Research on microbial structures, functions and metabolic pathways in an advanced denitrification system coupled with aerobic methane oxidation based on metagenomics

Liu, Dengping; Yang, Yefeng; Jia, Ai; Li, Yancheng; Xing, Yi; Li, Jiang

doi:10.1016/j.biortech.2021.125047

Cited by 37 publications

(2 citation statements)

References 48 publications

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“…Information Processing (6.1%) Cellular Processes (4.5%), Human Diseases (4.2%), and Organismal Systems (2.1%), with Metabolism (61%) being the main functional metabolism, which is the same as the findings of (Yin and Wang., 2021) and (Liu et al, 2021). In Cellular Processes, Human Diseases, the relative abundance of the UV0 group without UV irradiation was higher than the other four groups, indicating that the growth and reproduction of microorganisms were inhibited by UV irradiation, which also corresponds to the microbial communities mentioned above.…”

Section: Metabolic Pathwaysmentioning

confidence: 90%

“…The relative abundance of functional genes narB and nirA associated with Assimilatory nitrate reduction were both low, and the relative abundance of nirA gene in N02reduced NH4 + was highest at UV0. The relative abundance of nifD/K/H and anfG genes in Nitrification action were both highest at UV10, which may be due to the fact that nitrogen fixation energy is mainly caused by light irradiation or oxidation of the carbon source (Liu et al, 2021), but nifD/K/H gene relative abundance decreased more slope after 10 min of UV irradiation, which indicates that after a certain UV irradiation duration (>10 min), the radiation dose increased and caused an inhibitory effect on it.…”

Section: Metabolic Pathwaysmentioning

confidence: 98%

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Effect of UV irradiation on microbial structure, metabolic pathways and functional genes of nitrogen metabolism in highland wastewater

2022

Global NEST: The International Journal

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<p>In this experiment, in the background of the plateau environment, the effects of ultraviolet irradiation on the microbial community structure, metabolic pathways and nitrogen metabolism function genes of sewage were studied at 0 (control group), 5, 10, 30, and 180 min. The results showed that the increase of UV irradiation time promoted the microbial richness of sewage, but decreased the microbial diversity. In terms of community structure, the increase of ultraviolet irradiation time will inhibit or promote some bacterial genera, for example, it has a promoting effect on Bacteroidota, norank_f_ Saprospiraceae, etc., and an inhibitory effect on Phreatobacter. The relative abundance of metabolic pathways changed significantly with the increase of UV irradiation time, and the change trends at different metabolic levels were the same. In nitrogen metabolism pathways, the relative abundance of genes involved in nitrification and denitrification functions was inhibited by the duration of UV irradiation.</p>

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Section: Metabolic Pathwaysmentioning

confidence: 90%

Section: Metabolic Pathwaysmentioning

confidence: 98%

Effect of UV irradiation on microbial structure, metabolic pathways and functional genes of nitrogen metabolism in highland wastewater

2022

Global NEST: The International Journal

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Application of visual tracking based on infrared target imaging in aerobics action evaluation system

Lv,

Yan

2023

Opt Quant Electron

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Implementation of an Upflow Fixed Bed Bioreactor for Denitrification Coupled to Methane Oxidation: Performance and Biomass Development Under Anoxic Conditions

Molina-Macías,

Londoño,

Pino

et al. 2024

Water Air Soil Pollut

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Denitrification coupled to methane oxidation (DOM) has been shown to be an appropriate process for wastewater treatment applications, since it can reduce greenhouse gas emissions and nitrogen discharges, making wastewater treatment plants more environmentally sustainable. Study of DOM has focused on laboratory-scale application using membrane biological reactors (MBR) or sequency batch reactors (SBR), which have been shown to be able to retain DOM biomass and therefore appropriate for use with this process. However, it is necessary to expand knowledge of the behavior of this process using other configurations, with a view to scaling up. Therefore, in this study, an upflow fixed bed bioreactor (UFBR) was implemented using plastic carriers such as bioballs and Biochips® to carry out the DOM process under anoxic conditions. The reactor reached stable nitrogen removal conditions after approximately 400 days of continuous operation, forming a biomass composed of denitrifying methane-oxidizing microorganisms where the genus Anaerolinea and Methylocystis predominated. Once the biomass was formed and the DOM process was stabilized, maximum nitrite and nitrate removal rates of 17.6 mgN-NO2−/L-d and 8.9 mgN-NO3−/L-d, respectively, and a removal efficiency of methane up to 77% were obtained. This demonstrates the feasibility of the application of the DOM process under anoxic conditions using fixed bed bioreactors, which is promising for further nitrogen removal from wastewater using a varied reactor configuration easily to scaled-up.

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Research on microbial structures, functions and metabolic pathways in an advanced denitrification system coupled with aerobic methane oxidation based on metagenomics

Cited by 37 publications

References 48 publications

Effect of UV irradiation on microbial structure, metabolic pathways and functional genes of nitrogen metabolism in highland wastewater

Effect of UV irradiation on microbial structure, metabolic pathways and functional genes of nitrogen metabolism in highland wastewater

Application of visual tracking based on infrared target imaging in aerobics action evaluation system

Implementation of an Upflow Fixed Bed Bioreactor for Denitrification Coupled to Methane Oxidation: Performance and Biomass Development Under Anoxic Conditions

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