11
Jay E Ort: High quality methane gas through modified anaerobic digestion. ERA Incorporated, Berman Aisenberg & Platt, September 21, 1976: US03981800 (47 worldwide citation)

Conventional anaerobic digestion, as practiced in municipal waste treatment plants, is modified to yield high-quality methane gas. Upwards of 98 percent methane is produced rather than the normal 60 to 70 percent methane (diluted with carbon dioxide).


12
Thomas E Whittle: Anaerobic wastewater treatment system. Commonwealth Engineering & Technology, Neuman Williams Anderson & Olson, December 30, 1986: US04632758 (46 worldwide citation)

An anaerobic apparatus for treating wastewater is disclosed. The treating apparatus comprises a reactor housing a media having a plurality of surfaces for receiving bacteria. The wastewater that is to be treated, is introduced into the bottom of the reactor and forced up over the surfaces of the med ...


13
Masahiko Ishida, Ryoichi Haga, Yoji Odawara: Anaerobic digestion process. The Agency of Industrial Science and Technology, Birch Stewart Kolasch and Birch, July 22, 1980: US04213857 (43 worldwide citation)

The present invention relates to a process for digestion treatment of organic wastes that are difficult to digest, with a high efficiency and an improved recovery rate of methane.


14
Jerrel Dale Branson: System and method for extracting energy from agricultural waste. Best Biofuels c o Smithfield Foods, Hunton & Williams, November 30, 2004: US06824682 (43 worldwide citation)

The present invention relates to a process and apparatus for processing agricultural waste to make alcohol and/or biodiesel. The agricultural wastes are subjected to anaerobic digestion which produces a biogas stream containing methane, which is subsequently reformed to a syngas containing carbon mo ...


15
Jerrel Dale Branson: System and method for extracting energy from agricultural waste. Best Biofuels c o Smithfield Foods, Hunton & Williams, January 30, 2007: US07169821 (42 worldwide citation)

The present invention relates to a process and apparatus for processing agricultural waste to make alcohol and/or biodiesel. The agricultural wastes are subjected to anaerobic digestion which produces a biogas stream containing methane, which is subsequently reformed to a syngas containing carbon mo ...


16
Vipul J Srivastava: Two-phase anaerobic digestion of carbonaceous organic materials. Institute of Gas Technology, Speckman Pauley & Fejer, March 19, 1996: US05500123 (42 worldwide citation)

A process for improved methane production by two-phase anaerobic digestion of organic carbonaceous material in which organic carbonaceous material is fermented under anaerobic conditions in an acid phase digester, forming a liquid/solids effluent, the liquid/solids effluent is fermented under anaero ...


17
Sambhunath Ghosh, Donald L Klass: Methane production from and beneficiation of anaerobic digestion of plant material and organic waste. United Gas Pipe Line Company, Thomas W Speckman, May 11, 1982: US04329428 (42 worldwide citation)

A process for improved methane production resulting in higher yield and higher production rates by anaerobic digestion of a mixture of plant material and organic waste. The process is suitable for production of synthetic natural gas and through anaerobic digestion of a mixture of plant material and ...


18
Charles G Steiner: Two phase anaerobic digestion process utilizing thermophilic, fixed growth bacteria. Purification Industries International, Litman McMahon and Brown L L C, May 20, 1997: US05630942 (41 worldwide citation)

An improved anaerobic waste water treatment process comprising the steps of introducing waste water containing organic material into a first reaction zone containing thermophilic, fixed growth, hydrolytic and acidogenic bacteria and fermenting the waste water in the first reaction zone under anaerob ...


19
David P Chynoweth, Vipul J Srivastava, Richard Biljetina, Thomas D Hayes: Solids concentrating anaerobic digestion process and apparatus. Gas Research Institute, Thomas W Speckman, Ann W Speckman, April 5, 1988: US04735724 (40 worldwide citation)

A non-mixed vertical tower anaerobic digester and anaerobic digestion process provides passive concentration of biodegradable feed solids and microorganisms in an upper portion of a continuous digester volume and effluent withdrawal from the middle to bottom portion of the digester, resulting in inc ...


20
Peter H Benson, William S Wickersham: Solid fuel and process for combustion of the solid fuel. Speckman Pauley & Fejer, July 4, 1995: US05429645 (40 worldwide citation)

A solid fuel containing a recycled residue from anaerobic fermentation or anaerobic digestion of an organic material. The solid fuel can also contain a volatile solid fossil fuel. The residue is preferably derived from an anaerobic digestion process of municipal solid waste, raw sewage sludge, bioma ...



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