Vinasse (Sugarcane + Molasses Ethanol Stillage) Storage

Storing Vinasse? Start Here

Vinasse is a byproduct from ethanol production, especially from sugarcane and molasses. It's a thick, dark liquid that comes out hot and slightly acidic. If you're in the business of ethanol production or using vinasse for fertigation, you need to know how to store it safely. Vinasse is rich in minerals and organic acids, making it both a resource and a challenge to handle.

Can you store it in a poly tank?

Polyethylene tanks can be used for vinasse, but only under certain conditions. They are suitable for storing cooled vinasse at temperatures below 140°F. However, for fresh vinasse straight from the distillation column, which is much hotter, you'll need a stainless steel or epoxy-lined steel tank. Poly tanks are not suitable for these high temperatures.

Temperature is the Key Issue

The main challenge with storing vinasse is its high temperature when it first comes out of the distillation process. This requires tanks that can handle heat. Polyethylene tanks can manage the job once the vinasse has cooled, but for initial storage, you'll need materials that can withstand higher temperatures to avoid damage and ensure safety.

The safety that actually matters

• Ensure tanks are rated for the temperature of the vinasse you are storing.
• Select the right material to prevent corrosion and leaks.
• Regularly inspect tanks for wear and tear, especially if using older installations.

Common questions

Can I use a regular steel tank for vinasse?

Regular steel tanks are not recommended due to corrosion issues; use epoxy-lined or stainless steel instead.

What gaskets should I use?

EPDM gaskets are generally suitable for vinasse storage.

How do I handle scaling issues?

Regular cleaning and maintenance are crucial to manage scaling from minerals in vinasse.