Biodiesel Storage

Biodiesel should be visually free of undissolved water, sediment, and suspended matter. Contamination levels in fuel can be reduced by storage in tanks kept free of water, and tankage should have provisions for water draining on a scheduled basis. Water promotes corrosion, and microbiological growth may occur at a fuel-water interface.

Underground storage is preferred to avoid temperature extremes; above ground storage tanks should be sheltered or painted with reflective paint. High storage temperatures accelerate fuel degradation. Fixed roof tanks should be kept full to limit oxygen supply and tank breathing.

To keep diesel fuel tanks clean and free of contamination, the following preventive maintenance should be included at any operation:

• Inspection of storage tanks and stored fuel regularly for dirt, water, and sludge.

• Regular fuel filters replacements.

• Establish fuel sampling and testing program for microorganisms and degradation by products.

• Drain and clean tanks with regular discharge of water bottoms.

• Removal of contaminated diesel fuel from problem areas including sludge and other materials.