DDGS Dryer Plant
Drying equipment for the co-product stream from grain-based distilleries. ATTOMO can review the wet feed, required moisture and plant interfaces to define an appropriate DDGS drying package.
Process and equipment approach
In grain-based ethanol production, stillage separation produces wet distillers grains and thin stillage. Concentration of the thin stillage and blending of solubles with the wet grains can precede drying to DDGS. Feed properties, heat sensitivity and emissions requirements determine the suitable drying arrangement.
Applications and product requirements
DDGS means dried distillers grains with solubles, a co-product associated with grain-ethanol processing. Its suitability for animal feed depends on the actual composition and quality specification. DDGS recovery applies to grain-derived co-products; molasses spent wash requires a different treatment route.
Equipment and operating approach
In a typical dry-grind grain process, separation of whole stillage produces wet grains and a liquid stream. Concentrated solubles may be recombined with wet grains before drying, according to the co-product design. The dryer removes moisture; upstream separation and evaporation determine the dryer feed and heat load.
Define the right package.
The quotation defines the included equipment, services and battery limits.
- Wet-feed handling and dryer equipment
- Solubles integration where specified
- Product discharge and exhaust-treatment interfaces
- Instrumentation, controls and utility connections
Materials and configuration
The package may include a selected dryer, feed distribution, product discharge, vapour or exhaust interfaces and controls. Mixing, conveying, cooling and storage need separate boundaries. Abrasion, deposits, cleaning access and contact materials are assessed against the actual wet-grain mixture. A spray dryer is not interchangeable with a dryer designed for wet grains.
Utilities and operation
The enquiry should state wet-feed rate, inlet and final moisture on a wet or dry basis, solids characteristics and available heating medium. Heat exposure can affect product quality. Dust, odour and fire risks require assessment; the final utility demand and safeguards depend on the chosen drying arrangement.
Information for your enquiry.
Share the information you already have. Early-stage enquiries are welcome.
- Wet feed rate, composition and moisture
- Required product moisture and quality
- Available heat source and utility conditions
- Dust characteristics and emissions requirements
Frequently asked questions
Can one dryer be selected from throughput alone?
No. Moisture removal, feed behaviour, product quality, heat source and exhaust conditions all affect selection and sizing.
Is DDGS the same as molasses spent wash?
No. DDGS is associated with grain-based distillery co-products. Molasses-based stillage has different characteristics and requires its own treatment basis.
Why does the quantity of added solubles matter?
It changes feed moisture, stickiness, composition and evaporation duty. The dryer must be sized for the agreed wet-grain and solubles mixture.
Can dryer capacity be specified only in tonnes per day?
State whether this is wet feed, dried product or water evaporated, together with the moisture basis. These are different ratings.
Does drying alone make the product suitable for animal feed?
No. Composition, contaminants, storage stability and the relevant feed specification need assessment and testing alongside moisture.