Effects of dissolved oxygen on microbial community of single-stage autotrophic nitrogen removal system treating simulating mature landfill leachate

Wen, Xin; Zhou, Jian; Wang, Jiale; Qing, Xiaoxia; He, Qiang

doi:10.1016/j.biortech.2016.07.023

Cited by 40 publications

(8 citation statements)

References 18 publications

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“…Bacterodietes and Proteobacteria were identified as including many bacteria responsible for nitrogen fixation and have been reported to be the most abundant in WWTPs . Planctomycetes and Chloroflexi were the phyla of anaerobic photoautotrophic bacteria and could become the dominant population in the SNAP process according to previous studies . Phylogenetic analyses indicated that Armatimonadetes was probably closely related to Chloroflexi or Actinobacteria and uncultured representatives from various terrestrial, aquatic habitats including temperate soils, anaerobic bioreactors, waste water treatment plants and geothermal soils …”

Section: Resultssupporting

confidence: 92%

“…23,24 Planctomycetes and Chloroflexi were the phyla of anaerobic photoautotrophic bacteria and could become the dominant population in the SNAP process according to previous studies. 25,26 Phylogenetic analyses indicated that Armatimonadetes was probably closely related to Chloroflexi or Actinobacteria and uncultured representatives from various terrestrial, aquatic habitats including temperate soils, anaerobic bioreactors, waste water treatment plants and geothermal soils. 27 Besides the phylum, other taxonomic units, i.e.…”

Section: Microbial Community Diversity and Species For Snap Processmentioning

confidence: 99%

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Simultaneous nitrogen and phosphorus removal by combined anammox and denitrifying phosphorus removal process

Zhang

Qiao

Shao³

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: Single-stage nitrogen removal using anammox and partial nitrification process (SNAP process) is a promising process to treat low C/N wastewater relying on ammonia-oxidizing bacteria (AOB) and anaerobic ammonium oxidation (anammox) bacteria. However, excess nitrate (NO 3 − ) in effluent is a common problem for the SNAP process. The denitrifying phosphorus removal (DPAO) process using NO 3 − as electron acceptor was adopted to reduce nitrate in effluent from the SNAP process, while phosphorus removal was also achieved simultaneously. Thus, a novel combined process (DPAO-SNAP process) was established to achieve nitrogen and phosphorus removal simultaneously.

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Section: Resultssupporting

confidence: 92%

Section: Microbial Community Diversity and Species For Snap Processmentioning

confidence: 99%

Simultaneous nitrogen and phosphorus removal by combined anammox and denitrifying phosphorus removal process

Zhang

Qiao

Shao³

et al. 2017

J of Chemical Tech & Biotech

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“…Excessively high DO transfer resistance in the biofilm results in the aerobic layer being too thin and complicates ammonia oxidation. Conversely, excessively low DO transfer resistance makes the anaerobic layer too thin and slows down denitrification [28,29]. Determining the DO content in the biofilm is helpful for understanding the mechanism of nitrogen removal.…”

Section: Simultaneous Nitrification and Denitrificationmentioning

confidence: 99%

Simultaneous nitrification and denitrification using a novel up-flow bio-electrochemical reactor

Tang¹,

Meng²,

Sheng³

et al. 2019

Desalination and Water Treatment

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Nitrogen removal is a problem in the field of water treatment, especially in the presence of sulfate. Conventional nitrification and denitrification are usually carried out in two separate reactors. In addition, the effect of sulfate on hydrogenotrophic denitrification is not clear. In this study, simultaneous nitrification and denitrification (SND) for nitrogen removal from water was conducted using a single novel up-flow bio-electrochemical reactor (UBER). The influence of dissolved oxygen (DO) on nitrogen removal was investigated. When influent DO was 7.0-8.0 mg L-1 , a heterotrophic nitrification zone (with DO 3.2-5.5 mg L-1) and a hydrogenotrophic denitrification zone (with DO 1.6-4.2 mg L-1) were obtained within the reactor, and the removal rates of NH 4 +-N and TN reached more than 90%. The distribution of DO inside developing biofilms was measured using microelectrodes. When DO in the hydrogenotrophic denitrification zone was 2.9 mg L-1 , DO inside the biofilm was just 0.5 mg L-1. The effect of sulfate on hydrogenotrophic denitrification was studied by regulating the S/N ratio of influent water. Simultaneous removal of nitrate and sulfate can be achieved at low S/N, and the removal rates of nitrate and sulfate were ~80%. With increasing S/N ratio, sulfide produced by sulfate reduction inhibited both denitrification and further sulfate reduction.

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“…Wen et al used a one-stage sequencing batch biofilm reactor (SBBR) ANAMMOX process to process leachate [ 48 ]. The study investigated the TN removal capacity of the SBBR under different dissolved oxygen conditions.…”

Section: The Removal Of Tn By Activated Sludgementioning

confidence: 99%

Treatment of Landfill Leachate Using Activated Sludge Technology: A Review

Wang

Li²,

Tan

et al. 2018

Archaea

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Landfill leachate contains a large amount of organic matter and ammoniacal nitrogen. As such, it has become a complex and difficult issue within the water treatment industry. The activated sludge process has been found to be a good solution with low processing costs and is now therefore the core process for leachate treatment, especially for nitrogen removal. This paper describes the characteristics and treatment of leachate. Treatment of leachate using the activated sludge process includes the removal of organic matter, ammoniacal nitrogen, and total nitrogen (TN). The core method for the removal of organic matter involves anaerobic treatment supplemented with an aerobic process. Ammoniacal nitrogen is commonly removed using a conventional aerobic treatment, and advanced TN removal is achieved using endogenous denitrification or an anaerobic ammonium oxidation (ANAMMOX) process. Since biological processes are the most economical method for TN removal, a key issue is how to tap the full potential of the activated sludge process and improve TN removal from leachate. This complex issue has been identified as the focus of current scholars, as well as an important future direction for leachate research and development.

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Effects of dissolved oxygen on microbial community of single-stage autotrophic nitrogen removal system treating simulating mature landfill leachate

Cited by 40 publications

References 18 publications

Simultaneous nitrogen and phosphorus removal by combined anammox and denitrifying phosphorus removal process

Simultaneous nitrogen and phosphorus removal by combined anammox and denitrifying phosphorus removal process

Simultaneous nitrification and denitrification using a novel up-flow bio-electrochemical reactor

Treatment of Landfill Leachate Using Activated Sludge Technology: A Review

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