Lucky,
Ethanol plant here in our town produces fuel ethanol, extracts much of the fat (sold as corn oil), captures much of the CO2(marketing it as dry ice or compressed CO2) and markets wet, modified, and dry distiller's grain co-products to livestock producers.
I agree with what you have posted, as far as you went.
As it was explained to me in baby magic:
Distilleries produce one of two grades of products, one being food grade and one being industrial grade.
And some distilleries produce both food and industrial grade.
The distilleries that produce food grade products the by-produce is safe for both human and animal consumption as they are regulated by the FDA.
The distilleries that produce industrial grade products, the by-produce is NOT safe for both human and animal consumption, as they are NOT regulated by the FDA.
The distilleries that produce both food grade and industrial products, the by-produces are NOT safe for both human and animal consumption, as they are NOT regulated by the FDA in the portion of the plant that produces industrial products.
In a duel product distillery that produces both food grade and industrial products, the processed corn from the food grade portion of the plant, the by-product is conveyed to the industrial grade portion of the plant where sulfur is added to extract the alcohol, making it unregulated by the FDA and the by-product is now unsafe for both human and animal consumption, UNLESS the by-product of the food grade portion of the plant, is sold off at that time and NOT conveyed to the industrial portion of the plant, which would make NO economical sense, because why would you invest in a industrial production plant and NOT use your own by-product from your food grade plant.
So all those plants listed in Ethanol Production Magazine, listing sugar/starch as their platform are actually duel purpose plants producing both food and industrial grade products and the by-product is unsafe for both humans and animals.
IMO, the platform should read: sugar/starch/ethanol.
Liz