2019
DOI: 10.1016/j.renene.2018.06.062
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A review of recent advances in high gravity ethanol fermentation

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Cited by 79 publications
(46 citation statements)
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“…[4,5,[8][9][10]. To this end, the establishment of fermentation when very high initial quantities of sugars (i.e., ≥250 g/L) are employed as substrate (so-called "very-high-gravity fermentation"), as well as the accomplishment of fermentation under non-aseptic conditions, has recently gained significant attention [5,11,12]. Both these strategies may offer great savings in process water and energy requirements, and when appropriate microbial strains are found for these purposes, no major alterations to the production lines of existing bioethanol production plants are required [11,13].…”
Section: Introductionmentioning
confidence: 99%
“…[4,5,[8][9][10]. To this end, the establishment of fermentation when very high initial quantities of sugars (i.e., ≥250 g/L) are employed as substrate (so-called "very-high-gravity fermentation"), as well as the accomplishment of fermentation under non-aseptic conditions, has recently gained significant attention [5,11,12]. Both these strategies may offer great savings in process water and energy requirements, and when appropriate microbial strains are found for these purposes, no major alterations to the production lines of existing bioethanol production plants are required [11,13].…”
Section: Introductionmentioning
confidence: 99%
“…Further, the ethanol productivity reported in this study includes the growth phase as well as the production phase without the addition of yeast extract or peptone. Moreover, this process was competitive with starch-based processes [53]. Further, several recombinant yeast studies that have reported using high density (20 OD) inoculum [25,26] did not include in the ethanol yields or productivities the material and time required to generate the inoculum.…”
Section: Discussionmentioning
confidence: 99%
“…There is little differentiation between the projected economic performances of these typical processes, including acid/alkaline pretreatments [37]. In the past years, extensive studies have been conducted to reduce the high cost by optimizing enzyme production, pretreatment, enzymatic hydrolysis, and the following fermentation [38][39][40][41][42][43][44][45]. Recent economic analysis showed that the minimum ethanol selling price of bioethanol process decreased from 4.58 USD/gallon to 1.91~2.46 USD/gallon [38,39].…”
Section: Mass Balance For One-step/two-step Processesmentioning
confidence: 99%