Ryan M. Holzem
University of Wisconsin–Green Bay
11 Papers
20 Citations
Ryan M. Holzem is an academic researcher from University of Wisconsin–Green Bay. The author has contributed to research in topics: Biosolids & Denitrifying bacteria. The author has an hindex of 4, co-authored 11 publications. Previous affiliations of Ryan M. Holzem include Duke University.
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Papers
Effects of pharmaceutically active compounds on a mixed microbial community originating from a municipal wastewater treatment plant.
TL;DR: The growth and composition of microorganisms found in a municipal wastewater treatment plant were investigated in the presence of four pharmaceutically active compounds (PhACs) in batch reactors at varying organic loadings and it is suggested that PhACs may affect microbial growth especially under lower organic loading conditions.
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Determining the Ecological Impacts of Organic Contaminants in Biosolids Using a High-Throughput Colorimetric Denitrification Assay: A Case Study with Antimicrobial Agents
TL;DR: Increased sensitivity, low cost, and high-throughput adaptability make this method an attractive alternative for meeting the initial testing regulatory framework for the Federal Insecticide, Fungicide, and Rodenticide Act, and recommended for the Toxic Substances Control Act, in determining the ecotoxicity of biosolids-derived emerging contaminants.
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Impacts of organic carbon availability and recipient bacteria characteristics on the potential for TOL plasmid genetic bioaugmentation in soil slurries.
TL;DR: The effects of varying organic carbon substrates, initial recipient-to-donor cell density ratios, and mixtures of known recipient bacterial strains on the conjugation and function of a TOL plasmid were tested in sterile soil slurry batch reactors to suggest that genetic bioaugmentation may be improved by minimal altering of environmental conditions.
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Evaluating the impacts of triclosan on wastewater treatment performance during startup and acclimation.
TL;DR: Overall, the present study suggests inhibition of nitrogen removal during reactor startup, however, NH4+ removal fully rebounded after 63 days, suggesting acclimation of the associated microbial communities to TCS.
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Life-cycle Analysis of Advanced Manure Management Systems for a Wisconsin Confined Animal Feeding Operation (CAFO)
Ryan M. Holzem,John F. Katers +1 more
TL;DR: In this article, a life cycle analysis was performed for five commercially available advanced manure management systems based on how they would treat manure from a 3,500-cow dairy farm in Wisconsin, which was concerned with the drawbacks of hauling and not application limitations.
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