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© Thünen-Institut
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Institute of

AT Agricultural Technology

Environmental Technology – Livestock husbandry

The livestock in Germany represents an important economic factor with an animal population of 12.7 million cattle, 28.1 million pigs, 39.6 million laying hens and more than 60 million broilers. It is the basis for the production of high quality and low-priced foods.

But livestock is also connected with considerable environmental impacts which contribute to air pollution (odors, particulate matter, bioaerosols, ammonia) on the one hand, but also to pressures of soils and seas (eutrophication, acidification, changes in biotypes and plant populations) and ground waters as well (nitrate accumulation). Odors appear to be pestering, especially in the near range of animal facilities. Particulate matter and bio aerosols may endanger the human health by affections of the respiratory tract and allergies. Ammonia contributes to over-fertilization of nitrogen limited biotypes (moors, neglected grasslands, forests, Flora-Fauna habitats) and to acidification of seas and soils. In the frame of European conventions for air pollution control Germany has committed to continue reducing the national ammonia emission caused by animal husbandry which contributes 90 % of it. The social acceptance of livestock has decreased in the recent years on a variety of grounds. Besides the named issues the intensive livestock is felt not to be appropriate to species on the one hand and responsible for the spread of multi-resistant microorganisms. The research and development work of the Institute of Agricultural Technology is focused on the wide reduction of the environmental impacts caused by livestock, but taking economic frame conditions into account. Focal points are the measurement of gaseous and particulate emissions, especially bioaerosols, the emission reduction by improving the constructional and technical livestock conditions and the management as well as the development and assessment of emission reduction by exhaust air treatment technologies.

Exhaust air treatment

The exhaust air treatment is a working area which develops and evaluates technologies for an efficient separation of particulate matter, bio aerosols, ammonia and odors from livestock facilities. Operating safety and reliability, the use of residuals and cost reduction options are investigated in addition.

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Exhaust air treatment

Characterisation of gases, dust and bio-aerosols

High concentrations of gases, dust and bio-aerosols in stables stress the animals and when emitted also the environment. We measure and characterize these air pollutants to identify potentials for theirs reduction. We also develop new methods for this purpose.

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Characterisation of gases, dust and bio-aerosols

Computational fluid dynamics (CFD)

With computational fluid dynamics information about physical values such as pressure, turbulence intensity and velocity can be specified and visualized in a virtual calculation room.

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Computational fluid dynamics (CFD)

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