Ulrike Wolf

On 31.07.2014, Ulrike Wolf successfully defended her doctoral thesis on "Emission of NH₃, N₂O and CO₂ following the application of differently treated digestates from biogas production" at TU Braunschweig.

The objectives of this thesis were to:

1. quantify and compare NH₃ emissions after field application of different animal manures and digestates (from animal manures and digested maize) and to determine the effect of mechanical substrate separation on NH₃ emission,
2. determine the effect of different fertilizer types (i.e. calcium nitrate, digestate from maize, digestate from maize with a nitrification inhibitor) on NH₃ and N₂O emission from a maize field and to evaluate the total greenhouse gas budget of these fertilization systems and
3. analyze the processes of denitrification and C mineralization following application of ¹³C and ¹⁵N labeled digestate from maize simulating different application techniques in the laboratory.