N3.02 Afrooz 2017 ReNUWIt Annual Meeting Poster
Abstract/Contents
- Abstract
- Stormwater runoff can be an alternative water source in urban areas if managed (i.e., treated and recycled) properly. However, urban runoff is often contaminated with microbial contaminants. Improving pathogen and fecal indicator bacteria (FIB) removal efficiency of traditional biofilters by adding filter-media amendments is an active research area. We aim to provide with an improved understanding of the role of media amendments, media properties, and media aging (i.e., physicochemical or biological) on FIB and pathogen removal performance of stormwater biofilters. Various geomedia, including compost, biochar, and iron filings, were added to plain sand columns; which were then challenged with E. coli, Enterococci, Salmonella, spp., Staphylococcus spp., or MS2 laden synthetic or natural stormwater to observe improvements in their microbial removal performances. Both iron filings and biochar amendments significantly improved biofilter’s pathogen removal efficiency. Long-term column experiments were performed to investigate the effects of aging on FIB removal capacity of those geomedia: which revealed biochar as the most promising media for long-term field-applications. Experimental results suggest physical weathering and biofilm growth affect log removal of E. coli, however, biochar columns (biochar: sand=3:7, by volume) are capable of achieving 1-2 log removal depending on the biochar feedstock, pyrolysis temperature, and particle size. The removal is even higher (3-4 log unit) for pathogenic bacteria. Findings from this research will be utilized to inform the design of field-scale biofilters for better and consistent performance in removing microbes from stormwater runoff.
Description
Type of resource | other |
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Date created | May 2017 |
Creators/Contributors
Author | Boehm, Alexandria |
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Author | Torkelson, Andrew |
Author | McCray, John |
Author | Nelson, Kara |
Author | Afrooz, Nabiul |
Author | Maxwell, Reed |
Author | Mohanty, Sanjay |
Subjects
Subject | Re-inventing the Nation’s Urban Water Infrastructure |
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Subject | ReNUWIt |
Subject | N3.02 |
Subject | Natural Water Infrastructure Systems |
Subject | Distributed stormwater treatment unit processes |
Subject | California |
Subject | bacteria |
Subject | bed filter |
Subject | biofilm |
Subject | biofilter |
Subject | bioretention media |
Subject | colloid mobilization |
Subject | escherichia coli removal |
Subject | fecal indicator bacteria |
Subject | filtration |
Subject | heterogeneous porous |
Subject | media intermittent flow |
Subject | natural organic matter |
Subject | nitrogen removal |
Subject | low impact development |
Subject | phosphorus |
Subject | pollutant removal |
Subject | porous media |
Subject | pseudomonas aeruginosa |
Subject | retention |
Subject | stormwater |
Subject | stormwater control measures (scms) |
Subject | transport |
Subject | viruses |
Subject | water |
Bibliographic information
Related Publication | Afrooz, A. R. M. N., & Boehm, A. B. (2016). Escherichia coli Removal in Biochar-Modified Biofilters: Effects of Biofilm. Plos One, 11(12). http://doi.org/10.1371/journal.pone.0167489 |
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Related Publication | Related published work Afrooz, A. R. M. N., & Boehm, A. B. (2017). Effects of submerged zone, media aging, and antecedent dry period on the performance of biochar-amended biofilters in removing fecal indicators and nutrients from natural stormwater. Ecological Engineering, 102, 320-330. http://doi.org/10.1016/j.ecoleng.2017.02.053 |
Related Publication | Afrooz, A. R. M. N., Pitol, A. K., Kitt, D., & Boehm, A. B. (2018). Role of microbial cell properties on bacterial pathogen and coliphage removal in biochar-modified stormwater biofilters. Environmental Science-Water Research & Technology, 4(12), 2160-2169. http://doi.org/10.1039/c8ew00297e |
Location | https://purl.stanford.edu/sg397sh4802 |
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- This work is licensed under an Open Data Commons Attribution License v1.0.
Preferred citation
- Preferred Citation
- Boehm, Alexandria and Torkelson, Andrew and McCray, John and Nelson, Kara and Afrooz, Nabiul and Maxwell, Reed and Mohanty, Sanjay. (2017). N3.02 Afrooz 2017 ReNUWIt Annual Meeting Poster. Stanford Digital Repository. Available at: https://purl.stanford.edu/sg397sh4802
Collection
Re-inventing the Nation's Urban Water Infrastructure (ReNUWIt)
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- aboehm@stanford.edu
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