Effect of corn preparation methods on dry-grind ethanol production by granular starch hydrolysis and partitioning of spent beer solids

Lamsal, Buddhi P.; Wang, H.; Johnson, Lawrence A.

doi:10.1016/j.biortech.2011.03.040

Cited by 34 publications

(15 citation statements)

References 14 publications

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“…In the case of the hydrolysis of native starch from grains, the degree of grinding is an important parameter (Szymanowska-Powalowska et al 2012). The degree of milling affects the kinetics of the enzyme and the amounts of sugars produced, because small particles provide a larger surface area (Lamsal et al 2011).…”

Section: Specification Of Raw Materialsmentioning

confidence: 99%

Effect of Pre-hydrolysis on Simultaneous Saccharification and Fermentation of Native Rye Starch

Strąk

Balcerek

2020

Food Bioprocess Technol

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The rising population and increasing demand for food place added pressure on the agricultural sector to maintain high process efficiency while implementing environmentally friendly methods. In this study, we investigate the effect of pre-hydrolysis of native rye starch and its influence on the yield of ethanol obtained by simultaneous saccharification and fermentation (SSF) from high gravity rye mashes with 25% and 28% w w −1 dry matter content. Fermentation was carried out in a 3-day system at a temperature of 35 ± 1°C using the dry distillery yeast Ethanol Red (Saccharomyces cerevisiae). The characteristics of the tested raw material and changes in the native rye starch during enzymatic hydrolysis were analyzed using a scanning electron microscope (SEM). The SEM images revealed characteristic changes on the surface of the starch, which was found to have a layered structure, as well as interesting behavior by the yeast during SSF when the glucose concentration in the environment was lowered. Both in the mashes with 25% and 28% w w −1 dry matter, starch pre-hydrolysis did not significantly increase either the initial amounts of sugars available to the yeast or the fermentation efficiency and ethanol yield in comparison to the mashes without this pre-treatment. Keywords Native starch. Pre-hydrolysis. Fermentation. SSF Abbreviations A 100 absolute alcohol AP amylopectin BD amylopectin of the high-amylopectin cultivar CU Ceralpha unit cv cultivar d.m dry matter DP degree of polymerization DSS degree of starch saccharification GSHE granular starch hydrolyzing enzymes HPLC high-performance liquid chromatography LSD least significant differences PES polyethersulfone PLS pressureless liberation of starch SEM scanning electron microscope SSF simultaneous saccharification and fermentation SSU soluble starch unit VHG very high gravity GAU one glucoamylase unit

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Section: Specification Of Raw Materialsmentioning

confidence: 99%

Effect of Pre-hydrolysis on Simultaneous Saccharification and Fermentation of Native Rye Starch

Strąk

Balcerek

2020

Food Bioprocess Technol

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“…The effect of particle size on the rate of bioconversion has been reported in the previous studies. Bioconversion using dry-ground corn starch showed that the swelling and bursting of starch molecules during cooking made it possible for the hydrolysing enzymes to access linear and branched polymers in gelatinised starch (Lamsal et al, 2011). The considerable corn particle size reduction resulted in significant improvement in sugar release during enzymatic hydrolysis.…”

Section: Glucose Concentrationmentioning

confidence: 99%

Analysis of grinding kinetics to control the effect of rice flour particle size on the yield of alcohol and glucose during fermentation

Song

Lee

et al. 2014

Int J of Food Sci Tech

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“…It is also a good source of industrial products such as starch [5], vitamin [6], fiber [7], oil [8] and ethanol [9]. The global corn production increased from 599.35-867.52 million tonnes (44.74% increase) during the period of 2001-2011 (United States Department of Agriculture, 2011), which is much higher than the increase in the world population of 12.34% during the same period.…”

Section: Introductionmentioning

confidence: 99%

Corn stover thermal decomposition in pyrolytic and oxidant atmosphere

Conesa¹,

Urueña²,

Dı́ez³

2014

Journal of Analytical and Applied Pyrolysis

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The pyrolysis and combustion of corn stover were studied by dynamic thermogravimetry and derivate thermogravimetry (TG-DTG) at heating rates of 5, 10, 20 and 50 K min -1 at atmospheric pressure. For the simulation of pyrolysis and combustion processes a kinetic model based on the distribution of activation energies was used, with three pools of reactants (three pseudocomponents) because of the complexity of the biomass samples of agricultural origin. The experimental thermogravimetric data of pyrolysis and combustion processes were simultaneously fitted to determine a single set of kinetic parameters able to describe both processes at the different heating rates. The model proposed achieves a good correlation between the experimental and calculated curves, with an error of less than 4 % for fitting four heating rates simultaneously. The experimental results and kinetic parameters may provide useful data for the design of thermo decomposition processing system using corn stover as feedstock. On the other hand, analysis of the main compounds in the evolved gas is given by means of a microcromatograph.

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Effect of corn preparation methods on dry-grind ethanol production by granular starch hydrolysis and partitioning of spent beer solids

Cited by 34 publications

References 14 publications

Effect of Pre-hydrolysis on Simultaneous Saccharification and Fermentation of Native Rye Starch

Effect of Pre-hydrolysis on Simultaneous Saccharification and Fermentation of Native Rye Starch

Analysis of grinding kinetics to control the effect of rice flour particle size on the yield of alcohol and glucose during fermentation

Corn stover thermal decomposition in pyrolytic and oxidant atmosphere

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