers. Novel carriers provided a favorable niche for more types of bacteria to survive, of which Nitrosomonadales and Nitrospirale were identified as nitrifiers while anoxic denitrifiers, aerobic denitrifiers and anammox bacteria also co‐existed in the system, contributing to TN removal. CONCLUSION Novel carriers with favorable hydrophilicity and electrophilicity were successfully prepared through a relatively facile approach, and a novel carriers‐based SND process enabled a shorter start‐up period, higher biomass and better TN removal efficiency. © 2017 Society of Chemical Industry

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Molecular microbial ecology of nitrification in an activated sludge process treating refinery wastewater

Cited by 14 publications

References 9 publications

Deep amoA amplicon sequencing reveals community partitioning within ammonia-oxidizing bacteria in the environmentally dynamic estuary of the River Elbe

Deep amoA amplicon sequencing reveals community partitioning within ammonia-oxidizing bacteria in the environmentally dynamic estuary of the River Elbe

Molecular characterization of bacteria and archaea in a bioaugmented zero-water exchange shrimp pond

Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

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