- American Bio-Systems
 - Develops and markets biological products for the food service industry to remediate fat, oil, and grease problems. - Thermaco
- Separation technology company in the field of oil and grease extraction from wastewater.
- Darling International
- Provides recycling and rendering services in which animal and food waste products are turned into useful commercial goods, including tallow, protein meals, and yellow grease.
- PS International
- Manufactures oil-water separators.
- Burbank Grease
- Grease recycling services for the restaurant industry.
- Proceptor
- Manufactures a complete line of wastewater separators for removing oil, grease, and solids.
- Halgan Services
- Manufacturers of grease traps, oil/water separators, septic filters, and pump units.
- Greaseland
- Operator of grease recycling pickup services.
- Amerisep
- Provides information about grease traps including maintenance, cleaning, and pumping. Helpful for clogged and stopped up drains and kitchen grease.
- McKendree's, Inc.
- Supplier of automatic grease traps.
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