1
Keith A Schimel: Apparatus, system, and process for anaerobic conversion of biomass slurry to energy. Keith A Schimel, Thomas R FitzGerald Esq, December 16, 2003: US06663777 (28 worldwide citation)

An improved digester apparatus converts wet carbonaceous biomass materials to biogas in a digestion unit operating at a controlled temperature and having a concentrator component and a pressure swing component each containing anaerobic bacteria. The apparatus conveys slurried aqueous biomass from a ...


2
Keith A Schimel: Methods for the treatment of organic material and particularly sewage sludge. Martin LuKacher, March 1, 1983: US04375412 (10 worldwide citation)

Anaerobic digestion of organic material, particularly biological sludge, such as sewage sludge, is carried out in a closed system having a first digestion tank and a second concentration and partial digestion tank. The concentrated and partially digested sludge is fed to the first tank where it is m ...


3
Keith A Schimel: Systems for the treatment of organic material and particularly sewage sludge. Martin LuKacher, August 30, 1983: US04401565 (2 worldwide citation)

Anaerobic digestion of organic material, particularly biological sludge, such as sewage sludge, is carried out in a closed system having a first digestion tank and a second concentration and partial digestion tank. The concentrated and partially digested sludge is fed to the first tank where it is m ...


4
Keith A Schimel: Systems for the treatment of organic material and particularly sewage sludge. Martin Lukacher, February 10, 1987: US04642187 (1 worldwide citation)

Anaerobic digestion of organic material, particularly biological sludge, such as sewage sludge, is carried out in a closed system having a first digestion tank and a second concentration and partial digestion tank. The concentrated and partially digested sludge is fed to the first tank where it is m ...


5
Keith A Schimel: Apparatus, system, and process for anaerobic conversion of biomass slurry to energy. Jaeckle Fleischmann & Mugel, September 18, 2003: US20030173291-A1

An improved digester apparatus for converting wet carbonaceous biomass materials to biogas comprises a digestion unit operating at a controlled temperature and having a concentrator component and a pressure swing component each containing anaerobic bacteria; means for conveying slurried aqueous biom ...



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