The liquid test plant station was modernized in 1998/1999 with help of subsidies of the EU. It was equipped with utilities for warm water, destilled water, air pressure, draining of sewage, a cooling chamber and an air-conditioned emission measuring laboratory.
The following test equipments exists:
- Pump and pipe testing rig (figure on the left),
- In the material laboratory (figure centre) are measured physical material properties e.g. viscosity, density, dry matter content, conductivity, pH value and the most important milk ingredients as fat, protein, lactose, total solid content (Milcoscan S 54) and the number of somatic cells (Fossomatic 360).
- Herringbone experimental milking parlour (figure on the right) is equipped with different milking units (Westfalia, Happel, De Laval, Fullwood, Intec, SAC) and these are tested with help of a multiple pressure measuring facility (Bovi Press) and a new multiple force component measuring unit (
 DLG Test Centre Potsdam).
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The emission lab (figure on the left) is used to determine gaseous emissions (ammonia, methane, nitrous oxide, hydrosulphide and others) from organic fertilizers, organic wastes and similar substrates. To investigate the emission as well as the storage behaviour of this substrates vessels with a volume of 0.1 m³ are available.
Gas concentrations are determined with a photoacoustic multigas monitor (NDIR).
Odour samples are examined at an olfactometer with at least four panelists (figure on the right).
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Scale models of ventilation engineering allow to investigate the air flow through animal houses and related emissions. In the model of a pig house (scale 1 : 20, figure on the left) the slurry beneath the slatted floor is simulated with aqueous ammonia solution.
With special fans and measuring orifices (figure on the right) it is possible to adjust the air flow through the model of an animal house with high accuracy.
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 The wind tunnel of the ATB is used to investigate the dispersion of substances in the atmospheric boundary layer. With modern measurement devices can be realize the setting of a real wind profile, which exists in natural surrounding. Furthermore it is possible to determine the concentration fields and the visualization through pictures of fume by the laser-light-sheet technique.
Other investigation sectors are the determination of pressures at buildings and the determination of exchange rate in stable models of livestock buildings with natural ventilation.
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| Emission data are necessary for the evaluation of systems in the keeping systems, manure removal system and ventilation systems of animal houses. Furthermore represent these values the basis of the forecast of immissions. In practice the concentration of gases are detected by a muli gas monitor. The determination of odours is realized by the olfactometer (odours, laboratory of emissions).
The air volume flows are determined by measuring fans, by air velocity anemometers and by means of balance methods. A special tracer gas method, using the radioactive gas Krypton 85, is developed at the ATB. Up to 40 sensors (area counting tubes, see figure on the left) can measure simultaneously with a frequency of 1 Hz counting rate (the counting rate is proportional to the Krypton 85 concentration). Especially for stables with natural ventilation this method offers the realization of high air exchange rates (up to 1000 h-1). In addition to the emission measurements, an immission measuring device for ammonia (see figure on the right) enabled us to determine at the same to investigate the dispersion of ammonia in the surrounding.
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