Advanced treatment of effluent from municipal wastewater treatment plant by strengthened ecological floating bed

Huang, Zijin; Kong, Fanyu; Li, Yue; Xu, Guangming; Yuan, Ruoyu; Wang, Sen

doi:10.1016/j.biortech.2020.123358

Cited by 32 publications

(4 citation statements)

References 47 publications

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“…Contrarily, Ps. stutzeri and Pa. denitrificans were chosen as they are often used as model denitrifying bacteria (Jiang et al, 2020; Kim et al, 2020) and also are detected in WWTPs (Han et al, 2020; Huang et al, 2020; Wang et al, 2014a). All strains harbor a full set of denitrifying functional genes, according to their genomes on NCBI (http://www.ncbi.nlm.nih.gov/; Details can be found in Table S1).…”

Section: Methodsmentioning

confidence: 99%

Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study

Zhou

Suenaga

Chang

et al. 2020

Biotech & Bioengineering

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Nitrous oxide (N2O), a potent greenhouse gas, is reduced to N2 gas by N2O‐reducing bacteria (N2ORB), a process which represents an N2O sink in natural and engineered ecosystems. The N2O sink activity by N2ORB depends on temperature and O2 exposure, yet the specifics are not yet understood. This study explores the effects of temperature and oxygen exposure on biokinetics of pure culture N2ORB. Four N2ORB, representing either clade I type nosZ (Pseudomonas stutzeri JCM5965 and Paracoccus denitrificans NBRC102528) or clade II type nosZ (Azospira sp. strains I09 and I13), were individually tested. The higher activation energy for N2O by Azospira sp. strain I13 (114.0 ± 22.6 kJ mol−1) compared with the other tested N2ORB (38.3–60.1 kJ mol−1) indicates that N2ORB can adapt to different temperatures. The O2 inhibition constants (KI) of Azospira sp. strain I09 and Ps. stutzeri JCM5965 increased from 0.06 ± 0.05 and 0.05 ± 0.02 μmol L−1 to 0.92 ± 0.24 and 0.84 ± 0.31 μmol L−1, respectively, as the temperature increased from 15°C to 35°C, while that of Azospira sp. strain I13 was temperature‐independent (p = 0.106). Within the range of temperatures examined, Azospira sp. strain I13 had a faster recovery after O2 exposure compared with Azospira sp. strain I09 and Ps. stutzeri JCM5965 (p < 0.05). These results suggest that temperature and O2 exposure result in the growth of ecophysiologically distinct N2ORB as N2O sinks. This knowledge can help develop a suitable N2O mitigation strategy according to the physiologies of the predominant N2ORB.

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Section: Methodsmentioning

confidence: 99%

Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study

Zhou

Suenaga

Chang

et al. 2020

Biotech & Bioengineering

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“…There are many ecological relationships and interactions among microbial communities involved in nitrogen transformation [89]. The common bacteria in CWs, which can be divided into Proteobacteria, Bacteroidetes, Chloroflexi, Firmicutes, Planctomycetia, Acidobacteria, and Actinobacteria at the phylum level, account for more than 80.00% of the total bacterial population [24,25,27,90,91]. At the phylum level, denitrifying bacteria are mainly classified as Proteobacteria, Actinomycetes, Aquifaceae, Bacteroides, and Firmicutes, which include at least one strain with denitrification ability [92,93].…”

Section: Community Structure and Abundance Of Microorganismsmentioning

confidence: 99%

Plant Carbon Sources for Denitrification Enhancement and Its Mechanism in Constructed Wetlands: A Review

et al. 2022

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Nitrogen pollution in water bodies is a serious environmental problem worldwide. Plant carbonsource (PCS) enhanced denitrification in constructed wetlands (CWs) for wastewater with low chemical oxygen demand to total nitrogen (COD/N) has been one of the most exciting research topics. This paper summarized the related studies with VOSviewer software and found that the major interests were denitrification performance and mechanism in CWs. This article mainly focused on the PCSs’ characteristics, denitrification rate, the influences of key environmental and operational parameters, surface morphology variation, microbial community structure, and denitrification genes. Engineering prospects and existing problems were also introduced. PCSs’ degradation consumes DO and creates favorable conditions for denitrification. The COD/N of wastewater should be maintained at 4–5 by adding PCSs, thus improving denitrification performance and reducing nitrous oxide emission. Aerobic degradation, anaerobic fermentation, dissimilatory nitrate reduction to ammonium, and sulfate reduction processes may consume the carbon released by PCSs depending on the influent quality and environmental conditions. More attention should be paid to the reduction of greenhouse gases and emerging pollutants in CWs with PCSs.

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“…In recent years, ecological channels have been widely used in practical projects because of its ecological friendliness, and can better solve the problems of agricultural non-point source pollution (Kumwimba et al 2017). In recent years, the research of two-stage section ecological channel has been widely concerned (Chen 2013;Zeng et al 2014;Huang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

The streamwise velocity distribution in a two-stage channel with ice cover

Bai

Sun

2021

Water Supply

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The problem of agricultural non-point source pollution has become increasingly serious. How to determine the ecological drainage ditch system is one of the effective methods to solve the agricultural non-point source pollution. This research study focuses on the velocity distribution in a two-stage section ecological channel with ice cover. The results show that the two-stage section channel with ice cover can effectively reduce the flow velocity in the channel and increase the retention time of water in the channel. By comparing with the experimental data, the accuracy of the analytical solution is high, which provides a theoretical reference for the transport of sediment and pollutions in a two-stage section channel with ice cover in the future.

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Advanced treatment of effluent from municipal wastewater treatment plant by strengthened ecological floating bed

Cited by 32 publications

References 47 publications

Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study

Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study

Plant Carbon Sources for Denitrification Enhancement and Its Mechanism in Constructed Wetlands: A Review

The streamwise velocity distribution in a two-stage channel with ice cover

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Advanced treatment of effluent from municipal wastewater treatment plant by strengthened ecological floating bed

Cited by 32 publications

References 47 publications

Temperature and oxygen level determine N2O respiration activities of heterotrophic N2O‐reducing bacteria: Biokinetic study

Temperature and oxygen level determine N2O respiration activities of heterotrophic N2O‐reducing bacteria: Biokinetic study

Plant Carbon Sources for Denitrification Enhancement and Its Mechanism in Constructed Wetlands: A Review

The streamwise velocity distribution in a two-stage channel with ice cover

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Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study

Temperature and oxygen level determine N₂O respiration activities of heterotrophic N₂O‐reducing bacteria: Biokinetic study