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Food establishment sludge or grease is defined as the material pumped from the grease traps located in the wastewater drain lines at restaurants, fast food preparation facilities, grocery stores, and institutions with food preparation/processing facilities. The haulers will collect grease at the food these facilities and transport to a grease handling facility. The grease handling facilities are comprised of the following main components: septage receiving station, holding tanks, degritting equipment, and grit pump and grease/septage dewatering equipment.

Grease (along with septage, if used as a carrier) is discharged directly from the haulers' tank trucks to the septage holding tank passing through a screening system. The grease is further processed with dewatering, and stabilized for land application, or undergo further treatment. Chemicals may be used to increase the process efficiency or to stabilize the dewatered solids. The grease is processed at a publicly owned or privately owned grease handling facility. Several alternative grease-handling technologies are investigated in this paper.

Document Type: Research Article


Publication date: January 1, 2003

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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 These proceedings are not peer reviewed.

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