Energy-Efficient Nitrification and Microbial Community in a Completely Stirred Membrane Biofilm Reactor

2015 ◽  
Vol 32 (3) ◽  
pp. 179-184 ◽  
Author(s):  
Ergin Taskan ◽  
Özge Hanay ◽  
Halil Hasar
Keyword(s):  
Microbial Community ◽  
Energy Efficient ◽  
Biofilm Reactor ◽  
Membrane Biofilm Reactor

Total electron acceptor loading and composition affect hexavalent uranium reduction and microbial community structure in a membrane biofilm reactor

2017 ◽  
Vol 125 ◽  
pp. 341-349 ◽  
Author(s):  
Aura Ontiveros-Valencia ◽  
Chen Zhou ◽  
Zehra Esra Ilhan ◽  
Louis Cornette de Saint Cyr ◽  
Rosa Krajmalnik-Brown ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Electron Acceptor ◽  
Microbial Community Structure ◽  
Biofilm Reactor ◽  
Uranium Reduction ◽  
Total Electron ◽  
Hexavalent Uranium ◽  
Membrane Biofilm Reactor

Microbial community structure during nitrate and perchlorate reduction in ion-exchange brine using the hydrogen-based membrane biofilm reactor (MBfR)

2010 ◽  
Vol 101 (10) ◽  
pp. 3747-3750 ◽  
Author(s):  
Steven W. Van Ginkel ◽  
Regina Lamendella ◽  
William P. Kovacik Jr. ◽  
Jorge W. Santo Domingo ◽  
Bruce E. Rittmann
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Ion Exchange ◽  
Microbial Community Structure ◽  
Biofilm Reactor ◽  
Perchlorate Reduction ◽  
Membrane Biofilm Reactor

scholarly journals Nitrate Removal and Dynamics of Microbial Community of A Hydrogen-Based Membrane Biofilm Reactor at Diverse Nitrate Loadings and Distances from Hydrogen Supply End

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3196
Author(s):  
Minmin Jiang ◽  
Yuanyuan Zhang ◽  
Yuhang Yuan ◽  
Yuchao Chen ◽  
Hua Lin ◽  
...  
Keyword(s):  
Microbial Community ◽  
High Throughput Sequencing ◽  
Nitrate Removal ◽  
Biofilm Reactor ◽  
Back Diffusion ◽  
Membrane Biofilm Reactor ◽  
Functional Bacteria ◽  
Hydrogen Supply ◽  
N Metabolism ◽  
The Impact

The back-diffusion of inactive gases severely inhibits the hydrogen (H2) delivery rate of the close-end operated hydrogen-based membrane biofilm reactor (H2-based MBfR). Nevertheless, less is known about the response of microbial communities in H2-based MBfR to the impact of the gases’ back-diffusion. In this research, the denitrification performance and microbial dynamics were studied in a H2-based MBfR operated at close-end mode with a fixed H2 pressure of 0.04 MPa and fed with nitrate (NO3−) containing influent. Results of single-factor and microsensor measurement experiments indicate that the H2 availability was the decisive factor that limits NO3− removal at the influent NO3− concentration of 30 mg N/L. High-throughput sequencing results revealed that (1) the increase of NO3− loading from 10 to 20–30 mg N/L resulted in the shift of dominant functional bacteria from Dechloromonas to Hydrogenophaga in the biofilm; (2) excessive NO3− loading led to the declined relative abundance of Hydrogenophaga and basic metabolic pathways as well as counts of most denitrifying enzyme genes; and (3) in most cases, the decreased quantity of N metabolism-related functional bacteria and genes with increasing distance from the H2 supply end corroborates that the microbial community structure in H2-based MBfR was significantly impacted by the gases’ back-diffusion.

scholarly journals Insights into the removal of gaseous oxytetracycline by combined ozone and membrane biofilm reactor

2021 ◽  
Vol 27 (6) ◽  
pp. 210469-0
Author(s):  
Z.S. Wei ◽  
X.L. Chen ◽  
Z.S. Huang ◽  
H.Y. Jiao ◽  
X.L. Xiao
Keyword(s):  
Molecular Structure ◽  
High Temperature ◽  
Microbial Community ◽  
Cost Effective ◽  
Biofilm Reactor ◽  
Community Diversity ◽  
Ecological Environment ◽  
The Novel ◽  
Waste Gas ◽  
Membrane Biofilm Reactor

Gaseous emerging organic compounds (GEOCs) may harm human health and ecological environment. High temperature composting of livestock manure may produce oxytetracycline (OTC) waste gas. Here, we investigated treatment OTC in waste gas by combined ozone and membrane biofilm reactor (MBfR) with desulphurizing bacteria. The performance, the microbial community, gene function and the mechanism for OTC removal in the ozone-MBfR were evaluated. The ozone-MBfR system could achieve more degradation of OTC completely than MBfR. Desulfovibrio, Lentimicrobium, Aminivibrio, Thioalkalispira, Erysipelothrix, Mangroviflexus, Azoarcus, Thauera, Geobacter, Paracoccus, and Dethiosulfatibacter were the dominant genera. Pseudomonas, Escherichia, Bacteroides, Salmonella, Paracoccus, Stappia were contribution to OTC degradation. With the addition of ozone, the community diversity increased; some genera, such as Tenericutes- uncultured, and Desulfovibrio, increased in abundance, whereas others, such as Thauera, and Petrimonas, decreased. Ozone destroyed the enol structure in OTC molecular structure and produces biodegradable products, ozone oxidation was combined with biodegradation, to achieve thoroughly degrade OTC in waste gas. The novel hybrid ozone-MBfR is a cost-effective and robust alternative to GEOCs treatment.

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