Biotechnological processes for conversion of corn into ethanol

  title={Biotechnological processes for conversion of corn into ethanol},
  author={Rodney J. Bothast and M. A. Schlicher},
  journal={Applied Microbiology and Biotechnology},
Ethanol has been utilized as a fuel source in the United States since the turn of the century. However, it has repeatedly faced significant commercial viability obstacles relative to petroleum. Renewed interest exists in ethanol as a fuel source today owing to its positive impact on rural America, the environment and United States energy security. Today, most fuel ethanol is produced by either the dry grind or the wet mill process. Current technologies allow for 2.5 gallons (wet mill process… Expand

Figures and Topics from this paper

Researchof ethanol from winter barley by the EDGE (enhanced dry grind enzymatic) process
Background: US legislation requires the use of advanced biofuels to be made from non-food feedstocks. However, commercialization of lignocellulosic ethanol technology is more complex than expectedExpand
Comphrensive resource balance for ethanol produced from corn and sugarcane
Due to the increase in price of fossil fuels and climate change caused by Greenhouse Gas (GHG) emissions, many countries around the world are trying to produce alternative transportation fuels.Expand
Production of ethanol from winter barley by the EDGE (enhanced dry grind enzymatic) process
This is the first full report on the benefits of adding β-glucosidases to increase the ethanol yield, and a new fermentation process from Thoroughbred, a winter barley variety with a high starch content, was developed. Expand
Feedstock crop genetic engineering for alcohol fuels.
Improvements made in feedstock crop genetic engineering in the above areas are reviewed and possible near-future perspectives are discussed. Expand
Life Cycle Analysis for a Technical, Environmental and Economic Comparison between Corn and Shale Gas Ethanol
Biogenic ethanol from corn has proven effective as an oxygenate that improves gasoline engine performance. However, the US Renewable Fuel Portfolio legislation was written before shale gas became aExpand
Bioethanol production from renewable sources: Current perspectives and technological progress
Bioethanol is an attractive biofuel having potential for energy security and environmental safety over fossil fuels. To date, numerous biomass resources have been investigated for bioethanolExpand
Distiller’s spent grains: a substrate for bioethanol?
Fuel ethanol is produced by the fermentation of sugars that are mainly produced from agricultural crops. Brazil and USA are the main bioethanol producers in the world. Maize is the main raw materialExpand
Production of ethanol from corn and sugarcane.
Cornstarch is processed to ethanol by either the dry-grind or wet-milling process. The two processes differ in how the kernel is initially treated to access starch for enzymatic hydrolysis. InExpand
Modeling the process and costs of fuel ethanol production by the corn dry-grind process
The corn dry-grind process is the most widely used method in the U.S. for generating fuel ethanol by fermentation of grain. Increasing demand for domestically produced fuel and changes in theExpand
Brazilian “Flex Mills”: Ethanol from Sugarcane Molasses and Corn Mash
This manuscript shows an ethanol production from two simultaneously processed raw materials: corn grains and molasses residue from sugarcane production. This process is new in countries such asExpand


Assessment of ethanol production options for corn products
Abstract The production of ethanol from corn fiber has the potential to increase ethanol yields by a maximum of 0.3 gal/bushel in a wet-milling process. Incremental yields would be 0.13 gal/bushelExpand
Fermentations with New Recombinant Organisms
The fermentation of corn fiber hydrolyzates by the various strains developed holds considerable promise, with the possibility existing that different “industrially hardened” strains may find separate applications in the fermentation of specific feedstocks. Expand
Recovery of Fiber in the Corn Dry-Grind Ethanol Process: A Feedstock for Valuable Coproducts
ABSTRACT A new process was developed to recover corn fiber from the mash before fermentation in dry-grind ethanol production. In this process, corn is soaked in water (no chemicals) for a shortExpand
Outlook for Biomass Ethanol Production and Demand
The production of ethanol from corn is a mature technology that is not likely to see significant reductions in production costs. The ability to produce ethanol from low-cost biomass will be key toExpand
Hydrolysis by commercial enzyme mixtures of AFEX-treated corn fiber and isolated xylans
Corn fiber is a coproduct produced during the corn wet-milling process and is similar to other high hemicellulose/cellulose-containing biomass such as grasses, straws, or bagasse, all of whichExpand
Saccharification of corn fibre by combined treatment with dilute sulphuric acid and enzymes
Corn fibre is a co-product of the corn wet milling industry which is usually marketed as a low value animal feed ingredient. Approximately 4·7 × 106 dry tons of this material are produced annually inExpand
Studies conducted since the late 1970s have estimated the net energy value (NEV) of corn ethanol. However, variations in data and assumptions used among the studies have resulted in a wide range ofExpand
Fuel-Cycle Fossil Energy Use and Greenhouse Gas Emissions of Fuel Ethanol Produced from U.S. Midwest Corn
This study addresses two issues: (1) data and information essential to an informed choice about the corn-to-ethanol cycle are in need of updating, thanks to scientific and technological advances inExpand
Effect of Soak Time, Soak Temperature, and Lactic Acid on Germ Recovery Parameters
Cereal Chem. 73(6):716-720 To recover high valued corn germ from dry-milling ethanol facilities, flotation and skimming. Recovery levels of germ were near that of tradicorn was hydrated in under 12Expand
Corn: chemistry and technology.
Corn :chemistry and technology , Corn :chemistry and technology , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی