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September 16, 2006

Comments

Cervus

These are some major improvements. Not only does it produce more ethanol, but the energy inputs used to produce it are much less. It seems like it means a significant improvment in energy balance as well. Well done.

EtOH Op

Maybe the "professor and his research assitant" ought to "do a little research!" The technique that is refered to in the article, has been in use for a decade or so! Today's modern dry-mill plants use 60% less energy than 15 years ago, there is NO waste water {all water is recycled}, and the fermentation yield is mostly in excess of the 2.9 {Gallon per Bushel} yield!

Most of the published articles about ethanol have a three year, to a decade, "lag time!" The utilized ethanol technology, is far ahead of "public knowledge!"

Li-Fu Chen

The dry milling method produces DDG that is the main source of air pollution. In wet milling, DDG is not produced. Instead, germ (for corn oil), gluten meal, and gluten feed are generated. Wet milling involves a sulfur dioxide steeping process in order to obtain these co-products. Sulfur dioxide has an unpleasant odor that causes a serious air pollution problem. The new process does not produce DDG as that in dry milling. It produces food-grade co-products (corn oil, zein, gluten meal, and corn fiber) without steeping corns as that in wet milling method.

EtOH

"The dry milling method produces DDG that is the main source of air pollution."

I don't know where you get your data, but DDG {and the process that makes it} does not produce air pollution! Particulates {dust, moisture, Nox, CO} are burned up in the thermal oxidizer. Even modern wet mills must run a T.O. to control pollutants/paticulants/emissions.

Also, corn oil can be produced {can be seperated from "thin-stillage/syrup"} at a dry milling operation {as is currently being done in some plants}, but that is not always feasible {market share}. And, the WDG/DDG is a high demand, high protein, livestock/poultry feed. The article makes it appear as though DDG is a waste of product. DDG/WDG is a very marketable product!

The article seems to postulate that the co-products would be better utilized as "food grade" products. This is not necessarily the case. There is a definite demand for livestock/poultry feed. And, it does not involve being in the proximity of the facility that processes/utilizes meal gluten and corn oil. The wetmeal {gluten, zein} cannot be stored, or transported a long distance. Because of spoilage issues. And marketplace demand is not always available. A close proximity to a meal processor would be necessary to warrant producing gluten and zein. Transportation has to be factored into the co-product viability!

And you haven't even addressed the "wastewater issue" {assertions}, or the lack thereof, at a modern dry mill!

Meyer

What is the current wastewater (stillage) flow rate from the ethanol production portion of wet milling processes?

block

1337, Corn fuel.

block

1337, Corn fuel!!!11one

tom

anyone have a referal for a producer for zein, I need some zein

masera solomon

what chemicals are are added or used during ethanol production

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