Rapid size-specific changes in the drift of Baetis bicaudatus (Ephemeroptera) caused by alterations in fish odour concentration

Oecologia ◽  
1999 ◽  
Vol 118 (2) ◽  
pp. 256-264 ◽  
Author(s):  
Angus R. McIntosh ◽  
Barbara L. Peckarsky ◽  
Brad W. Taylor
Keyword(s):  
Baetis Bicaudatus ◽  
Odour Concentration

Identification of Taste and Odour Compounds from Western Lake Ontario

1984 ◽  
Vol 19 (1) ◽  
pp. 111-118 ◽  
Author(s):  
B.G. Brownlee ◽  
D.S. Painter ◽  
R.J. Boone
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Elemental Sulfur ◽  
Lake Ontario ◽  
Direct Link ◽  
Municipal Water Supply ◽  
Municipal Water ◽  
Western Lake ◽  
Odour Concentration

Abstract During August, 1983 geosmin was identified in a municipal water supply drawn from western Lake Ontario. The geosmin concentrations were 0.01-0.07 μg L-1, within the range for threshold odour concentration of 0.01-0.2 μg L-1. 2-Methylisoborneol was not detected. The odour 'event' coincided with a dieoff of Cladophora in the lake, but we were not able to establish a direct link between the dieoff and geosmin production. Decomposing Cladophora in shoreline areas produced a strong odour in the air. 3-Methylindole, elemental sulfur, dimethyl tetrasulfide, and dimethyl pentasulfide were tentatively identified in water samples collected from these areas, but geosmin and 2-methylisoborneol were not detected.

Olfactometric characterisation of sludge odours

2000 ◽  
Vol 41 (6) ◽  
pp. 49-55 ◽  
Author(s):  
S. D. Lambert ◽  
A. L. Beaman ◽  
P. Winter
Keyword(s):  
Recent Work ◽  
Sewage Treatment ◽  
Limited Information ◽  
Hedonic Tone ◽  
Detection Thresholds ◽  
Remediation Measures ◽  
Odour Concentration ◽  
Odour Profile ◽  
Storage Facilities

Conventional olfactometric techniques have been used to evaluate odours from sewage treatment and sludge storage facilities primarily in terms of odour concentration relative to their detection thresholds. However, such data conveys limited information that would be useful for determining the causes of most odours or the most appropriate remediation measures to be taken. Thispaper discusses some recent work undertaken to characterise the olfactometric profiles of different odours. Standard descriptive terms were used to characterise odours at normalised, moderately strong concentrations. These were used directly for the calculation of hedonic tone. They were also collated into a small number of generic odour groups and plotted to allow visual comparisons of different odour profile fingerprints. Such odour characterisations have proved to be very useful and may easily be incorporated into normal olfactometric evaluations.

scholarly journals Influence of the variability of the odour emission rate on its impact range: a case study of the selected industrial source

2019 ◽  
Vol 100 ◽  
pp. 00070 ◽  
Author(s):  
Elżbieta Romanik ◽  
Yaroslav Bezyk ◽  
Marcin Pawnuk ◽  
Urszula Miller ◽  
Agnieszka Grzelka
Keyword(s):  
Emission Rate ◽  
Dispersion Model ◽  
Grid Size ◽  
Model Calculations ◽  
Gas Treatment ◽  
Industrial Source ◽  
Odour Concentration ◽  
Made In ◽  
Dynamic Olfactometry

Odour concentration measurements in a chosen industrial source were made in this study using the method of dynamic olfactometry. The two different scenarios considered the variation of the odour emission rate as input for the dispersion model were compared for the period 2017 (before installation of the equipment for gas treatment) and 2018 (after implementation of purifying technologies). In this paper the odour impact range was determined by applying model calculations conducted in the Polish reference dispersion model – OPERAT FB software for the grid size 2 x 2 km. The conducted research shows a significant improvement in the odour impact range of chosen industrial source in year 2018 compared to 2017.

Odour Intensity Assessment at Different Area of a Palm Oil Mill Using Olfactometry Method

2015 ◽  
Vol 802 ◽  
pp. 472-477 ◽  
Author(s):  
Nurashikin Yaacof ◽  
Nastaien Qamaruz Zaman ◽  
Yusri Yusop
Keyword(s):  
Palm Oil ◽  
Emission Rate ◽  
Anaerobic Treatment ◽  
Cooling Pond ◽  
Intensity Assessment ◽  
Offensive Odour ◽  
Volatile Organic ◽  
Odour Concentration ◽  
Volatile Organic Acids ◽  
Palm Oil Mill

Malaysia is one of the world’s largest palm oil exporters, amounting to 39 % of world palm oil production and 44 % of world exports [1]. Palm oil mill usually engaged with odour problem that came from the wastewater treatment pond that released odourous compounds such as ammonia, volatile organic acids, and sulfides. This study was done to investigate odour nuisance from palm oil mill operations and odour emission rate at United Oil Palm (UOP) Mill, Nibong Tebal, Penang, Malaysia. Odour assessment was done on-site at four points and odour sample was taken from four anaerobic treatment ponds. Flux hood method was used and the samples were analysed by using the olfactometry method with six panels. It was found that in the UOP mill, the highest odour emission is from the anaerobic pond 2 with the average specific odour emission rate of 10.88 OUE/sm2, follow by cooling pond, acid pond and anaerobic pond 1. Besides knowing the main source of the odour, this study was run to find the intensity and offensiveness of the palm oil mill odour. A simple questionnaire was asked to the six panels about the odour intensity and odour offensiveness, and the average for both was at 5 (very strong odour) and 3 (definitely offensive odour). Higher level of offensiveness and intensity will increase the odour complaints, but by knowing those levels, it will help in deciding the limit of odour concentration that can be released and the threshold of odour that can be accepted by humans.

Research on Odours Emitted from Non-Hazardous Waste Landfill Using Dynamic Olfactometry

2017 ◽  
Author(s):  
Marija Meišutovic-Akhtarieva ◽  
Eglė Marčiulaitienė
Keyword(s):  
Hazardous Waste ◽  
Outdoor Air ◽  
Waste Landfill ◽  
Odour Source ◽  
Air Temperatures ◽  
Volatile Organic ◽  
Odour Concentration ◽  
Odour Emissions ◽  
Hazardous Waste Landfill ◽  
Dynamic Olfactometry

The article analyses the existing research on odour emissions from the passive odour source – municipal landfill for non-hazardous waste. The current research has been carried out in the Vilnius county, at the Kazokiškės landfill for regional municipal waste. Odour emissions were analysed using samples from waste of different age and at different outdoor air temperatures. The investigation determined the concentration of odourous volatile organic compounds (VOCs) formed in the landfill (mg/m3) and odour emissions (OUe/m2s). The odour concentration varied between 0.02 OUe/m2s (from 9 year old waste at 11oC) to 1.29 OUe/m2s (from 0–3 year old waste at minus 1 oC and minus 10 oC). It was determined that as temperature decreases (within the range of 11 to minus 10 oC), the concentration of odour emissions increases. The coefficient of correlation between the temperature of environment and the concentration of odours emitted from the landfill stood at minus 0.91.

Odour emission rates from manure treatment/storage systems

2001 ◽  
Vol 44 (9) ◽  
pp. 269-275 ◽  
Author(s):  
I. Edeogu ◽  
J. Feddes ◽  
R. Coleman ◽  
J. Leonard
Keyword(s):  
Storage Tank ◽  
Control Treatment ◽  
Pig Manure ◽  
Emission Rates ◽  
Storage Tanks ◽  
Treatment Control ◽  
The Third ◽  
Manure Treatment ◽  
Manure Storage ◽  
Odour Concentration

The effects of agitation, liquid-only manure, depth and time on odour emission rates were investigated. Manure storage tanks were filled to incremental depths every two weeks. At each depth odour samples were collected twice. The second sample was collected seven days after the first. Odour concentration was measured with an olfactometer. Three different pig-manure treatments were investigated. In one treatment, slurry manure in a storage tank was agitated before and during odour sampling. In a second treatment, the settlable solids in manure were removed gravimetrically over 24 hours and liquid manure was pumped to a storage tank. In the third treatment (control), odour samples were collected from unseparated and undisturbed slurry manure. Overall, the odour emission rates in the agitated manure treatment ranged between 0.39 and 1.02 ou s−1 m−2, increased with depth and decreased with time, i.e. after seven days at each depth. In the liquid-only manure treatment, the emission rates ranged between 0.09 and 0.69 ou s−1 m−2, increased with depth but the effect of time was not evident. In the control treatment, the emission rates ranged between 0.20 and 0.66 ou s−1 m−2 and increased with depth on the first odour sampling day but decreased with depth on the second sampling day.

Interlaboratory comparison of dynamic olfactometry in Central Europe 2000

2001 ◽  
Vol 44 (9) ◽  
pp. 27-32 ◽  
Author(s):  
D. Mannebeck ◽  
H. Mannebeck
Keyword(s):  
Central Europe ◽  
Hydrogen Sulphide ◽  
Interlaboratory Comparison ◽  
European Standard ◽  
Mean Values ◽  
Repeatability And Reproducibility ◽  
Odour Concentration ◽  
Standard Deviations ◽  
Dynamic Olfactometry

This paper presents the results of an interlaboratory comparison (ringtest) on olfactometry with 31 participants from four countries in Central Europe. The aim was to give evidence of the performance of dynamic olfactometry on the basis of the European Standard prEN 13725 (Draft) “Determination of odour concentration with dynamic olfactometry”. The test included the analysis of three individual substances (n-butanol, hydrogen sulphide, tetrahydrothiophen) as well as a natural odour mixture (coffee flavour) to compare mean values and the standard deviations of results for the investigated samples. It was confirmed that laboratories working in compliance with the requirements of the new standard achieve a significantly better repeatability and reproducibility than those that are not compliant.

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