Escherichia coli Removal in Biochar-Modified Biofilters: Effects of Biofilm
The presence of microbial contaminants in urban stormwater is a significant concern for public health; however, their removal by traditional stormwater biofilters has been reported as inconsistent and inadequate. Recent work has explored the use of biochar to improve performance of stormwater biofil...
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| Veröffentlicht in: | PloS one 2016-12, Vol.11 (12), p.e0167489-e0167489 |
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| description | The presence of microbial contaminants in urban stormwater is a significant concern for public health; however, their removal by traditional stormwater biofilters has been reported as inconsistent and inadequate. Recent work has explored the use of biochar to improve performance of stormwater biofilters under simplified conditions that do not consider potential effects of biofilm development on filter media. The present study investigates the role of biofilm on microbial contaminant removal performance of stormwater biofilters. Pseudomonas aeruginosa biofilms were formed in laboratory-scale sand and biochar-modified sand packed columns, which were then challenged with Escherichia coli laden synthetic stormwater containing natural organic matter. Results suggests that the presence of biofilm influences the removal of E. coli. However, the nature of the influence depends on the specific surface area and the relative hydrophobicity of filter media. The distribution of attached bacteria within the columns indicates that removal by filter media varies along the length of the column: the inlet was the primary removal zone regardless of experimental conditions. Findings from this research inform the design of field-scale biofilters for better and consistent performance in removing microbial contaminants from urban stormwater. |
| doi_str_mv | 10.1371/journal.pone.0167489 |
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Recent work has explored the use of biochar to improve performance of stormwater biofilters under simplified conditions that do not consider potential effects of biofilm development on filter media. The present study investigates the role of biofilm on microbial contaminant removal performance of stormwater biofilters. Pseudomonas aeruginosa biofilms were formed in laboratory-scale sand and biochar-modified sand packed columns, which were then challenged with Escherichia coli laden synthetic stormwater containing natural organic matter. Results suggests that the presence of biofilm influences the removal of E. coli. However, the nature of the influence depends on the specific surface area and the relative hydrophobicity of filter media. The distribution of attached bacteria within the columns indicates that removal by filter media varies along the length of the column: the inlet was the primary removal zone regardless of experimental conditions. Findings from this research inform the design of field-scale biofilters for better and consistent performance in removing microbial contaminants from urban stormwater.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0167489</identifier><identifier>PMID: 27907127</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Aquifers ; Bacteria ; Biofilms ; Biofilters ; Biofiltration ; Biology and Life Sciences ; Charcoal ; Charcoal - chemistry ; Contaminants ; E coli ; Efficiency ; Engineering research ; Environmental engineering ; Environmental science ; Escherichia coli ; Filter media ; Filtration - methods ; Hydrophobicity ; Laboratories ; Medicine and Health Sciences ; Microbial contamination ; Microbial mats ; Microorganisms ; Nanoparticles ; Organic matter ; Packed columns ; Physical Sciences ; Physiological aspects ; Pollutant removal ; Porous materials ; Pseudomonas aeruginosa ; Public health ; Sand ; Sand & gravel ; Storm sewers ; Storms ; Stormwater ; Studies ; Surface area ; Waste Disposal, Fluid ; Water Microbiology ; Water pollution ; Water Purification - methods ; Water supply engineering</subject><ispartof>PloS one, 2016-12, Vol.11 (12), p.e0167489-e0167489</ispartof><rights>COPYRIGHT 2016 Public Library of Science</rights><rights>2016 Afrooz, Boehm. 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Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2016 Afrooz, Boehm 2016 Afrooz, Boehm</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c725t-3449274e73981ed78659485eb6b429f899a01c61199e73e58ddf66e6e06798a93</citedby><cites>FETCH-LOGICAL-c725t-3449274e73981ed78659485eb6b429f899a01c61199e73e58ddf66e6e06798a93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5132165/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5132165/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,2915,23845,27901,27902,53766,53768,79569,79570</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27907127$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Afrooz, A R M Nabiul</creatorcontrib><creatorcontrib>Boehm, Alexandria B</creatorcontrib><title>Escherichia coli Removal in Biochar-Modified Biofilters: Effects of Biofilm</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>The presence of microbial contaminants in urban stormwater is a significant concern for public health; however, their removal by traditional stormwater biofilters has been reported as inconsistent and inadequate. Recent work has explored the use of biochar to improve performance of stormwater biofilters under simplified conditions that do not consider potential effects of biofilm development on filter media. The present study investigates the role of biofilm on microbial contaminant removal performance of stormwater biofilters. Pseudomonas aeruginosa biofilms were formed in laboratory-scale sand and biochar-modified sand packed columns, which were then challenged with Escherichia coli laden synthetic stormwater containing natural organic matter. Results suggests that the presence of biofilm influences the removal of E. coli. However, the nature of the influence depends on the specific surface area and the relative hydrophobicity of filter media. The distribution of attached bacteria within the columns indicates that removal by filter media varies along the length of the column: the inlet was the primary removal zone regardless of experimental conditions. Findings from this research inform the design of field-scale biofilters for better and consistent performance in removing microbial contaminants from urban stormwater.</description><subject>Aquifers</subject><subject>Bacteria</subject><subject>Biofilms</subject><subject>Biofilters</subject><subject>Biofiltration</subject><subject>Biology and Life Sciences</subject><subject>Charcoal</subject><subject>Charcoal - chemistry</subject><subject>Contaminants</subject><subject>E coli</subject><subject>Efficiency</subject><subject>Engineering research</subject><subject>Environmental engineering</subject><subject>Environmental science</subject><subject>Escherichia coli</subject><subject>Filter media</subject><subject>Filtration - methods</subject><subject>Hydrophobicity</subject><subject>Laboratories</subject><subject>Medicine and Health Sciences</subject><subject>Microbial contamination</subject><subject>Microbial mats</subject><subject>Microorganisms</subject><subject>Nanoparticles</subject><subject>Organic matter</subject><subject>Packed columns</subject><subject>Physical Sciences</subject><subject>Physiological aspects</subject><subject>Pollutant removal</subject><subject>Porous materials</subject><subject>Pseudomonas aeruginosa</subject><subject>Public health</subject><subject>Sand</subject><subject>Sand & gravel</subject><subject>Storm sewers</subject><subject>Storms</subject><subject>Stormwater</subject><subject>Studies</subject><subject>Surface area</subject><subject>Waste Disposal, Fluid</subject><subject>Water Microbiology</subject><subject>Water pollution</subject><subject>Water Purification - 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| subjects | Aquifers Bacteria Biofilms Biofilters Biofiltration Biology and Life Sciences Charcoal Charcoal - chemistry Contaminants E coli Efficiency Engineering research Environmental engineering Environmental science Escherichia coli Filter media Filtration - methods Hydrophobicity Laboratories Medicine and Health Sciences Microbial contamination Microbial mats Microorganisms Nanoparticles Organic matter Packed columns Physical Sciences Physiological aspects Pollutant removal Porous materials Pseudomonas aeruginosa Public health Sand Sand & gravel Storm sewers Storms Stormwater Studies Surface area Waste Disposal, Fluid Water Microbiology Water pollution Water Purification - methods Water supply engineering |
| title | Escherichia coli Removal in Biochar-Modified Biofilters: Effects of Biofilm |
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