Sustainable micropollutant bioremediation via stormwater biofiltration system

LeviRam, Inbar; Gross, Amit; Lintern, Anna; Henry, Rebekah; Schang, Christelle; Herzberg, Moshe; McCarthy, David Thomas

doi:10.1016/j.watres.2022.118188

Cited by 6 publications

(3 citation statements)

References 53 publications

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“…19 For instance, Ulrich et al 20 modified stormwater biofilters with biochar and achieved superior TOrC removal over traditional unamended biofilters. There are similar recent reports of improved high trace organic 21 and dissolved nutrient 22 removal in black carbon modified stormwater bioretention systems. Even amendment of black carbon in bioretention cells, however, does not represent a complete solution because sorption capacity can be exhausted over extended time periods.…”

Section: Introductionsupporting

confidence: 82%

Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure

Tanmoy,

LeFevre

2024

Environ. Sci.: Water Res. Technol.

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Section: Introductionsupporting

confidence: 82%

Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure

Tanmoy,

LeFevre

2024

Environ. Sci.: Water Res. Technol.

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“…When pyrazole was reintroduced to the influent, concentrations in the effluent and intermediate layers remained below 10 μg/L (Figure S4), indicating that the biodegradation capacity was maintained despite the temporary lack of pyrazole in the influent. These results could indicate that pyrazole desorption from the GAC was beneficial to maintain an active biomass despite the absence of pyrazole in the influent, as shown in previous research. , Herzberg et al demonstrated that when substrate-free influent was fed to a biologically active GAC filter, active biomass was more concentrated in the deepest layers of the biofilm, indicating that desorption was supplying the substrate and maintaining an active biofilm. However, results from BAC 3 also show that pyrazole degrading biomass was partially retained in the filter despite the full absence of pyrazole.…”

Section: Results and Discussionsupporting

confidence: 59%

Bioaugmentation of Biological Activated Carbon Filters for Enhanced Micropollutant Removal

et al. 2022

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Granular activated carbon (GAC) filtration is an important technology for micropollutant removal from water. In GAC filters, micropollutants adsorb onto the activated carbon and can also be biodegraded, prolonging the filter lifetime. Biodegradation can be enhanced by introducing micropollutants degrading microorganisms to the filters, that is, through bioaugmentation. We assessed pyrazole adsorption to activated carbon and biodegradation in GAC filters inoculated with pyrazole degrading biomass originating from a drinking water plant. Pyrazole was chosen as a model micropollutant because it was detected at high levels in 2015 in Dutch surface water, and little is known about its removal mechanism in water treatment. GAC filters without inoculation and inoculated at different moments were operated, and breakthrough curves were fit to an adsorption and biodegradation model based on surface diffusion and Monod kinetics. Pyrazole biodegradation was successfully transferred from a sand filter to GAC filters and contributed to decreasing pyrazole concentrations below 10 μg/L in the GAC filter effluent. Pyrazole degradation was a stable process that could be maintained despite the lack of pyrazole in the filter influent for up to 30 days. Achieving a combination of adsorption and biodegradation in GAC filters is essential to sustain high micropollutant removals in the long term.

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“…Indeed, the addition of specific bacteria for pollutant removal (i.e. bioaugmentation) has previously been proposed for removing other stormwater pollutants [89,90], including the potential for enhancing inactivation of stormwater pathogens [91].…”

Section: Supportive and Suppressive Effects Of Resident Bacterial Com...mentioning

confidence: 99%

Significant antimicrobial-producing vegetation uniquely shapes the stormwater biofilter microbiome with implications for enhanced faecal pathogen inactivation

Galbraith

Henry²,

McCarthy³

2023

PLOS Water

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Biofilters demonstrate promising yet inconsistent removal of faecal pathogens from stormwater. Antimicrobial-producing plants represent safe, inexpensive biofilter design features which can significantly enhance faecal microbe treatment. The microbiota naturally inhabiting biofilters have additionally been established as key mediators of faecal microbe inactivation. To date, however, it remains unknown: (1) to what extent plants, including significant antimicrobial-producing plants, influence the biofilter microbiome; and (2) how this in turn impacts faecal microorganism survival/die-off. The present study employed 16S rRNA sequencing to examine these relationships throughout the soil profiles of differently vegetated biofilters over time. It was found that plants had subtle but significant influences on the composition and structure of resident biofilter bacterial communities, with varying impacts observed throughout biofilter profiles. Bacterial communities inhabiting biofilters comprising significant antimicrobial-producing plants demonstrated distinct compositional and taxonomic differences relative to other configurations. In particular, compared to other biofilters, the best-performing configuration for faecal bacterial treatment, Melaleuca linariifolia (significant antimicrobial-producing plant), exhibited both higher and lower relative frequencies of putative faecal bacterial antagonists (e.g. Actinobacteria) and mutualists (e.g. certain Gammaproteobacteria), respectively. These preliminary findings suggest that antimicrobial plants may enhance populations of microbiota which suppress faecal bacterial survival, and highlight the plant-microbiome relationship as a novel area of focus for optimising biofilter performance.

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Sustainable micropollutant bioremediation via stormwater biofiltration system

Cited by 6 publications

References 53 publications

Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure

Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure

Bioaugmentation of Biological Activated Carbon Filters for Enhanced Micropollutant Removal

Significant antimicrobial-producing vegetation uniquely shapes the stormwater biofilter microbiome with implications for enhanced faecal pathogen inactivation

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