• Specialty

  Air Quality
  

• SECTOR

  Industrial
  

• TYPE

  Permitting / Compliance
  

• CLIENTELE

  Local Government
  

• TIMESPAN

  2014

• LOCATION

  Moretown, VT

Moretown Landfill Sulfur Dioxide Minimization Program

SERVICE:

Hydrogen Sulfide Removal to Prevent Conversion to SO2

DESCRIPTION:

As part of the effort to collect additional odor, an assessment was made to determine effects these modifications would have on the landfill-gas-to-energy systems and the utility flare. Sulfur dioxide is regulated under the Clean Air Act and also under a separate state requirement to protect the natural environment. Furthermore, the sulfur dioxide can also be odorous at higher concentrations.

Tech examined a number of options and settled on a temporary carbon adsorption system. Tech specified a two stage lead-lag system and procured carbon that would have a higher-than-usual capacity for hydrogen sulfide. This system is planned to be in place, at least until Cell 3 is fully covered, and the overall gas generation rate begins to wane.

As part of this study, Tech also explored a potential long-term solution, if one was necessary, for the proposed Cell 4 expansion. The recommendation was for a different technology long-term.

 

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Key Points

• Tech identified a need for hydrogen sulfide reduction to reduce a byproduct of combustion
• Tech was able to act quickly and provide a vendor and carbon supplier to address a potential increase in hydrogen sulfide after better landfill gas capture methods were implemented.