1
Sambhunath Ghosh, Donald L Klass: Two phase anaerobic digestion. Institute of Gas Technology, Dominik Knechtel Godula & Demeur, May 10, 1977: US04022665 (104 worldwide citation)


An improved two phase anaerobic digestion process in which an initial phase continually receives an organic feed for short detention times of less than two days under conditions which efficiently liquefy and breakdown the feed to lower molecular weight acids and other intermediates for conversion to ...


2
Jack L Ainsworth, Dan Atwood, Tom Rideout: Anaerobic digester system. Rick Matos, Innovar L L C, October 9, 2001: US06299774 (96 worldwide citation)


A process to recover energy, reduce pollution potential, and add value to organic waste such as animal manure is described. The process involves the anaerobic digestion of feedstocks, such as animal manure, at low to high temperatures in batch, semi-continuous or continuous reactors. The process mak ...


3
Masahiko Ishida, Ryoichi Haga, Tadashi Ishibashi, Yoji Odawara: Anaerobic digestion process for organic wastes. Agency of Industrial Science & Technology, Birch Stewart Kolasch & Birch, January 1, 1985: US04491522 (79 worldwide citation)


The present invention relates to an anaerobic digestion process for organic wastes with a high efficiency and an improved recovery rate of methane.


4
Byron A McDonald: Digester and process for converting organic matter to methane and fertilizer. John T Matlago, July 11, 1978: US04100023 (72 worldwide citation)


A digester is disclosed for controlling the decomposition of organic matter to produce a useful gas and a liquid fertilizer. The digester comprises three slurry chambers connected in tandem by passthrough tubes. A fourth chamber used for gas collection is located above the three slurry chambers. An ...


5
Paul B Tarman, David P Chynoweth: Hybrid bio-thermal gasification. Institute of Gas Technology, Thomas W Speckman, September 15, 1981: US04289625 (59 worldwide citation)


A hybrid bio-thermal gasification process for improved carbonaceous gasification wherein a biological feed is anaerobically digested with product methane and carbon dioxide containing gas withdrawn from the digester and biological residue separately withdrawn from the digester and introduced into a ...


6
Steven R Woodruff: Food, animal, vegetable and food preparation byproduct treatment apparatus and process. Gold Kist, Foley & Lardner, October 15, 2002: US06464875 (58 worldwide citation)


A system and method for converting animal, vegetable, and food byproduct materials into useful bio-gas and fertilizer, and/or soil amendment products has an anaerobic digester, a liquid-solids separating unit, an ammonia stripper, an ammonia absorption unit, a solids processing unit, and an equiliza ...


7
Juan Carlos Josse, John William Sutherlin: Organic slurry treatment process. International Waste Management Systems, Stoll Keenon & Park, February 17, 2004: US06692642 (52 worldwide citation)


A process is provided for full treatment of animal manure and other organic slurries containing suspended solids, and dissolved organic matter, nitrogen, and phosphorus, without the need for anaerobic digestion or anaerobic stabilization lagoons. The process includes: centrifugal decanting, floccula ...


8
Jack L Ainsworth, Dan Atwood, Tom Rideout: Integrated anaerobic digester system. Rick Matos, Innovar L L C, May 27, 2003: US06569332 (49 worldwide citation)


A process to recover energy, reduce pollution potential, and add value to organic waste such as animal manure is described. The process involves the anaerobic digestion of feedstocks, such as animal manure, at low to high temperatures in batch, semi-continuous or continuous reactors. The process mak ...


9
Frederick T Varani: Method and apparatus for the anaerobic digestion of decomposable organic materials. Bio Gas of Colorado, Edwin L Spangler Jr, January 20, 1976: US03933628 (48 worldwide citation)


This invention relates to an improved anaerobic digestion apparatus for decomposable organic materials characterized by a digestor covered and sealed by a liquid-filled pond heated with solar energy. The effluent from the fermentation reaction taking place in the digestor has excellent absorptivity ...


10
Yoshiaki Harada, Kenichi Yamasaki: Process for treating waste water. Osaka Gas Company, Larson and Taylor, October 15, 1991: US05057220 (47 worldwide citation)


The invention provides processes for treating waste water comprising subjecting waste water to liquid phase oxidation without catalyst, liquid phase oxidation with catalyst and anaerobic digestion and/or aerobic treatment.



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