NOVELTY - Apparatus for producing useful product, has fermentation apparatus with several processing tanks for decomposing organic waste, air charging system for supplying air with force to the processing tanks and apparatus for deodorizing the gas discharged from each processing tank. The useful product is produced from the organic waste by heat resistant bacterial flora. The deodorizing apparatus has pickling tank, rinse tank and microorganisms deodorizing tank.    USE - The apparatus is useful for producing useful products including fertilizer, feed, and fuel (all claimed) which are used in agricultural and environmental fields.    ADVANTAGE - The apparatus does not release bad odor.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for useful product, which is obtained by performing primary decomposition by decomposing organic waste using heat resistant bacterial flora partially on aerobic conditions, obtaining partial decomposition layer formed in the upper portion of at least one decomposition process tank, stirring, mixing the partial decomposition layer with water, adding into the upper portion of another decomposition process tank, and performing secondary decomposition process by decomposing organic waste which is not decomposed at the primary decomposition process by other heat resistant bacterial flora on aerobic conditions. BIOTECHNOLOGY - Preferred Apparatus: The organic waste is injected into the fermentation apparatus, air is supplied and the organic waste is decomposed by heat resistant bacterial flora. The air in the primary fermentation tank moves horizontally below. The processed material layer is supplied with air and the organic waste which is not decomposed by the heat resistant bacterial flora decomposes. The apparatus has secondary fermentation tank has other heat resistant bacterial flora. The apparatus has conveying apparatus for supplying the processed material layer processed by the primary fermentation tank to the secondary fermentation tank. The substance for controlling moisture content and/or the above-mentioned useful product are added into the primary fermentation tank with the organic waste. BIOLOGY - Preferred Components: The organic waste is chosen from waste material generated by acquisition of the active ingredient of the excretion of an animal, the waste material generated by dissection of an animal, waste material generated by cooking a plant, waste material generated by plant, environmental preservation, and their mixtures. Several tissues and bones of the animal are contained in the waste material generated during the dissection process. Several tissues of the plant are included in the waste material generated by the acquisition of the active ingredient of the plant. The waste material generated by the process for acquisition of the active ingredient of the plant is chosen from leaf of palm coconut, outer layer, outer layer fiber, shell of fruit, cavity, root, and stem. The waste material is obtained by discarding several tissues and bone during dissection of the animal, discarding tissues during cooking process or their mixtures. The waste material generated by the process for acquisition of the active ingredient of the plant, includes tissue discarded in edible processing and cooking, residue generated by oil outlet process or their mixtures. The waste material is generated by performing steam distillation, pressing or extraction of outer layer of the leaf of plant, branch, stem, bark, root, seed, outer layer of fruit, fruit, flower, the bud, stalk or their mixtures. The excretion of the animal is chosen from cattle feces, horse dung, sheep feces, pig feces, reindeer excrement, elephant feces, camel excrement, goat excrement, buffalo excrement, hen droppings, kangaroo excrement, ostrich excrement, scybalum, alligator excrement, and their mixtures. The waste material generated by the process for the environmental preservation is chosen from branch, coppiced timber, bottom grass, weeds of fields which are removed by pruning, and their mixtures. The heat resistant bacterial flora contains several microbes which are propagated at a 50-90 degrees C for utilizing the waste material as a nutrient. The microorganisms deodorizing tank has several layers by which microorganisms are fixed to peat-moss, outer layer fiber of trees, outer shell fiber of the seed of trees, cavity of a seed, or perforated ceramic board. The microorganisms are chosen from 4pgm6 (FERM P-17867), 4pg2 (FERM P-17869), 4pg4 (FERM P-17870), 4pgm2 (FERM P-17865), 4pgm3 (FERM P-17866), 1pg2 (FERM P-17868), and 4pgm8 (FERM P-17871).