Odour offensiveness of a mink farm
description
Transcript of Odour offensiveness of a mink farm
Odour offensiveness of a mink farm
Dependence of annoyance spread on the size of a farm
Milena Połeć
Part of a master thesis carried out in the Laboratory for Odour Quality of the Air under supervision of prof. dr hab.eng. Joanna Kośmider
Szczecin University of TechnologyDepartment of Technology and Chemical Engineering
Institute of Chemical Engineering and Environmental Protection Processes
Plan of presentation
• Introduction
• Aim and scope of the work
• Methodology
• Calculations of odour concentration in the ambient air in the surroundings of animal farms of various sizes
– typical meteorological situation
– calendar year
• Summary of the results
Introduction
Complaints about odour nuisance of animal breeding and raising make 17% of all complaints about nuisance of economic activity (data from the year 1993).
In the year 1993 complaints about odour nuisance of fur farms made 6% of all complaints about nuisance of animal raising.
One can assume that nowadays the share of the complaints about this sort of animal breeding is even bigger.
Recently complaints about mink farms, whose number is rising (4,5% of the world fur production), have been more and more recent.
Mink breeding is most intensely developed in the north-western Poland(West-Pomeranian Province).
Legislative works do not catch up with farming development.In Poland an executive ordinanace of Minister for the Environment on standards of odour quality of the air and methods of its evaluation has not been published so far.One of the ordinance projects is based upon the rules similar to the ones determined in Germany at the beginning of 1990s.
Way of an area development
D60
[ ou/m3 ]
T%
existing state
till31.12.2012
according to an aim
from01.01.2013
A21
8 3
B2 15 8
A2 – area of housing estates: detached housing, house of flats; area of service housing: housing connected with administration, health service, trade, religious cult, science, education, culture and art, rest; areas of recreation and rest: areas of holiday resorts, areas of children plays resorts, beaches, arranged parks and squares, greenery (beyond street ways), sport areas;B2 – agricultural areas: housing estates, farming estates; D60 [ou/m3] – admissible level of odour substances in the ambient air, average value reffering to 60 minutes ,T % – admissible freequency of D60 exceeding [% hours a year].
Aim and scope of the work
• The considered aim of this work was to determine the size of the areas, on which the probability of a nuisant odour occurence exceeds the levels of 8 and 15%.
• The basis for calculations was the odour emission factor – determined by Mr Jacek Zdyb (median of a set of experimantal values collected in Strumiany):
Fqod = 4,4 Gou / year x 1000 minks
• Calculations were conducted for six hypothetical mink farms with the stock of:
10 000, 30 000, 50 000, 70 000, 90 000 and 110 000 minks.
Methodology
It was assumed that animal houses are arranged in squares of various
dimensions (distances between the animal houses – analogically to
NOREX Strumiany ltd.).
Dispersion simulations were conducted according to a model
recommended by the Minister for the Environment (program:
Operat, PROEKO).
Calculations of:
– average concentrations cod,60-m [ou/m3] in a stable meteorological
condition (typical for the province)
– probability of occurence of exceeding defined levels of cod,60-m [ou/m3] in
a year scale were conducted.
The wind rose of Szczecin-Dąbie was utilised.
Number of observations = 29220 List of shares of individual wind directions %
1 2 3 4 5 6 7 8 9 10 11 12
NNE ENE E ESE SSE S SSW WSW W WNW NNW N
8,17 7,17 6,79 10,34
5,97 3,05 7,00 21,50
15,57
6,37 3,90 4,18
List of shares of individual wind velocities %
1 m/s 2 m/s 3 m/s 4 m/s 5 m/s 6 m/s 7 m/s 8 m/s 9 m/s 10 m/s 11 m/s
11,01
16,30
17,87
16,31
13,28
9,66 7,42 4,64 2,13 0,78 0,60
Results of odour concentration calculations
cod,60-m [ou/m3]
in a stable meteorological condition:
wind velocity: 3 m/s
wind direction: WSW
10 000 minks
wind velocity: 3 m/swind direction: WSW
10 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
10,5
0,1
0,1
Skala 1: 15483
30 000 minks30 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1
0,50,5
0,1
0,1
0,1
0,1
Skala 1: 15483
wind velocity: 3 m/swind direction: WSW
50 000 minks110 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1
0,5
0,5
0,1
0,1
0,1
0,1
Skala 1: 15483
wind velocity: 3 m/swind direction: WSW
70 000 minks70 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1
0,50,5
0,1
0,1
0,1
0,1
Skala 1: 15483
wind velocity: 3 m/swind direction: WSW
90 000 minks90 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1
2,34
0,5
0,5
0,1
0,1
0,1
0,1
Skala 1: 15483
wind velocity: 3 m/swind direction: WSW
110 000 minks110 tys. Stężenia średnie
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1
1
0,5
0,5
0,5
0,1
0,1
0,1
0,1
0,1
Skala 1: 15483
wind velocity: 3 m/swind direction: WSW
In a meteorological situation prevalent on the area of the Province, average odour concentration exceeds the level of
cod, 60-m = 0,1 ou/m3
(environmental detection threshold)
on the downwind side of a farm to the distances of:
10 000 minks 200 m 30 000 minks 500 m 50 000 minks 700 m 70 000 minks 800 m 90 000 minks 1 000 m110 000 minks 1 150 m
Conclusion 1
Conclusion 1
Results of calculations of probability of exceeding the recognition threshold in the year scale
cod,60-m = 1 ou/m3
Szczecin-Dąbie wind rose
10 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
158
Skala 1: 15483
10 000 minks
Szczecin-Dąbiewind rose1 ou/m3
30 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
88
Skala 1: 15483
Szczecin-Dąbiewind rose
30 000 minks
1 ou/m3
50 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1515
88
Skala 1: 15483
Szczecin-Dąbiewind rose
50 000 minks
1 ou/m3
70 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1515
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
70 000 minks
1 ou/m3
90 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
8
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
90 000 minks
1 ou/m3
110 tys .
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
8
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
110 000 minks
1 ou/m3
On the area embraced by Szczecin-Dąbie wind rose the probability of exceeding the 1 ou/m3 concentration is bigger than 8% in the belt of maximum 120 m surrounding the emitter.
Conclusion 2
Results of calculations of probability of exceeding the environmental odour detection thereshold in the year scale
cod,60-m = 0,1 ou/m3
10 000 minks
0,1 ou/m3
10 tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
1515
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
30tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
15
88
88
Skala 1: 15483
Szczecin-Dąbiewind rose
30 000 minks
0,1 ou/m3
50tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
15
15
8
8
8
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
50 000 minks
0,1 ou/m3
70tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
1515
88
8
88
Skala 1: 15483
Szczecin-Dąbiewind rose
70 000 minks
0,1 ou/m3
90tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
15
15
15
8
8
88
8
Skala 1: 15483
Szczecin-Dąbiewind rose
90 000 minks
0,1 ou/m3
110tys.
Y
X
N
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-1000 -750 -500 -250 0 250 500 750 1000
15
15
1515
15
8 8 8
8
8
Skala 1: 15483
Szczecin-Dąbiewind rose
110 000 minks
0,1 ou/m3
On the area embraced by Szczecin-Dąbie wind rose the probability of exceeding the 0,1 ou/m3 concentration is bigger than:
• 8% in the distance from 150 meters to 660 meters, • 15% in the distance from 100 meters to 450 meters,
depending on the size of the farm. It refers to the area located within the range of prevalent SW winds.
Conclusion 3
Number of minks
Distance from the emitter boundary to the selected isolines [m]
15% 8%
10 000 100 150
30 000 220 300
50 000 280 420
70 000 340 500
90 000 390 580
110 000 450 660
Conclusions
• On the area embrased by the Szczecin-Dąbie wind rose the probability of excceding the concentration of 1 ou/m3 is bigger than 8% in the belt of 120 m wide surrounding the emitter.
• On the area embraced by Szczecin-Dąbie wind rose the probability of exceeding the 0,1 ou/m3 concentration is bigger than:
- 8% in the distance from 150 meters to 660 meters, - 15% in the distance from 100 meters to 450 meters,
depending on the size of the farm. It refers to the area located within the range of prevalent SW winds.
In a meteorological situation prevalent on the area of the Province on the downwind side of a farm, an average odour concentration exceeds the environmental detection threshold (cod, 60-m = 0,1 ou/m3) at the distances:
- to 200 m – for farms of 10 thousand minks,- to 1150 m – for farms of 110 thousand minks.
Thank you for your attention!