Grease Separation Process

Enables the operator to remove FOG from the grease trap waste stream, reduce waste disposal expenses, create a new revenue stream and run a greener, more eco-friendly operation. It produces and consumes its own fuel: brown grease, a byproduct of the separation process.

Here’s how the system works: First let gravity separate the water and the grease in decant tanks. Drain the water into a municipal sewer drain. Pump the remaining grease and sludge into a 10,000-gallon Greasezilla™ tank. Grease traps typically have a water-to-sludge ratio of 3:1 or 4:1 and brown-grease content of 3 to 10 percent.

A boiler heats the tank contents to a temperature of about 160 degrees. In approximately 24 hours, the contents separate into four distinct layers: rich brown grease (a valuable commodity sold directly as a biofuel or as feedstock for biodiesel); debris; water; and food particles. The brown grease can be pumped out and sold while the remaining content, which is pasteurized and nearly oil free, may be land-applied or discharged into a sewage treatment facility. The Greasezilla™ unit runs on brown grease; about 5 percent of the brown grease produced in each batch is pumped back into the system and used as fuel.

Greasezilla™ eases the financial sting of ever-increasing disposal fees, labor costs and transportation expenses associated with trips to further treatment and waste water plants. In addition, it generates another revenue stream by selling brown grease and/or processing grease for other pumpers.

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