During my PhD studies, I researched the emissions of ammonia, methane and nitrous oxide from animal pig slurry and anaerobically digested slurry. I investigated if mechanical separation of slurry could be used as a mitigation technology. Measurements have been made during both slurry storage and field application. The separated fiber fraction can be pyrolyzed into biochar and subsequently be incorporated into the soil as a method for carbon sequestration. Addition of biochar to the different slurry fractions during field application, and to a fiber fraction during storage, was therefore included in the studies as well.

The new research findings contribute to the understanding of how separation affects emissions during both storage and field application.

The PhD study was completed at the Department of Biological and Chemical Engineering, Faculty of Technical Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Tuesday, 29 April 2025 at 13.00.
Place: Building 1427, Room 246 (M2), Fredrik Nielsens Vej 2, 8000 Aarhus C
Title of PhD thesis: Emissions of greenhouse gases and ammonia from storage and application of animal manure - Investigating the effect of slurry separation
Contact information: Anna Holm Støckler, e-mail: anna@bce.au.dk, tel.: +45 72 20 31 82
Members of the assessment committee:
Associate Professor Stefania Pindozzi, Department of Agricultural Sciences, University of Naples, Italy
Associate Professor David Fangueiro, Department of Natural Resources, Environment and Territory, University of Lisbon, Portugal
Associate Professor Thomas William Seviour, Department of Biological and Chemical Engineering, Aarhus University (chair)
Main supervisor: Professor Anders Feilberg, Department of Biological and Chemical Engineering, Aarhus University, Denmark
Co-supervisor:
Tenure track Researcher Johanna Maria Pedersen, Department of Biological and Chemical Engineering, Aarhus University, Denmark
Tenure track Researcher Jesper Nørlem Kamp, Department of Biological and Chemical Engineering, Aarhus University, Denmark
Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Technical Sciences/GSTS, Ny Munkegade 120, building 1521, 8000 Aarhus C.