This study aims to meet the demand for scientifically justified guidelines for the assessment and reduction of odour annoyance. The study includes the determination of the odour load from different livestock farming units and investigations into feasible odour reducing technologies. Ultimately the project aims to elaborate on lines for placement of large production units.

To determine the dose response relationship for odour annoyance of pig and poultry, odour measurements were taken at two pig farms of different sizes and two broiler production units. The investigations included olfactometric emission measurements in three seasons, dispersion calculations and population surveys in the surroundings. Emissions factor data for pig and broiler production was established for future odour impact assessments.

The project also focused on identifying simple and robust measures to diminish the odour load from agricultural sources. The study showed the contribution of slurry storage on the total odour load and specified the benefits of covering manure tanks. A decent reduction in the odour load is achievable by simple floating covers. Further odour reduction measures include peat amendment in manure and the optimisation of the ventilation rate in sheds.