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Emissions Reduction from Digester Gas IC Engines at WWTPs using a Catalytic Oxidizer System

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Annual emissions calculated using source testing data and operational information determined that the internal combustion engines (IC Engines) at the Orange County Sanitation District (OCSD) wastewater treatment plants (WWTPs) are the largest sources of criteria pollutants and air toxics (mostly formaldehyde) emissions from the two facilities. In addition, the emissions of carbon dioxide (CO2), a greenhouse gas, from the IC Engines were larger than all other onsite direct and indirect sources combined. Therefore, the greatest reduction of criteria pollutants, air toxics, and greenhouse gases from the OCSD WWTPs can be achieved by the reducing emissions from the IC Engines.

This paper includes information related to the determination of methods and means for achieving this goal and the detailed description of the pilot study of the catalytic oxidizer system as one of the most promising technologies for controlling emissions.

Keywords: Emissions; air toxics; digester gas; emissions controls; greenhouse gases; internal combustion engines; renewable fuel; wastewater treatment plant

Document Type: Research Article


Publication date: January 1, 2009

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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