EP827229-A2  COHEN B: "The Bacterial Culture as an Electrical Half-Cell" JOURNAL OF BACTERIOLOGY ,1931, pages 18-19, XP000863060 Baltimore, MD;  HABERMANN W ET AL: "BIOLOGICAL FUEL CELLS WITH SULPHIDE STORAGE CAPACITY" APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,DE,SPRINGER VERLAG, BERLIN, vol. 35, no. 1, page 128-133 XP000862908 ISSN: 0175-7598;  SUZUKI S ET AL: "APPLICATION OF A BIOCHEMICAL FUEL CELL TO WASTEWATERS" BIOTECHNOLOGY AND BIOENGINEERING SYMPOSIUM,US,NEW YORK, NY, no. 8, 1979, page 501-511 XP000862832 ISSN: 0572-6565;  SUZUKI S ET AL: "BIOCHEMICAL ENERGY CONVERSION USING IMMOBILIZED WHOLE CELLS OF CLOSTRIDIUM BUTYRICUM" BIOCHIMIE,FR,PARIS, vol. 62, no. 5/06, page 353-358 XP000862841 ISSN: 0300-9084US5976719-A  H. P. Bennetto, et al., "The Sucrose Fuel Cell: Efficient Biomass Conversion Using a Microbial Catalyst", Biotechnology Letters, vol. 7, No. 10, 1985, pp. 699-704 No month available.;  R. M. Allen, et al., "Microbial Fuel-Cells", Applied Biochemistry and Biotechnology, vol. 3940, 1993, pp. 27-40 No month available.;  S. D. Roller, et al., "Electron-transfer Coupling in Microbial Fuel Cells: 1. Comparison of Redox-mediator Reduction Rates and Respiratory Rates of Bacteria", J. Chem. Tech. Biotechnol., 1984, pp. 3-12 No month available.;  W. Habermann, et al., "Biological Fuel Cells with Sulphide Storage Capacity", Applied Microbiology Biotechnology, 1991, pp. 128-133 No month available.EP827229-B1  SUZUKI S ET AL: "BIOCHEMICAL ENERGY CONVERSION USING IMMOBILIZED WHOLE CELLS OF CLOSTRIDIUM BUTYRICUM" BIOCHIMIE,FR,PARIS, vol. 62, no. 5/06, page 353-358 XP000862841 ISSN: 0300-9084;  SUZUKI S ET AL: "APPLICATION OF A BIOCHEMICAL FUEL CELL TO WASTEWATERS" BIOTECHNOLOGY AND BIOENGINEERING SYMPOSIUM,US,NEW YORK, NY, no. 8, 1979, page 501-511 XP000862832 ISSN: 0572-6565;  HABERMANN W ET AL: "BIOLOGICAL FUEL CELLS WITH SULPHIDE STORAGE CAPACITY" APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,DE,SPRINGER VERLAG, BERLIN, vol. 35, no. 1, page 128-133 XP000862908 ISSN: 0175-7598;  COHEN B: "The Bacterial Culture as an Electrical Half-Cell" JOURNAL OF BACTERIOLOGY ,1931, pages 18-19, XP000863060 Baltimore, MD;  POTTER M.C.: 'Electrical Effects accompanying the Decomposition of Organic Compounds' PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B vol. 84, 14 September 1911, LONDON, pages 260 - 276;  POTTER M.C.: "Electrical Effects accompanying the Decomposition of Organic Compounds", PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B, vol. 84, 14 September 1911 (1911-09-14), LONDON, pages 260 - 276, XP000863036