Experts on Tour - Howard L. Chesneau

Facts and Myths - Microbial Influenced Corrosion Causes, Effects, Cures & Detection Methods
With changes in fuel chemistry (lead removal, etc.) and fuel distribution today's fuels have become increasingly susceptible to microbial attach. The failure to remove all the water from fuel storage systems makes the task daunting if not impossible to prevent microbial attack from occurring. High humidity, varying fuel supplies and tank configuration all play a role in contributing to this costly problem. Increasing use of biodiesel and ethanol fuels have created additional challenges.

Microbiologicals can cause contamination of fuel filters leading to filter plugging, fouling of fuel injectors, and erratic or inaccurate fuel level readings. While the system may see debris, it is the corrosive nature of these biologicals that pose the most threat to the bottom line. Biologicals alter many aspects of fuel they are largely ignored until there is an occurrence that demands immediate attention.

Acid producing bacteria etch tank surfaces creating corrosion pits. The enzyme hydrogenase scavenges hydrogen ions that would otherwise passivate the electron flow at the corrosion cell's cathode. Anaerobic bacteria, including SRB's and others, use hydrogenase in their energy metabolism processes.

This presentation will discuss Facts and Myths of Microbial Contamination in Fuel systems and the microbiological problems as related to fuel and fuel systems: the causes, the effects, the cures and early detection methods. As well as the myth the E-10 (ethanol at 10%) will not be susceptible to biological attack.

Biodiesel: The Cold Hard Facts of Microbiological Contamination
Microbiological growth in Middle Distillate fuel systems has been known for many years. The problem is directly associated with fuel systems contaminated with water. Even the airlines, whose strict control over fuel system contamination is the standard, have to deal with biological contamination because of water intrusion into their systems.

Biodiesel, whether in neat form (B100) or blends (B20, B5, B2) is even more susceptible to this type of contamination. It is like adding steak sauce to a good steak to enhance the flavor, the microbes love it. Where there's water there's life. Other contaminants such as materials incompatibility (Copper and Zinc) can create problems. Biodiesel is a solvent and can cause premature filter plugging when introduced to fuel systems previously used with other fuels.

This discussion will focus on dealing with Biodiesel as it pertains to microbial contaminant susceptibility, and the steps necessary to detect biological attack and recommendations for remediation.

Howard Chesneau is the President of Fuel quality Services, Inc. Mr. Chesneau is a graduate of the University of Florida. His experience in fuel additives, microbial detection, distillate fuel problems, fuel filtration and tank remediation extends over 30 years. Mr. Chesneau has extensive knowledge and field experience of microbial contamination and detection.

Mr. Chesneau is an active member of numerous professional organizations and associations. Mr. Chesneau is on the IASH Board of Directors (International Association for Stability, Handling, and Use of Liquid Fuels, Inc.). Mr. Chesneau is currently a member of the IATA (International Aviation Transportation Association) Working Group on Microbial Contamination. He currently serves on the ASTM D2 Section E committees dealing with fuel from middle distillates to heavy oil. He is on the ASTM D2 Committee for establishing the specifications for Biodiesel. He served as editor for the ASTM, STP 1005 "Distillate Fuel Contamination, Storage, and Handling". Mr. Chesneau is the author of the section "Remediation Techniques", in ASTM Manual 47 titled "Fuel and Fuel System Microbiology: fundamentals, diagnosis, and contamination control", June 2003. He is the Past Chairman of the local Atlanta SAE section. Since 1983, Mr. Chesneau continues to be an active member of the International Association for "Stability and Handling of Liquid Fuels". Mr. Chesneau has authored and co-authored many articles on the subject of fuel storage and handling which have been published in various trade magazines.

Contingent on available dates.

Equipment needs:
LCD projection equipment for use with laptop.