EMISSIONS OF VOLATILE ORGANIC-COMPOUNDS AND HAZARDOUS AIR-POLLUTANTS FROM ORIGEN DELIGNIFICATION SYSTEMS

Three NCASI and EPA methods were used to determine the emissions of vo latile organic hazardous air pollutants (HAPs) selected volatile organ ics, and EPA Method 95A total volatile organic compounds (VOCs) from s ix oxygen delignification systems and two white liquor oxidation syste ms. Selected process streams were also analyzed for their acetaldehyde , dcetone, methanol, and methyl ethyl ketone content. The study showed that (a) there was a strong correlation between the final postoxygen washer shower water methanol content and total HAP emissions from oxyg en delignification systems, (b) the total HAP and EPA Method 25A total VOC emissions were not functions of the wood species being delignifie d, and (c) if methanol-free shower water is used as final postoxygen t reatment total methanol emissions from the oxygen delignification syst em of about 0.3 lb/ODTP are expected.