May. 1, 2007 - Oct. 1, 2008Funding Agency
Center for Produce SafetyAmount Awarded
Xiuping Jiang, Ph.D.
Zehnder, G. and Luo, F.Summary
This study examines the effectiveness of composting for inactivating pathogens in manure, given that raw or inadequately composted animal waste applied to growing fields is a potential pre-harvest source of produce contamination. The primary mechanism for pathogen inactivation during outdoor composting is microorganism-related heat generation. In practice, the effectiveness of pathogen inactivation varies with environmental factors, including temperature, rainfall, nutrient sources, compost ingredients, and pathogens induced heat resistance.