Yes, Biodiesel is more susceptible to water contamination than petroleum diesel, however, there are effective techniques for preventing water contamination in any fuel system:
- Ensure all tank caps are in place and in good condition
- Keep the tanks full to minimize condensation inside the tank. Get in the habit of filling the tanks at the end of the day so there is no room for condensation to form when the temperatures cools overnight
- Large temperature swings can promote moisture condensation on the inside of storage tanks. Underground storage tanks are best at preventing condensation since fuel is kept at a relatively constant temperature, but underground storage introduces many other potential problems such as leakage and liability. Above ground storage tanks should be double-wall insulated and shaded if possible to moderate temperature swings thereby reducing the possibility of condensation formation
- Drain a small amount of fuel from the bottom of storage tanks every 6 months to remove any water that might have accumulated in the tank
- Avoid prolonged exposure of fuel to light, which can induce algae growth. Fibreglass tanks should be painted and/or placed in shaded areas
- If biological growth is a problem, the same products that are used with petroleum diesel can be used in Biodiesel to ‘dry’ the fuel and clean up biological contaminants.