Distiller's spent grains: a substrate for bioethanol?

Yohannan, Biju K.; White, Jane S.; Bennett, J. A.; Walker, Graeme M.

doi:10.7313/upo9781907284830.023

Cited by 2 publications

(1 citation statement)

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“…Even after optimization (effect of pH, other toxic inhibitors or lack of nutrients), performed by Yohannan et al [20], the same strain gave a comparable ethanol production (~14.8 g/L) (Table 3) to that obtained in this work (12.79 g/L). Recently, Xiros and Christakopoulos [22] obtained a high ethanol yield from BSG by using the fungus Fusarium oxysporum.…”

Section: Ethanol Production Using Bsg Hydrolysate As Fermentation Mediumsupporting

confidence: 58%

Second Generation Ethanol Production from Brewers’ Spent Grain

et al. 2015

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Ethanol production from lignocellulosic biomasses raises a global interest because it represents a good alternative to petroleum-derived energies and reduces the food versus fuel conflict generated by first generation ethanol. In this study, alkaline-acid pretreated brewers' spent grain (BSG) was evaluated for ethanol production after enzymatic hydrolysis with commercial enzymes. The obtained hydrolysate containing a glucose concentration of 75 g/L was adopted, after dilution up to 50 g/L, for fermentation by the strain Saccharomyces cerevisiae NRRL YB 2293 selected as the best producer among five ethanologenic microorganims. When the hydrolysate was supplemented with yeast extract, 12.79 g/L of ethanol, corresponding to 0.28 g of ethanol per grams of glucose consumed (55% efficiency), was obtained within 24 h, while in the non-supplemented hydrolysate, a similar concentration was reached within 48 h. The volumetric productivity increased from 0.25 g/L·h in the un-supplemented hydrolysate to 0.53 g/L h in the yeast extract supplemented hydrolysate. In conclusion, the strain S. cerevisiae NRRL YB 2293 was shown able to produce ethanol from BSG. Although an equal amount of ethanol was reached in both BSG hydrolysate media, the nitrogen source supplementation reduced the ethanol fermentation time and promoted glucose uptake and cell growth. OPEN ACCESSEnergies 2015, 8 2576

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Section: Ethanol Production Using Bsg Hydrolysate As Fermentation Mediumsupporting

confidence: 58%