Managing microbial communities in membrane biofilm reactors
Abstract
Membrane biofilm reactors (MBfRs) deliver gaseous substrates to biofilms that develop on the outside of gas-transfer membranes. When an MBfR delivers electron donors hydrogen (H 2 ) or methane (CH 4 ), a wide range of oxidized contaminants can be reduced as electron acceptors, e.g., nitrate, perchlorate, selenate, and trichloroethene. When O 2 is delivered as an electron acceptor, reduced contaminants can be oxidized, e.g., benzene, toluene, and surfactants. The MBfR's biofilm often harbors a complex microbial community; failure to control the growth of undesirable microorganisms can result in poor performance. Fortunately, the community's structure and function can be managed using a set of design and operation features as follows: gas pressure, membrane type, and surface loadings. Proper selection of these features ensures that the best microbial community is selected and sustained. Successful design and operation of an MBfR depends on a holistic understanding of the microbial community's structure and function. This involves integrating performance data with omics results, such as with stoichiometric and kinetic modeling.
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Because H2 is delivered directly to the biofilm through the gas-transfer membranes in an H2-MBfR, the H2-delivery capacity, controlled by the H2 pressure in the membrane lumen, is the more direct metric for ecological control.
“Because H2 is delivered directly the biofilm through the gas-transfer membranes in an H2-MBfR, the H2-delivery capacity, which is controlled by the H2 pressure in the membrane lumen, is the more direct metric for ecological control (Ontiveros-Valencia et al. 2018).”
From Microbial ecology of nitrate-, selenate-, selenite-, and sulfate-reducing bacteria in a H2-driven bioprocess (2024) · cites this paper as Ontiveros-Valencia et al. 2018
Microbial communities that develop in an H2-MBfR commonly have distinct hydrogenotrophic and heterotrophic bacteria populations, despite treating wastewater that does not contain organic carbon.
“The microbial communities that develop in an H2-MBfR commonly have distinct hydrogenotrophic and heterotrophic bacteria populations, despite treating waste-water that does not contain organic carbon (Ontiveros-Valencia et al. 2018).”
From Microbial ecology of nitrate-, selenate-, selenite-, and sulfate-reducing bacteria in a H2-driven bioprocess (2024) · cites this paper as Ontiveros-Valencia et al. 2018
In a microbial community founded on an inorganic electron donor and autotrophy, organic carbon and nutrient-available forms of nitrogen, sulfur, and selenium become available through endogenous decay of the autotrophic biomass.
“An important aspect of a microbial community that is founded on an inorganic electron donor and autotrophy is that organic carbon (C) and nutrient-available forms of nitrogen (N), sulfur (S), and selenium (Se) become available through endogenous decay of the autotrophic biomass (Okabe et al. 2005, Zevin et al. 2016, Ontiveros-Valencia et al. 2018).”
From Microbial ecology of nitrate-, selenate-, selenite-, and sulfate-reducing bacteria in a H2-driven bioprocess (2024) · cites this paper as Ontiveros-Valencia et al. 2018
Cited by
Sorted by citations
Boltz, J. P., & Rittmann, B. E. (2024) · FEMS Microbiology Ecology · doi:10.1093/femsec/fiae125 · Cited by 10 · see citing works
Self-citation
- Authors
- Ontiveros-Valencia, A., Zhou, C., Zhao, H.-P., Krajmalnik-Brown, R., Tang, Y., & Rittmann, B. E.
- Venue
- Applied Microbiology and Biotechnology
- Published
- 2018-08-20
- Volume
- 102
- Issue
- 21
- Pages
- 9003-9014
- ISSN
- 0175-7598
- 1432-0614
- Cited by
- 39
- References
- 0
- Language
- en
- Licence
- www.springer.com/tdm (tdm)
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