31
Cees J N Buisman: Process for the removal of sulphur compounds from gases. Paques, Young & Thompson, October 11, 1994: US05354545 (21 worldwide citation)

A process for the removal of sulphur compounds from a gaseous effluent, comprising the steps of: a) contacting the gaseous effluent with an aqueous solution wherein sulphur compounds are dissolved; b) adjusting the concentration of buffering compounds such as carbonate and/or bicarbonate and/or phos ...


32
Roberto Pellegrin, Silvio Tasca, Franco Tasca: Method for the breakdown and recycling of solid urban waste by anaerobic fermentation. Rosewell, Sughrue Mion Zinn Macpeak & Seas, May 4, 1993: US05207911 (20 worldwide citation)

The urban waste is crushed (2) to dimensions no greater than 5 cm and intimately mixed (5) with a aqueous suspension of biological sludge preconditioned at a temperature of from 40 to 100.degree. C. (6) and having a dry content of from 3 to 30% by weight, the suspension thus obtained, inoculated wit ...


33
Giorgio Ruffo, Luciano Vezzani: Process for recycling and reutilizing waste, in particular solid urban waste. Vezzani S p A, Guido Modiano, Albert Josif, April 23, 1991: US05009672 (20 worldwide citation)

Process for recycling and recovering solid urban waste and the like, consisting in subjecting solid urban waste (SUW), after the removal of any ferromagnetic material present therein, to high-pressure compression inside a screening press or the like, so as to separate the putrescible organic materia ...


34
Schiedermeier Ludwig: Device for anearobic fermentation of biomass. Schiedermeier Ludwig, June 16, 2004: EP1428868-A1 (20 worldwide citation)

Apparatus for anaerobic fermentation of biomass (7) comprising a fermenter (1) comprising at least one fermentation cell (5) with a gas-permeable base plate (8) for aeration, intermediate and main biogas reservoirs (2, 3) that can be connected to opposite sides of the base plate through biogas lines ...


35
Haskell Edwards: Apparatus and method of circulating a body of fluid containing a mixture of solid waste and water and separating them. Edwards Laboratories, Darby & Darby, August 15, 1995: US05441634 (19 worldwide citation)

An apparatus and method of creating circulation of a mixture containing solid waste and water such as sludge and separating these components. The apparatus includes a tank housing, in inverted funnel-like element within the housing for constricting upward flow of a gasborne mixture, a trapped gas po ...


36
David H Archer, Frank I Bauer, Edward J Vidt: Process for electric power production using a biogas. Westinghouse Electric, Daniel C Abeles, January 27, 1987: US04638629 (19 worldwide citation)

Electric power is produced in an electric power generating combustion turbine using a biogas as fuel thereto, where a biogas, leaving a biomass gasification system at an elevated temperature of 650.degree.-875.degree. C. and containing tars, is partially cooled by injection of a spray of water there ...


37
Vasant Ramchandra Choudhary, Balu Shivaji Uphade, Ajit Singh Mamman, Amarjeet Munshiram Rajput: Process for the preparation of an improved supported catalyst, containing nickel and cobalt, with or without noble metals, useful for the oxidative conversion of methane, natural gas and biogas to syngas. Council of Scientific And Industrial Research, Michael D Kilpatrick Stockton Bednarek, April 28, 1998: US05744419 (19 worldwide citation)

A supported catalyst is prepared by depositing oxides of nickel and cobalt, with or without noble metals, on a sintered low surface area porous inert support, surface of which is precoated with an oxide of Be, Mg, Ca or a mixture thereof so that a protective layer of the alkaline earth oxide is form ...


38
Robert Paton: Anaerobic digestion of organic waste for biogas production. Biorganic Energy, Roylance Abrams Berdo & Goodman, January 31, 1984: US04429043 (17 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.


39
Gilbert Ducellier, Andre Pavia: Method of degrading organic products, by-products and scraps in an anaerobic medium. Gilbert Ducellier, Andre Pavia, Union Industrielle et d Entreprise, Valorga, Steinberg & Raskin, October 25, 1988: US04780415 (17 worldwide citation)

A method and apparatus for carrying out a degradation in an anaerobic medium, such as a methanogenesis, of organic products, by-products or waste from human, animal and/or plant origin, involving feeding said products to be degraded into a closed fermentation vessel, forcing said products to flow in ...


40
Armand Cotton: Method of producing biogas and compost. Steele Gould & Fried, January 21, 1986: US04565552 (17 worldwide citation)

In the mesophile production of biogas, the temperature of the liquid used during anaerobic, methanogenic, fermentation is raised to the required temperature (about 35.degree. C.) by aerobically prefermenting solid substrate at substantially ambient temperature and of appropriate moisture content to ...



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