The Manure Management TWG focused on managing the GHG emissions, including nitrogen, from manure management for agricultural uses, including the storage of manure. This TWG produced two reports, one focused on solid-liquid separation (SLS) of manure and another focused on acidification of manure.

The SLS technical guidance outlines the primary drivers of emissions from manure management and the methods used for reporting those emissions. It also discusses the principles behind emissions reductions during the various stages of the SLS process - upstream, during, and downstream, and explains the individual factors contributing to emissions – environmental, technical, and management.

The acidification report assesses the current science on manure acidification as a GHG emissions mitigation practice and concludes that the practice can reduce both CH4 and NH3 emissions from manure storage. The reductions are dependent on pH and time, temperature, and fresh additions of manure are important factors.

Summary

TWG MEMBERS

• Rebecca Larson (chair), University of Wisconsin-Madison

• Horacio Aguirre-Villegas, University of Wisconsin-Madison

• Mahmoud Sharara, North Carolina State University

• Meredith Niles, University of Vermont

• Deanne Meyer, UC Davis

• Swati Hegde, World Resources Institute

RESEARCH ASSISTANT

• Edward Boswell, Teaching Faculty, University of Wisconsin