TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: The number of saprogenic bacteria is decreased by high temperature autoclaving, intermittent sterilization, boiling, pasteurization, electromagnetic wave disinfection, disinfection by applying voltage to tank containing target substance, high pressure disinfection, acid, alkali, salt or oxidizing agent. The disinfection method involves applying voltage to the tank (applying voltage between both anode and cathode when target substance exists in the tank). The voltage is applied only when the target substance exists. The disinfection by applying voltage involves crushing the solid substance contained in the organic compound using shock wave generated by the applied voltage, and homogenizing the organic compound. The oxidizing agent contains active oxygen and/or ozone. The method further involves increasing low molecular substance content in the organic compound using photosynthetic autotrophs, chemoautotrophs or fungi. The method further involves removing and emitting hydrogen sulfide, ammonia and/or organic gas originated in the saprogenic bacteria. The method further involves fixing ammonium ion in the organic compound using microbiological method and/or chemical method. The microorganisms used for the microbiological method are photosynthetic bacteria having nitrogen assimilation activity. The method further involves decomposing the organic compound using enzymes derived from Aspergillus. The method further involves decreasing ammonia content by oxidizing ammonia in the organic compound by ammonia oxidizing microorganism, nitrifying using nitrous acid oxidizing bacteria, and releasing nitrogen to the external field by the effect of nitrate-reducing bacteria with respect to the nitrified substance using fungi having nitrogen-metabolism ability by all or a portion of the oxidation reduction path of the organic compound. The method involves performing ethanol fermentation under aerobic or anaerobic conditions using fungi having alcohol productivity, Zymomonas or heterotypic lactic acid bacteria, obtaining fertilizer precursor, extracting ethanol, performing methane fermentation using anaerobic microorganism, obtaining fertilizer precursor and extracting methane from organic compound. The method involves repeating the process of obtaining fertilizer after ethanol fermentation and methane fermentation one or more times. The process of obtaining fertilizer precursor after ethanol fermentation and methane fermentation are performed simultaneously within the same tank. The ethanol and/or methane are extracted while obtaining organic compound by decomposing the fertilizer precursor under aerobic or anaerobic conditions using microorganisms. The method further involves performing methane extraction while obtaining organic compound from inorganic substance by assimilation of microorganisms. The method involves performing the above steps simultaneously within the same tank. The fungi used in ethanol fermentation is yeast or Rhizopus oryzae. The process of obtaining fertilizer after ethanol fermentation involves using aerobic microorganisms. The microorganisms used for methane fermentation are photosynthetic bacteria, Azotobacter, yeast, nitrate-reducing bacteria or nitrite-reducing bacteria. The fertilizer is obtained from fertilizer precursor using microorganisms. Preferred Components: The fertilizer precursor includes carbohydrate, lipid, glycerin, higher alcohol, fatty acid, amino acid, peptide or protein.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic substance includes ammonia, nitrogen compound, carbon compound, phosphoric acid, sulfide, inorganic acid, inorganic alkali or mineral salt. ACTIVITY - Fertilizer. No biological data given.    MECHANISM OF ACTION - None given.    EXAMPLE - No suitable example given.