Emissions Graph

« Sep 24, 2018

View Data For Sep 25, 2018

Notes:

Notes:

Sulfur Dioxide (SO₂) is created when air (which is 78% nitrogen, 20% oxygen and 2% inert gases) used for combustion combines with sulfur in the fuel. Sulfur Dioxide can be a byproduct of any combustion processes that have fuel with sulfur in it, whether it is burning leaves in your backyard or a power plant burning oil, coal or trash. All these fuels have sulfur in them. Wheelabrator North Andover injects lime into its Spray Dryer Absorbers (SDAs or scrubbers) to absorb, neutralize and remove sulfur dioxide in the emissions. Wheelabrator North Andover has a sulfur dioxide permit limit established by the Massachusetts Department of Environmental Protection that requires either of the following: a limit of 29 parts per million (29 ppm) of sulfur dioxide in the emissions (corrected to 7% oxygen) OR else we are required to remove over 75% of the sulfur dioxide (75% RE or Removal Efficiency) in the emissions. Modern trash-to-energy plants like WNA are required by the regulatory agencies to achieve either standard (29 ppm OR 75% RE), not necessarily both.