John R Rysgaard Sr: Diaphragm tank cover. Fiberglass Specialty Co, Dugger Johnson & Westman, November 29, 1977: US04060175 (19 worldwide citation)

A digester tank assembly for use in digester systems for anaerobic digestion of waste water sludge comprising a tank having a fixed exterior cover, and a diaphragm member mounted in the tank dividing the tank into upper and lower compartments, said diaphragm member being positioned above the normal ...

Robert Paton: Anaerobic digestion of organic waste for biogas production. Biorganic Energy, Roylance Abrams Berdo & Goodman, January 31, 1984: US04429043 (18 worldwide citation)

A low solids aqueous suspension of organic waste is treated in at least four, e.g., six serial anaerobic zones at a temperature of less than 40.degree. C. and under quiescent conditions to provide methane, fertilizer and a clean liquid effluent.

Hendrik M Bremmer: Apparatus for the anaerobic fermentation of organic waste material such as liquid manure. Corite Investments, Hopgood Calimafde Kalil Blaustein & Judlowe, April 1, 1986: US04579654 (18 worldwide citation)

An apparatus for the anaerobic digestion of organic waste material such as manure in liquid condition include bringing the waste material in an acidification space with a roof collecting gas generated thereby and one or more openings below said roof giving access from said space to a methane ferment ...

David E Hallberg, Victor W Schlesinger: Integrated process for producing “clean beef” (or milk), ethanol, cattle feed and bio-gas/bio-fertilizer. Prime Bioshield, Bacon & Thomas PLLC, June 3, 2008: US07381550 (18 worldwide citation)

An ethanol unit and anaerobic digestion/bio-fertilizer unit are integrated with a cattle feedlot (or dairy operation), wherein a continuous, balanced process yields a sanitary, low- to zero-pollution, and economically efficient production of “clean beef” (or milk), fuel ethanol, and bio-gas/bio-fert ...

Ann C Wilkie: Fixed-film anaerobic digestion of flushed manure. University of Florida Research Foundation, Saliwanchik Lloyd & Saliwanchik, November 2, 2004: US06811701 (18 worldwide citation)

An apparatus for the fixed-film anaerobic digestion of flushed livestock manure includes an enclosed digester tank (fixed or flexible roof), internal media for biofilm development, a biogas collection and flare system, various pumps, and hydraulic control systems. The preferred media has substantial ...

Luc De Baere: Process and installation for anaerobic digestion. Ateliers de Constructions Electriques de Charleroi, Schwartz Jeffery Schwaab Mack Blumenthal & Evans, August 4, 1987: US04684468 (17 worldwide citation)

In the process of treating organic materials comprising a preparation phase in which the organic material to be digested is mixed with an appropriate inoculant and introduced into an anaerobic digester (6), the organic materials are mixed with the inoculant in a mixer (3) in order to form a solid-ap ...

Richard E Peterson: Anaerobic digester technology. Anthony G Eggink, June 15, 1982: US04334997 (17 worldwide citation)

The anaerobic, displacement-type digester is for the biological production of methane gas. The process involves the anaerobic digestion of solid waste and water or a sewage slurry to produce a methane-rich gas, which can be utilized for its energy value. The digester includes a tank-type enclosure c ...

Vadake R Srinivasan, Wilbur Monceaux: Anaerobic digestion process, and forced fed fast rate digester. Micro Pure Systems, Llewellyn A Proctor, December 5, 1989: US04885094 (17 worldwide citation)

An anaerobic process for the digestion of organic wastes, and novel anaerobic digester. In digestion of the organic wastes in the presence of anaerobic microorganisms, at anaerobic conditions, the carbon:nitrogen and nitrogen:phosphorus ratios of the digestion are adjusted to optimize the rate of an ...

David J Fischer, Richard M Narske, John C Thomas, Edward J Worthington Jr: Stacked modules for anaerobic digestion. Universal Research and Development, Benjamin P Reese II, February 3, 1981: US04248972 (17 worldwide citation)

A compact vertical array of concentrically stacked and interfaced anaerobic digestion modules which comprise an anaerobic digestion sub-system. Each individual digestion module is an open-ended reaction vessel having an external flange on each end. Each pair of adjacent reaction vessels has a suitab ...

Alex Petroski: Mobile sludge trailer and method of filling and emptying same. Liquid Removal Service Co, Benasutti Associates, April 4, 1978: US04082672 (16 worldwide citation)

A novel trailer is described which is particularly well-suited for receiving, transporting and unloading sludges which range in consistency from nearly liquid to semi-solid or otherwise extremely viscous materials. The novel trailer of the present invention is adapted to selectively promote aerobic ...