51
Chris E Choate, Paul A Sherman, Ruihong Zhang: Process for treatment of organic waste materials. Alta Environmental Services, Carr & Ferrell, March 21, 2006: US07015028 (14 worldwide citation)

A multi-stage process and system for treating organic waste materials includes steps of hydrolyzing the materials in an anaerobic vessel, transferring the liquid product of hydrolysis to an anaerobic digester, and further decomposing the waste materials under aerobic conditions to yield a compost pr ...


52
Hoffmann Manfred Prof Dr, Zuerl Berthold, Linke Bernd Dr Sc Agr Dipl Ing, Schelle Hannelore Dipl Biochem: Method and device for the methanation of biomasses. Hoffmann Manfred Prof Dr, Inst Agrartechnik Bornim E V A, August 11, 1999: EP0934998-A2 (14 worldwide citation)

The biomass (3) in e.g. a bale, heaps, pressed sheet bale (4), silo or off-roll container is contained in an air tight envelope (5), and dosed (7, 8) once only with inoculant. Fermentation proceeds anaerobically with no further addition. An Independent claim is included for the equipment used. Prefe ...


53
Don Churchill Augenstein, John Rudiger Benemann, Ramin Yazdani: Landfill design and method for improved landfill gas capture. Institute for Environmental Management, Hugh McTavish, November 11, 2008: US07448828 (13 worldwide citation)

The invention provides an improved method of collecting biogas from a landfill that results in more complete collection of biogas produced in the landfill, and with less contamination with air. The method involves providing the landfill with an upper gas containment layer near the surface of the lan ...


54
Ruihong Zhang: Anaerobic phased solids digester for biogas production from organic solid wastes. The Regents of the University of California, Morgan Lewis & Bockius, Jeffry S Mann, Todd W Esker, July 7, 2009: US07556737 (13 worldwide citation)

The present invention provides methods for the generation of methane by a two phase anaerobic phase system (APS) digestion of organic substrates. Also provided is a device for practicing the methods of the invention. The APS-digester system is a space-efficient, high-rate solids digestion system. Th ...


55
Tomioka Takafumi, Abe Toshiyuki, Sakai Toru, Mano Hiroshi, Okabe Kazuhiro: Method for separating methane, methane separator and methane utilization system. Taiyo Nippon Sanso, Research Institute Of Innovative Technology For The Earth, November 15, 2007: JP2007-297605 (13 worldwide citation)

PROBLEM TO BE SOLVED: To provide a method for separating methane which can be used for highly efficiently separating and refining methane from a biogas containing high concentration carbon dioxide, a methane separator and a methane utilization system using the method.SOLUTION: This method comprises ...


56
John D Offerman, Delman R Hogen, Jeffrey W Lighthart, Hugh McTavish: Ethanol production from biological wastes. Novus Energy, Cyr & Associates P A, December 18, 2007: US07309592 (12 worldwide citation)

The invention provides methods, apparatuses, and kits for producing ethanol and other alcohols. The methods involve fermenting organic material in a fermentation mixture to a biogas comprising methane; converting at least a portion of the biogas to synthesis gas comprising CO and H2; and contacting ...


57
Soheil Alizadeh Khiavi, Jeff Alvaji, Christopher R McLean: Low energy, high recovery, rapid cycle kinetic PSA for biogas. Air Products and Chemicals, Eric J Schaal, June 25, 2013: US08470395 (12 worldwide citation)

Disclosed herein are embodiments of a rotary gas separation device, such as a rotary pressure swing adsorption device. The rotary pressure swing device can include, for example, a rotor with a plurality of adsorber elements, a stator with a plurality of conduits, and a rotary valve comprising a seal ...


58
Sarah L Billington, Craig S Criddle, Curtis W Frank, Margaret C Morse, Sarah J Christian, Allison J Pieja: Bacterial poly(hydroxy alkanoate) polymer and natural fiber composites. The Board of Trustees of the Leland Stanford Junior University, Lumen Patent Firm, February 15, 2011: US07887893 (12 worldwide citation)

A biocomposite is produced from natural fiber fabrics embedded in a matrix of biosynthetic polyhydroxy-alkanoate (PHA) polymers. The PHA is synthesized using aerobic microbial biosynthesis using mixed bacterial cultures and a feedstock containing anaerobic degradation products such as methane and vo ...


59
Dobelmann Jan Kai: Waste water purification process. Dobelmann Jan Kai, October 6, 1999: EP0946432-A1 (12 worldwide citation)

In a waste water purification process, the biomass produced in the second stage, a vegetable clarification plant, is added to the waste water before a first anaerobic treatment stage. The organic contamination of the waste water is thus increased up to a sufficiently high level for anaerobic methane ...


60
Miyamoto Hiroshi, Maruyama Tomohiro: System for treating and utilizing biomass and method for treating and utilizing biomass gas. Kobelco Eco Solutions, February 9, 2006: JP2006-036849 (12 worldwide citation)

PROBLEM TO BE SOLVED: To provide a system for treating and utilizing biomass in which the concentration of impurity gas such as CO2, H2S and steam (H2O) is reduced and biogas having high CH4 concentration can be fed.SOLUTION: The system for treating and utilizing biomass is equipped with a digestion ...