51
George Valkanas, Apostolos G Vlyssides: Industrial utilization of garbage with effective recycling and with optimization in energy production. Innoval Management, Birch Stewart Kolasch & Birch, January 2, 2001: US06168642 (23 worldwide citation)

A recycling process for garbage containing a high proportion of paper where printed paper is first separated from the garbage. The garbage is then into pieces and light and heavy components are separated out in a classification tank. The remaining organic mass suspended in water is hydrolyzed and su ...


52
James L Gaddy: Performance of anaerobic digesters. Boyd D Cox, July 21, 1998: US05783081 (23 worldwide citation)

Methods of improving anaerobic digestion by enhancing the microorganism population through the creation of a nutrient environment more favorable for microbial growth and through the addition of microbes and, more particularly, by the addition of chelating agents, chelating agents and nutrients, and ...


53
Berend A Rijkens: Method for the anaerobic digestion of solid organic waste. Instituut voor Bewaring en Verwerking van Landbouwprodukten, Brumbaugh Graves Donohue & Raymond, August 23, 1983: US04400195 (22 worldwide citation)

The present invention relates to a method wherein solid organic waste originating from plants or animals or both, is digested by an anaerobic fermentation, that is less labor, time and space consuming than the conventional aerobic fermentation method, and may be performed with waste that has not to ...


54
John Kelyman: Anaerobic digestion process. Beloit Corporation, Dirk J Veneman, Raymond W Campbell, July 11, 1989: US04846975 (22 worldwide citation)

A process for treating waste material is disclosed wherein the initial steps are performed in the dry stage including the removal of dirt, metallic and glass materials, and separation of the dry materials and thereafter passing the materials through a horizontal rotary pulp separating mechanism whic ...


55
John H Mulholland: Apparatus and method for treating sewage sludge. 456577 Ontario, February 7, 1984: US04429643 (22 worldwide citation)

Sludge is dried in a dryer and burned in a furnace, the dryer being heated by heat from the furnace using a heat exchanger so that contaminants from furnace hot gas do not pass into the dryer. Gas given off from the dryer is in part mixed with fresh air and circulated back to the dryer, and is in pa ...


56
De Baere Luc: Process and installation for anaerobic digestion.. Acec, January 16, 1985: EP0131319-A1 (21 worldwide citation)

Dans un procédé de traitement de matières organiques comprenant une phase de préparation dans laquelle des matières organiques à digérer sont mélangées avec un inoculant approprié et introduit dans un digesteur anaérobie (6), les matières organiques sont mélangées à l'inoculant dans un mélangeur (3) ...


57
Donald L Klass, Sambhunath Ghosh, John R Conrad: Anaerobic digestion with liberated enzyme biomass fractions. Institute of Gas Technology, Dominik Knechtel Godula & Demeur, November 30, 1976: US03994780 (21 worldwide citation)

An improved anaerobic digestion of organic biomass by rupturing cells of microorganisms present in a digested biomass or untreated biomass fraction undergoing digestion to obtain a treated biomass fraction having liberated indigenous enzymes in place; and contacting such treated biomass fraction wit ...


58
Amirali G Rehmat, Anthony L Lee, Michael C Mensinger, Anil Goyal, S Peter Barone: Conversion of sewage sludge into electric power. Endesco Clean Harbors L L C, Mark E Fejer, June 25, 2002: US06410283 (21 worldwide citation)

A method for generating electricity in which sludge is anaerobically digested to form a gas mixture of methane and carbon dioxide and a residue of digested sludge. Water is removed from the digested sludge to form dewatered sludge, which, in turn, is gasified to form a gaseous composition which incl ...


59
Paul B Trost: Use of propane as stripper gas in anaerobic digestion of wastewaters. Dorr Carson Sloan & Birney P C, July 29, 1997: US05651890 (19 worldwide citation)

Anaerobic digestion of wastewaters can be made more effective by introducing propane gas from an external source therein in order that the propane gas strips gas produced by the anaerobic digestion (e.g., methane, carbon dioxide, etc.) from the biomass system.


60
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 ...