DDGS

DDGS Drying

DDGS drying combines the wet cake from grain distillery centrifuges with concentrated thin stillage syrup and dries the mixture into distillers dried grains with solubles. The result is a traded protein feed for cattle, poultry and fish. Grain-based ethanol plants dry it because wet distillers grains spoil within days and travel poorly.

Quick answer

To dry DDGS, GEM recommends the Rotary Tube Bundle Dryer and Rotary Dryer. Typical moisture is 55–65% in the feed and 10–12% after drying. Direct / Indirect Rotary Dryer is used when the feed or site calls for it. Every project starts with a pilot trial on your own sample.

1998established112+installations7countriesDried & Testedin-house pilot trialsCertifications · Case studies
The challenge

What makes DDGS hard to dry

  • Syrup addition makes the mixture very sticky, so dried product is usually back-mixed with wet feed to avoid build-up.
  • Overheating darkens the grains and lowers lysine availability, which feed buyers check through colour and digestibility tests.
  • Fine particles and oil content create dust explosion and fire risk in the dryer and conveying system.
  • Distillery throughput is continuous, so the dryer must match round-the-clock output without stoppages.
How GEM dries it

The right dryer for DDGS

Steam-tube rotary dryers suit DDGS because they use distillery steam, keep product away from flame and limit colour damage. Direct rotary dryers handle high tonnages where fuel is cheap; a direct/indirect rotary gives flexibility where steam supply varies.

Typical feed moisture55–65%
Typical target moisture10–12%
Recommended dryerRotary Tube Bundle Dryer, Rotary Dryer
AlternativesDirect / Indirect Rotary Dryer
Application areaPomace, Pulp & By-products
IndustriesAnimal Feed, Breweries & Distilleries
The value

What drying DDGS unlocks

Drying converts a perishable co-product into a storable feed commodity sold across regions, often a meaningful share of distillery revenue. Plants without drying depend on nearby livestock buyers and face disposal risk when demand drops.

Dried DDGS becomes

  • Cattle and dairy feed protein
  • Poultry and swine feed ingredient
  • Aquafeed protein source
For buyers

Buying a DDGS dryer?

Plants searching for a DDGS dryer or comparing a distillers grains drying plant usually need three answers: which dryer fits, what it costs to run, and how fast it pays back. For DDGS, we start from your throughput, current moisture (typically 55–65%) and the target (10–12%), trial a sample on the Rotary Tube Bundle Dryer, and return a sized recommendation with a budget quotation for your animal feed operation.

FAQ

DDGS: questions buyers ask

Why is dry DDGS mixed back into wet feed?
Wet cake and syrup together are too sticky to dry directly. Back-mixing dry product raises the solids content of the feed so it flows and dries evenly without sticking to the dryer.
What colour should well-dried DDGS have?
A light golden colour usually indicates gentle drying and good protein quality. Dark brown DDGS points to overheating and reduced amino acid availability, which can lower its price.

Send us a sample. See it dried.

We trial your material in our pilot facility before any equipment decision, then size the dryer from real data.

  1. Tell us the material, moisture and throughput.
  2. An engineer confirms the trial plan and sample shipping.
  3. You get drying data and a sized recommendation with a budget quotation.

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