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Production of a halotolerant endo-1,4-β-glucanase by a newly isolated Bacillus velezensis H1 on olive mill wastes without pretreatment: purification and characterization of the enzyme. Arch Microbiol 2022; 204:681. [DOI: 10.1007/s00203-022-03300-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/07/2022] [Accepted: 10/21/2022] [Indexed: 11/25/2022]
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2
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Shi F, Wang Y, Davaritouchaee M, Yao Y, Kang K. Directional Structure Modification of Poplar Biomass-Inspired High Efficacy of Enzymatic Hydrolysis by Sequential Dilute Acid-Alkali Treatment. ACS OMEGA 2020; 5:24780-24789. [PMID: 33015496 PMCID: PMC7528282 DOI: 10.1021/acsomega.0c03419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
A major challenge in converting lignocellulose to biofuel is overcoming the resistance of the biomass structure. Herein, sequential dilute acid-alkali/aqueous ammonia treatment was evaluated to enhance enzymatic hydrolysis of poplar biomass by removing hemicellulose first and then removing lignin with acid and base, respectively. The results show that glucose release in sequential dilute acid-alkali treatments (61.4-71.4 mg/g) was 7.3-24.8% higher than sequential dilute acid-aqueous ammonia treatments (57.2-61.8 mg/g) and 283.8-346.3% higher than control (16.0 mg/g), respectively. Dilute acid treatment removed most hemicellulose (84.9%) of the biomass, followed by alkaline treatment with 27.5% removal of lignin. Roughness, surface area, and micropore volume of the biomass were crucial for the enzymatic hydrolysis. Furthermore, the ultrastructure changes observed using crystallinity, Fourier transform infrared spectroscopy, thermogravimetric analysis, and pyrolysis gas chromatography/mass spectrometry support the effects of sequential dilute acid-alkali treatment. The results provide an efficient approach to facilitate a better enzymatic hydrolysis of the poplar samples.
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Affiliation(s)
- Fuxi Shi
- College
of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China
| | - Yajun Wang
- Agro-Environmental
Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Maryam Davaritouchaee
- The
Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Yiqing Yao
- College
of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China
| | - Kang Kang
- Institute
for Chemicals and Fuels from Alternative Resources (ICFAR), Western University, 22312 Wonderland Road North, London N0M 2A0, ON, Canada
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3
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Shi L, Ge J, Zhang F, Nie S, Qin C, Yao S. Difference in adsorbable organic halogen formation between phenolic and non-phenolic lignin model compounds in chlorine dioxide bleaching. ROYAL SOCIETY OPEN SCIENCE 2019; 6:191202. [PMID: 31824729 PMCID: PMC6837227 DOI: 10.1098/rsos.191202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 09/20/2019] [Indexed: 06/10/2023]
Abstract
Adsorbable organic halogen (AOX) is generally formed by the reaction of residual lignin in pulps with chlorine dioxide during bleaching. Lignin has a complex structure. Different functional groups and bonds are present in lignin structures. Phenolic hydroxyl is one of the important functional groups in lignin, and it significantly influences the chemical properties and reactivity. To study the effect of phenolic hydroxyl on AOX formation, vanillyl alcohol (VA) was selected as the phenolic lignin model compound, and veratryl alcohol (VE) was selected as the non-phenolic lignin model compound in this study. The kinetics of AOX formation by the reaction of VA or VE with chlorine dioxide was studied. The effects of pH, chlorine dioxide, lignin model compound concentration and reaction temperature on AOX formation are discussed. The activation energies of the reaction of VA and VE with chlorine dioxide are 16 242.47 J mol-1 and 281.34 J mol-1, respectively. Thus, we found that the non-phenolic lignin can react with chlorine dioxide to form AOX more easily than phenolic lignin.
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Affiliation(s)
- Lisheng Shi
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
| | - Jiayan Ge
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
| | - Fuqiang Zhang
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
| | - Shuangxi Nie
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
| | - Chengrong Qin
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
| | - Shuangquan Yao
- College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, People's Republic of China
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4
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Assessing the Potentiality of Animal Fat Based-Bio Phase Change Materials (PCM) for Building Applications: An Innovative Multipurpose Thermal Investigation. ENERGIES 2019. [DOI: 10.3390/en12061111] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In recent years, the implementation of novel solutions aimed at improving thermal energy storage (TES) capability to both energy technologies and building-integrated systems has gained increasing attention. In particular, the application of phase change materials (PCM) is currently gathering worldwide acknowledgment. In this work, the potential of animal fat as a novel bio-based PCM having transition temperature around the ambient temperature is assessed by means of thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and extensive temperature monitoring. Results from the TGA showed the differential degradation of the main components of the animal fat during the heating phase, where three different decomposition steps could be noticed. The thermal monitoring and the DSC analysis demonstrated the promising thermal performance of the material, which showed an interesting double transition range globally associated to a melting enthalpy of about 28.94 kJ·kg - 1 . The obtained results demonstrate the promising thermophysical properties of the animal fat blend, which can be considered as a low-cost, biocompatible PCM, particularly with potential application in passive building envelope applications for a wide range of temperature boundary conditions.
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Pérez A, Blázquez G, Iáñez-Rodríguez I, Osegueda O, Calero M. Optimization of the sugar hydrothermal extraction process from olive cake using neuro-fuzzy models. BIORESOURCE TECHNOLOGY 2018; 268:81-90. [PMID: 30075333 DOI: 10.1016/j.biortech.2018.07.136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
The optimization of the hydrothermal extraction step in the biorefinery scheme in order to obtain sugars and antioxidants from olive cake was carried out. This process using water and low temperatures for the olive cake has not been previously studied by other authors. Central Composite Design of experiments was carried out. Four variables and three levels for each variable were tested: temperature (50, 70 and 90 °C) time (60, 120, 180 min), average particle diameter (0.42, 0.96 and 1.5 mm) and solid/liquid ratio (0.15, 0.20, 0.25). The main aim was to understand the relationship between the process variables and the yield of extraction of glucose, xylose, polyphenols and oligomers. The variables which most influenced the process were particle diameter and solid/liquid ratio. The experimental values were adjusted to a classical polynomial model and to a neuro-fuzzy system. The neuro-fuzzy demonstrated to be much more accurate when predicting the experimental values.
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Affiliation(s)
- A Pérez
- Department of Chemical Engineering, Avenida Fuentenueva s/n, University of Granada, 18071 Granada, Spain
| | - G Blázquez
- Department of Chemical Engineering, Avenida Fuentenueva s/n, University of Granada, 18071 Granada, Spain
| | - I Iáñez-Rodríguez
- Department of Chemical Engineering, Avenida Fuentenueva s/n, University of Granada, 18071 Granada, Spain.
| | - O Osegueda
- Department of Process Engineering and Environmental Sciences, Universidad Centroamericana "José Simeón Cañas", El Salvador
| | - M Calero
- Department of Chemical Engineering, Avenida Fuentenueva s/n, University of Granada, 18071 Granada, Spain
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6
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Quesada L, Pérez A, Calero M, Blázquez G, Martín-Lara MA. Kinetic study of thermal degradation of olive cake based on a scheme of fractionation and its behavior impregnated of metals. BIORESOURCE TECHNOLOGY 2018; 261:104-116. [PMID: 29654995 DOI: 10.1016/j.biortech.2018.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
This research aims to provide a better knowledge of the thermal decomposition of the olive cake as well as this lignocellulosic material loaded, in a previous stage of biosorption, with heavy metals for its use in processes of energy recovery. Firstly, isolation of constituents of the olive cake was carried out. Then, experiments were performed by thermogravimetric analysis (TGA) and differential thermogravimetry (DTG) under inert and oxidative atmosphere at a heating rate of 15 K/min for each isolated fraction. Next, adequate reactions schemes were proposed to find kinetic parameters. Validation of these schemes were verified by the goodness of fitting between experimental and simulated data. Also, some important combustion characteristics such as ignition and burnout temperatures were determined. With regard to the effect of metals, cadmium, copper, chromium, nickel and lead present in metal-loaded olive cake did not modify values of kinetic parameters which described the thermal decomposition processes.
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Affiliation(s)
- L Quesada
- Department of Chemical Engineering, Avenida Fuentenueva, s/n, University of Granada, 18071 Granada, Spain
| | - A Pérez
- Department of Chemical Engineering, Avenida Fuentenueva, s/n, University of Granada, 18071 Granada, Spain.
| | - M Calero
- Department of Chemical Engineering, Avenida Fuentenueva, s/n, University of Granada, 18071 Granada, Spain
| | - G Blázquez
- Department of Chemical Engineering, Avenida Fuentenueva, s/n, University of Granada, 18071 Granada, Spain
| | - M A Martín-Lara
- Department of Chemical Engineering, Avenida Fuentenueva, s/n, University of Granada, 18071 Granada, Spain
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7
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Ren X, Chen J, Li G, Wang Y, Lang X, Fan S. Thermal oxidative degradation kinetics of agricultural residues using distributed activation energy model and global kinetic model. BIORESOURCE TECHNOLOGY 2018; 261:403-411. [PMID: 29684870 DOI: 10.1016/j.biortech.2018.04.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 06/08/2023]
Abstract
The study concerned the thermal oxidative degradation kinetics of agricultural residues, peanut shell (PS) and sunflower shell (SS). The thermal behaviors were evaluated via thermogravimetric analysis and the kinetic parameters were determined by using distributed activation energy model (DAEM) and global kinetic model (GKM). Results showed that thermal oxidative decomposition of two samples processed in three zones; the ignition, burnout, and comprehensive combustibility between two agricultural residues were of great difference; and the combustion performance could be improved by boosting heating rate. The activation energy ranges calculated by the DAEM for the thermal oxidative degradation of PS and SS were 88.94-145.30 kJ mol-1 and 94.86-169.18 kJ mol-1, respectively. The activation energy obtained by the GKM for the oxidative decomposition of hemicellulose and cellulose was obviously lower than that for the lignin oxidation at identical heating rate. To some degree, the determined kinetic parameters could acceptably simulate experimental data.
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Affiliation(s)
- Xiu'e Ren
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; Department of Chemistry and Pharmacy, Zhuhai College of Jilin University, Zhuhai 519041, Guangdong, China
| | - Jianbiao Chen
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China.
| | - Gang Li
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Yanhong Wang
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Xuemei Lang
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Shuanshi Fan
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
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8
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López R, Díaz MJ, González-Pérez JA. Extra CO 2 sequestration following reutilization of biomass ash. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 625:1013-1020. [PMID: 29996398 DOI: 10.1016/j.scitotenv.2017.12.263] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/21/2017] [Accepted: 12/21/2017] [Indexed: 05/13/2023]
Abstract
Although combustion ashes are usually used in soils, little attention is paid to the CO2 sequestration potential of this practice. The present study aims to quantify carbon sequestration as carbonate compounds in a tailored synthetic calcareous soil treated with biomass ash from a gasification power plant that uses olive cake. It is estimated that after ash amendment, 14.5g CO2 remained fixed per kg of fly biomass ash, 16.5g CO2 per kg of bottom biomass ash with plant cultivation and 19.7g CO2 per kg of bottom biomass ash without plant cultivation. This inorganic C fixation plus the organic (black) C contained in the ashes made the reutilization of ashes as K fertilizer a relevant practice due to its C resilience and rate, with a yearly C sequestering potential of ca. 8% of 'Soil carbon 4 per mille' goal, an initiative launched at the COP21.
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Affiliation(s)
- Rafael López
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS, CSIC), Avda. Reina Mercedes 10, 41012 Sevilla, Spain.
| | - M Jesús Díaz
- Departamento de Ingeniería Química, Química Física y Ciencias de los Materiales, Facultad de Ciencias Experimentales, Univ. de Huelva, Campus Universitario El Carmen, Avenida de las Fuerzas Arm adas, 21071 Huelva, Spain.
| | - José A González-Pérez
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS, CSIC), Avda. Reina Mercedes 10, 41012 Sevilla, Spain.
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9
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Zhou B, Zhou J, Zhang Q. Research on pyrolysis behavior of Camellia sinensis branches via the Discrete Distributed Activation Energy Model. BIORESOURCE TECHNOLOGY 2017; 241:113-119. [PMID: 28551431 DOI: 10.1016/j.biortech.2017.05.083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/14/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Abstract
This study aims at investigating the pyrolysis behavior of Camellia sinensis branches by the Discrete Distributed Activation Energy Model (DAEM) and thermogravimetric experiments. Then the Discrete DAEM method is used to describe pyrolysis process of Camellia sinensis branches dominated by 12 characterized reactions. The decomposition mechanism of Camellia sinensis branches and interaction with components are observed. And the reaction at 350.77°C is a significant boundary of the first and second reaction range. The pyrolysis process of Camellia sinensis branches at the heating rate of 10,000°C/min is predicted and provides valuable references for gasification or combustion. The relationship and function between four typical indexes and heating rates from 10 to 10,000°C/min are revealed.
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Affiliation(s)
- Bingliang Zhou
- Materials Science & Engineering College, Nanjing Forestry University, Nanjing 210037, China
| | - Jianbin Zhou
- Materials Science & Engineering College, Nanjing Forestry University, Nanjing 210037, China
| | - Qisheng Zhang
- Materials Science & Engineering College, Nanjing Forestry University, Nanjing 210037, China.
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10
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Bartocci P, Barbanera M, D'Amico M, Laranci P, Cavalaglio G, Gelosia M, Ingles D, Bidini G, Buratti C, Cotana F, Fantozzi F. Thermal degradation of driftwood: Determination of the concentration of sodium, calcium, magnesium, chlorine and sulfur containing compounds. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 60:151-157. [PMID: 27596944 DOI: 10.1016/j.wasman.2016.08.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/04/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
The annual production of driftwood in Italy has been estimated to be more than 60,000 tonnes. This wood can be used as an energy source. Particular attention should be paid to its content of alkali and alkaline earth metals, sulfur and chlorine. Few works are available in the literature on this topic. For this reason, the authors propose experimental tests of combustion, gasification and pyrolysis, to evaluate the fate of alkali and alkaline earth metals, sulfur and chlorine in the solid residues and compare the three thermal degradation technologies. The results show a release of alkaline earth metals of about 45% of the initial quantity for gasification and a release of 55% of the initial quantity for combustion (while pyrolysis at 600°C has a very low release). The release of sodium is about 65% for gasification and 80% for combustion. It can be seen that the release of sodium is higher than that of alkaline earth metals; this is due to the divalency of the last ones. Dealing with the release of major elements (chlorine, sulfur and AAEMs) the tests have shown that pyrolysis process is a low emitting technology.
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Affiliation(s)
- P Bartocci
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy.
| | - M Barbanera
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - M D'Amico
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - P Laranci
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - G Cavalaglio
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - M Gelosia
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - D Ingles
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - G Bidini
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - C Buratti
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - F Cotana
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
| | - F Fantozzi
- Department of Engineering, University of Perugia, Via G. Duranti, 06125 Perugia, Italy
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