The development of the odour threshold test for environmental odour assessment
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Date
2015-04-01
Authors
Ros Nadiah Rosli
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Abstract
Odour emissions can cause serious annoyance in the neigbourhood of the emission
source. In Malaysia, the Olfactometer is used to measure the odour emission which
reports odour concentration value. The Olfactometer is very expensive and requires
professional odour operator to conduct the equipment. Therefore, this research was
conducted to develop on alternative odour measurement method using the Triangular
Odour Bag concept. The uniqueness of this study was the design of an illustrated odour
wheel and the pleasantness scales as additional odour assessment parameter. During
odour sampling and measurement, several variables that might give changes to odour
concentration value have been detected. The variables (size of panels, number of reused
odour bag and storage time of the sampling bag) were screened in order to check their
significance by conducting experiments using factorial design. The results show that out
of the three variables, only the number of reused odour bag and storage time of the
sampling bag significantly influence odour concentration. At the end of the study, a
decision tree for sampling and odour measurement was suggested for laboratory odour
measurement analysis. The decision tree developed from this study enables the
identification of the suitable odour assessment procedure and equipments to a site’s
condition.