Comparative odour measurements according to EN 13725 using pig house odour and n-butanol reference gas

Hove, Nathalie; Langenhove, Herman Van; Weyenberg, Stéphanie Van; Demeyer, Peter

doi:10.1016/j.biosystemseng.2016.01.002

Cited by 11 publications

(3 citation statements)

References 33 publications

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“…The is due to the complex biochemical and neurological working principle of the human sensory system, which is highly individual, making human olfaction highly subjective. Objectification measures have been established and standardized over the last decades (EN 13725, 2022), but have considerable uncertainties due to imperfect comparability models (Boeker and Haas, 2007;Hove et al, 2016). Sensor systems for odor measurement must therefore be carefully limited to well-studied contexts, traced back to applicable human sensory reference methods and not be carelessly marketed as universally applicable electronic noses (Boeker, 2014).…”

Section: Data Analysis and Representationmentioning

confidence: 99%

Promoting quality in low-cost gas sensor devices for real-world applications

Reimringer,

Bur

2023

Front. Sens.

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Recent advancements in metal oxide semiconductor sensors enable system integrators to make sensor devices without the traditional complications of operating barebone sensor components. Anyone, so it seems, can put together multi-sensor-systems by combining an integrated sensor subsystem with a small piece of digital infrastructure, resulting in low-cost sensor systems or sensor networks for all kinds of applications. With low energy consumption, the deployment of close meshed sensor networks is becoming a reality, promising high density data for big data models. However, data quality is not necessarily a feature of such devices, since the device output signals are heavily processed and the insight into the actual operating technique is black-boxed by the respective sensor manufacturer. High volume production of a sensor model requires widely applicable output information, yet this mainstreaming negatively impacts quality control efforts on the system level as well as niche applications that require specialized operation modes. This article exemplarily examines the measurement chain of typical metal oxide semiconductor sensor applications and deduces requirements for a technically sound advancement of the subject for research and commercial purposes. Equivalent considerations can be made for any low-cost sensor principle and their respective challenges. The conclusion urges all stakeholders participating in the development and marketing of sensor devices to advance a scientifically valid state of knowledge and to educate their customers and even the general public accordingly.

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Section: Data Analysis and Representationmentioning

confidence: 99%

Promoting quality in low-cost gas sensor devices for real-world applications

Reimringer,

Bur

2023

Front. Sens.

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“…Odor-producing compounds like ammonia, aliphatic amines, hydrogen sulfide, carbon disulfide, mercaptans, BTEX, chlorobenzenes and chloroform originate from various activities like waste management plants, industrial production, and animal production facilities [2]. Odor from pig styes or pig production is a severe problem that causes substantial nuisance to neighbors and prevents the farmers from developing production [3], [4]. Ammonia emissions from intensive pig production are a major public concern due to their potential effects as a public nuisance [5].…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact Evaluation of Odor Dispersion Emitted From Pig Farms: A Case Study From Alban, Cundinamarca, Colombia

ROMERO-TOVAR

GRANDA-RODRIGUEZ

LUQUE-VILLA

2022

WIT Transactions on Ecology and the Environment

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The purpose of this research was to determinate the environmental impacts generated by the offensive odors coming from pig farming in the Alban municipality, located in Cundinamarca, Colombia. The main objective was to propose guidelines for the elaboration of a Plan for Offensive Odor Impact Reduction for the pig farms of the municipality. Initially an environmental impact evaluation was carried out. Then the application of the protocols established in Colombian regulations: NTC 6012-1 and Resolution 1543 of 2013 of the Ministry of Environment and Sustainable Development (MADS) resulted in a relevant impact on the air quality. This was ratified in the developed psychometric analysis that allowed us to identify a particular nuisance of offensive odors in the village of Pantanillo within the sector located on the right side of the road that communicates Albán and Guayabal de Siquima, taking into account that among the results obtained within the psychometric analysis the perception by odor level showed values between "Strong" (35.0%) and "Very strong", (20.0%) for the possible affected zone, while in the control area C, 72% considered it "very faint" and "no odor", finally proposing guidelines for the development of a program of reduction of offensive odors that fits the type of population existing in the study area and allow a reduction in the discomfort by offensive odors.

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“…Especially, proficiency testing has played a major role in establishing and validating standards for olfactometry to attain defined levels of statistical performance parameters such as precision under repeatability conditions and accuracy (Maxeiner 2006 ; Van Harreveld et al 2009 ). Most of the publications, however, focus solely on uncertainties caused by the analytical process, such as variabilities among individual panelists, inter-panel variability, within-panel variability, and inter-laboratory variability (Clanton et al 1999 ; Hove et al 2016 ; McGinley and McGinley 2006 ). Accuracy is also an important contributor to uncertainty, which in essence cannot be measured for real samples.…”

Section: Introductionmentioning

confidence: 99%

Scents in the stack: olfactometric proficiency testing with an emission simulation apparatus

Stöckel

Cordes

Stoffels

et al. 2018

Environ Sci Pollut Res

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Olfactometry is globally acknowledged as a technique to determine odor concentrations, which are used to characterize odors for regulatory purposes, e.g., to protect the general public against harmful effects of air pollution. Although the determination procedure for odor concentrations is standardized in some countries, continued research is required to understand uncertainties of odor monitoring and prediction. In this respect, the present paper strives to provide answers of paramount importance in olfactometry. To do so, a wealth of measurement data originating from six large-scale olfactometric stack emission proficiency tests conducted from 2015 to 2017 was retrospectively analyzed. The tests were hosted at a unique emission simulation apparatus—a replica of an industry chimney with 23 m in height—so that for the first time, conventional proficiency testing (no sampling) with real measurements (no reference concentrations) was combined. Surprisingly, highly variable recovery rates of the odorants were observed—no matter, which of the very different odorants was analyzed. Extended measurement uncertainties with roughly 30–300% up to 20–520% around a single olfactometric measurement value were calculated, which are way beyond the 95% confidence interval given by the widely used standard EN 13725 (45–220%) for assessment and control of odor emissions. Also, no evidence has been found that mixtures of odorants could be determined more precisely than single-component odorants. This is an important argument in the intensely discussed topic, whether n-butanol as current reference substance in olfactometry should be replaced by multi-component odorants. However, based on our data, resorting to an alternative reference substance will not solve the inherent problem of high uncertainty levels in dynamic olfactometry. Finally, robust statistics allowed to calculate reliable odor thresholds, which are an important prerequisite to convert mass concentrations to odor concentrations and vice versa.

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Comparative odour measurements according to EN 13725 using pig house odour and n-butanol reference gas

Cited by 11 publications

References 33 publications

Promoting quality in low-cost gas sensor devices for real-world applications

Promoting quality in low-cost gas sensor devices for real-world applications

Environmental Impact Evaluation of Odor Dispersion Emitted From Pig Farms: A Case Study From Alban, Cundinamarca, Colombia

Scents in the stack: olfactometric proficiency testing with an emission simulation apparatus

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