Second Generation Bioethanol Production: On the Use of Pulp and Paper Industry Wastes as Feedstock

Due to the health and environment impacts of fossil fuels utilization, biofuels have been investigated as a potential alternative renewable source of energy. Bioethanol is currently the most produced biofuel, mainly of first generation, resulting in food-fuel competition. Second generation bioethano...

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Bibliographic Details
Published in:Fermentation (Basel) 2019, Vol.5 (1), p.4
Main Authors: Branco, Rita, Serafim, Luísa, Xavier, Ana
Format: Article
Language:English
Subjects:
Alternative energy sources
Biodiesel fuels
bioethanol
Biofuels
Biomass
Carbon
Cellulose
Chemical bonds
Consumption
Economics
Emissions
Ethanol
Food
Food chains
Fossil fuels
kraft pulp
Lignin
Lignocellulose
lignocellulosic biomass
Monosaccharides
Paper industry wastes
Polysaccharides
Pulp & paper industry
Pulp & paper mills
pulp and paper industry
pulp and paper sludge
Sludge
spent sulfite liquor
Sugarcane
Sulfite
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Summary:Due to the health and environment impacts of fossil fuels utilization, biofuels have been investigated as a potential alternative renewable source of energy. Bioethanol is currently the most produced biofuel, mainly of first generation, resulting in food-fuel competition. Second generation bioethanol is produced from lignocellulosic biomass, but a costly and difficult pretreatment is required. The pulp and paper industry has the biggest income of biomass for non-food-chain production, and, simultaneously generates a high amount of residues. According to the circular economy model, these residues, rich in monosaccharides, or even in polysaccharides besides lignin, can be utilized as a proper feedstock for second generation bioethanol production. Biorefineries can be integrated in the existing pulp and paper industrial plants by exploiting the high level of technology and also the infrastructures and logistics that are required to fractionate and handle woody biomass. This would contribute to the diversification of products and the increase of profitability of pulp and paper industry with additional environmental benefits. This work reviews the literature supporting the feasibility of producing ethanol from Kraft pulp, spent sulfite liquor, and pulp and paper sludge, presenting and discussing the practical attempt of biorefineries implementation in pulp and paper mills for bioethanol production.
ISSN:2311-5637
2311-5637
DOI:10.3390/fermentation5010004