61
Douglas R Casella: Systems and methods for treating landfill gas using landfill leachate. Casella Waste Systems, Wilmer Cutler Pickering Hale and Dorr, October 16, 2012: US08287625 (4 worldwide citation)

Embodiments of the present invention are directed to systems and methods for treating landfill gas using landfill leachate. In one embodiment of the present invention, a method includes receiving landfill leachate from at least one of a plurality of sources, and pretreating the landfill leachate to ...


62
Stefan Stamoulis: Tool for enhancing the extraction of landfill gas. Boulware & Valoir, November 1, 2011: US08047276 (4 worldwide citation)

An apparatus and method to internally provide apertures inside polyvinyl chloride (PVC), high density polyethylene (HDPE), or any polymeric pie, plastic pipe-riser (blank casing) in existing landfill gas recovery wells (extraction wells) that have been installed at Municipal Solid Waste Facilities a ...


63
Nazim Z Muradov, Franklyn Smith, Ali Tabatabaie Raissi: Process for hydrogen production via integrated processing of landfill gas and biomass. University of Central Florida Research Foundation, Brian S Steinberger, Joyce Morlin, Law Offices of Brian S Steinberger P A, April 6, 2010: US07691182 (4 worldwide citation)

Hydrogen production is provided via integrated closed-loop processing of landfill gas (LFG) and solid biomass feedstocks such as various agricultural wastes with minimal environmental impact. LFG is purified of harmful contaminants over a bed of activated charcoal (AC) and is catalytically reformed ...


64
Raymond Seegers, Steve Meyer: In-situ landfill gas well perforation method and apparatus. Waste Management, McDonnell Boehnen Hulbert & Berhgoff, June 17, 2008: US07387163 (4 worldwide citation)

The present invention relates to a method and apparatus for perforating a landfill gas well in situ. The invention allows for improved recovery of gas from a gas well without the danger of explosion.


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GIBSON DAVID: [en] Process for the manufacture of town gas from landfill gas. JOHNSON MATTHEY, June 30, 2010: GB2466554-A (4 worldwide citation)

[en] A process for the manufacture of town gas from landfill gas comprises the steps of (a) recovering a landfill gas from a landfill site, (b) removing contaminants and water from the landfill gas and adjusting the carbon dioxide level in the resulting landfill gas to give a purified mixed gas stre ...


66
Ronald L Brookshire, Travis Brookshire: Flow metering device for landfill gas extraction well. Landfill Gas & Environmental Products, John L Rogitz, October 5, 2004: US06799477 (4 worldwide citation)

A coupling having an integral orifice plate engages upstream and downstream segments of a landfill piping system. Upstream and downstream ports are respectively formed through the walls of the coupling adjacent the orifice plate. The difference in pressure at the ports is correlated to a flow rate t ...


67
Floyd E Farha: Sulfur removal using ferrous carbonate absorbent. New Technology Ventures, Locke Lord Bissell & Liddell, May 17, 2011: US07943105 (3 worldwide citation)

Finely divided ferrous carbonate absorbent, siderite granules or absorbent particles made by mixing, agglomerating and shaping finely powdered ferrous carbonate, preferably siderite, in combination with minor effective amounts of water or an optional binder, followed by drying, are used to treat and ...


68
Stefan Stamoulis: Method for extracting landfill gas. Boulware & Valoir, March 19, 2013: US08398335 (3 worldwide citation)

An apparatus and method to internally provide apertures inside polyvinyl chloride (PVC), high density polyethylene (HDPE), or any polymeric pie, plastic pipe-riser (blank casing) in existing landfill gas recovery wells (extraction wells) that have been installed at Municipal Solid Waste Facilities a ...


69
David L Hansen: Self ignited landfill gas vent flare and flarehead. Landfill Technologies, Heslin & Rothenberg P C, September 28, 1999: US05957681 (3 worldwide citation)

A landfill gas vent flare is provided which includes a flarehead disposed in communication with a landfill gas vent wherein landfill gas is permitted to flow therethrough. A spark plug is located on the flarehead and is electrically connected to a solar powered ignitor which provides electrical impu ...


70
Joseph A Silva, John Scalone, Jeffrey E Silva, Thomas L Moore: Biogas fuel conditioning system. Bio Spark, September 1, 2009: US07582140 (3 worldwide citation)

A biogas treatment system removes moisture and other unwanted materials from biogas originating, for example, with a landfill or anaerobic digester. Water and other unwanted materials are thus removed from landfill gas and waste water biogas, while the gas temperature is controlled to a usable level ...