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Defining risk-based odour buffer zones for Darwin region wastewater treatment facilities using odour dispersion modelling and field olfactometry

Mousellis, Themelis (2017). Defining risk-based odour buffer zones for Darwin region wastewater treatment facilities using odour dispersion modelling and field olfactometry. Bachelor of Engineering (4th Year Project) Thesis, Charles Darwin University.

Document type: Thesis
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Author Mousellis, Themelis
Title Defining risk-based odour buffer zones for Darwin region wastewater treatment facilities using odour dispersion modelling and field olfactometry
Institution Charles Darwin University
Publication Date 2017
Thesis Type Bachelor of Engineering (4th Year Project)
Supervisor Fairfield, Charlie A.
Lilley, David M.
Tsoukalis, Skefos
Subjects ENGINEERING
0905 - Civil Engineering
Abstract The concentration of sewage at wastewater treatment sites, as well as the retention and treatment thereof, in facultative and maturation ponds leads to the emission of odorants. Although odour emissions from wastewater sources do not generally cause direct health-related problems, a preliminary study of the existing literature has found that, because odour elicits a physiological response it can cause psychological stress. Furthermore, current legislation defines odours that adversely affect the amenity of an area as environmental nuisance.

There is currently a buffer zone around each of the major wastewater treatment sites in the Darwin region. These buffer zones exist to limit development adjacent to wastewater infrastructure sites to reduce the likelihood of odour complaints. Due to the number, and distribution, of recent complaints from residents living near wastewater treatment sites, but outside the buffer zone, it is unclear whether, or not, the extent of current buffer zones is sufficient to minimise the exposure of the surrounding community to odour.

The purpose of this thesis is to determine the suitability of current odour buffer zones surrounding wastewater infrastructure in the Darwin region. A combination of three different odour assessment techniques will be used to achieve this. These techniques are: odour dispersion modelling, field olfactometry, and odour complaint mapping.

Odour dispersion modelling involved entering meteorological, emission, and terrain data for each site into an odour dispersion model. This was done to develop a probabilistic odour impact assessment of odorants emanating from a defined source.
Field olfactometry was undertaken to ground-truth the dispersion model while gaining an empirical understanding of how odour from wastewater treatment sites is affecting the surrounding residents (and generating complaints).
Odour complaint mapping is an on-going process involving mapping the location of complaints regarding odour. It was initially used to help to select appropriate testing locations for field olfactometry by examining clusters of complaints.
Additional Notes Thesis contains culturally or commercially sensitive content that requires indefinite restricted access.
 
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Created: Mon, 27 Nov 2017, 08:56:20 CST by Jessie Ng