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It is estimated that 23–28% of Sanitary Sewer Overflows (SSOs) are due to Fats, Oils and Grease (FOG) or as much as 19 million gallons from 1998 to 2001 (State of North Carolina, 2004). Our increasingly mobile society has led to a decrease of cooking at home and a significant growth in the commercial food sector. This, on top of other industries such as metal processors, meat packers, cosmetic manufacturers and industrial laundry establishments that already contribute to oil and grease in the waste stream, highlights the need for publicly owned treatment plants (POTWs) to regulate and monitor FOG. Besides clogged sewer lines, high FOG levels also disrupt the effective operation of a wastewater treatment plant. Many POTWs have instituted FOG control programs. An important feature of any FOG program is locating and monitoring industries and food service establishments dumping high levels of FOG in the sewer line. Waiting for remote laboratory results can add costs in time and dollars. An accurate, quick and simple form of onsite analysis can greatly assist regulators as well industries that want to insure their pretreatment system is operating properly. A new simplified procedure for FOG analysis based on solvent extraction and infrared absorption can give a regulator or operator an onsite result in less than 10 minutes.

Document Type: Research Article


Publication date: January 1, 2005

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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 These proceedings are not peer reviewed.

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