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Depth profiles of biological aerated contactors: Characterizing microbial activity treating reduced contaminants
Citation:
Keithley, A., V. Gomez-Alvarez, D. Williams, H. Ryu, AND D. Lytle. Depth profiles of biological aerated contactors: Characterizing microbial activity treating reduced contaminants. Journal of Water Process Engineering. Elsevier B.V., Amsterdam, Netherlands, 56:104360, (2023). https://doi.org/10.1016/j.jwpe.2023.104360
Impact/Purpose:
The biological treatment process consisting of an aerated contactor and filter is effective for groundwaters containing elevated ammonia and other reduced contaminants, including iron, manganese, arsenic, and methane. Information on how the microbial community is distributed across the depth of aerated contactors is lacking. This project tested the treatment performance of aerated contactors and evaluated metals concentrations on the media surface as well as biomass concentration, extracullar polymeric substances concentration, ecoenzyme activity potentials, gene concentrations, and the composition and genetic functional potential of the microbial community across the depth of 5 pilot-scale aerated contactors. The microbial activity profiles through aerated contactors differed from what is typically reported for groundwater biofilters, suggesting that the different reactor flow and dissolved oxygen profiles impacted the microbial community. These results can inform the design of aerated contactors and may be of interest to engineers and water utility personnel.
Description:
EPA Pilot of source water Ammonia -The biological treatment process consisting of an aerated contactor and filter is effective for groundwaters containing elevated ammonia and other reduced contaminants, including iron, manganese, arsenic, and methane. Information on how the microbial community is distributed across the depth of aerated contactors is lacking. This project tested the treatment performance of aerated contactors and evaluated metals concentrations on the media surface as well as biomass concentration, extracullar polymeric substances concentration, ecoenzyme activity potentials, gene concentrations, and the composition and genetic functional potential of the microbial community across the depth of 5 pilot-scale aerated contactors. The microbial activity profiles through aerated contactors differed from what is typically reported for groundwater biofilters, suggesting that the different reactor flow and dissolved oxygen profiles impacted the microbial community. These results can inform the design of aerated contactors and may be of interest to engineers and water utility personnel.
URLs/Downloads:
DOI: Depth profiles of biological aerated contactors: Characterizing microbial activity treating reduced contaminants
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