Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 36 for “"dry grind"”.
-
Increasing dry grind ethanol yield through fiber pretreatment after liquefaction
… and fiber in corn grain are 72 and 10% on a dry basis (db), respectively. In the conventional dry grind process, starch is converted to ethanol; whereas, corn fiber remains unconverted. Corn fiber contains 12 to 18% cellulose and 11 to 23% starch which can be hydrolyzed and fermented into …
-
Effects of corn quality and storage on dry grind ethanol production
Corn dry grind industry is the major contributor of ethanol production in the US. Ethanol plants incur economic losses due to seasonal variations in ethanol yields. Ethanol yields typically are low during the first month after harvest, increase for the next six to seven months and decrease again …
-
Factors Affecting Starch Conversion to Ethanol in Dry Grind Corn Process
… ethanol concentration and corn starch content in dry grind corn process. Effect of amylose:amylopectin ratios and resistant starch in corn starch on ethanol concentration was evaluated with four enzyme treatments operating at varying temperature and pH liquefaction conditions. Final ethanol …
-
Decision Making in Dry-Grind Ethanol Industry Using Near-Infrared Spectroscopy
Calibration on the FT-NIR spectrometer for total soluble sugars predicted fermentation samples with a RMSEP of 0.87% w/v and RPD of 8.7. Total soluble sugar ranged from 0.4 to 22.2% w/v. Thus, in order to observe the effect of treatment on total soluble sugars, the difference between total soluble …
-
Protein enhancement of DDGS from conventional and enzymatic dry grind processes
Conventional and enzymatic (E-Mill) dry grind processes were used to produce distillers dried grains with solubles (DDGS). In the conventional process, slurry used whole ground corn and fermented. In the E-Mill process, germ and pericarp fiber were recovered prior to fermentation. Protein …
-
Enzymatic and process technologies to increase corn dry grind slurry solids
In conventional dry grind process, high glucose concentrations (>15% w/w) and liquefaction viscosities restrict slurry solids contents to 30 to 32% w/w. High slurry solids fermentations (above 33%) are important in reducing energy costs; decreased water input results in less evaporation, …
-
Development of a Controller for Fermentation in the Dry Grind Corn Process
… Use of the optimal controller in conventional dry grind ethanol processes can result in estimated cost savings up to $1 million for a 151 million L/yr (40 million gal/yr) dry grind plant.
-
Enzymatic Enhancement of Water Removal In the Dry Grind Corn to Ethanol Process
… process requires a significant energy input. The drying of the coproducts is responsible for as much as 32% of the total utilities cost of the process. In this study, improvements in the energy and water balances of the corn to ethanol process and a decrease in ethanol production costs were …
-
Characterization of zein extracted from beer solids, a coproduct of dry-grind ethanol
… Distillers’ wet grains (DWG) a coproduct of dry grind ethanol contain about 40% (db) protein, where 50% of the protein is zein. Attempts to extract zein from coproducts have been limited to distillers’ dried grains with solubles (DDGS), but products from this process have not been fully …
-
Applications of alpha-amylase corn in the dry grind process for fuel ethanol production
Dry grind processing for fuel ethanol production from corn faces obstacles that limit profitability and sustainability. High temperatures required for liquefaction demand large thermal energy inputs and produce slurries with high final viscosities. These viscosity values increase power consumed by …
-
Analysis of Heat Transfer Fouling by Thin Stillage From Dry Grind Corn Processing Facilities
… on fouling by thin stillage from a commercial dry grind corn (DGC) process used to produce ethanol from corn. Thin stillage is a DGC process stream consisting primarily of unfermented dissolved solids that are concentrated by evaporators to produce an animal food. Evaporator fouling is costly …
-
Characterization of amylose lipid complexes and their effect on the corn dry grind process
The dry grind process is the most commonly used method for production of corn ethanol. Ethanol from corn is the biggest contributor to bioethanol produced in the US. In this study, effects of different parameters such as liquefaction temperature, solids content and particle size on formation of …
-
Engineering economic analysis of the quick-germ/quick-fiber modified dry grind ethanol fractionation process
… of corn-to-ethanol production, several modified dry grind processes had been developed at the lab scale. The Quick-germ / Quick-fiber (QQ) process is one of them. However, there has been no analysis of the QQ process that provides detailed information related to the energy, water, and economic …
-
Technical and economic viability of value added product recovery in the corn dry grind ethanol process
… ethanol is the primary product of the corn dry grind ethanol process, other coproducts in the dry grind process also contribute to sustainability. However, low coproduct value is responsible for high dependence of plant profitability on ethanol revenue. Improving coproduct value and …
-
Comparison of fermentation characteristics between colored corn and yellow dent corn using two dry grind process methods
In dry grind ethanol plant, distillers dried grains with solubles (DDGS) is the primary coproduct which is used mainly in ruminant animal diets. Increasing market demand for coproduct in dry grind process is needed. One way is to use corn rich in anthocyanin content as feedstock. Anthocyanin …
-
Evaluating the potential of phosphorous recovery from wet milling and dry grind corn facilities using chemical precipitation
… production such as distillers grain (dry milling) and corn gluten feed (wet milling) are utilized as animal feed. About 50 - 80 % of the phosphorous in corn is in the form of phytate (inositol hexakisphosphate) which cannot be digested by non-ruminant animal and is released in the …
-
Thin Stillage Fractionation to Improve Water Recycling Rates and Heat Transfer Characteristics in the Corn Dry Grind Process
… microfiltration (MF) system for the corn dry grind process. Total area requirement decreased with number of stages but there was tradeoff between higher capital costs involved at higher number of stages. Optimal system also showed potential to process more than twice the amount of thin …
-
"The Feasibility and Profitability of the ""Quick Germ"" Process for Ethanol Production From Corn"
… process proved profitable and retrofitting a dry-grind ethanol plant with a germ recovery facility was justified. The ""Quick Germ"" process has the potential to add $65 to 110 million/yr in added revenue for the dry-grind ethanol industry based on 16.57 million tonnes (652.7 million bu) …
-
Modeling the Fourier transform near infrared spectra of unreacted starch in corn for monitoring applications
The dry grind ethanol process is an important part of the renewable biofuels industry. In this process corn must be stored and used throughout the year. Corn quality changes, in terms of unreacted starch content, in the dry grind process have not been extensively studied, although they impact the …
-
Production of Zein From Dry Milled Corn by Solvent Extraction and Ultrafiltration
… into any corn processing facility, especially dry-grind ethanol plants. The solvent extraction step involves only mixing and a filtration/centrifugation step. The filtered extract, after further treatment if necessary to improve protein purity, can be concentrated using solvent stable membranes …
Page 1 of 2