Achtung: hohPublica wurde am 18.11.2024 aktualisiert. Falls Sie auf Darstellungsfehler stoßen, löschen Sie bitte Ihren Browser-Cache (Strg + Umschalt + Entf). *** Attention: hohPublica was last updated on November 18, 2024. If you encounter display errors, please delete your browser cache (Ctrl + Shift + Del).

Agricultural Engineering Research - English edition

Permanent URI for this communityhttps://hohpublica.uni-hohenheim.de/handle/123456789/7124

Browse

Browsing Agricultural Engineering Research - English edition by Person "Brose, Gregor"

Type the first few letters and click on the Browse button
Now showing 1 - 2 of 2
  • Thumbnail Image
    Publication
    Dynamics of Odour Release from a Pig House - Part 1 : Methodological Realization with Olfactometry and an ?EURoeElectronic Nose?EUR?
    (2001) Brose, Gregor; Hartung, Eberhard
    Due to varying operating conditions, odour emissions from pig houses are subject to large fluctuations. The appropriate selection of representa- tive sampling times as well as the more realistic calculation and evalua- tion of odour levels in ambient air requires more precise knowledge about the dynamics of odour emissions. The investigation programme of the presented project comprises the measurement of seasonal (fattening period), daytime-related, and short- term (feeding) dynamic effects of odour release as well as the identifica- tion of potential factors which influence the amount of odour emission. Parallel to “classic” olfactometry, an “electronic nose” with a chemo- sensor array of ten metal oxide sensors is used. Initial results clearly show the potential of “electronic noses” for the measurement of dynamic fluctuations in gas composition, which also includes odorants. In the second part, evaluation methods adapted to the problem will be used to determine possible connections between the sensor signals of the “electronic nose” and the odour concentrations analyzed by means of olfactometry.
  • Thumbnail Image
    Publication
    Dynamics of Odour Release from a Pig Stall - Part 2 : Results of Parallel Measurements with Olfactometry and the ?EURoeElectronic Nose?EUR?
    (2002) Brose, Gregor; Hartung, Eberhard; Jungbluth, Thomas
    The heavily fluctuating operating conditions in pig husbandry due to cli- matic and biological changes (alterations of temperature and air flow ra- te between day and night as well as between summer and winter, increa- sing animal mass during the fattening process, etc.) exert a significant in- fluence on the amount of actual odour emission. The examination pro- gramme of the presented project comprised the measurement of seasonal (fattening course), daytime-related, and short-term (feeding) dynamic ef- fects of odour release, as well as the identification of potential factors which influence the amount of odour emitted. Parallel to “classic” olfac- tometry, an “electronic nose” with a chemosensor array of ten metal oxide sensors was employed. The largest odour emissions are measured on hot summer days, while the lowest emissions were determined on cold winter days. On the one hand, the sensor signals of the “electronic nose” exhibit considerable differences on days with large air flow rate alterati- ons. On the other hand, continuous measurement with the “electronic nose” allows changes in the gas- and odorant composition of the exhaust air during the feeding times to be shown. From the measurement results, recommendations for odour sampling, the consideration of seasonal odour emission fluctuations in odour spreading calculations, and the use of “electronic noses” for the evaluation of odour emissions have been derived.