The Manure Management TWG focused on the management of greenhouse gas (GHG) emissions from manure storage and produced two reports, Manure Acidification and Climate Outcomes: Literature Review and Technical Guidance and Solid-Liquid Separation of Manure and Climate Outcomes: Technical Guidance.

The solid liquid separation (SLS) technical guidance outlines the primary drivers of emissions from manure management and the methods used to quantify them. It explains how emissions can be reduced through the stages of the SLS process, before, during, and after separation, and describes how environmental conditions, technology design, and management practices influence overall emissions.

The acidification report summarizes the current science regarding manure acidification and its role in reducing GHG emissions. It concludes that this practice can reduce both methane (CH4) and ammonia (NH3) emissions from manure storage, with the extent of reduction influenced by the pH of acidified manure, the timing of acid additions, temperature, and the frequency of fresh manure inputs.

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 Assistants:

  • Edward Boswell, Teaching Faculty, University of Wisconsin

NETWORK REPORTS

• Manure Acidification and Climate Outcomes: Literature Review and Technical Guidance

• Solid-Liquid Separation of Manure and Climate Outcomes: Literature Review

• Solid-Liquid Separation of Manure and Climate Outcomes: Technical Guidance

NETWORK BRIEFS