Bioethanol Distillation

The words of our chancellor still ring in our ears: Until 2020, the share of renewable energies should reach 20% of our total energy demand of fossil fuels.

Bioethanol will take a central role in this process, which is why we’re proud to be able to offer our customers energy saving, highly customized, plug-and-play bioethanol plants – all in accordance with current technological and political trends.

Procedure

Cereal grains are milled under wet conditions, mixed with water and amylase enzymes and then heated up to turn all contained starch to sugar. The then-called mash is infused with yeast, to induce an alcoholic fermentation process of the sugar, after which the ethanol is separated from the fermented mash via distillation process. Lastly, the ethanol-water mix is dehydrated, which yields bioethanol, the final product.

Raw Materials & Products

Base materials can be starchy crops, such as wheat, triticale, rye or corn. Preferred are those with high starch levels, combined with low levels of proteins, for maximum yield.

A byproduct, produced next to the high quality bioethanol, is the slop, which can be drained from the sump of the distillation column and then processed into high-grade animal feed, both in fresh and dried, stable form (Distiller’s dried grains with solubles – DDGS).

It is also possible to use the slop as a substrate for biogas plants.

Components

 

Necessary components for the production of bioethanol start with sufficient storage space in form of a grain silo.

 

Pre-installed screw conveyors and dosing screws make it very easy to feed the grain to the production process. Once infused with enzymes, the wet milling of the grain can then be taken care of with a hammer mill, for example.

 

After adding yeast, the mash is then stored in fermentation tanks and consistently kept warm with field-tube heat exchangers, before being transferred to the distillation or rectification column.

 

The final dehydration of the industrial alcohol is conducted with a dehydration plant, before the end product is measured, tested and evaluated upstream.

 

Further parts include ethanol storage tanks, cooling tower systems for process water treatment and potentially a decantation mechanism for further processing of the slop.

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You work in agriculture?

You’d like to learn more about the economical production of bioethanol?

For more information about bioethanol plants or their individual components, contact us!

  • How do you imagine your project? Very important for us to know the size of the plant, the desired end product and the land where the plant is installed.