Comparison of mild alkaline and oxidative pretreatment methods for biobutanol production from brewer’s spent grains

Fernández‐Delgado, Marina; Plaza, Pedro E.; Coca, Mónica; Cubero, Marı́a Teresa Garcı́a; Benito, Gerardo González; Lucas, Susana

doi:10.1016/j.indcrop.2018.12.087

Cited by 53 publications

(9 citation statements)

References 44 publications

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“…95 The butanol yield produced from BSG ranged from 7 to 11 g butanol L −1 , which means that 45 kg butanol ton −1 BSG can be produced. 90,95,96 In an experiment with an acid pretreatment, xylose was the main sugar obtained from BSG, with an extraction efficiency of up to 90%. 31 Xylose can also be converted into xylitol by Candida guilliermondii yeast, a technological route to upgrade the economic indicators of a biorefinery.…”

Section: Table 4 (Continued)mentioning

confidence: 99%

“…Brewer's spent grains can be pre‐treated with laccase from Pleurotus ostreatus to promote detoxification and delignification, resulting in sugar conversion of around 80% 95 . The butanol yield produced from BSG ranged from 7 to 11 g butanol L −1 , which means that 45 kg butanol ton −1 BSG can be produced 90,95,96 …”

Section: Biorefinery To the Valorization Of Bsgmentioning

confidence: 99%

“…As Fig. 8 shows, different pretreatments were applied in the BSG, such as acid, 31 alkali, 93 acid‐alkali, 100 chemical, 96 supercritical, 70 pulsed electric, 89 hydrothermal, 29 and enzymatic hydrolysis 90 . Most of them can be promising approaches to upgrade the sugar yield.…”

Section: Biorefinery To the Valorization Of Bsgmentioning

confidence: 99%

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A bibliometric analysis on potential uses of brewer's spent grains in a biorefinery for the circular economy transition of the beer industry

Ampese

Mussatto²,

Forster‐Carneiro

2021

Biofuels Bioprod Bioref

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This comprehensive review aims to elucidate the state of the art related to research trends regarding the use of brewer's spent grains (BSG), the main solid by-product generated in breweries. Its status, future opportunities, and emerging trends were evaluated by bibliometric analysis, which contributed to clarifying the knowledge and perspectives in the field. In total, 510 documents were obtained from the Web of Science© database in a timespan from 1900 to 2020. VosViewer software and R-bibliometrix package were used to investigate and map the most frequently cited papers, international collaborative networks, keywords, and the main countries and journals associated with this research. The results showed that, globally, 65 countries have been engaged in research related to BSG, and Brazil has been the most productive country, with up to 70 publications. Keyword analysis revealed that the studies on BSG are divided into four main knowledge areas: (i) pretreatment; (ii) nutritional quality; (iii) bioactive compounds, and (iv) pyrolysis. It was also found that a biorefinery can be designed for the complete utilization of BSG to obtain several valuable compounds. In this sense, different technological routes can be applied to produce arabinoxylans, proteins, ferulic acid, xylitol, xylose, lactic acid, butanol, biogas, fertilizer, and ethanol. In conclusion, BSG is a cost-effective and feasible raw material for the sustainable production of bio-based products and bioenergy and its valorization in a biorefinery is a powerful strategy to promote the circular economy transition of the beer industry.

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Section: Table 4 (Continued)mentioning

confidence: 99%

Section: Biorefinery To the Valorization Of Bsgmentioning

confidence: 99%

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A bibliometric analysis on potential uses of brewer's spent grains in a biorefinery for the circular economy transition of the beer industry

Ampese

Mussatto²,

Forster‐Carneiro

2021

Biofuels Bioprod Bioref

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“…For example, the degradation of furfural is an aldehyde-alcohol transformation reaction, which includes furfuralcohol and furoic acid (Sun et al, 2020). To reduce the inhibitory effect of these compounds, the procedure of washing the biomass after pre-treatment is most commonly used, thus using a reasonable amount of water, causing the production of another effluent and the probable loss of sugars found in the biomass (Pan et al, 2019;Fernández-Delgado et al, 2019).…”

Section: Inhibitorsmentioning

confidence: 99%

The fermentation efficiency exhibited by Saccharomyces cerevisiae on Sugarcane bagasse hydrolysate, by analyzing the effects of pre-treatment and detoxification

Gomes

Rocha

Barbosa

et al. 2022

Semina: Ciênc. Agrár.

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In this study, the possibility of increasing fermentation efficiency of Saccharomyces cerevisiae on sugarcane bagasse (a type of lignocellulosic waste) was analyzed. Sugarcane bagasse was subjected to hydrothermal and acidic pre-treatment. Next, the enzymatic hydrolysis of raw biomass and each pre-treated biomass was performed using CellicCtec® enzymatic complex to obtain sugarcane hydrolysate, hydrothermal hydrolysate and acidic hydrolysate. Next, these were fermented by S. cerevisiae to check if the by-products of enzymatic hydrolysis, furfural and acetic acid had an inhibitory effect on fermentation efficiency. Next, each pre-treated biomass was subjected to detoxification involving activated charcoal. Each detoxified biomass was tested for fermentation efficiency. The lignocellulosic composition for sugarcane hydrolysate, hydrothermal hydrolysate and acidic hydrolysate, varied significantly, and were found to be, for cellulose 36.7%, 27.7% and 63.7% respectively; for hemicellulose 22.2%, 4.4% and 12% respectively; and for lignin 21.2%, 27.7% and 28.7% respectively. The presence of furfural and acetic acid had a strong influence on the fermentation efficiency of S. cerevisiae, and affected the consumption of sugars in each biomass by more than 90%. Further, we found that the detoxification process increased fermentation efficiency by 12.7% for the hydrothermal hydrolysate while for the acidic hydrolysate no significant difference was observed. This study showed that fermentation with greater efficiency is viable through the combined use of hydrothermal pre-treatment and detoxification. This combination of methods also causes less pollution as compared with the method involving acid pre-treatment due to the reduced number of effluents produced.

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“…With heterogeneous characteristics, including the skin, pericarp, endosperm of the malted barley grain (5), it accounts for about 85% of byproducts, consisting of lignin, cellulose and non-cellulosic polysaccharides together with fatty acids and minerals (6)(7)(8). Much research has been performed to explore the industrial and technological applications of spent grain including polymers (9), biofuels (10,11), fish food (12), enzymes (13), energy (14,15) and polysaccharides (16).…”

Section: Introductionmentioning

confidence: 99%

Brewery spent grain: a potential biosorbent for hexavalent chromium

2021

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Spent grain is a solid waste from the brewery process which is used as feed for ruminants or as organic fertiliser. Due to the large scale generation of spent grain, new technological and industrial applications are being developed. In this work, spent grain was modified by chemical treatments for use in the biosorption of hexavalent chromium. For spent grain treated with acid, alkali, petroleum ether and hydrogen peroxide, the amount of hexavalent chromium removed was respectively 97, 21, 0.9 and 0.5%. The kinetic data of spent grain biosorbent treated with acid, untreated and treated with alkali were applied to pseudo‐first order, pseudo‐second order and intraparticle diffusion models. The pseudo‐second order model showed the best fit to the kinetic data, indicating chemisorption in the biosorption processes. The effects of pH and biosorbent concentration were analysed for spent grain treated with acid. The optimum values for pH and concentration of the biosorbent were pH 2 and 2 g/L.

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Comparison of mild alkaline and oxidative pretreatment methods for biobutanol production from brewer’s spent grains

Cited by 53 publications

References 44 publications

A bibliometric analysis on potential uses of brewer's spent grains in a biorefinery for the circular economy transition of the beer industry

A bibliometric analysis on potential uses of brewer's spent grains in a biorefinery for the circular economy transition of the beer industry

The fermentation efficiency exhibited by Saccharomyces cerevisiae on Sugarcane bagasse hydrolysate, by analyzing the effects of pre-treatment and detoxification

Brewery spent grain: a potential biosorbent for hexavalent chromium

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