EVS: Emissionsversuchsstall - Experimental dairy housing for quantifying methane and ammonia emission abatement strategies under entire herd conditions

Scientist Empa: MSc chemistry (FH) Kerstin Zeyer

Collaboration with Dr. S. Schrade (Agroscope), Dr. Frigga Dohme-Meier (Agroscope Posieux), Prof. M. Kreuzer (ETHZ)

 

In 2015, an experimental dairy housing was established at Agroscope in Tänikon, Switzerland. The modular design and the flexible floor elements in the dairy housing allow structural and process engineering and organisational abatement measures to be varied and validated effectively. The two spatial separated housing compartments enable comparative measurement conditions (e.g. climatic conditions) in practical scale. Thereby, the emission reduction potential of abatement measures can be quantified in relation to a reference system.

Within this FOEN and SNF NRP69 funded project, NH3 and GHG emissions from the housing are determined using a dual tracer ratio technique. Different tracer gases, sulphur hexafluoride (SF6) and trifluoromethyl sulphur pentafluoride (SF5CF3), are applied for each experimental compartment, to trace cross-contamination. Composite air samples from both compartments are collected and analysed in real-time for target substance (NH3 and GHGs, CRDS and QCLAS) and tracer gas mole fractions (GC-ECD). Thereby mass flow emissions for NH3 and GHGs from both compartments with natural ventilation can be determined separately.
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