特征真菌对喷气燃料性质的影响

为探索喷气燃料中微生物污染对喷气燃料性质的影响，构建了以喷气燃料为唯一碳源的混合特征真菌培养体系，系统研究了喷气燃料特征真菌对喷气燃料外观、总酸值、银片腐蚀、水反应试验以及表面张力等指标的影响，结合三磷酸腺苷(ATP)生物荧光检测法，考察了微生物污染总量与喷气燃料质量指标之间的关系。结果表明：特征真菌在生长繁殖过程中会产生酸性物质和表面活性物质，使喷气燃料酸值上升、表面张力下降，引起喷气燃料外观不符合标准要求，在试验周期内对喷气燃料水反应试验、银片腐蚀等指标无显著影响；当喷气燃料中ATP含量大于5 500 RLU/L时，喷气燃料总酸值超标，导致质量不合格。

INFLUENCE OF CHARACTERISTIC FUNGI ON PROPERTIES OF JET FUEL

In order to investigate the effect of characteristic fungi on jet fuel properties,a mixed characteristic fungi culture system with jet fuel as the sole carbon source was constructed,and the effects of characteristic fungi on jet fuel appearance,total acid value,silver sheet corrosion,water reaction test and surface tension were systematically studied.Combined with ATP bioluminescence detection method,the relationship between total microbial contamination and jet fuel quality index was investigated.The results showed that in the process of growth and reproduction,the characteristic fungi would cause the appearance of jet fuel not to meet the standard requirements,and produced acidic substances and surface active substances,which increase the acid value and decrease the surface tension of jet fuel.It has no significant effect on the water reaction test of jet fuel and the corrosion of silver sheet during the test period.When the ATP content in jet fuel was greater than 5500 RLU/L,the jet fuel would be heavily polluted by microorganisms,causing the total acid value to exceed the standard.