The ultrasonic destruction of microorganisms in shipboard fuel systems


  1. McConville, K.M.V.
Corporate Authors
Aastra Aerospace Inc, Downsview ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Microbiological contamination of marine diesel presents an expensive problem for naval operations due to the blockage of filters and nozzles, and the ultimate destruction of the turbine blades. Despite the current use of biocides and the full time use of personnel to replace filters, the contamination problem has led to millions of dollars of equipment damage. Through the support of DREA, Aastra has assessed the feasibility of ultrasonic destruction of microorganisms in marine diesel fuel. This approach to microbiological control represents an environmentally friendly and efficient alternative to the use of biocides. Two different ultrasonic devices were used in this study. The microorganisms most commonly found in marine diesel were identified and inoculation tests were performed. Results showed that processing in each apparatus can reduce the microbiological contamination levels of marine diesel for both aerobic and anaerobic bacteria, yeast and mold by up to 3 orders of magnitude. Laboratory grown microbial mats were effectively dispersed, and microorganism viability was destroyed. Aastra has proposed that the concepts demonstrated through this work could be developed into a full scale treatment system.
Report Number
DREA-NAMT-95-2-PAP-6 — CONTAINED IN 99-00779
Date of publication
30 May 1995
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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