Effect of sodium silicate on drinking water biofilm development

Munoz, Sebastian; Trueman, Benjamin F.; Li, Bofu; Gagnon, Graham A.

doi:10.1039/d1ew00682g

Cited by 2 publications

(1 citation statement)

References 65 publications

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“…Five biofilm annular reactors (Model 1320 LS; Biosurface Technologies Corp., Bozeman, Montana) were operated for 13 months, from September 30, 2019 to October 21, 2020. Annular reactors have been commonly used as bench-scale models to mimic water distribution systems and to simulate biofilm growth 4 , 12 , 83 , 84 . The annular reactors comprised rotating inner cylinders that subjected biofilm growing on removable, flush-mounted coupons to shear forces typical of water systems, independent of flow-controlled residence time.…”

Section: Methodsmentioning

confidence: 99%

Responses of drinking water bulk and biofilm microbiota to elevated water age in bench-scale simulated distribution systems

Healy,

Ehde,

Bartholow

et al. 2024

npj Biofilms Microbiomes

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Reductions in nonresidential water demand during the COVID-19 pandemic highlighted the importance of understanding how water age impacts drinking water quality and microbiota in piped distribution systems. Using benchtop model distribution systems, we aimed to characterize the impacts of elevated water age on microbiota in bulk water and pipe wall biofilms. Five replicate constant-flow reactors were fed with municipal chloraminated tap water for 6 months prior to building closures and 7 months after. After building closures, chloramine levels entering the reactors dropped; in the reactor bulk water and biofilms the mean cell counts and ATP concentrations increased over an order of magnitude while the detection of opportunistic pathogens remained low. Water age, and the corresponding physicochemical changes, strongly influenced microbial abundance and community composition. Differential initial microbial colonization also had a lasting influence on microbial communities in each reactor (i.e., historical contingency).

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Section: Methodsmentioning

confidence: 99%