Accession Number:

AD0612792

Title:

MECHANISM OF MICROBIOLOGICAL CONTAMINATION OF JET FUEL AND DEVELOPMENT OF TECHNIQUES FOR DETECTION OF MICROBIOLOGICAL CONTAMINATION

Descriptive Note:

Quarterly progress rept. no. 5, 1 Jun-1 Sep 1964

Corporate Author:

MELPAR FALLS CHURCH VA

Personal Author(s):

• Blanchard, Gordon C.
• Goucher, Charles R.

Report Date:

1965-03-01

Pagination or Media Count:

50.0

Abstract:

This study is concerned with the detection of microorganisms in fuel- water environments and with the mechanisms by which these microorganisms cause problems in fuel systems of aircraft. Fuel isolates removed nitrate from growth medium containing iron and calcium, causing it to become more corrosive to aluminum alloys. Upon prolonged incubation 200 days fuel isolates produced substances corrosive to aluminum alloys. Microbial sludge, which can cause corrosion, contained N, C, H, and O. Nitrate did not prevent corrosion caused by nitrated phenols and nitrate does not prevent corrosion caused by media in which fuel isolates have gown for long periods of time. Emulsion-forming organisms contained considerably more lipid material than fuel isolates which were sedimentable in water. Some fuel additives were observed to support the growth of fuel isolates while most anti-icing and metal deactivators were mildly toxic. Respiratory inhibition and ability to kill fuel isolates was demonstrated for pentene, hexene, heptene, octene, and nonene but not for decene or dodecene. The saturated homologs of these compounds were either innocuous or supported growth.

Descriptors:

• *ALUMINUM ALLOYS
• *JET ENGINE FUELS
• *FUEL CONTAMINATION
• FUEL SYSTEMS
• CORROSION
• DEGRADATION
• TOXICITY
• LIPIDS
• CORROSION INHIBITION
• METAL COATINGS
• BIOLOGICAL CONTAMINATION
• OXIDATION
• HYDROCARBONS
• PHENOLS
• ANTIOXIDANTS
• MICROORGANISMS
• NITRATES
• DEICING MATERIALS
• CULTURE MEDIA
• FUEL ADDITIVES

Subject Categories:

• Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE