Formed 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.
EnRevo PyroEnRevo Pyro is a U.S.-based technical company whose team brings experience from fields ranging from petroleum refining to marine engineering and stock-car racing. It develops waste-to-value systems for municipalities, commercial operators and other project partners, using processes such as fast pyrolysis to turn difficult waste streams into usable energy and materials.New York, NY
Estech USA, LLCFrom its Pataskala base, Estech USA develops and commercializes patented autoclave systems that sterilize, reduce and sort municipal solid waste. The company’s Fibrecycle® technology uses pressurized steam and mechanical action to recover recyclable materials and biomass for electricity, while its history reaches back to a University of Alabama prototype built in 1992. Estech USA acquired the Remtec rights and assets in 2010 and later developed the MOD-4 variation for used diapers and coincidental medical waste.PATASKALA, OH
Downey Ridge Environmental (Greasezilla)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.ANSTED, WV
Eco Waste SolutionsSince 1993, Eco Waste Solutions has been an award-winning cleantech manufacturer known for tackling waste problems in places where ordinary disposal options are limited. The North American company has delivered thermal waste-conversion projects in 18 countries for governments, communities, military organizations and remote industrial operations, including a long-running role in expeditionary waste management. Its work spans project guidance through implementation, with systems designed to operate in demanding climates and locations.BATAVIA, NY