枝孢霉菌生长规律及对喷气燃料性质的影响

为探讨特征真菌对喷气燃料性质的影响,构建了培养液和喷气燃料培养体系,每4 h检测培养体系水相中枝孢霉菌的发光强度;每24 h检测燃料相中喷气燃料的总酸值、表面张力、水分离等级、银片腐蚀等级以及水相pH等理化指标,分别以时间和发光强度为横、纵坐标绘制生长曲线,测定喷气燃料总酸值、表面张力等指标的变化规律。结果表明:特征真菌的生长繁殖会增大喷气燃料的总酸值,降低喷气燃料表面张力和溶解水的pH,影响喷气燃料的腐蚀性和洁净性;水相发光强度达到400 RLU/mL时,枝孢霉菌开始对数繁殖,喷气燃料下部样品被重度污染。

GROWTH LAW OF Cladosporium AND ITS EFFECT ON PROPERTIES OF JET FUEL

To investigate the effect of characteristic fungi on jet fuel properties of jet fuel, a culture medium and a jet fuel culture system were constructed. The luminescence intensity in the aqueous phase was detected every 4 hours, and the physical and chemical indicators such as total acid number, surface tension, water separation grade, silver corrosion grade and pH value of jet fuel, was detected every 24 hours. The growth curves were plotted with time; luminescence intensity and the change of total acid number and surface tension of jet fuel were obtained. The results showed that the growth and reproduction of characteristic fungi increased the total acid value of jet fuel, while decreased the surface tension of jet fuel and lowered the pH value of dissolved water, and affected the corrosiveness and cleanliness of jet fuel. Cladosporium began to proliferate logarithmically and the bottom of the jet fuel was heavily contaminated when the luminescence intensity in the water phase reached 400 RLU/mL.