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ARS Home » Midwest Area » Bowling Green, Kentucky » Food Animal Environmental Systems Research » Research » Publications at this Location » Publication #364486

Research Project: Developing Safe, Efficient and Environmentally Sound Management Practices for the Use of Animal Manure

Location: Food Animal Environmental Systems Research

Title: Bacterial transport through biochar-amended sand filters

item Bolster, Carl

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.