Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis
This study examined the behavior of the semi-continuous hydrolysis process of corn stover (CS) in subcritical water, focusing on the effects of varying pH levels (1, 2, 4.5, 7, and 8) and temperatures (113, 130, 170, 210, and 226°C). The results showed that the process at 170°C and pH 1 was able to...
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| Format: | Article |
| Language: | English |
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Alpha Creation Enterprise
2025-03-01
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| Series: | Biofuel Research Journal |
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| Online Access: | https://www.biofueljournal.com/article_216413_d4ec03842906d0b9cebb41517753a427.pdf |
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| author | Rafael Gabriel da Rosa Luiz Eduardo Nochi Castro Tiago Linhares Cruz Tabosa Barroso Vanessa Cosme Ferreira Paulo Rodrigo Stival Bittencourt Maurício Ariel Rostagno Tânia Forster-Carneiro |
| author_facet | Rafael Gabriel da Rosa Luiz Eduardo Nochi Castro Tiago Linhares Cruz Tabosa Barroso Vanessa Cosme Ferreira Paulo Rodrigo Stival Bittencourt Maurício Ariel Rostagno Tânia Forster-Carneiro |
| author_sort | Rafael Gabriel da Rosa |
| collection | DOAJ |
| description | This study examined the behavior of the semi-continuous hydrolysis process of corn stover (CS) in subcritical water, focusing on the effects of varying pH levels (1, 2, 4.5, 7, and 8) and temperatures (113, 130, 170, 210, and 226°C). The results showed that the process at 170°C and pH 1 was able to recover the highest amount of phenolic compounds (76.82 mg Gallic Acid Equivalents g⁻¹), consequently demonstrating the highest antioxidant activities by the Ferric Reducing Antioxidant Power (FRAP) (423.85 μMol TEAC g⁻¹) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) (293.12 μMol TEAC g⁻¹) methods. Additionally, it was possible to obtain the highest concentration of sugars (cellobiose, glucose, and xylose) (460.92 mg g⁻¹). High temperatures (226°C and pH 4.5) produced the highest amount of organic acids (1,157.19 mg g⁻¹). The formation of inhibitors was observed only at temperatures of 170 and 210 °C at a pH of 1.0. The highest yields of sugars, organic acids, and inhibitors were 0.565, 1.123, and 0.665 mg g⁻¹ of carbohydrates, respectively. The statistical analysis identified the optimal conditions for the recovery of various compounds: phenolic compounds at 190.7 °C and pH 1, soluble proteins at 187.4 °C and pH 1, sugars at 134.9 °C and pH 1, organic acids at 223.59 °C and pH 4.1, and for minimizing inhibitors at 114.95 °C and pH 7.3. EcoScale analysis identified subcritical water as the most sustainable and efficient method for CS hydrolysis. Subcritical water treatment effectively recovers valuable compounds from CS, promoting a circular economy by valorizing waste and reducing resource dependence. |
| format | Article |
| id | doaj-art-da3ffb5fe8b841f7bf1bc4e2f749941f |
| institution | OA Journals |
| issn | 2292-8782 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Alpha Creation Enterprise |
| record_format | Article |
| series | Biofuel Research Journal |
| spelling | doaj-art-da3ffb5fe8b841f7bf1bc4e2f749941f2025-08-20T02:10:39ZengAlpha Creation EnterpriseBiofuel Research Journal2292-87822025-03-011212283230510.18331/BRJ2025.12.1.2216413Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysisRafael Gabriel da Rosa0Luiz Eduardo Nochi Castro1Tiago Linhares Cruz Tabosa Barroso2Vanessa Cosme Ferreira3Paulo Rodrigo Stival Bittencourt4Maurício Ariel Rostagno5Tânia Forster-Carneiro6System School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato, Campinas, São Paulo, Brazil.System School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato, Campinas, São Paulo, Brazil.System School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato, Campinas, São Paulo, Brazil.System School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato, Campinas, São Paulo, Brazil.Department of Chemistry, Federal Technological University of Parana (UTFPR), Medianeira, Paraná, Brazil.School of Applied Sciences (FCA), University of Campinas (UNICAMP), Limeira, São Paulo, Brazil.System School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato, Campinas, São Paulo, Brazil.This study examined the behavior of the semi-continuous hydrolysis process of corn stover (CS) in subcritical water, focusing on the effects of varying pH levels (1, 2, 4.5, 7, and 8) and temperatures (113, 130, 170, 210, and 226°C). The results showed that the process at 170°C and pH 1 was able to recover the highest amount of phenolic compounds (76.82 mg Gallic Acid Equivalents g⁻¹), consequently demonstrating the highest antioxidant activities by the Ferric Reducing Antioxidant Power (FRAP) (423.85 μMol TEAC g⁻¹) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) (293.12 μMol TEAC g⁻¹) methods. Additionally, it was possible to obtain the highest concentration of sugars (cellobiose, glucose, and xylose) (460.92 mg g⁻¹). High temperatures (226°C and pH 4.5) produced the highest amount of organic acids (1,157.19 mg g⁻¹). The formation of inhibitors was observed only at temperatures of 170 and 210 °C at a pH of 1.0. The highest yields of sugars, organic acids, and inhibitors were 0.565, 1.123, and 0.665 mg g⁻¹ of carbohydrates, respectively. The statistical analysis identified the optimal conditions for the recovery of various compounds: phenolic compounds at 190.7 °C and pH 1, soluble proteins at 187.4 °C and pH 1, sugars at 134.9 °C and pH 1, organic acids at 223.59 °C and pH 4.1, and for minimizing inhibitors at 114.95 °C and pH 7.3. EcoScale analysis identified subcritical water as the most sustainable and efficient method for CS hydrolysis. Subcritical water treatment effectively recovers valuable compounds from CS, promoting a circular economy by valorizing waste and reducing resource dependence.https://www.biofueljournal.com/article_216413_d4ec03842906d0b9cebb41517753a427.pdfsustainable technologybiorefineryrenewable resourcesphenolic compoundsfermentable sugarscorn biomass |
| spellingShingle | Rafael Gabriel da Rosa Luiz Eduardo Nochi Castro Tiago Linhares Cruz Tabosa Barroso Vanessa Cosme Ferreira Paulo Rodrigo Stival Bittencourt Maurício Ariel Rostagno Tânia Forster-Carneiro Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis Biofuel Research Journal sustainable technology biorefinery renewable resources phenolic compounds fermentable sugars corn biomass |
| title | Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| title_full | Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| title_fullStr | Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| title_full_unstemmed | Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| title_short | Valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| title_sort | valorizing corn stover waste into valuable bioproducts using subcritical water hydrolysis |
| topic | sustainable technology biorefinery renewable resources phenolic compounds fermentable sugars corn biomass |
| url | https://www.biofueljournal.com/article_216413_d4ec03842906d0b9cebb41517753a427.pdf |
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