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Impact of ventilation on ammonia and odour emissions from pig housing

(2020)
Author
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(UGent) , (UGent) and Peter Demeyer
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Project
Abstract
In order to comply with EU and regional regulations, the Flemish pig production sector requires validated and cost-effective emission reduction techniques for ammonia and odour. Two-thirds of newly built fattening pig houses in Flanders have underfloor air distribution (UFAD) systems and pose the risk of pit air displacement resulting in increased emissions. Therefore, this PhD was focussed on ventilation-based techniques and aimed to understand the ammonia and odour transport behaviour at different ventilation control settings (VCS) in these buildings. The hypothesis is that air velocity, turbulence and temperature conditions at urine/faeces surfaces on pen floors and in slurry pits are closely linked to ventilation rate. To achieve the objectives, a novel research approach was developed, thereby integrating both mathematical and physical modelling with field measurements. The modelling methodologies included the development of a mathematical indoor climate model, physical test platform (TP) compartments and a Computational Fluid Dynamics (CFD) model. The applied methodology enabled to gain detailed knowledge about the pollutants transport behaviour from the emitting sources in the pig building and to assess emission reduction potential of different VCSs and design techniques. Field experiments confirmed that increasing the set-point temperature at the climate controller by +2 °C compared to reference (CON) setting, significantly reduced the odour emission by 34% compared to the CON. Based on the VERA protocol, it was feasible to reduce the annual NH3 emission by 11% compared to CON using this VCS. Furthermore, the TP compartments and the validated CFD model can be used as modelling tools to evaluate emission mitigation techniques in buildings equipped with UFAD system without performing expensive animal experiments.
Keywords
Ventilation, Pig Housing, Ammonia, Odour, Emissions, Modelling, Ventilation Control Settings

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Please use this url to cite or link to this publication:

MLA
Tabase, Raphael Kubeba. Impact of Ventilation on Ammonia and Odour Emissions from Pig Housing. Universiteit Gent. Faculteit Bio-ingenieurswetenschappen, 2020.
APA
Tabase, R. K. (2020). Impact of ventilation on ammonia and odour emissions from pig housing. Universiteit Gent. Faculteit Bio-ingenieurswetenschappen.
Chicago author-date
Tabase, Raphael Kubeba. 2020. “Impact of Ventilation on Ammonia and Odour Emissions from Pig Housing.” Universiteit Gent. Faculteit Bio-ingenieurswetenschappen.
Chicago author-date (all authors)
Tabase, Raphael Kubeba. 2020. “Impact of Ventilation on Ammonia and Odour Emissions from Pig Housing.” Universiteit Gent. Faculteit Bio-ingenieurswetenschappen.
Vancouver
1.
Tabase RK. Impact of ventilation on ammonia and odour emissions from pig housing. Universiteit Gent. Faculteit Bio-ingenieurswetenschappen; 2020.
IEEE
[1]
R. K. Tabase, “Impact of ventilation on ammonia and odour emissions from pig housing,” Universiteit Gent. Faculteit Bio-ingenieurswetenschappen, 2020.
@phdthesis{8660822,
  abstract     = {In order to comply with EU and regional regulations, the Flemish pig production sector requires validated and cost-effective emission reduction techniques for ammonia and odour. Two-thirds of newly built fattening pig houses in Flanders have underfloor air distribution (UFAD) systems and pose the risk of pit air displacement resulting in increased emissions. Therefore, this PhD was focussed on ventilation-based techniques and aimed to understand the ammonia and odour transport behaviour at different ventilation control settings (VCS) in these buildings. The hypothesis is that air velocity, turbulence and temperature conditions at urine/faeces surfaces on pen floors and in slurry pits are closely linked to ventilation rate. To achieve the objectives, a novel research approach was developed, thereby integrating both mathematical and physical modelling with field measurements. The modelling methodologies included the development of a mathematical indoor climate model, physical test platform (TP) compartments and a Computational Fluid Dynamics (CFD) model. The applied methodology enabled to gain detailed knowledge about the pollutants transport behaviour from the emitting sources in the pig building and to assess emission reduction potential of different VCSs and design techniques. Field experiments confirmed that increasing the set-point temperature at the climate controller by +2 °C compared to reference (CON) setting, significantly reduced the odour emission by 34% compared to the CON. Based on the VERA protocol, it was feasible to reduce the annual NH3 emission by 11% compared to CON using this VCS. Furthermore, the TP compartments and the validated CFD model can be used as modelling tools to evaluate emission mitigation techniques in buildings equipped with UFAD system without performing expensive animal experiments.},
  author       = {Tabase, Raphael Kubeba},
  isbn         = {9789463573108},
  keywords     = {Ventilation,Pig Housing,Ammonia,Odour,Emissions,Modelling,Ventilation Control Settings},
  language     = {eng},
  pages        = {XII, 228},
  publisher    = {Universiteit Gent. Faculteit Bio-ingenieurswetenschappen},
  school       = {Ghent University},
  title        = {Impact of ventilation on ammonia and odour emissions from pig housing},
  year         = {2020},
}