Downey Ridge Environmental is the West Virginia company behind Greasezilla, a waste-to-energy technology developed to address the difficult disposal of fats, oils and grease. Its systems help wastewater facilities and grease haulers recover brown grease as a biofuel feedstock while sending separated water for treatment. The company announced a 2024 agreement with bp to support expansion of this approach through new FOG receiving stations.
EPA National Pretreatment Standards, CFR 40 403.2 and CFR 40 403.5
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Renewable Fuel Standard (RFS)
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IMO 2020 Sulfur Limits
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GeneSyst GPV technologies, IncFormed in Ohio in 1991, GeneSyst GPV technologies, Inc. develops and licenses Gravity Pressure Vessel technology that converts organic and hazardous wastes into energy and other usable products. The privately held company is the exclusive licensing source for its patented GPV system and coordinates design, implementation and technical support for licensees in ten states and 34 countries. Its technology is designed as a closed, water-based process rather than combustion, with applications including municipal waste conversion to ethanol.HUDSON, OH
Ecotone RenewablesFounded in 2019 by three engineers, Ecotone Renewables is a Pittsburgh public benefit corporation built around the idea that food waste should stay useful rather than fill dumpsters. The founder-led company helps commercial kitchens and institutions handle scraps on site, with its service team managing the equipment and turning the resulting material into liquid fertilizer. Its work has diverted more than 1 million pounds of food waste and supported 14 operating ZEUS units.325311WILKINSBURG, PA
iNBIO International BioRefineries, LLCiNBIO International BioRefineries is a Salisbury, Maryland company built around turning difficult-to-use biomass waste into practical energy and carbon products. It designs and operates fast-pyrolysis systems for organizations seeking to put agricultural or forestry residues to work, while its process recycles syngas to supply reactor heat.ELLICOTT CITY, MD
Decarb Energy PartnersDecarb Energy Partners is an emerging clean-energy company known for pairing PFAS risk management with local fuel production for wastewater facilities. Its modular Biosolids+™ trailers convert contaminated sludge into biofuel on site, while the company finances and operates the equipment for utility partners.