Fuel ethanol production from starchy grain and other crops: An overview on feedstocks, affecting factors, and technical advances

Li, Jun; Zhao, Renyong; Xu, Youjie; Wu, Xiaorong; Bean, Scott R.; Wang, Donghai

doi:10.1016/j.renene.2022.02.038

Cited by 29 publications

(18 citation statements)

References 138 publications

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“…A redox reaction delivers the energy for the bacteria to grow, that means to synthesize more bacteria. In opposite to traditional fermentation processes that are based on starch feedstocks [73,74], synthesis gas fermentation uses gaseous C 1 -substrates and offers great flexibility regarding the feedstock. The fermentation reaction is catalyzed by a chemolithoautotrophic microorganism, and the products could be fuels, chemicals, fats, and proteins [75].…”

Section: Process Parameters and Microorganisms As Biocatalystmentioning

confidence: 99%

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Perret

Campos

Delgado

et al. 2022

Chemie Ingenieur Technik

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Heterogeneous catalysis and anaerobic syngas fermentation represent two different approaches for the conversion of synthesis gas into chemicals and fuels. This review provides a unique comparison of different reaction paths for the fixation of CO 2 , CO and H 2 into elementary building blocks such as methanol, acetic acid and ethanol. Operating conditions, reactor engineering, influence of gas impurities, yields, conversion efficiencies as well as downstream product recovery are compared. It was found that mass-specific productivity ranges in the same order of magnitude for both technologies, while space-time yield of heterogeneous catalysis is up to three orders of magnitude higher.

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Section: Process Parameters and Microorganisms As Biocatalystmentioning

confidence: 99%

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Perret

Campos

Delgado

et al. 2022

Chemie Ingenieur Technik

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“…Bioethanol is one of the most prospective renewable modern biofuels worldwide [1,2]. The global world annual production of bioethanol in 2021 was 27.290 million gallons, while it reached a maximum of 29.330 million gallons in 2019 [3].…”

Section: Introductionmentioning

confidence: 99%

“…Wheat grains are one of the most convenient renewable conventional starch-containing raw materials for bioethanol production. Ethanol is produced from wheat primarily in Canada, European countries, and China [1,2]. However, the limited supply of wheat and other cereals can cause competition between its use in bioethanol and food production.…”

Section: Introductionmentioning

confidence: 99%

Bioethanol Production from A-Starch Milk and B-Starch Milk as Intermediates of Industrial Wet-Milling Wheat Processing

Katanski,

Vučurović,

Vučurović

et al. 2024

Fermentation

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The present work highlights the advances of integrated starch and bioethanol production as an attractive industrial solution for complex wheat exploitation to value-added products focusing on increased profitability. Bioethanol is conventionally produced by dry-milling wheat grain and fermenting sugars obtained by the hydrolysis of starch, while unused nonfermentable kernel compounds remain in stillage as effluents. On the other hand, the wet-milling of wheat flour enables complex wheat processing for the simultaneous production of starch, gluten, and fiber. The intermediates of industrial wheat starch production are A-starch milk, containing mainly large starch granules (diameter > 10 μm), and B-starch milk, containing mainly small starch granules (diameter < 10 μm). The present study investigates different starch hydrolysis procedures using commercial amylase for bioethanol production from A-starch and B-starch milk by batch fermentation using distillers’ yeast Saccharomyces cerevisiae Thermosacc®. Cold hydrolysis with simultaneous liquefaction and saccharification at 65 °C, a pH of 4.5, and a duration of 60 min was the most efficient and energy-saving pretreatment reaching a high conversion rate of starch to ethanol of 93% for both of the investigated substrates. A process design and cost model of bioethanol production from A-starch and B-starch milk was developed using the SuperPro Designer® v.11 (Intelligen Inc., Scotch Plains, NJ, USA) software.

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“…Much interest is directed to sorghum, which stands out for its high starch content (65–72%), excellent drought tolerance, and satisfactory yield per hectare (3.5–5 tonnes ha −1 ) 1–7 . After wheat, rice, maize, and barley, sorghum is the fifth most important cereal crop in the world in terms of area and is used for ethanol production 8,9 . It is grown mainly in tropical and subtropical countries in Africa, Asia, Latin America, and Australia, whereas ongoing climate change and the development of genetic engineering mean that sorghum production is also possible in temperate climates, including Europe 10 .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7] After wheat, rice, maize, and barley, sorghum is the fifth most important cereal crop in the world in terms of area and is used for ethanol production. 8,9 It is grown mainly in tropical and subtropical countries in Africa, Asia, Latin America, and Australia, whereas ongoing climate change and the development of genetic engineering mean that sorghum production is also possible in temperate climates, including Europe. 10 In terms of appearance, physiology of development, chemical composition, and applications, sorghum is very similar to maize, but, in contrast, it is more resistant to drought (has a better developed root system) and has lower fertilizer requirements.…”

Section: Introductionmentioning

confidence: 99%

Bioethanol production from sorghum grain with Zymomonas mobilis: increasing the yield and quality of raw distillates

et al. 2023

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BACKGROUND The present study aimed to demonstrate the superiority of bioethanol yield and its quality from sorghum using the granular starch degrading enzyme Stargen™ 002 over simultaneous saccharification and fermentation, and separate hydrolysis and fermentation using Zymomonas mobilis CCM 3881 and Ethanol Red® yeast. RESULTS Bacteria were found to produce ethanol at higher yield than the yeast in all fermentations. The highest ethanol yield was obtained with Z. mobilis during 48 h of simultaneous saccharification and fermentation (83.85% theoretical yield) and fermentation with Stargen™ 002 (81.27% theoretical yield). Pre‐liquefaction in fermentation with Stargen™ 002 did not improve ethanol yields for both Z. mobilis and Saccharomyces cerevisiae. Chromatographic analysis showed twice less total volatile compounds in distillates obtained after bacterial (3.29–5.54 g L−1) than after yeast (7.84–9.75 g L−1) fermentations. Distillates obtained after bacterial fermentation were characterized by high level of aldehydes (up to 65% of total volatiles) and distillates obtained after yeast fermentation of higher alcohols (up to 95% of total volatiles). The process of fermentation using granular starch hydrolyzing enzyme cocktail Stargen™ 002 resulted in low amounts of all volatile compounds in distillates obtained after bacterial fermentation, but the highest amounts in distillates obtained after yeast fermentation. CONCLUSION The present study emphasizes the great potential of bioethanol production from sorghum with Z. mobilis using granular starch hydrolyzing enzyme Stargen™ 002, which leads to reduced water and energy consumption, especially when energy sources are strongly related to global climate change. © 2023 Society of Chemical Industry.

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Fuel ethanol production from starchy grain and other crops: An overview on feedstocks, affecting factors, and technical advances

Cited by 29 publications

References 138 publications

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Bioethanol Production from A-Starch Milk and B-Starch Milk as Intermediates of Industrial Wet-Milling Wheat Processing

Bioethanol production from sorghum grain with Zymomonas mobilis: increasing the yield and quality of raw distillates

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Fuel ethanol production from starchy grain and other crops: An overview on feedstocks, affecting factors, and technical advances

Cited by 29 publications

References 138 publications

COxFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

COxFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Bioethanol Production from A-Starch Milk and B-Starch Milk as Intermediates of Industrial Wet-Milling Wheat Processing

Bioethanol production from sorghum grain with Zymomonas mobilis: increasing the yield and quality of raw distillates

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Product

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CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis