Location: Food Animal Environmental Systems Research
Title: Bacterial transport through biochar-amended sand filtersAuthor
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Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only Publication Acceptance Date: 7/31/2019 Publication Date: 11/12/2019 Citation: Bolster, C.H. 2019. Bacterial transport through biochar-amended sand filters. American Society of Agronomy Meetings. Paper No. 296-5. Interpretive Summary: Technical Abstract: The addition of biochar to sand and soil columns can enhance the retention of bacteria and thus may provide a management strategy for removing bacteria from tile-drainage waters. Research has shown that biochar properties including pyrolysis temperature, feedstock, particle size, and application rate; microbial surface properties; soil water content and texture; and presence of dissolved organic matter all contribute to microbial removal in biochar-amended sand and soil columns. In this study, the role of sand size as a factor in controlling microbial transport through biochar-amended sand columns is investigated. Laboratory column experiments were conducted by quantifying the transport behavior of two bacterial isolates (E. coli and Salmonella spp.) and polystyrene microspheres through 10-cm columns packed with clean sand of three different sizes (0.25, 0.71, 1.19mm) at four different biochar application rates (0, 5, 10, and 15% v/v). Sorption studies were also performed to help separate the role of sorption and physical straining on the retention of bacteria and microspheres within the columns. Results from this study further our understanding of bacterial transport through biochar-amended porous media. |
