A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass
Production of high value-added products from lignocelluloses is an economically sustainable alternative to decreasing dependence on fossil fuels and making the chemical processes environmentally friendly. In this study, different methodologies of alkaline (Ca(OH)<sub>2</sub> and NaOH), d...
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| Format: | Article |
| Language: | English |
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AIMS Press
2021-04-01
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| Series: | AIMS Energy |
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| Online Access: | http://www.aimspress.com/article/doi/10.3934/energy.2021002?viewType=HTML |
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| author | Augustine O. Ayeni Michael O. Daramola Oluranti Agboola Ayodeji A. Ayoola Rasheed Babalola Babalola A. Oni Julius O. Omodara Deinma T. Dick |
| author_facet | Augustine O. Ayeni Michael O. Daramola Oluranti Agboola Ayodeji A. Ayoola Rasheed Babalola Babalola A. Oni Julius O. Omodara Deinma T. Dick |
| author_sort | Augustine O. Ayeni |
| collection | DOAJ |
| description | Production of high value-added products from lignocelluloses is an economically sustainable alternative to decreasing dependence on fossil fuels and making the chemical processes environmentally friendly. In this study, different methodologies of alkaline (Ca(OH)<sub>2</sub> and NaOH), dilute acid (10%w/w H<sub>2</sub>SO<sub>4</sub>), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), alkaline peroxide oxidation (H<sub>2</sub>O<sub>2</sub>/Ca(OH)<sub>2</sub> and H<sub>2</sub>O<sub>2</sub>/NaOH), and molten hydrated salt (MHS) mediated (ZnCl<sub>2</sub>.4H<sub>2</sub>O) pretreatments were employed in the hydrolysis of corncob amenable to enzymatic hydrolysis. Optimal enzyme hydrolysis temperature (considering 45 and 50 ℃) and time (2, 24, 72, and 96 h) were investigated for each pretreatment procedure to ascertain the concentrations of glucose, xylose, and total sugar present in the corncob. At 45 ℃ and 96 h, NaOH alkaline pretreatment achieved the best optimum total sugar production of 75.54 mg/mL (about 54% and 88% increments compared to dilute acid pretreatment (35.06 mg/mL total sugars) and MHS (9.32 mg/mL total sugar) pretreatment respectively). In this study, total sugars production increased appreciably at 45 ℃ and longer hydrolysis period (96 h) compared to hydrolysis at 50 ℃ (with maximum total sugars production of 18.00 mg/mL at 96 h). Scanning electron microscopic imaging of the untreated and treated samples displayed cell wall distortion and surface disruptions. |
| first_indexed | 2024-12-10T20:54:03Z |
| format | Article |
| id | doaj.art-99da650a645740e787662ff0655c6db5 |
| institution | Directory Open Access Journal |
| issn | 2333-8334 |
| language | English |
| last_indexed | 2024-12-10T20:54:03Z |
| publishDate | 2021-04-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Energy |
| spelling | doaj.art-99da650a645740e787662ff0655c6db52022-12-22T01:34:00ZengAIMS PressAIMS Energy2333-83342021-04-0191152810.3934/energy.2021002A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomassAugustine O. Ayeni0Michael O. Daramola 1Oluranti Agboola2Ayodeji A. Ayoola3Rasheed Babalola 4Babalola A. Oni 5Julius O. Omodara6Deinma T. Dick 71. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, Nigeria2. Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Private bag X20, Hatfield Pretoria 0028, South Africa1. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, Nigeria1. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, Nigeria3. Akwa Ibom State University, College of Engineering, Department of Chemical/Petrochemical Engineering, Akpaden, Mpat Enin, Nigeria1. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, Nigeria1. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, Nigeria1. Department of Chemical Engineering, College of Engineering, Covenant University, Km. 10 Idiroko Road, Canaan land, Ota, NigeriaProduction of high value-added products from lignocelluloses is an economically sustainable alternative to decreasing dependence on fossil fuels and making the chemical processes environmentally friendly. In this study, different methodologies of alkaline (Ca(OH)<sub>2</sub> and NaOH), dilute acid (10%w/w H<sub>2</sub>SO<sub>4</sub>), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), alkaline peroxide oxidation (H<sub>2</sub>O<sub>2</sub>/Ca(OH)<sub>2</sub> and H<sub>2</sub>O<sub>2</sub>/NaOH), and molten hydrated salt (MHS) mediated (ZnCl<sub>2</sub>.4H<sub>2</sub>O) pretreatments were employed in the hydrolysis of corncob amenable to enzymatic hydrolysis. Optimal enzyme hydrolysis temperature (considering 45 and 50 ℃) and time (2, 24, 72, and 96 h) were investigated for each pretreatment procedure to ascertain the concentrations of glucose, xylose, and total sugar present in the corncob. At 45 ℃ and 96 h, NaOH alkaline pretreatment achieved the best optimum total sugar production of 75.54 mg/mL (about 54% and 88% increments compared to dilute acid pretreatment (35.06 mg/mL total sugars) and MHS (9.32 mg/mL total sugar) pretreatment respectively). In this study, total sugars production increased appreciably at 45 ℃ and longer hydrolysis period (96 h) compared to hydrolysis at 50 ℃ (with maximum total sugars production of 18.00 mg/mL at 96 h). Scanning electron microscopic imaging of the untreated and treated samples displayed cell wall distortion and surface disruptions.http://www.aimspress.com/article/doi/10.3934/energy.2021002?viewType=HTMLpretreatmentlignocellulosepolysaccharideenzymatic hydrolysisreducing sugarsscanning electron microscope |
| spellingShingle | Augustine O. Ayeni Michael O. Daramola Oluranti Agboola Ayodeji A. Ayoola Rasheed Babalola Babalola A. Oni Julius O. Omodara Deinma T. Dick A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass AIMS Energy pretreatment lignocellulose polysaccharide enzymatic hydrolysis reducing sugars scanning electron microscope |
| title | A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass |
| title_full | A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass |
| title_fullStr | A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass |
| title_full_unstemmed | A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass |
| title_short | A comparative evaluation of fermentable sugars production from oxidative, alkaline, alkaline peroxide oxidation, dilute acid, and molten hydrate salt pretreatments of corn cob biomass |
| title_sort | comparative evaluation of fermentable sugars production from oxidative alkaline alkaline peroxide oxidation dilute acid and molten hydrate salt pretreatments of corn cob biomass |
| topic | pretreatment lignocellulose polysaccharide enzymatic hydrolysis reducing sugars scanning electron microscope |
| url | http://www.aimspress.com/article/doi/10.3934/energy.2021002?viewType=HTML |
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