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A. BHATT ET AL.
Figure 3. Emission factors for selected pollutants based on the data reported in NCASI technical bulletins. Data for “MACT testing” and the “pulp and paper” do not indicate feed type because these emission factors are based on data from several boilers where the feed composition is not uniform.
and 51% sludge. The reported emission factor for SO 2 is highest for boilers burning 49% wood and 51% sludge, which could be because of the high sulfur content in the sludge. The reported VOC emission factors are much lower compared to other pollutants. The emission fac- tors reported by NCASI technical bulletins are based on
data obtained from several biomass combustion sources across years, shown as a mean value. Moreover, the feed composition varies from other data sources, resulting in discrepancies among air pollutant emission factors when compared with each other. This explains why the emis- sion factors reported by NCASI may be several orders of
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