TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Microorganism: The microorganism forms circular colonies having smooth convex edges and a glossy appearance. The microorganism exhibits the following characteristics:(a) turbidity in broth liquid culture;(b) a negative result for denitrification reaction, VP test, indole production, nitrate reduction, urease activity, hydrolysis of esculin, gelatin and starch, beta-galactosidase reaction, hemolysis, and formation of hydrogen sulfide;(c) a positive result for MR test, beta-xylosidase activity, utilization of citric acid in Koser and Christensen test, utilization of source of inorganic nitrogen such as sodium nitrate (NaNO3) and ammonium sulfate ((NH4)2SO4), growth at 37 degreesC, 41 degreesC and 44 degreesC;(d) a negative result for growth in anaerobic conditions;(e) a positive result for utility of an organic compound such as D-glucose, L-arabinose, potassium gluconate, N-capric acid, adipic acid, DL-malic acid, sodium citrate, phenyl acetate, DL-sodium lactate, glutaric acid, malonic acid, L-histidine, azelaic acid, L-aspartic acid, L-leucine, L-tyrosine, beta-alanine, ethanol, and L-ornithine;(f) a negative result for utility of an organic compound such as D-mannose, D-mannitol, N-acetyl-D-glucosamine, maltose, L-phenylalanine, histamine, 2,3-butanediol, trans-aconitic acid, L-arginine and DL-4-aminobutyric acid.When the bacteria is provided in O-F culture medium containing saccharides, the results shown for generation of acid/gas are:(i) when the saccharide is L-arabinose, D-xylose, D-glucose, D-mannose, D-fructose or lactose, it shows positive result for generation of acid and negative result for generation of gas; and(ii) when the saccharide is D-galactose, maltose, sucrose, trehalose, D-sorbitol, D-mannitol, inositol, glycerol or starch, it shows negative results for generation of acid and gas.Preferred Method: The fat and oil containing material is processed at a temperature of 15-45 degreesC. SPECIFIC MICROORGANISMS - (I) is Acinetobacter sp. strain SOD-1 having the independent administrative agency industrial technical research institute patent organism deposition center acceptance number FERM P-18378 (claimed).    EXAMPLE - 5 ml of a component containing 6000 ppm salad oil was put in a test tube having a diameter of 18 mm. Acinetobacter strain SOD-1 was added to the component in the test tube and was cultivated at 28 degreesC for 24 hours. The lipolysis activity of the microorganism was measured. The results showed that the microorganism exhibited lipolysis activity and decomposed the fat and oil components in the salad oil.