抄録
The efficient management of Marine diesel oil on board stands to gain from knowing the properties of the fungi which have an ability to grow in there. A fungus, which was isolated from the sludge trapped on the element in a strainer for Marine diesel oil, was able to grow in Marine diesel oil alone as well as in the chemically defined medium (CDM), pH 5.6 - 5.8, containing 0.1% glucose, 0.1% ammonium sulfate, and 0.1% potassium dihydrogenphosphate. When the isolate was grown in low oxygen concentrations of 0.5 -1.0% (vol/vol), the growth was repressed strongly in the eutrophic growth medium. In Marine diesel oil, however, the growth repression was not observed in the same oxygen concentrations described above in comparison with that in the aerobic condition. The growth in low oxygen condition seems to be limited by the quantity of the isolate in the medium. The isolate utilized n-tridecane and n-tetradecane as carbon and energy sources in CDM when glucose was replaced by these compounds. The reduction of n-tridecane and n-tetradecane in the CDM was found to be 98.8% and 92.3%, respectively, after 40 days of aerobic incubation, indicating that the isolate can utilize n-paraffms in Marine diesel oils.
