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Bian X, Ma L, Yang C, Zhang F, Zhang S, Li Y, Gao K, Liu B, Wang Z. Synthesis and properties of bio-based semi-aromatic heat-resistant copolymer polyamide 5T-co-6T. Des Monomers Polym 2024; 27:87-102. [PMID: 39139779 PMCID: PMC11321112 DOI: 10.1080/15685551.2024.2390700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Accepted: 08/06/2024] [Indexed: 08/15/2024] Open
Abstract
Herein, poly(pentanediamine terephthalamide) (PA5T) homopolymer was synthesized via a salt-forming reaction+solid state polycondensation method using bio-based 1,5-pentanediamine and terephthalic acid as the primary raw materials. To address the issue of its narrower processing window, poly(hexamethylene terephthalamide)(PA6T), which also cannot be melt processed due to the processing window is negative, was introduced into its molecular chain to synthesize poly (pentanediamine/hexanediamine terephthaloyl) (PA5T-co-6T) copolymers. The structures were investigated by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance carbon spectroscopy (13C-NMR). Furthermore, the melting temperature, crystallization temperature, thermal stability, and crystal growth mode of the polymer were tested and analyzed using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and wide-angle x-ray diffraction (WAXD), respectively. The results demonstrate that the crystal growth mode gradually changes from three-dimensional spherical growth to two-dimensional disk-like or three-dimensional spherical growth with the increase of 6T chain segment content. Simultaneously, the crystallization temperature, melting temperature, and crystallization rate of the polymer all showed a trend of decreasing first and then increasing, which was due to the combined effects of the increase in the content of 6T chain segments on the molecular-chain structure and crystal structure of the polymer. Bio-based PA5T-co-6T has excellent heat resistance and a wider processing window than PA5T and PA6T, which possesses great application prospects in the fields of automotive, electronic appliances, and LED optics.
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Affiliation(s)
- Xiangcheng Bian
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Liqun Ma
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Chen Yang
- Research and Development Center, Cathay Biotech Inc, Shanghai, China
| | - Fuchun Zhang
- Research and Development Center, Cathay Biotech Inc, Shanghai, China
| | - Shuo Zhang
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Yuan Li
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Kai Gao
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Bingxiao Liu
- Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, Shanxi, China
| | - Zhongqiang Wang
- Technology center, Guangdong Sinoplast Advanced Material Co. Ltd, Dongguan, Guangdong, China
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Liu B, Zhang S, Ma L, Wu Y, Li C, Wu Z, Bian X, Yan W. Synthesis, characterization and crystallization kinetics of a bio-based, heat-resistance nylon 5T/10T. RSC Adv 2023; 13:17874-17882. [PMID: 37323451 PMCID: PMC10262983 DOI: 10.1039/d3ra02337k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/06/2023] [Indexed: 06/17/2023] Open
Abstract
The rapid consumption of fossil resources and its adverse impact on the environment require the use of bio-based materials to replace petrochemical products. In this study, we present a bio-based, heat-resistant engineering plastic, poly(pentamethylene terephthalamide) (nylon 5T). To address the issues of the narrow processing window and difficulty in melting processing of nylon 5T, we introduced more flexible decamethylene terephthalamide (10T) units to create a copolymer, nylon 5T/10T. The chemical structure was confirmed by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (13C-NMR). We investigated the influence of 10T units on the thermal performance, crystallization kinetics, crystallization activation energy, and crystal structures of the copolymers. Our results demonstrate that the crystal growth mode of nylon 5T is a two-dimensional discoid growth pattern, while nylon 5T/10T exhibits a two-dimensional discoid or three-dimensional spherical growth pattern. The melting temperature, crystallization temperature, and crystallization rate first decrease and then increase, and crystal activation energy first increases and then decreases as a function of 10T units. These effects are attributed to the combined impact of molecular chain structure and polymer crystalline region. Bio-based nylon 5T/10T shows excellent heat resistance (melting temperature > 280 °C) and a wider processing window than nylon 5T and 10T, which is a promising heat-resistant engineering plastic.
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Affiliation(s)
- Bingxiao Liu
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Shuo Zhang
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Liqun Ma
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Yu Wu
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Chao Li
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Zhuo Wu
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Xiangcheng Bian
- Taiyuan Institute of Technology, Department of Materials Engineering Taiyuan 030008 China
| | - Wen Yan
- Public Service Platform for Science and Technology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town 1068 Xueyuan Avenue Shenzhen 518055 PR China
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Lee KH, Lee SK, Lee J, Kim S, Kim SW, Park C, Yoo HY. Energy-efficient glucose recovery from chestnut shell by optimization of NaOH pretreatment at room temperature and application to bioethanol production. ENVIRONMENTAL RESEARCH 2022; 208:112710. [PMID: 35026183 DOI: 10.1016/j.envres.2022.112710] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 01/04/2022] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Biofuel policies are currently being implemented globally to reduce greenhouse gas emissions. The recent European regulation, Renewable Energy Directive (RED) II, states that renewable resources should be used as raw materials. In this study, chestnut shell (CNS), a food processing residue, was utilized as a feedstock for bioethanol production. Statistical optimization was performed to improve biomass-to-glucose conversion (BtG) from the CNS. In order to design an energy-efficient process, the pretreatment was fixed at room temperature in the numerical optimization. The optimal conditions derived from the predicted model are as follows: temperature of 25 °C, reaction time of 2.8 h, and NaOH concentration of 1.9% (w/w). Under optimal conditions, both predicted and experimental BtG were 31.0%, while BtG was approximately 3.3-fold improved compared to the control group (without pretreatment). The recovered glucose was utilized for bioethanol fermentation by Saccharomyces cerevisiae K35 and the ethanol yield was achieved to be 98%. Finally, according to the mass balance based on 1000 g CNS, glucose of 310 g can be recovered by the pretreatment; the bioethanol production was approximately 155 g. This strategy suggests a direction to utilize CNS as a potential feedstock for biorefinery through the design of an economical and energy-efficient pretreatment process by lowering the reaction temperature to room temperature.
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Affiliation(s)
- Kang Hyun Lee
- Department of Biotechnology, Sangmyung University, 20 Hongjimun 2-Gil, Jongno-Gu, Seoul, 03016, Republic of Korea.
| | - Soo Kweon Lee
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea.
| | - Jeongho Lee
- Department of Biotechnology, Sangmyung University, 20 Hongjimun 2-Gil, Jongno-Gu, Seoul, 03016, Republic of Korea.
| | - Seunghee Kim
- Department of Biotechnology, Sangmyung University, 20 Hongjimun 2-Gil, Jongno-Gu, Seoul, 03016, Republic of Korea.
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea.
| | - Chulhwan Park
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea.
| | - Hah Young Yoo
- Department of Biotechnology, Sangmyung University, 20 Hongjimun 2-Gil, Jongno-Gu, Seoul, 03016, Republic of Korea.
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Zhao C, Zheng T, Feng Y, Wang X, Zhang L, Hu Q, Chen J, Wu F, Chen GQ. Engineered Halomonas spp. for production of l-Lysine and cadaverine. BIORESOURCE TECHNOLOGY 2022; 349:126865. [PMID: 35183730 DOI: 10.1016/j.biortech.2022.126865] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Cadaverine, a derivative of l-lysine, has been used as a monomer for the synthesis of bio-based nylon-5,6. This study engineered Halomonas bluephagenesis TD1.0 by blocking the feedback inhibition, overexpressing the key l-lysine synthesis genes, strengthening the l-lysine export system and increasing the supply of oxaloacetate for production of l-lysine in the supernatant and PHB in the cells. Subsequently, cadaverine biosynthetic pathway was constructed in H. campaniensis LC-9 to improve the efficiency of de novo cadaverine biosynthesis which combines l-lysine producing H. bluephagenesis TDL8-68-259 and cadaverine producing H. campaniensis LC-9-ldcC-lysP. When H. campaniensis LC-9-ldcC-lysP was used as a whole cell catalysis for cadaverine production, the conversion efficiency of l-lysine to cadaverine reached 100% in the presence of 0.05% Triton X-100 for cell membrane permeability enhancement, resulting in 118 g L-1 cadaverine formed in the fermentor. Thus, Halomonas spp. have been successfully constructed for l-lysine and cadaverine production.
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Affiliation(s)
- Cuihuan Zhao
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, PR China
| | - Taoran Zheng
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China; Beijing PhaBuilder Biotechnology Co., LTD, Shunyi District, 101399, PR China
| | - Yinghao Feng
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China
| | - Xuan Wang
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, PR China
| | - Lizhan Zhang
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China
| | - Qitiao Hu
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China
| | - Jinchun Chen
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China
| | - Fuqing Wu
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China; MOE Key Lab of Industrial Biocatalysts, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Guo-Qiang Chen
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, PR China; MOE Key Lab of Industrial Biocatalysts, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
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Enhanced Production of Bacterial Cellulose from Miscanthus as Sustainable Feedstock through Statistical Optimization of Culture Conditions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020866. [PMID: 35055692 PMCID: PMC8775938 DOI: 10.3390/ijerph19020866] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/30/2021] [Accepted: 01/10/2022] [Indexed: 01/27/2023]
Abstract
Biorefineries are attracting attention as an alternative to the petroleum industry to reduce carbon emissions and achieve sustainable development. In particular, because forests play an important role in potentially reducing greenhouse gas emissions to net zero, alternatives to cellulose produced by plants are required. Bacterial cellulose (BC) can prevent deforestation and has a high potential for use as a biomaterial in various industries such as food, cosmetics, and pharmaceuticals. This study aimed to improve BC production from lignocellulose, a sustainable feedstock, and to optimize the culture conditions for Gluconacetobacter xylinus using Miscanthus hydrolysates as a medium. The productivity of BC was improved using statistical optimization of the major culture parameters which were as follows: temperature, 29 °C; initial pH, 5.1; and sodium alginate concentration, 0.09% (w/v). The predicted and actual values of BC production in the optimal conditions were 14.07 g/L and 14.88 g/L, respectively, confirming that our prediction model was statistically significant. Additionally, BC production using Miscanthus hydrolysates was 1.12-fold higher than in the control group (commercial glucose). Our result indicate that lignocellulose can be used in the BC production processes in the near future.
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Development of Colorimetric Whole-Cell Biosensor for Detection of Heavy Metals in Environment for Public Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312721. [PMID: 34886449 PMCID: PMC8657268 DOI: 10.3390/ijerph182312721] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022]
Abstract
Heavy metals cause various fetal diseases in humans. Heavy metals from factory wastewater can contaminate drinking water, fish, and crops. Inductively coupled plasma-mass spectrometry (ICP-MS) and atomic absorption spectrometry (AAS) are commonly used to analyze heavy metal contents; however, these methods require pre-treatment processes and are expensive and complex. To overcome these limitations, three metal-sensing materials using a whole-cell biosensor in Escherichia coli (E. coli) were developed. Strains were engineered to harbor three kinds of plasmids containing the copA, zntA, and mer promoters for sensing copper, cadmium, and mercury, respectively. The luciferase (lux) gene was inserted as a reporter into the plasmid, which was later replaced with a fused protein sequence containing OmpA (1–159) and mCherry for optical detection. The constructed strains could detect mercury, cadmium, and copper at 0.1–0.75 ppm, 0.2–0.75 ppm, and 2–7.5 ppm, respectively, with linearity values of 0.99030, 0.99676, and 0.95933, respectively. The immobilization linearity value was 0.99765. Notably, these three heavy metals could be detected by visual analysis of the strains. Overall, these findings establish this novel sensor as a potential approach for heavy metal detection in biological samples and foods.
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Huang Y, Ji X, Ma Z, Łężyk M, Xue Y, Zhao H. Green chemical and biological synthesis of cadaverine: recent development and challenges. RSC Adv 2021; 11:23922-23942. [PMID: 35479032 PMCID: PMC9036910 DOI: 10.1039/d1ra02764f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/29/2021] [Indexed: 11/21/2022] Open
Abstract
Cadaverine has great potential to be used as an important monomer for the development of a series of high value-added products with market prospects. The most promising strategies for cadaverine synthesis involve using green chemical and bioconversion technologies. Herein, the review focuses on the progress and strategies towards the green chemical synthesis and biosynthesis of cadaverine. Specifically, we address the specific biosynthetic pathways of cadaverine from different substrates as well as extensively discussing the origination, structure and catalytic mechanism of the key lysine decarboxylases. The advanced strategies for process intensification, the separation and purification of cadaverine have been summarized. Furthermore, the challenging issues of the environmental, economic, and applicable impact for cadaverine production are also highlighted. This review concludes with the promising outlooks of state-of-the-art applications of cadaverine along with some insights toward their challenges and potential improvements.
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Affiliation(s)
- Yuhong Huang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences Beijing 100190 China
- Zhengzhou Institute of Emerging Industrial Technology Zhengzhou City Henan 450000 China
- Zhongke Langfang Institute of Process Engineering Langfang 065001 China
| | - Xiuling Ji
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Zhanling Ma
- Zhengzhou Institute of Emerging Industrial Technology Zhengzhou City Henan 450000 China
| | - Mateusz Łężyk
- Water Supply and Bioeconomy Division, Faculty of Environmental Engineering and Energy, Poznan University of Technology Berdychowo 4 60-965 Poznan Poland
| | - Yaju Xue
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Hai Zhao
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences Beijing 100190 China
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Lee KH, Lee SK, Lee J, Kim S, Park C, Kim SW, Yoo HY. Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:3772. [PMID: 33916606 PMCID: PMC8038493 DOI: 10.3390/ijerph18073772] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 12/31/2022]
Abstract
Worldwide, about one-third of food produced for human consumption is wasted, which includes byproducts from food processing, with a significant portion of the waste still being landfilled. The aim of this study is to convert chestnut shells (CNSs) from food processing into a valuable resource through bioprocesses. Currently, one of the highest barriers to bioprocess commercialization is low conversion of sugar from biomass, and KOH pretreatment was suggested to improve enzymatic digestibility (ED) of CNS. KOH concentration of 3% (w/w) was determined as a suitable pretreatment solution by a fundamental experiment. The reaction factors including temperature, time and solid/liquid (S/L) ratio were optimized (77.1 g/L CNS loading at 75 °C for 2.8 h) by response surface methodology (RSM). In the statistical model, temperature and time showed a relatively significant effect on the glucan content (GC) and ED, but S/L ratio was not. GC and ED of the untreated CNS were 45.1% and 12.7%, respectively. On the other hand, GC and ED of pretreated CNS were 83.2% and 48.4%, respectively, and which were significantly improved by about 1.8-fold and 3.8-fold compared to the control group. The improved ED through the optimization is expected to contribute to increasing the value of byproducts generated in food processing.
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Affiliation(s)
- Kang Hyun Lee
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (J.L.); (S.K.)
| | - Soo Kweon Lee
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 02841, Korea;
| | - Jeongho Lee
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (J.L.); (S.K.)
| | - Seunghee Kim
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (J.L.); (S.K.)
| | - Chulhwan Park
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Korea
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 02841, Korea;
| | - Hah Young Yoo
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (J.L.); (S.K.)
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Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation. Processes (Basel) 2021. [DOI: 10.3390/pr9030494] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Biorefinery, which utilizes carbon-neutral biomass as a resource, is attracting attention as a significant alternative in a modern society confronted with climate change. In this study, spent coffee grounds (SCGs) were used as the feedstock for lactic acid fermentation. In order to improve sugar conversion, alkali pretreatment was optimized by a statistical method, namely response surface methodology (RSM). The optimum conditions for the alkali pretreatment of SCGs were determined as follows: 75 °C, 3% potassium hydroxide (KOH) and a time of 2.8 h. The optimum conditions for enzymatic hydrolysis of pretreated SCGs were determined as follows: enzyme complex loading of 30-unit cellulase, 15-unit cellobiase and 50-unit mannanase per g biomass and a reaction time of 96 h. SCG hydrolysates were used as the carbon source for Lactobacillus cultivation, and the conversions of lactic acid by L. brevis ATCC 8287 and L. parabuchneri ATCC 49374 were 40.1% and 55.8%, respectively. Finally, the maximum lactic acid production by L. parabuchneri ATCC 49374 was estimated to be 101.2 g based on 1000 g of SCGs through the optimization of alkali pretreatment and enzymatic hydrolysis.
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Lee KH, Jang YW, Kim H, Ki JS, Yoo HY. Optimization of Lutein Recovery from Tetraselmis suecica by Response Surface Methodology. Biomolecules 2021; 11:182. [PMID: 33525716 PMCID: PMC7911107 DOI: 10.3390/biom11020182] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/25/2021] [Accepted: 01/25/2021] [Indexed: 12/11/2022] Open
Abstract
Microalgae have been attracting attention as feedstock for biorefinery because they have various advantages, such as carbon fixation, high growth rate and high energy yield. The bioactive compounds and lutein contained in microalgae are known to be beneficial for human health, especially eye and brain health. In this study, in order to improve the recovery of bioactive extracts including lutein from Tetraselmis suecica with higher efficiency, an effective solvent was selected, and the extraction parameters such as temperature, time and solid loading were optimized by response surface methodology. The most effective solvent for lutein recovery was identified as 100% methanol, and the optimum condition was determined (42.4 °C, 4.0 h and 125 g/L biomass loading) by calculation of the multiple regression model. The maximum content of recovered lutein was found to be 2.79 mg/mL, and the ABTS radical scavenging activity (IC50) and ferric reducing antioxidant power (FRAP) value were about 3.36 mg/mL and 561.9 μmol/L, respectively. Finally, the maximum lutein recovery from T. suecica through statistical optimization was estimated to be 22.3 mg/g biomass, which was 3.1-fold improved compared to the control group.
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Affiliation(s)
| | | | | | - Jang-Seu Ki
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (Y.W.J.); (H.K.)
| | - Hah Young Yoo
- Department of Biotechnology, Sangmyung University, 20, Hongjimun, 2-Gil, Jongno-Gu, Seoul 03016, Korea; (K.H.L.); (Y.W.J.); (H.K.)
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Purification and identification of novel alkaline pectinase PNs31 from Bacillus subtilis CBS31 and its immobilization for bioindustrial applications. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-020-0648-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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An environmentally friendly strategy for cadaverine bio-production: in situ utilization of CO2 self-released from L-lysine decarboxylation for pH control. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2019.12.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Leong YK, Chen CH, Huang SF, Lin HY, Li SF, Ng IS, Chang JS. High-level l-lysine bioconversion into cadaverine with enhanced productivity using engineered Escherichia coli whole-cell biocatalyst. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107547] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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