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Park JS, Han JM, Shin YN, Park YS, Shin YR, Park SW, Roy VC, Lee HJ, Kumagai Y, Kishimura H, Chun BS. Exploring Bioactive Compounds in Brown Seaweeds Using Subcritical Water: A Comprehensive Analysis. Mar Drugs 2023; 21:328. [PMID: 37367653 DOI: 10.3390/md21060328] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/17/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023] Open
Abstract
In this study, we characterized the bioactive properties of three important brown seaweed species, Sargassum thunbergii, Undaria pinnatifida, and Saccharina japonica, by subcritical water extraction (SWE), as these species are well known for their beneficial health effects. Their physiochemical properties, including potential antioxidant, antihypertensive, and α-glucosidase inhibitory activity, and the antibacterial activity of the hydroysates were also analyzed. The highest total phlorotannin, total sugar content, and reducing sugar content in the S. thunbergii hydrolysates were 38.82 ± 0.17 mg PGE/g, 116.66 ± 0.19 mg glucose/g dry sample, and 53.27 ± 1.57 mg glucose/g dry sample, respectively. The highest ABTS+ and DPPH antioxidant activities were obtained in the S. japonica hydrolysates (124.77 ± 2.47 and 46.35 ± 0.01 mg Trolox equivalent/g, respectively) and the highest FRAP activity was obtained in the S. thunbergii hydrolysates (34.47 ± 0.49 mg Trolox equivalent/g seaweed). In addition, the seaweed extracts showed antihypertensive (≤59.77 ± 0.14%) and α-glucosidase inhibitory activity (≤68.05 ± 1.15%), as well as activity against foodborne pathogens. The present findings provide evidence of the biological activity of brown seaweed extracts for potential application in the food, pharmaceutical, and cosmetic sectors.
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Affiliation(s)
- Jin-Seok Park
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Ji-Min Han
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Yu-Na Shin
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Ye-Seul Park
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Ye-Ryeon Shin
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Sin-Won Park
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
| | - Vikash Chandra Roy
- Institute of Food Science, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
- Department of Fisheries Technology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh
| | - Hee-Jeong Lee
- Department of Food Science and Nutrition, Kyungsung University, Busan 48434, Republic of Korea
| | - Yuya Kumagai
- Laboratory of Marine Chemical Resource Development, Faculty of Fisheries Sciences, Hokkaido University, Hakodate 041-8611, Japan
| | - Hideki Kishimura
- Laboratory of Marine Chemical Resource Development, Faculty of Fisheries Sciences, Hokkaido University, Hakodate 041-8611, Japan
| | - Byung-Soo Chun
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro Namgu, Busan 48513, Republic of Korea
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Martins-Vieira JC, Lachos-Perez D, Draszewski CP, Celante D, Castilhos F. Sugar, Hydrochar and Bio-oil Production by Sequential Hydrothermal Processing of Corn Cob. J Supercrit Fluids 2023. [DOI: 10.1016/j.supflu.2023.105838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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3
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Kang X, Peng J, Ragauskas AJ, Ren X, Si C, Wang S, Song X. Competitive effects of glucan's main hydrolysates on biochar formation: A combined experiment and density functional theory analysis. BIORESOURCE TECHNOLOGY 2022; 359:127427. [PMID: 35660655 DOI: 10.1016/j.biortech.2022.127427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
The complexity of polysaccharide hydrothermal products increases the difficulty of exploring the formation of biochar, limiting the development of biochar. This work clarifies the completive effects of glucan's main hydrolysates on biochar formation from three aspects: experimental, thermodynamic, and kinetic. The products distribution illustrates that 5-HMF, FA, and LA are mainly involved in the formation of biochar. Biochar mainly includes furan ring, ether group, and ester group by the analysis of magic-angle-spinning nuclear magnetic resonance, X-ray photoelectron spectroscopy, and elemental analysis. Combined experiments and density functional theory analysis, the etherification reaction of 5-HMF itself is most likely to occur and is key to form biochar, followed by the esterification of FA with 5-HMF, and then the etherification of 5-HMF and LA. The further verified experiments also manifest these results. This work will develop a foundation for exploring the complex formation mechanism of cellulose-based biochar.
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Affiliation(s)
- Xiheng Kang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Jian Peng
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Arthur J Ragauskas
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA; Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA; Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, The University of Tennessee, Knoxville, TN 37996, USA
| | - Xiaofei Ren
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Chuanling Si
- Tianjin University Sci & Technol, Tianjin Key Lab Pulp & Paper, College Light Industry & Engineering, Tianjin 300457, PR China
| | - Shuangfei Wang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Xueping Song
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China.
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Sarker TR, Pattnaik F, Nanda S, Dalai AK, Meda V, Naik S. Hydrothermal pretreatment technologies for lignocellulosic biomass: A review of steam explosion and subcritical water hydrolysis. CHEMOSPHERE 2021; 284:131372. [PMID: 34323806 DOI: 10.1016/j.chemosphere.2021.131372] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/26/2021] [Accepted: 06/26/2021] [Indexed: 05/10/2023]
Abstract
The pretreatment of lignocellulosic biomass enhances the conversion efficiency to produce biofuels and value-added chemicals, which have the potential to replace fossil fuels. Compared to physicochemical and other pretreatment techniques, the hydrothermal methods are considered eco-friendly and cost-effective. This paper reviews the strengths, weaknesses, opportunities and threats of steam explosion and subcritical water hydrolysis as the two promising hydrothermal technologies for the pretreatment of lignocellulosic biomass. Although the principle of the steam explosion in depolymerizing the lignin and exposing the cellulose fibers for bioconversion to liquid fuels is well known, its underlying mechanism for solid biofuel production is less identified. Therefore, this review provides an insight into different operating conditions of steam explosion and subcritical water hydrolysis for a wide variety of feedstocks. The mechanisms of subcritical water hydrolysis including dehydration, decarboxylation and carbonization of waste biomass are comprehensively described. Finally, the role of microwave heating in the hydrothermal pretreatment of biomass is elucidated.
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Affiliation(s)
- Tumpa R Sarker
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Falguni Pattnaik
- Center for Rural Development and Technology, Indian Institute of Technology Delhi, New Delhi, India
| | - Sonil Nanda
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Ajay K Dalai
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
| | - Venkatesh Meda
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Satyanarayan Naik
- Center for Rural Development and Technology, Indian Institute of Technology Delhi, New Delhi, India
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Kang X, Wang YY, Wang S, Song X. Xylan and xylose decomposition during hot water pre-extraction: A pH-regulated hydrolysis. Carbohydr Polym 2021; 255:117391. [PMID: 33436220 DOI: 10.1016/j.carbpol.2020.117391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 11/19/2022]
Abstract
One of the key issues in the development of biofuels using lignocellulosic feedstocks is to increase the yield of fermented sugar, and simultaneously decrease the generation of fermentation inhibitors. Therefore, it is essential to understand the degradation mechanism of xylan during hot-water pretreatment. We analyzed the hydrothermal degradation products of xylan and xylose under different conditions. Results showed that furfural and formic acid formed from xylose reached a maximum value of 32.56 % and 35.14 %, respectively. By increasing the initial pH of the xylan solution, the furfural concentration can be reduced effectively to 2% and the formation of formic acid was preferred under alkaline conditions. On this basis, we proposed a new hydrothermal degradation pathway of xylan in alkaline solution. The in-depth understanding of xlyan degradation during hot water pre-treatment will be beneficial for improving the efficiency of biofuel production.
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Affiliation(s)
- Xiheng Kang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Yun-Yan Wang
- Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, 37996, USA
| | - Shuangfei Wang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Xueping Song
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China; Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, 37996, USA.
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7
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Effect of Severity Factor on the Subcritical Water and Enzymatic Hydrolysis of Coconut Husk for Reducing Sugar Production. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2020. [DOI: 10.9767/bcrec.15.3.8870.786-797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one of the challenges for fermentable sugar production. In this study, the performance of subcritical water (SCW) and enzymatic hydrolysis of coconut husk toward reducing sugar production was investigated using a severity factor (SF) approach. Furthermore, the optimal condition of SCW was optimized using response surface methodology (RSM), where the composition changes of lignocellulose and sugar yield as responses. From the results, at low SF of SCW, sugar yield escalated as increasing SF value. In the enzymatic hydrolysis process, the effect of SCW pressure is a significant factor enhancing sugar yield. A maximum total sugar yield was attained on the mild SF condition of 2.86. From this work, it was known that the SF approach is sufficient parameter to evaluate the SCW and enzymatic hydrolysis of coconut husk. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Antioxidant Molecules from Plant Waste: Extraction Techniques and Biological Properties. Processes (Basel) 2020. [DOI: 10.3390/pr8121566] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The fruit, vegetable, legume, and cereal industries generate many wastes, representing an environmental pollution problem. However, these wastes are a rich source of antioxidant molecules such as terpenes, phenolic compounds, phytosterols, and bioactive peptides with potential applications mainly in the food and pharmaceutical industries, and they exhibit multiple biological properties including antidiabetic, anti-obesity, antihypertensive, anticancer, and antibacterial properties. The aforementioned has increased studies on the recovery of antioxidant compounds using green technologies to value plant waste, since they represent more efficient and sustainable processes. In this review, the main antioxidant molecules from plants are briefly described and the advantages and disadvantages of the use of conventional and green extraction technologies used for the recovery and optimization of the yield of antioxidant naturals are detailed; finally, recent studies on biological properties of antioxidant molecules extracted from plant waste are presented here.
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9
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Effect of pretreatment on the ethanol and fusel alcohol production during fermentation of sugarcane press-mud. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107668] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Santos MSND, Zabot GL, Mazutti MA, Ugalde GA, Rezzadori K, Tres MV. Optimization of subcritical water hydrolysis of pecan wastes biomasses in a semi-continuous mode. BIORESOURCE TECHNOLOGY 2020; 306:123129. [PMID: 32172095 DOI: 10.1016/j.biortech.2020.123129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 06/10/2023]
Abstract
Pecan cultivation has increased in recent years. Consequently, the amount of lignocellulosic residuals from its production has expanded. Thus, there is a necessity to explore and add value to their coproducts. The objective of this work was to obtain reducing sugars from pecan biomasses by the optimization of the subcritical water hydrolysis technology in a semi-continuous mode and the physicochemical and morphological characterization of these materials, such as SEM, TGA and FT-IR analysis. Temperatures of 180, 220 and 260 °C, water/solids mass ratio of 15 and 30 g water/g biomass and total reaction time of 15 min were used. The highest reducing sugar yield was 27.1 g/100 g of biomass, obtained at 220 °C and R-15 for pecan shells. TGA, SEM and FT-IR analysis indicated the modifications of structures and compositions of biomasses in fresh and hydrolyzed samples.
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Affiliation(s)
- Maicon S N Dos Santos
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), Sete de Setembro St., 1040, Cachoeira do Sul, RS 96508-010, Brazil
| | - Giovani L Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), Sete de Setembro St., 1040, Cachoeira do Sul, RS 96508-010, Brazil
| | - Marcio A Mazutti
- Departament of Chemical Engineering, Federal University of Santa Maria (UFSM), Roraima Av., 1000, Santa Maria, RS 97105-900, Brazil
| | - Gustavo A Ugalde
- Laboratory of Integrated Pest Management (LabMIP), Federal University of Santa Maria (UFSM), Roraima Av., 1000, Santa Maria, RS 97105-900, Brazil
| | - Katia Rezzadori
- Institute of Food Science and Technology (ICTA), Federal University of Rio Grande do Sul (UFRGS), Paulo Gama Av., 110, Porto Alegre, RS 90040-060, Brazil
| | - Marcus V Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), Sete de Setembro St., 1040, Cachoeira do Sul, RS 96508-010, Brazil.
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11
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Qi N, Hu X, Xin X, Ye S, Fu Z, Zhao X. Mechanisms of biohydrogen recovery enhancement from peanut shell by C. guangxiense: Temperature pretreatment ranges from -80 to 100 °C. BIORESOURCE TECHNOLOGY 2020; 304:123026. [PMID: 32127244 DOI: 10.1016/j.biortech.2020.123026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
The potential of low-cost bioenergy recovery from peanut shell was limited for its complex cellulose structure. In order to enhance the total reducing sugar (TRS) yield for bio-H2 production, peanut shell with heat (HT, 50-100 °C) or freezing pretreatment (FT, -80 to 0 °C) under different duration (0.5-12 h) was investigated. For uncovering the enhancement mechanisms, morphological feature and crystalline structure were analyzed by scanning electron microscope (SEM) and X-ray powder diffraction (XRD). The optimal pretreatment of 50 °C for 12 h was obtained with TRS yield increased 73.6%, while the H2 yield of 1.25 ml/mg-TRS was peaked with pretreatment at -80 °C. The SEM and XRD further demonstrated that mechanisms of HT and FT were realized through different ways, which were cracking and collapsing in HT, and delamination and peeling in FT, respectively.
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Affiliation(s)
- Nan Qi
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, and School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Xiaomin Hu
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, and School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Xiaotong Xin
- College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
| | - Sicen Ye
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, and School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Zhongtian Fu
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, and School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Xin Zhao
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, and School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China.
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Recent advances in subcritical water and supercritical carbon dioxide extraction of bioactive compounds from plant materials. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.01.014] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Autocatalytic hydrothermal pretreatment by recycling byproduct organic acids to directionally depolymerize cassava straw. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Rapid Processing of Abandoned Oil Palm Trunks into Sugars and Organic Acids by Sub-Critical Water. Processes (Basel) 2019. [DOI: 10.3390/pr7090593] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Abandoned oil palm trunk (OPT) is among the most abundant left-over biomass in Malaysia and is allowed to decompose naturally in the field. However, the recycling of OPT is less considered although OPT is a bioresource that has a high potential for conversion into value-added products. In this study, waste OPT was rapidly converted by hydrolysis using subcritical water (sub-CW). This work is the first attempt to explore the utilization of waste OPT based on the differences in moisture, cellulose and hemicellulose contents in the top and bottom segments, and from various ages of the waste OPT. 21- and 35-year-old OPTs were divided into top and bottom sections. The OPTs was subjected to sub-CW at a heating rate of 3.8 °C/s at various temperatures and times. The 21-year-old OPT was superior to the 35-year-old OPT for conversion into sugar and organic acid. The yield of the total sugar was between 0.41 and 0.77 kg/kg-OPT in the bottom and top sections. The excellent correlation between the sugar yield and sub-CW ion product (Kw) signified that the sub-CW facilitated the hydrolysis of hemicellulose and cellulose in the OPT. In the bottom segment, fructose had a higher yield, while in the top part glucose was dominant. Sugar degradation from the sub-CW treatment of OPT produced 0.2 kg/kg-OPT organic acids. The treatment of OPT using sub-CW showed promising results in producing sugars and organic acids.
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Mohd Thani N, Mustapa Kamal SM, Sulaiman A, Taip FS, Omar R, Izhar S. Sugar Recovery from Food Waste via Sub-critical Water Treatment. FOOD REVIEWS INTERNATIONAL 2019. [DOI: 10.1080/87559129.2019.1636815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Nurfatimah Mohd Thani
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Siti Mazlina Mustapa Kamal
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Alifdalino Sulaiman
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Farah Saleena Taip
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Rozita Omar
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
| | - Shamsul Izhar
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia
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Abaide ER, Dotto GL, Tres MV, Zabot GL, Mazutti MA. Adsorption of 2-nitrophenol using rice straw and rice husks hydrolyzed by subcritical water. BIORESOURCE TECHNOLOGY 2019; 284:25-35. [PMID: 30925420 DOI: 10.1016/j.biortech.2019.03.110] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 06/09/2023]
Abstract
The potential of rice husks and straw as adsorbents after being processed by subcritical water hydrolysis (SWH) was investigated. The influences of temperature (453, 493 and 533 K) and liquid/solid ratio (7.5 and 15 g water/g biomass) on the rice straw and rice husks characteristics and on the adsorption capacity of 2-nitrophenol were evaluated at pH 4 and 7. Adsorption kinetics, equilibrium and thermodynamic parameters were also studied. The adsorption capacity was favored at pH 7. Pseudo-first-order model was suitable to predict the kinetic curves for 2-nitrophenol concentrations of 25, 50, 75 and 100 mg/L and the isotherm data obeyed the Freundlich model. Overall, the thermodynamic results revealed a spontaneous and exothermic process. The maximum adsorption capacity (92.97 ± 1.31 mg/g) was obtained for rice straw that has undergone an SWH at 453 K and 7.5 g water/g straw. The integration of processes to valorize co-products can make the production of cellulosic bioethanol more feasible.
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Affiliation(s)
- Ederson R Abaide
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil; Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St., Center DC, Cachoeira do Sul, RS 96508-010, Brazil
| | - Guilherme L Dotto
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Marcus V Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St., Center DC, Cachoeira do Sul, RS 96508-010, Brazil
| | - Giovani L Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St., Center DC, Cachoeira do Sul, RS 96508-010, Brazil.
| | - Marcio A Mazutti
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil
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Cho YJ, Getachew AT, Saravana PS, Chun BS. Optimization and characterization of polysaccharides extraction from Giant African snail (Achatina fulica) using pressurized hot water extraction (PHWE). ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.bcdf.2019.100179] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Subcritical water hydrolysis of brewer’s spent grains: Selective production of hemicellulosic sugars (C-5 sugars). J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2018.11.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Abaide ER, Ugalde G, Di Luccio M, Moreira RDFPM, Tres MV, Zabot GL, Mazutti MA. Obtaining fermentable sugars and bioproducts from rice husks by subcritical water hydrolysis in a semi-continuous mode. BIORESOURCE TECHNOLOGY 2019; 272:510-520. [PMID: 30391844 DOI: 10.1016/j.biortech.2018.10.075] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/25/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
This work aimed at producing fermentable sugars and bioproducts from rice husks by subcritical water hydrolysis at 25 MPa in a semi-continuous mode. The influences of temperature (180 °C; 220 °C; 260 °C) and liquid/solid ratio (7.5 g water/g husks; 15 g water/g husks) on reducing sugar yield (YRS), efficiency (E), kinetic profiles (0-15 min), composition of sugars, inhibitors and organic acids, and physicochemical characteristics of the remaining solid material were evaluated and discussed in the work. The highest YRS (18.0 ± 2.9 g/100 g husks) and E (39.5 ± 1.7 g sugars/100 g carbohydrates) were obtained at 220 °C and 7.5 gwater/g husks. In such condition, the hydrolyzed solutions presented cellobiose (18.0 g/L), xylose 17.7 g/L), arabinose (3.6 g/L), glucose (1.5 g/L), and levulinic acid (0.7 g/L). The fermentable sugars and bioproducts can be applied in several industrial fields, especially for the production of bioethanol and other higher value-added chemical compounds.
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Affiliation(s)
- Ederson R Abaide
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil; Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St, Center DC, Cachoeira do Sul - RS 96508-010, Brazil
| | - Gustavo Ugalde
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Marco Di Luccio
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, SC 88040-900, Brazil
| | - Regina de F P M Moreira
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, SC 88040-900, Brazil
| | - Marcus V Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St, Center DC, Cachoeira do Sul - RS 96508-010, Brazil
| | - Giovani L Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria (UFSM), 1040, Sete de Setembro St, Center DC, Cachoeira do Sul - RS 96508-010, Brazil.
| | - Marcio A Mazutti
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil
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20
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Lyu H, Zhou J, Lyu C, Meng F, Geng Z, Zhang M. Exploration and optimization of mixed acid synergistic catalysis pretreatment for maximum C5 sugars. BIORESOURCE TECHNOLOGY 2018; 260:53-60. [PMID: 29614451 DOI: 10.1016/j.biortech.2018.03.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/06/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
The liquid hot water (LHW) pretreatment could be strengthened by acetic and lactic acids produced from the process. The synergistic effect of the mixed acid catalyst of lactic acid and acetic acid was investigated for the purpose of maximization of the overall C5 sugars yield. Individual acids (acetic and lactic acid) and mixed acid were used to strengthen the LHW pretreatment at different conditions. The results showed that the suitable conditions of mixed acid synergistic catalysis was at 180 °C for 60 min and 3 wt% mixed acid where the ratio of 40% (i.e. 0.40 in mass fraction of lactic acid in mixed acid). Response surface methodology (RSM) was applied to further optimize this process. The highest yield of C5 sugars of 93.83% according to theoretical predicted model, was close to the experiment value of 92.53% at 177 °C for 67 min and with the ratio of mixed acid of 40%.
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Affiliation(s)
- Huisheng Lyu
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Jinyi Zhou
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Chunliu Lyu
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Fanmei Meng
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Zhongfeng Geng
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Minhua Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
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21
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Porous carbonaceous materials from hydrothermal carbonization and KOH activation of corn stover for highly efficient CO2 capture. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2017.1367671] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Lachos-Perez D, Tompsett GA, Guerra P, Timko MT, Rostagno MA, Martínez J, Forster-Carneiro T. Sugars and char formation on subcritical water hydrolysis of sugarcane straw. BIORESOURCE TECHNOLOGY 2017; 243:1069-1077. [PMID: 28764113 DOI: 10.1016/j.biortech.2017.07.080] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 06/07/2023]
Abstract
Subcritical water has potential as an environmentally friendly solvent for applications including hydrolysis, liquefaction, extraction, and carbonization. Here, we report hydrolysis of sugarcane straw, an abundant byproduct of sugar production, in a semi-continuous reactor at reaction temperatures ranging from 190 to 260°C and at operating pressures of 9 and 16MPa. The target hydrolysis products were total reducing sugars. The main products of sugarcane straw hydrolysis were glucose, xylose, arabinose, and galactose in addition to 5- hydroxymethylfurfural and furfural as minor byproducts. Fourier transform infrared spectroscopy and thermogravimetric analysis provided additional information on the surface and bulk composition of the residual biomass. Char was present on samples treated at temperatures equal to and greater than 190°C. Samples treated at 260°C contained approximately 20wt% char, yet retained substantial hemicellulose and cellulose content. Hydrolysis temperature of 200°C provided the greatest TRS yield while minimizing char formation.
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Affiliation(s)
- D Lachos-Perez
- School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato, n. 80, 13083-862 Campinas, SP, Brazil
| | - G A Tompsett
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Goddard Hall 123, Worcester, MA 01609, United States
| | - P Guerra
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Goddard Hall 123, Worcester, MA 01609, United States
| | - M T Timko
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Goddard Hall 123, Worcester, MA 01609, United States
| | - M A Rostagno
- School of Applied Sciences, University of Campinas (UNICAMP), Rua Pedro Zaccaria, n. 1300, 13484-350 Limeira, SP, Brazil
| | - Julian Martínez
- School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato, n. 80, 13083-862 Campinas, SP, Brazil
| | - T Forster-Carneiro
- School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato, n. 80, 13083-862 Campinas, SP, Brazil.
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23
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Jin LQ, Zhao N, Liu ZQ, Liao CJ, Zheng XY, Zheng YG. Enhanced production of xylose from corncob hydrolysis with oxalic acid as catalyst. Bioprocess Biosyst Eng 2017; 41:57-64. [DOI: 10.1007/s00449-017-1843-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 09/21/2017] [Indexed: 02/04/2023]
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24
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Hafid HS, Nor 'Aini AR, Mokhtar MN, Talib AT, Baharuddin AS, Umi Kalsom MS. Over production of fermentable sugar for bioethanol production from carbohydrate-rich Malaysian food waste via sequential acid-enzymatic hydrolysis pretreatment. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 67:95-105. [PMID: 28527863 DOI: 10.1016/j.wasman.2017.05.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 05/08/2017] [Accepted: 05/11/2017] [Indexed: 06/07/2023]
Abstract
In Malaysia, the amount of food waste produced is estimated at approximately 70% of total municipal solid waste generated and characterised by high amount of carbohydrate polymers such as starch, cellulose, and sugars. Considering the beneficial organic fraction contained, its utilization as an alternative substrate specifically for bioethanol production has receiving more attention. However, the sustainable production of bioethanol from food waste is linked to the efficient pretreatment needed for higher production of fermentable sugar prior to fermentation. In this work, a modified sequential acid-enzymatic hydrolysis process has been developed to produce high concentration of fermentable sugars; glucose, sucrose, fructose and maltose. The process started with hydrothermal and dilute acid pretreatment by hydrochloric acid (HCl) and sulphuric acid (H2SO4) which aim to degrade larger molecules of polysaccharide before accessible for further steps of enzymatic hydrolysis by glucoamylase. A kinetic model is proposed to perform an optimal hydrolysis for obtaining high fermentable sugars. The results suggested that a significant increase in fermentable sugar production (2.04-folds) with conversion efficiency of 86.8% was observed via sequential acid-enzymatic pretreatment as compared to dilute acid pretreatment (∼42.4% conversion efficiency). The bioethanol production by Saccharomyces cerevisiae utilizing fermentable sugar obtained shows ethanol yield of 0.42g/g with conversion efficiency of 85.38% based on the theoretical yield was achieved. The finding indicates that food waste can be considered as a promising substrate for bioethanol production.
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Affiliation(s)
- Halimatun Saadiah Hafid
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Abdul Rahman Nor 'Aini
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Mohd Noriznan Mokhtar
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Ahmad Tarmezee Talib
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Azhari Samsu Baharuddin
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Md Shah Umi Kalsom
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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25
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Liang J, Chen X, Wang L, Wei X, Wang H, Lu S, Li Y. Subcritical carbon dioxide-water hydrolysis of sugarcane bagasse pith for reducing sugars production. BIORESOURCE TECHNOLOGY 2017; 228:147-155. [PMID: 28061397 DOI: 10.1016/j.biortech.2016.12.080] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/09/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Abstract
The aim of present study was to obtain total reducing sugars (TRS) by hydrolysis in subcritical CO2-water from sugarcane bagasse pith (SCBP), the fibrous residue remaining after papermaking from sugarcane bagasse. The optimum hydrolysis conditions were evaluated by L16(45) orthogonal experiments. The TRS yield achieved 45.8% at the optimal conditions: 200°C, 40min, 500rmin-1, CO2 initial pressure of 1MPa and liquid-to-solid ratio of 50:1. Fourier transform infrared spectrometry and two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance were used to characterize hydrolysis liquor, treated and untreated SCBP, resulting in the removal of hemicelluloses to mainly produce xylose, glucose and arabinose during hydrolysis. The severity factors had no correlation to TRS yield, indicating that the simple kinetic processes of biomass solubilisation cannot perfectly describe the SCBP hydrolysis. The first-order kinetic model based on consecutive reaction was used to obtain rate constants, activation energies and pre-exponential factors.
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Affiliation(s)
- Jiezhen Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology of Guangxi, Nanning 530004, China
| | - Xiaopeng Chen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology of Guangxi, Nanning 530004, China.
| | - Linlin Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology of Guangxi, Nanning 530004, China
| | - Xiaojie Wei
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology of Guangxi, Nanning 530004, China
| | - Huasheng Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Songzhou Lu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yunhua Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
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26
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Saravana PS, Getachew AT, Ahmed R, Cho YJ, Lee YB, Chun BS. Optimization of phytochemicals production from the ginseng by-products using pressurized hot water: Experimental and dynamic modelling. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.06.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Sub- and supercritical water hydrolysis of agricultural and food industry residues for the production of fermentable sugars: A review. FOOD AND BIOPRODUCTS PROCESSING 2016. [DOI: 10.1016/j.fbp.2015.11.004] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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28
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Lachos-Perez D, Martinez-Jimenez F, Rezende C, Tompsett G, Timko M, Forster-Carneiro T. Subcritical water hydrolysis of sugarcane bagasse: An approach on solid residues characterization. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.10.019] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Cabeza A, Piqueras CM, Sobrón F, García-Serna J. Modeling of biomass fractionation in a lab-scale biorefinery: Solubilization of hemicellulose and cellulose from holm oak wood using subcritical water. BIORESOURCE TECHNOLOGY 2016; 200:90-102. [PMID: 26476169 DOI: 10.1016/j.biortech.2015.09.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 06/05/2023]
Abstract
Lignocellulose fractionation is a key biorefinery process that need to be understood. In this work, a comprehensive study on hydrothermal-fractionation of holm oak in a semi-continuous system was conducted. The aim was to develop a physicochemical model in order to reproduce the role of temperature and water flow over the products composition. The experiments involved two sets: at constant flow (6mL/min) and two different ranges of temperature (140-180 and 240-280°C) and at a constant temperature range (180-260°C) and different flows: 11.0, 15.0 and 27.9mL/min. From the results, temperature has main influence and flow effect was observed only if soluble compounds were produced. The kinetic model was validated against experimental data, reproducing the total organic carbon profile (e.g. deviation of 33%) and the physicochemical phenomena observed in the process. In the model, it was also considered the variations of molecular weight of each biopolymer, successfully reproducing the biomass cleaving.
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Affiliation(s)
- A Cabeza
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain
| | - C M Piqueras
- Planta Piloto de Ingeniería Química, PLAPIQUI-Universidad Nacional del Sur-CONICET, Camino La Carrindanga km 7, 8000 Bahía Blanca, Buenos Aires, Argentina
| | - F Sobrón
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain
| | - J García-Serna
- High Pressure Processes Group, Department of Chemical Engineering and Environmental Tech., University of Valladolid, 47011 Valladolid, Spain.
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30
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Mohan M, Banerjee T, Goud VV. Hydrolysis of bamboo biomass by subcritical water treatment. BIORESOURCE TECHNOLOGY 2015; 191:244-252. [PMID: 26000834 DOI: 10.1016/j.biortech.2015.05.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 06/04/2023]
Abstract
The aim of present study was to obtain total reducing sugars (TRS) from bamboo under subcritical water (SCW) treatment in a batch reactor at the temperature ranging from 170 °C to 220 °C and 40 min hydrolysis time. Experiments were performed to investigate the effects of temperature and time on TRS yield. The maximum TRS yield (42.21%) was obtained at lower temperature (180 °C), however longer reaction time (25 min). X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) analysis were used to characterise treated and untreated bamboo samples. The XRD profile revealed that crystallinity of bamboo increased to 71.90% with increase in temperature up to 210 °C and decreased thereafter to 70.92%. The first-order reaction kinetic model was used to fit the experimental data to obtain rate constants. From the Arrhenius plot, activation energy and pre-exponential factor at 25 min time were found to be 17.97 kJ mol(-1) and 0.154 min(-1), respectively.
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Affiliation(s)
- Mood Mohan
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Tamal Banerjee
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| | - Vaibhav V Goud
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
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31
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Mohan M, Timung R, Deshavath NN, Banerjee T, Goud VV, Dasu VV. Optimization and hydrolysis of cellulose under subcritical water treatment for the production of total reducing sugars. RSC Adv 2015. [DOI: 10.1039/c5ra20319h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Subcritical water (SCW) treatment has gained enormous attention as an environmentally friendly technique for organic matter and an attractive reaction medium for a variety of applications. In the current work the process parameters were optimized by RSM model.
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Affiliation(s)
- Mood Mohan
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Robinson Timung
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | | | - Tamal Banerjee
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Vaibhav V. Goud
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati
- India
- Centre for the Environment
| | - Venkata V. Dasu
- Centre for the Environment
- Indian Institute of Technology Guwahati
- Guwahati
- India
- Department of Biosciences and Bioengineering
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