1
Sambhunath Ghosh, Donald L Klass: Two phase anaerobic digestion. Institute of Gas Technology, Dominik Knechtel Godula & Demeur, May 10, 1977: US04022665 (104 worldwide citation)

An improved two phase anaerobic digestion process in which an initial phase continually receives an organic feed for short detention times of less than two days under conditions which efficiently liquefy and breakdown the feed to lower molecular weight acids and other intermediates for conversion to ...


2
Sambhunath Ghosh, Donald L Klass: Methane production from and beneficiation of anaerobic digestion of plant material and organic waste. United Gas Pipe Line Company, Thomas W Speckman, May 11, 1982: US04329428 (42 worldwide citation)

A process for improved methane production resulting in higher yield and higher production rates by anaerobic digestion of a mixture of plant material and organic waste. The process is suitable for production of synthetic natural gas and through anaerobic digestion of a mixture of plant material and ...


3
Sambhunath Ghosh, Donald L Klass: Two phase anaerobic digester system. Institute of Gas Technology, Knechtel Valentino Demeur & Dallas, March 9, 1982: US04318993 (39 worldwide citation)

A two phase anaerobic digestion process in which an initial phase continually receives an organic feed for short detention times of less than two days under conditions which efficiently liquefy and breakdown the feed to lower molecular weight acids and other intermediates for conversion to methane. ...


4
Donald L Klass, Sambhunath Ghosh: Methane production by anaerobic digestion of plant material and organic waste. United Gas Pipe Line Company, Thomas W Speckman, February 23, 1982: US04316961 (34 worldwide citation)

A process for production of methane gas in higher yields and higher rates by thermophilic or mesophilic anaerobic digestion of plant material and/or organic waste in admixture with an extract of different plant material. Increases of methane yield of greater than about 25% and up to about 500% are o ...


5
Donald L Klass, Sambhunath Ghosh: Situ mining of fossil fuel containing inorganic matrices. Institute of Gas Technology, Thomas W Speckman, January 22, 1980: US04184547 (31 worldwide citation)

A process for recovering underground fossil fuel deposits retained in an inorganic matrix wherein the deposit is contacted with an aqueous medium of anaerobic microorganisms for a time sufficient to produce particles of the deposit containing both the organic fossil fuel and inorganic matrix of a si ...


6
Donald L Klass, Sambhunath Ghosh: Methane production from and beneficiation of anaerobic digestion of aquatic plant material. United Gas Pipe Line Company, Thomas W Speckman, January 3, 1984: US04424064 (27 worldwide citation)

A process for improved methane production by anaerobic digestion of aquatic plant material at least a portion or all of which has been grown in organically polluted water. Mixtures of aquatic plant material one portion of which has been grown in non-polluted and a second portion comprising over abou ...


7
Frank L Kester, Robert V Fitzsimmons, Donald L Klass: Stabilized gasoline-alcohol fuel compositions. Institute of Gas Technology, Thomas W Speckman, May 24, 1983: US04384872 (25 worldwide citation)

Motor fuel composition of about 5 to 50 weight percent methanol, ethanol or mixtures thereof in gasoline with a minor amount of a selected surface active agent which significantly increases the water tolerance of the gasoline-alcohol fuel composition. Suitable surface active additive agents include ...


8
Donald L Klass: Method of gas production from geopressurized geothermal brines. Institute of Gas Technology, Jakala Knechtel Valentino Demeur & Dallas, October 16, 1979: US04171017 (22 worldwide citation)

In accordance with the method of the present invention, methane and other similar fuel components are separated from the brine found in geopressurized geothermal zones by immersing gas permeable membranes selective for these fuel components into the brine in these zones, and permitting these fuel co ...


9
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 (20 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 ...


10
Donald L Klass, Carl D Landahl: Gas sweetening by membrane permeation. Institute of Gas Technology, Emrich & Dithmar, December 31, 1985: US04561864 (15 worldwide citation)

A sour gas mixture containing methane gas, hydrogen sulfide and carbon dioxide is applied to a nonhomogenous membrane having a combined separation factor for hydrogen sulfide and carbon dioxide at least about 20. The gas mixture is delivered to the membrane at a Flow Rate Factor on the order of abou ...



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