Summary of Awards to Date

Defining parameters to eliminate pathogens in composted animal manures for application to produce fields.

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Sep. 1, 2007 - Aug. 31, 2010

Award Number


Funding Agency

Center for Produce Safety

Amount Awarded



Marilyn Erickson, Ph.D.
University of Georgia


Jiang, X., and Doyle, M.


This project will focus on the relative contribution of non-thermal factors (pH, ammonia, organic acids, light, and moisture) to inactivation of pathogens in animal manure-based compost mixtures. To address these factors, inactivation of pathogens (Escherichia coli O157:H7 and Salmonella spp.) will be monitored in response to manure type, carbon feedstock, carbon:nitrogen ratio, moisture, and sunlight using compost bioreactors, compost trays housed in environmental chambers, and static compost piles in the field. Data collected will assist in the development of expanded guidelines for compost operations where manure is used as an ingredient.