What is Greasezilla?
Across the country, communities struggle with managing fats, oils, and grease (FOG) generated by restaurants and food processors. While many municipalities have FOG abatement programs, disposal options remain limited. This leaves haulers under pressure to find solutions, often resulting in landfill disposal or delivery to wastewater treatment plants (WWTPs). Unfortunately, landfill disposal wastes a valuable resource and produces methane emissions, while untreated FOG at WWTPs creates costly maintenance challenges.
Greasezilla™ introduces a sustainable alternative by transforming FOG into a resource. Its advanced separation technology extracts brown grease—a high-value biofuel feedstock for renewable diesel and sustainable aviation fuel (SAF)—while reducing the remaining water to a low-BOD, low-TSS effluent that can be safely treated at WWTPs.
The process is straightforward. Upon arrival at a Greasezilla facility, FOG is screened to remove grit and solids, then transferred to decant tanks for stratification. Water is separated and returned to the WWTP headworks, while the concentrated FOG undergoes thermal separation in the Greasezilla system. This produces three layers:
Brown grease
automatically recovered and stored for biofuel feedstock sales
Batter
suitable for composting, blending with municipal solid waste, or digestion
Effluent water
clean enough for standard treatment by converting waste into a marketable product, Greasezilla helps communities cut disposal costs, reduce environmental impact, and support renewable fuel production.
Greasezilla offers a turnkey, scalable solution for the recovery and separation of brown grease—turning a costly waste problem into a profitable clean fuel opportunity. The system delivers high Return on Investment (ROI) through tipping fees and the sale of advanced biofuels.
Key Features
High Throughput
Processes up to 60,000 gallons/day
Fully Automated
SCADA & sensor-driven system
Energy Efficient
Powered by reclaimed biofuel or gas
Compact & Modular
Fits within 2,000 sq ft footprint
Scalable
Interior or exterior deployment options
Environmentally Sustainable
Diverts waste from landfills and reduces methane emissions
Strategic Relevance
Greasezilla is aligned with growing demand for renewable diesel, SAF (Sustainable Aviation Fuel), and marine fuels, offering:
- Compliance with IMO, RFS, LCFS
- Eligibility for RINs, 45Z, and IRA tax incentives
- Use of low Carbon Intensity (CI) feedstocks like brown grease and UCO
Target Markets
- Wastewater treatment facilities
- Commercial liquid waste haulers
- Renewable fuel producers
- Municipalities and industrial food processors
Site Requirements
- Heavy Industrial Zoning
- 3 Phase Power
- Sewer Access (+ Industrial Discharge Permit)
- Conveniently situated off major arteries with good truck Access
- Natural gas or Greasezilla Fuel (other fuels possible)
- Commercial building (optional in warmer climates) 2,000 sf. Minimum18 ft eaves 12 x 14 ft doors
Proven Deployments
With operational success across the country, commercially and with municipalities, Greasezilla has demonstrated both technical reliability and economic value, supporting facilities that process up to 15 million gallons of FOG annually.
The System and Separation Process
Greasezilla’s℠ design provides site agility, allowing the system to be placed near the source of FOG creation. A standard system includes dual 10,000-gallon, double-wall, insulated steel tanks. As one tank heats and separates inputs, the other can be harvested, drained and reloaded. Once ingested, Greasezilla’s chemical-free separation process begins to divide the FOG waste into layers.
Greasezilla generates three distinct layers:
- Brown Grease, approximately 5-10 percent of the finished process, is recycled into Brown Grease Advanced Biofuel. Five percent of the ABF returns to fuel Greasezilla®, and the remaining 95 percent can be used for other heat requirements at the plant or as a salable fuel substitute on the commodities exchange.
- Batter, making up 5-10 percent of volume, can serve as an excellent feedstock for anaerobic digesters. It can also be treated with traditional processes, composted or be processed with the effluent water.
- Residual pasteurized water, comprising approximately 80-85 percent of the material and nearly free of suspended solids, can be safely discharged to a wastewater treatment facility or used for irrigation in drought-impacted regions.
Greasezilla℠ offers a practical, cost-effective, ecological process that turns FOG disposal into a significant economic opportunity.
Simple
- Systems are available for interior or exterior placements
- Is easy to operate and maintain
- Is modular and designed to be expandable and scalable
Ecological
- Removes FOG from the waste stream
- Processes it into a biofuel, reducing greenhouse gas emissions
- Creates pasteurized, headworks-ready effluent water
- Creates instead of consuming resources
Efficient
- Uses hydronic fluid rather than steam for heat transfer, eliminating scaling
- Requires no flocculants, polymers or other costly additives
- Exhaust emissions have no detectable color or odor
- Burns a small fraction of the very fuel it produces
- Processes 8-10 million gallons per year
Cost-Effective
- Eliminates costs associated with dewatering, drying, lagooning, land applying, incinerating, composting.
- Significantly reduces post treatment hauling volume and costs
- Greasezilla owners capture disposal fees from area haulers
- Generates revenue through the sale of the biofuel offtake