Feedstocks for bioethanol production
Plants store energy in the form of sugar or starch. Bioethanol as a fuel makes this energy available again.
Basically alcohol, bioethanol is made from sugar (glucose) which comes from sugar crops or is utilized from starch crops. Cellulose is a further possible source, yet with technical issues in large-scale conversion still to overcome, cellulose-based feedstocks are referred to as second generation (2G).
The choice of feedstock is a matter of climate, for example sugar cane is used in tropical zones, wheat is favored in Europe and corn is typical for North America.
Bioethanol facilities often are linked to sugar or starch factories and use the by-products and residues from that industry as substrates (in the form of molasses, starch hydrolysate a.s.o.).
As only the sugar respectively starch is needed for the process, the remaining ingredients of the raw material in turn can provide valuable co-products. The proteins, minerals, fat and fiber contained in grain make a high-quality economical animal feed known as DDGS. Some 30 % of the raw material input can be recycled to the food chain as a soya substitute in animal husbandry.
The concentrated stillage from (sugar) molasses is used also as animal food additive, as fertilizer, or it can be incinerated to generate energy for the plant.
Read about Bioethanol process
Read about 2G | Second generation
Read about Planning a bioethanol plant
VOGELBUSCH Biocommodities GmbH
EU Grain Consumption
Measured by the volume available in the European Union, the proportion of cereals to produce bioethanol is marginal.
World Grain Consumption
On a global basis the consumption of grain for bioethanol production is stable at 6%.