FOG Discharge Tank Selection

Storing FOG Discharge? Start Here

If you're dealing with FOG discharge—fats, oils, and grease from shipboard galleys or dockside operations—you need a reliable storage solution. These waste streams are common in cruise lines, at-sea processors, and ferry services, and they require careful handling due to their complex mix of organic materials and cleaning chemicals. Typically, FOG discharge is stored in tanks ranging from 200 to 3,000 gallons, often made of HDPE or XLPE, before being processed through grease traps and other treatment systems.

Can you store it in a poly tank?

Yes, FOG discharge can be stored in HDPE or XLPE rotomolded tanks. These materials are suitable for ambient and warm galley reception, though XLPE is preferred for sustained warm service.

Key Issue: Temperature Management

FOG discharge often involves elevated temperatures, especially from galley operations. While HDPE tanks are adequate for ambient conditions, XLPE tanks are recommended for temperatures up to 140°F to ensure durability and safety.

The safety that actually matters

• Ensure tanks are rated for the specific temperature range of your FOG discharge.
• Use suitable gaskets like EPDM or Viton for effective sealing.
• Regularly inspect tanks for any signs of wear or damage.

Common questions

What size tank do I need?

It depends on your operation's daily discharge volume. Common sizes range from 200 to 3,000 gallons.

Can I use a metal tank?

316L stainless steel is an option for wetted parts, but poly tanks are more common for bulk storage due to cost-effectiveness.

What about gasket materials?

Match gaskets to the manufacturer chart, but EPDM and Viton are generally recommended for FOG service.