Acid hydrolysis of sawdust waste into bioethanol

Tulashie, Samuel Kofi; Akpari, Ephraim Edem Amoah; Appiah, Godfred; Adongo, Abigail; Andoh, Ebenezer Kelvin

doi:10.1007/s13399-021-01725-1

Cited by 11 publications

(6 citation statements)

References 40 publications

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“…Despite the low cost of this method, it presents problems of security and corrosion. Furthermore, during this process, some inhibitors, such as furfural, acetic acid, and phenolic compounds, may be formed that hinder biological processes [105,137].…”

Section: Hydrolysis Of Polysaccharidesmentioning

confidence: 99%

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

et al. 2022

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The pulp and paper industry is recognized as a well-established sector, which throughout its process, generates a vast amount of waste streams with the capacity to be valorized. Typically, these residues are burned for energy purposes, but their use as substrates for biological processes could be a more efficient and sustainable alternative. With this aim, it is essential to identify and characterize each type of waste to determine its biotechnological potential. In this context, this research highlights possible alternatives with lower environmental impact and higher revenues. The bio-based pathway should be a promising alternative for the valorization of pulp and paper industry wastes, in particular for bioproduct production such as bioethanol, polyhydroxyalkanoates (PHA), and biogas. This article focuses on state of the art regarding the identification and characterization of these wastes, their main applied deconstruction technologies and the valorization pathways reported for the production of the abovementioned bioproducts.

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Section: Hydrolysis Of Polysaccharidesmentioning

confidence: 99%

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

et al. 2022

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“…While a small amount (5-10%) of foreign matter may be also found in sawdust, the main chemical components of sawdust are carbon (60.8%), hydrogen (5.2%), oxygen (33.8%), and nitrogen (0.9%) [18]. On a dry mass basis, lignocelluloses contain 40-60% cellulose, 20-40% hemicellulose, and 10-25% lignin.…”

Section: Introductionmentioning

confidence: 99%

Effect of Production Factors on the Bioethanol Yield of Tropical Sawdust

Amaefule

Nwakaire

Ogbuagu

et al. 2023

International Journal of Energy Research

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Bioethanol production from cellulosic materials is important in mitigating the concomitant displacement and exploitation of primary food crops for biofuel production and reducing carbon emissions which exacerbate climate change. The problem of reduced yield in the production and availability of yeast locally poses a barrier to market adoption and penetration of bioethanol. The study examined the effect of particle size and different yeast strains on the yield of bioethanol from waste sawdust that was sourced from a local timber processing centre. The samples of yeast were prepared from baker’s yeast (Saccharomyces cerevisiae) and palm wine yeast (Saccharomyces chevalieri). The sawdust was reduced to 212 μm, 300 μm, and 500 μm particle sizes. The samples of each particle size were pretreated and hydrolyzed with H2SO4 and fermented with S. cerevisiae or S. chevalieri yeast. The results obtained show that the weight, pH, density, viscosity, flash point, and heating value of the produced bioethanol ranged between 221.67 and 322.64 g, 6.2 and 6.6, 0.821 and 0.878 g/mL, 1.073 and 1.193, 14 and 16°C, and 20.5 and 23.1 MJ/kg, respectively, while the alcohol content of each of the samples was 69%. Furthermore, the bioethanol yield from Saccharomyces cerevisiae yeast was 213.9 mL, 193.2 mL, and 186.3 mL, for the 212 μm, 300 μm, and 500 μm particles, while for Saccharomyces chevalieri yeast, the yield was 289.8 mL, 255.3 mL, and 220.8 mL for the 212 μm, 300 μm, and 500 μm, respectively. An ANOVA on the effect of particle size on ethanol yield shows a significant difference at 5% level of significance. The study demonstrated that the use of locally produced yeast and increasing the surface area of sawdust increase bioethanol yield. Hence, it was concluded that better yeast strain use and biomass particle size reduction to a level that allows the optimal surface area for the reaction improve the yield of bioethanol. The study outcome can help in ameliorating the continued dependence on fossil fuels and the food security problems arising from displacing or utilizing food for fuel and could also encourage commercial-scale cellulosic ethanol production from waste.

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“…Nowadays, it is a mandate to gradually shift towards circular bioeconomy where renewable resources like biomass and organic waste would provide the basic building blocks to prepare energy, chemicals, and materials, which could dramatically reduce the consumption of fossil fuels and ease the associated environmental challenges. [1] Biomass and organic waste stem from a wide range of sectors like agriculture (e.g., corn stalk and corn stover), [2,3] forestry (e.g., bark and sawdust), [4,5] food waste, [6,7] sewage sludge from wastewater treatment plant, and algae (including microalgae and macroalgae or seaweed). [8] The applications of woody biomass are wide, and the market demand is growing rapidly both in Canada and internationally, which leads to the formation of substantial amounts of wood residue and waste during the plantation, harvesting, and manufacturing stages.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal carbonization of sawdust for hydrochar production to prepare solid fuels

Lilian,

Shui,

Rajput

et al. 2023

Can J Chem Eng

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Hydrothermal carbonization (HTC) of sawdust for producing hydrochar was optimized using response surface methodology (RSM). After optimization, the combustion behaviour and other relevant fuel properties of hydrochar that was obtained at the optimized conditions were studied. Additionally, the aqueous phase obtained at the optimized conditions was recycled as the reaction medium for producing hydrochar and the influence of the aqueous phase recycling on the hydrochar yield and properties was evaluated. The results indicated that the highest hydrochar yield of 84.23 wt.% under the predicted optimum conditions of temperature of 162.23°C, 2.51 h, feedstock loading of 10.71 wt.%, and catalyst loading of 7.99 wt.%. Furthermore, it was found that the use of recycled aqueous phase as the reaction medium led to an increase in the hydrochar yield, higher heating value (HHV), and energy yield, and difference in combustion behaviour was minor. Overall, this study filled the gap in HTC literature regarding the effect of catalyst on hydrochar production and provided a practical solution to treat the aqueous phase.

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Acid hydrolysis of sawdust waste into bioethanol

Cited by 11 publications

References 40 publications

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

Effect of Production Factors on the Bioethanol Yield of Tropical Sawdust

Hydrothermal carbonization of sawdust for hydrochar production to prepare solid fuels

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