Brændefyrings bidrag til luftforurening - DCE - Nationalt Center for ...

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This report is based on results from the research project WOODUSE.
Furthermore, it summarises some of the available knowledge on air
pollution from residential wood combustion in Denmark. One objective
of the report is to clarify issues that may cause misunderstandings in the
public debate on smoke from wood stoves. However, the report does not
pretend to cover all aspects of air pollution from wood combustion in
Denmark.
WOODUSE is a comprehensive research project with the title 5HVLGHQWLDO
ZRRG FRPEXVWLRQ DQG WKH LQWHUDFWLRQ EHWZHHQ WHFKQRORJ\ XVHU DQG
HQYLURQPHQW The project is interdisciplinary and covers a wide range of
issues related to residential wood combustion. It includes investigations
of emissions, air pollution level in outdoor and indoor air, health effects
and social aspects. The project has had participation by four Danish
institutions (National Environmental Research Institute at Aarhus
University, National Research Centre for the Working Environment,
Department of Public Health, University of Copenhagen, Department of
Civil Engineering, Technical University of Denmark). The project has
received funding from the Strategic Research Council (grant ENMI-2104-
05-0010, period 2006-2009).
The central new work in the present report concerns results from a measurement
campaign in the village of Slagslunde and derived results that
have been obtained by combining the measurements with air quality
model computations. Furthermore, the report presents results from other
Danish and international studies, compiled here in order to provide an
overview of central issues related to residential wood combustion.
One can distinguish between SULPDU\ particles and VHFRQGDU\ particles.
Primary particles exist as particles immediately after they have left the
source. Secondary particles were not ’born’ as particles, but are created
from gases, which undergo chemical and physical transformation during
transport – a process that continues for several hours or days after the
pollution has left the source. Secondary particles can be further characterised
as VHFRQGDU\ LQRUJDQLF particles or as VHFRQGDU\ RUJDQLF particles.
Emission inventories of particle pollution address only primary particles.
Domestic wood combustion is a dominating source to Danish emissions
of primary particles.
On the other hand, concentration measurements in the atmosphere comprise
ERWK primary and secondary particles. Considered on a yearly basis,
the contribution from wood combustion does not constitute a dominant
fraction of the total amount of particle pollution in the air.
However, this does not mean that the contribution from wood combustion
is unimportant. The contribution is considerable, and many studies
in literature have established a clear statistical correlation between particle
pollution and adverse health effects. There is no indication that parti-