1
|
Saharan BS, Dhanda D, Mandal NK, Kumar R, Sharma D, Sadh PK, Jabborova D, Duhan JS. Microbial contributions to sustainable paddy straw utilization for economic gain and environmental conservation. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100264. [PMID: 39205828 PMCID: PMC11350505 DOI: 10.1016/j.crmicr.2024.100264] [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] [Indexed: 09/04/2024] Open
Abstract
Paddy straw is a versatile and valuable resource with multifaceted benefits for nutrient cycling, soil health, and climate mitigation. Its role as a rich nutrient source and organic matter significantly enhances soil vitality while improving soil structure and moisture retention. The impact of paddy straw extends beyond traditional agricultural benefits, encompassing the promotion of microbial activity, erosion control, and carbon sequestration, highlighting its crucial role in maintaining ecological balance. Furthermore, the potential of paddy straw in bioenergy is explored, encompassing its conversion into biogas, biofuels, and thermal energy. The inherent characteristics of paddy straw, including its high cellulose, hemicellulose, and lignin content, position it as a viable candidate for bioenergy production through innovative processes like pyrolysis, gasification, anaerobic digestion, and combustion. Recent research has uncovered state-of-the-art techniques and innovative technologies capable of converting paddy straw into valuable products, including sugar, ethanol, paper, and fiber, broadening its potential applications. This paper aims to underscore the possibilities for value creation through paddy straw, emphasizing its potential use in bioenergy, bio-products, and other environmental applications. Therefore, by recognizing and harnessing the value of paddy straw, we can advocate for sustainable farming practices, reduce waste, and pave the way for a resource-efficient circular economy. Incorporating paddy straw utilization into agricultural systems can pave the way for enhanced resource efficiency and a more sustainable circular economy.
Collapse
Affiliation(s)
- Baljeet Singh Saharan
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
- Department of Botany and Plant Physiology (Environmental Science), Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
| | - Deepika Dhanda
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
- Department of Botany and Plant Physiology (Environmental Science), Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
| | - Neelam Kumari Mandal
- Department of Botany, Government P.G. College, Panchkula, Haryana, 134112, India
| | - Ramesh Kumar
- Agriculture Extension, Krishi Vigyan Kendra, Ambala, 133104, India
| | - Deepansh Sharma
- Department of Life Sciences, J C Bose University of Science and Technology, YMCA, Faridabad, 121006, India
| | - Pardeep Kumar Sadh
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa, 125055, India
| | - Dilfuza Jabborova
- Institute of Genetics and Plant Experimental Biology, Uzbekistan Academy of Sciences, Kibray 111208, Uzbekistan
| | - Joginder Singh Duhan
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa, 125055, India
| |
Collapse
|
2
|
Wang J, Ma D, Lou Y, Ma J, Xing D. Optimization of biogas production from straw wastes by different pretreatments: Progress, challenges, and prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:166992. [PMID: 37717772 DOI: 10.1016/j.scitotenv.2023.166992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/09/2023] [Accepted: 09/09/2023] [Indexed: 09/19/2023]
Abstract
Lignocellulosic biomass (LCB) presents a promising feedstock for carbon management due to enormous potential for achieving carbon neutrality and delivering substantial environmental and economic benefit. Bioenergy derived from LCB accounts for about 10.3 % of the global total energy supply. The generation of bioenergy through anaerobic digestion (AD) in combination with carbon capture and storage, particularly for methane production, provides a cost-effective solution to mitigate greenhouse gas emissions, while concurrently facilitating bioenergy production and the recovery of high-value products during LCB conversion. However, the inherent recalcitrant polymer crystal structure of lignocellulose impedes the accessibility of anaerobic bacteria, necessitating lignocellulosic residue pretreatment before AD or microbial chain elongation. This paper seeks to explore recent advances in pretreatment methods for LCB biogas production, including pulsed electric field (PEF), electron beam irradiation (EBI), freezing-thawing pretreatment, microaerobic pretreatment, and nanomaterials-based pretreatment, and provide a comprehensive overview of the performance, benefits, and drawbacks of the traditional and improved treatment methods. In particular, physical-chemical pretreatment emerges as a flexible and effective option for methane production from straw wastes. The burgeoning field of nanomaterials has provoked progress in the development of artificial enzyme mimetics and enzyme immobilization techniques, compensating for the intrinsic defect of natural enzyme. However, various complex factors, such as economic effectiveness, environmental impact, and operational feasibility, influence the implementation of LCB pretreatment processes. Techno-economic analysis (TEA), life cycle assessment (LCA), and artificial intelligence technologies provide efficient means for evaluating and selecting pretreatment methods. This paper addresses current issues and development priorities for the achievement of the appropriate and sustainable utilization of LCB in light of evolving economic and environmentally friendly social development demands, thereby providing theoretical basis and technical guidance for improving LCB biogas production of AD systems.
Collapse
Affiliation(s)
- Jing Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Dongmei Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yu Lou
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Defeng Xing
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| |
Collapse
|
3
|
Abdul Manaf SF, Indera Luthfi AA, Md Jahim J, Harun S, Tan JP, Mohd Shah SS. Sequential detoxification of oil palm fronds hydrolysate with coconut shell activated charcoal and pH controlled in bioreactor for xylitol production. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
4
|
Banu Jamaldheen S, Kurade MB, Basak B, Yoo CG, Oh KK, Jeon BH, Kim TH. A review on physico-chemical delignification as a pretreatment of lignocellulosic biomass for enhanced bioconversion. BIORESOURCE TECHNOLOGY 2022; 346:126591. [PMID: 34929325 DOI: 10.1016/j.biortech.2021.126591] [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: 10/23/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Effective pretreatment of lignocellulosic biomass (LCB) is one of the most important steps in biorefinery, ensuring the quality and commercial viability of the overall bioprocess. Lignin recalcitrance in LCB is a major bottleneck in biological conversion as the polymerization of lignin with hemicellulose hinders enzyme accessibility and further bioconversion to fuels and chemicals. Therefore, there is a need to delignify LCB to ease further bioprocessing. The efficiency of delignification, quality and quantity of the desired products, and generation of inhibitors depend upon the type of pretreatment employed. This review summarizes different single and integrated physicochemical pretreatments for delignification. Additionally, conditions required for effective delignification and the advantages and drawbacks of each method were evaluated. Advances in overcoming the recalcitrance of residual lignin to saccharification and the methods to recover lignin after delignification are also discussed. Efficient lignin recovery and valorization strategies provide an avenue for the sustainable lignocellulose biorefinery.
Collapse
Affiliation(s)
- Sumitha Banu Jamaldheen
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Mayur B Kurade
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Bikram Basak
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Chang Geun Yoo
- Department of Chemical Engineering, State University of New York, College of Environmental Science and Forestry, Syracuse, NY 13210, USA
| | - Kyeong Keun Oh
- Department of Chemical Engineering, Dankook University, Youngin 16890, Gyeonggi-do, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Tae Hyun Kim
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea.
| |
Collapse
|
5
|
Hoang AT, Nizetic S, Ong HC, Chong CT, Atabani AE, Pham VV. Acid-based lignocellulosic biomass biorefinery for bioenergy production: Advantages, application constraints, and perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 296:113194. [PMID: 34243094 DOI: 10.1016/j.jenvman.2021.113194] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 06/14/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
The production of chemicals and fuels from renewable biomass with the primary aim of reducing carbon footprints has recently become one of the central points of interest. The use of lignocellulosic biomass for energy production is believed to meet the main criteria of maximizing the available global energy source and minimizing pollutant emissions. However, before usage in bioenergy production, lignocellulosic biomass needs to undergo several processes, among which biomass pretreatment plays an important role in the yield, productivity, and quality of the products. Acid-based pretreatment, one of the existing methods applied for lignocellulosic biomass pretreatment, has several advantages, such as short operating time and high efficiency. A thorough analysis of the characteristics of acid-based biomass pretreatment is presented in this review. The environmental concerns and future challenges involved in using acid pretreatment methods are discussed in detail to achieve clean and sustainable bioenergy production. The application of acid to biomass pretreatment is considered an effective process for biorefineries that aim to optimize the production of desired products while minimizing the by-products.
Collapse
Affiliation(s)
- Anh Tuan Hoang
- Institute of Engineering, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Viet Nam.
| | - Sandro Nizetic
- University of Split, FESB, Rudjera Boskovica 32, 21000, Split, Croatia
| | - Hwai Chyuan Ong
- Centre for Green Technology, Faculty of Engineering and IT, University of Technology Sydney, NSW, 2007, Australia.
| | - Cheng Tung Chong
- China-UK Low Carbon College, Shanghai Jiao Tong University, Lingang, Shanghai, 201306, China
| | - A E Atabani
- Alternative Fuels Research Laboratroy (AFRL), Energy Division, Department of Mechanical Engineering, Faculty of Engineering, Erciyes University, 38039, Kayseri, Turkey
| | - Van Viet Pham
- Institute of Maritime, Ho Chi Minh City University of Transport, Ho Chi Minh City, Viet Nam.
| |
Collapse
|
6
|
Chaudhary A, Hussain Z, Aihetasham A, El-Sharnouby M, Abdul Rehman R, Azmat Ullah Khan M, Zahra S, Saleem A, Azhar S, Alhazmi A, El Askary A, Sayed S, Ali El Enshasy H, Zulaiha Hanapi S, Qamer S. Pomegranate peels waste hydrolyzate optimization by Response Surface Methodology for Bioethanol production. Saudi J Biol Sci 2021; 28:4867-4875. [PMID: 34466060 PMCID: PMC8381070 DOI: 10.1016/j.sjbs.2021.06.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/25/2021] [Accepted: 06/27/2021] [Indexed: 11/25/2022] Open
Abstract
Unwanted agricultural waste is largely comprised of lignocellulosic substrate which could be transformed into sugars. The production of bioethanol from garbage manifested an agreeable proposal towards waste management as well as energy causation. The goal of this work is to optimize parameters for generation of bioethanol through fermentation by different yeast strains while Saccharomyces cerevisiae used as standard strain. The low cost fermentable sugars from pomegranate peels waste (PPW) were obtained by hydrolysis with HNO3 (1 to 5%). The optimum levels of hydrolysis time and temperature were elucidated via RSM (CCD) ranging from 30 to 60 min and 50 to 100 °C respectively. The result shows that optimum values (g/L) for reducing sugars was 61.45 ± 0.01 while for total carbohydrates was 236 ± 0.01. These values were found when PPW was hydrolyzed with 3% HNO3, at 75 °C for one hour. The hydrolyzates obtained from the dilute HNO3 pretreated PPW yielded a maximum of 0.43 ± 0.04, 0.41 ± 0.03 g ethanol per g of reducing sugars by both Metchnikowia sp. Y31 and M. cibodasensis Y34 at day 7 of ethanologenic experiment. The current study exhibited that by fermentation of dilute HNO3 hydrolyzates of PPW could develop copious amount of ethanol by optimized conditions.
Collapse
Affiliation(s)
- Asma Chaudhary
- Department of Zoology, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
| | - Zawar Hussain
- Department of Zoology, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
| | - Ayesha Aihetasham
- Institute of Zoology, University of the Punjab, Quaid-e-Azam Campus, Lahore, Pakistan
| | - Mohamed El-Sharnouby
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Rahat Abdul Rehman
- Department of Forensic Sciences, University of Health Sciences, Lahore, Pakistan
| | - Muhammad Azmat Ullah Khan
- Department of Biochemistry and Molecular Biology, University of Gujrat, Hafiz Hayat campus. Gujrat, Pakistan
| | - Sarwat Zahra
- Department of Physics, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
| | - Ayesha Saleem
- Department of Zoology, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
| | - Sana Azhar
- Institute of Zoology, University of the Punjab, Quaid-e-Azam Campus, Lahore, Pakistan
| | - Alaa Alhazmi
- Medical Laboratory Technology Department, Jazan University, Jazan, Saudi Arabia
- SMIRES for Consultation in Specialized Medical Laboratories, Jazan University, Jazan, Saudi Arabia
| | - Ahmad El Askary
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Samy Sayed
- Department of Science and Technology, University College-Ranyah, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Hesham Ali El Enshasy
- Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia (UTM), Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Johor, Malaysia
- City of Scientific Research and Technology Applications (SRTA), New Burg Al Arab, Alexandria, Egypt
| | - Siti Zulaiha Hanapi
- Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia (UTM), Skudai, Johor, Malaysia
| | - Samina Qamer
- Department of Zoology, Government College University, Faisalabad, Pakistan
| |
Collapse
|
7
|
Sunwoo IY, Sukwong P, Park YR, Jeong DY, Kim SR, Jeong GT, Kim SK. Enhancement of Galactose Uptake from Kappaphycus alvarezii Hydrolysate Using Saccharomyces cerevisiae Through Overexpression of Leloir Pathway Genes. Appl Biochem Biotechnol 2020; 193:335-348. [PMID: 32959326 DOI: 10.1007/s12010-020-03422-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/11/2020] [Indexed: 12/24/2022]
Abstract
A total 42.68 g/L monosaccharide with 0.10 g/L HMF was obtained from 10% (w/v) Kappaphycus alvarezii with thermal acid hydrolysis using 350 mM HNO3 at 121 °C for 60 min and enzymatic saccharification with a 1:1 mixture of Viscozyme L and Celluclast 1.5 L for 72 h. To enhance the galactose utilization rate, fermentation was performed with overexpression of GAL1 (galactokinase), GAL7 (galactose-1-phosphate uridyltransferase), GAL10 (UDP-glucose-4-epimerase), and PGM2 (phosphoglucomutase 2) in Saccharomyces cerevisiae CEN.PK2 using CCW12 as a strong promoter. Among the strains, the overexpression of PGM2 showed twofold high galactose utilization rate (URgal) and produced ethanol 1.4-fold more than that of the control. Transcriptional analysis revealed the increase of PGM2 transcription level leading to enhance glucose-6-phosphate and fructose-6-phosphate and plays a key role in ensuring a higher glycolytic flux in the PGM2 strain. This finding shows particular importance in biofuel production from seaweed because galactose is one of the major monosaccharides in seaweeds such as K. alvarezii.
Collapse
Affiliation(s)
- In Yung Sunwoo
- Division of Marine, Fisheries, and Life Science, Pukyong National University, Busan, 48513, South Korea
- Department of Chemistry, Umeå University, 90187, Umeå, Sweden
| | - Pailin Sukwong
- Division of Marine, Fisheries, and Life Science, Pukyong National University, Busan, 48513, South Korea
| | - Yu Rim Park
- Division of Marine, Fisheries, and Life Science, Pukyong National University, Busan, 48513, South Korea
| | - Deok Yeol Jeong
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, South Korea
| | - Soo Rin Kim
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, South Korea
| | - Gwi-Teak Jeong
- Division of Marine, Fisheries, and Life Science, Pukyong National University, Busan, 48513, South Korea
| | - Sung-Koo Kim
- Division of Marine, Fisheries, and Life Science, Pukyong National University, Busan, 48513, South Korea.
| |
Collapse
|
8
|
Wang F, Shi D, Han J, Zhang G, Jiang X, Yang M, Wu Z, Fu C, Li Z, Xian M, Zhang H. Comparative Study on Pretreatment Processes for Different Utilization Purposes of Switchgrass. ACS OMEGA 2020; 5:21999-22007. [PMID: 32923758 PMCID: PMC7482092 DOI: 10.1021/acsomega.0c01047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 08/11/2020] [Indexed: 05/19/2023]
Abstract
Switchgrass (Panicum virgatum, L., Poaceae) with the advantages of high cellulose yield, and high growth even under low input and poor soil quality, has been identified as a promising candidate for production of low-cost biofuels, papermaking, and nanocellulose. In this study, 12 chemical pretreatments on a laboratory scale were compared for different utilization purposes of switchgrass. It was found that the pretreated switchgrass with sodium hydroxide showed considerable potential for providing mixed sugars for fermentation with 11.10% of residual lignin, 53.85% of residual cellulose, and 22.06% of residual hemicellulose. The pretreatment with 2.00% (v/v) nitric acid was the best method to remove 78.37% of hemicellulose and 39.82% of lignin under a low temperature (125 °C, 30 min), which can be used in the production of nanocellulose. Besides, a completely randomized design analysis of switchgrass pretreatments provided the alternative ethanol organosolv delignification of switchgrass for the papermaking industry with a high residual cellulose of 58.56%. Finally, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FT-IR) were carried out to confirm the changes in functional groups, crystallinity, and thermal behavior of the three materials, respectively, from the optimal pretreatments.
Collapse
Affiliation(s)
- Fan Wang
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Sino-Danish
College, University of Chinese Academy of
Sciences, 19(A) Yuquan
Road, Beijing 100049, China
| | - Dongxiang Shi
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Lanzhou
University of Technology, 287 Langongping Road, Lanzhou, Gansu 730050, China
| | - Ju Han
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Sino-Danish
College, University of Chinese Academy of
Sciences, 19(A) Yuquan
Road, Beijing 100049, China
| | - Ge Zhang
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Sino-Danish
College, University of Chinese Academy of
Sciences, 19(A) Yuquan
Road, Beijing 100049, China
| | - Xinglin Jiang
- The
Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet Building 220, Kongens Lyngby 2800, Denmark
| | - Mingjun Yang
- Lanzhou
University of Technology, 287 Langongping Road, Lanzhou, Gansu 730050, China
| | - Zhenying Wu
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
| | - Chunxiang Fu
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
| | - Zhihao Li
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
| | - Mo Xian
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Sino-Danish
College, University of Chinese Academy of
Sciences, 19(A) Yuquan
Road, Beijing 100049, China
| | - Haibo Zhang
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of
Sciences, 189 Songling Road, Qingdao, Shandong 266101, China
- Sino-Danish
College, University of Chinese Academy of
Sciences, 19(A) Yuquan
Road, Beijing 100049, China
- . Phone: +86 139 6978 0438
| |
Collapse
|
9
|
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]
|
10
|
Fakhrian S, Baseri H. Production of a magnetic biosorbent for removing pharmaceutical impurities. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-020-0523-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Park Y, Sunwoo IY, Yang J, Jeong GT, Kim SK. Comparison of Ethanol Yield Coefficients Using Saccharomyces cerevisiae, Candida lusitaniae, and Kluyveromyces marxianus Adapted to High Concentrations of Galactose with Gracilaria verrucosa as Substrate. J Microbiol Biotechnol 2020; 30:930-936. [PMID: 32238769 PMCID: PMC9728270 DOI: 10.4014/jmb.2002.02014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/15/2020] [Indexed: 12/15/2022]
Abstract
The red seaweed Gracilaria verrucosa has been used for the production of bioethanol. Pretreatment for monosaccharide production was carried out with 12% (w/v) G. verrucosa slurry and 500 mM HNO3 at 121°C for 90 min. Enzymatic hydrolysis was performed with a mixture of commercial enzymes (Cellic C-Tec 2 and Celluclast 1.5 L; 16 U/ml) at 50°C and 150 rpm for 48 h. G. verrucosa was composed of 66.9% carbohydrates. In this study, 61.0 g/L monosaccharides were obtained from 120.0 g dw/l G. verrucosa. The fermentation inhibitors such as hydroxymethylfurfural (HMF), levulinic acid, and formic acid were produced during pretreatment. Activated carbon was used to remove HMF. Wildtype and adaptively evolved Saccharomyces cerevisiae, Candida lusitaniae, and Kluyveromyces marxianus were used for fermentation to evaluate ethanol production.
Collapse
Affiliation(s)
- Yurim Park
- Department of Biotechnology, Pukyong National University, Busan 48513, Republic of Korea
| | - In Yung Sunwoo
- Department of Biotechnology, Pukyong National University, Busan 48513, Republic of Korea
| | - Jiwon Yang
- Department of Biotechnology, Pukyong National University, Busan 48513, Republic of Korea
| | - Gwi-Teak Jeong
- Department of Biotechnology, Pukyong National University, Busan 48513, Republic of Korea
| | - Sung-Koo Kim
- Department of Biotechnology, Pukyong National University, Busan 48513, Republic of Korea,Corresponding author Phone: +82-51-629-5868 Fax: + 82-51-629-5863 E-mail:
| |
Collapse
|
12
|
Shah SSM, Luthfi AAI, Jahim JM, Harun S, Low KO. An improvement in fermentability of acid-hydrolysed hemicellulose from kenaf stem for xylitol production. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2020. [DOI: 10.1515/ijfe-2019-0230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn recent years, there has been a growing interest in the use of agricultural biomass for fermentation purposes; however, efficient strategies to counter lignocellulose inhibition are warranted to enhance xylitol production performance. Dilute-acid hydrolysis has been studied to selectively release a significant portion of xylose from hemicellulose, while leaving cellulose and lignin intact. The formation of inhibitory compounds, however, could jeopardise the overall performance during fermentation to produce xylitol. In this study, the fermentability of nitric acid-hydrolysed kenaf stem was substantially improved, through either adaptive evolution of the recombinant Escherichia coli BL21 (DE3) or removal of fermentation inhibitors by detoxification with activated carbon. Both methods were compared to evaluate the superiority in fermentative performance. In the fermentation with detoxified hemicellulosic hydrolysate, the non-adapted strain produced the highest xylitol concentration of up to 6.8 g/L, with 61.5% xylose consumption. The yields of xylitol production involving detoxification were successfully enhanced by 22.6% and by 35.7% compared to those involving adaptive evolution and raw hydrolysate, respectively. The results reported herein suggest that the utilization of detoxified kenaf stem hydrolysate could be advantageous.
Collapse
Affiliation(s)
- Siti Syazwani Mohd Shah
- Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan, Bangi, Malaysia
| | - Abdullah Amru Indera Luthfi
- Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan, Bangi, Malaysia
| | - Jamaliah Md Jahim
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan, Bangi, Malaysia
| | - Shuhaida Harun
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan, Bangi, Malaysia
| | - Kheng Oon Low
- Malaysia Genome Institute, National Insitutes of Biotechnology Malaysia, Jalan Bangi Lama, Kajang, Malaysia
| |
Collapse
|
13
|
Rahmati S, Doherty W, Dubal D, Atanda L, Moghaddam L, Sonar P, Hessel V, Ostrikov K(K. Pretreatment and fermentation of lignocellulosic biomass: reaction mechanisms and process engineering. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00241k] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
At a time of rapid depletion of oil resources, global food shortages and solid waste problems, it is imperative to encourage research into the use of appropriate pre-treatment techniques using regenerative raw materials such as lignocellulosic biomass.
Collapse
Affiliation(s)
- Shahrooz Rahmati
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
- Centre for Agriculture and the Bioeconomy
| | - William Doherty
- Centre for Agriculture and the Bioeconomy
- Institute for Future Environments
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
| | - Deepak Dubal
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
- Centre for Materials Science
| | - Luqman Atanda
- Centre for Agriculture and the Bioeconomy
- Institute for Future Environments
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
| | - Lalehvash Moghaddam
- Centre for Agriculture and the Bioeconomy
- Institute for Future Environments
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
| | - Prashant Sonar
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
- Centre for Agriculture and the Bioeconomy
| | - Volker Hessel
- School of Chemical Engineering and Advanced Materials
- The University of Adelaide
- Adelaide
- Australia
- School of Engineering
| | - Kostya (Ken) Ostrikov
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane 4000
- Australia
- Centre for Agriculture and the Bioeconomy
| |
Collapse
|
14
|
Sunwoo I, Kwon JE, Jeong GT, Kim SK. Optimization of hyper-thermal acid hydrolysis and enzymatic saccharification of Ascophyllum nodosum for ethanol production with mannitol-adapted yeasts. Bioprocess Biosyst Eng 2019; 42:1255-1262. [PMID: 30997613 DOI: 10.1007/s00449-019-02123-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 04/04/2019] [Indexed: 10/27/2022]
Abstract
In this study, Ascophyllum nodosum was studied as a biomass for ethanol production. A. nodosum was degraded to monosaccharide by hyper-thermal (HT) acid hydrolysis and enzymatic saccharification and analyzed using response surface methodology (RSM) and the Michaelis-Menten equation. Maximum monosaccharide concentrations of 20.3 g/L glucose and 7.0 g/L mannitol were obtained from HT acid hydrolysis and enzymatic saccharification from 8%(w/v) of A. nodosum. Fermentation was conducted using Pichia stipitis and P. angophorae adapted to high mannitol concentrations. Neither non-adapted P. stipitis and P. angophorae nor adapted P. stipitis could ferment all mannitol in the A. nodosum hydrolysate. Adapted P. angophorae produced the highest ethanol concentration among various yeasts, with ethanol production reaching 13.6 g/L with an ethanol yield (YEtOH) of 0.50. Optimization of HT acid hydrolysis and enzymatic saccharification, in combination with the use of adapted yeast, could enhance overall A. nodosum ethanol fermentation yields.
Collapse
Affiliation(s)
- InYung Sunwoo
- Department of Biotechnology, Pukyong National University, Busan, 608-737, Korea
| | - Jeong Eun Kwon
- Department of Biotechnology, Pukyong National University, Busan, 608-737, Korea
| | - Gwi-Tack Jeong
- Department of Biotechnology, Pukyong National University, Busan, 608-737, Korea
| | - Sung-Koo Kim
- Department of Biotechnology, Pukyong National University, Busan, 608-737, Korea.
| |
Collapse
|
15
|
Yoo HM, Park SW, Seo YC, Kim KH. Applicability assessment of empty fruit bunches from palm oil mills for use as bio-solid refuse fuels. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 234:1-7. [PMID: 30599325 DOI: 10.1016/j.jenvman.2018.11.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/22/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
Palm kernel shells (PKS), empty fruit bunches (EFB), and trunks are by-products of the palm oil industry and form approximately 50 wt % of fresh fruit bunch (FFB). In particular, EFB accounts for approximately 20 wt % of FFB. Although large amounts of EFB are generated from palm oil mills every year in Indonesia and Malaysia, EFB is treated as waste because commercial technologies for thermo-chemical conversion of EFB into renewable energy are still under development. A robust conversion method can transform EFB into an appealing renewable energy source. In order to secure this renewable energy source, Korea can import EFB as biomass. This paper investigates literature on the status of utilization of EFB, by-products from palm oil mills in order to identify the best available technological process to use EFB as bio-solid refuse fuels (SRF). Meanwhile, physico-chemical analyses (proximate, elemental, and calorific value analyses), biomass and heavy metal content were measured in order to assess whether EFB would be suitable for use as a bio-SRF, in accordance with the Korean quality standard for SRF. According to the analysis results, EFB showed applicability to use as bio-SRF; main analysis results - moisture (9.63 wt %), ash (5.94 wt %), biomass content (97.82 wt %) and calorific value (3668 kcal kg).
Collapse
Affiliation(s)
- Heung-Min Yoo
- Department of Environmental Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Se-Won Park
- Department of Environmental Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Yong-Chil Seo
- Department of Environmental Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Ki-Heon Kim
- National Institute of Environmental Research, Incheon, Republic of Korea.
| |
Collapse
|
16
|
Shah SSM, Luthfi AAI, Low KO, Harun S, Manaf SFA, Illias RM, Jahim JM. Preparation of kenaf stem hemicellulosic hydrolysate and its fermentability in microbial production of xylitol by Escherichia coli BL21. Sci Rep 2019; 9:4080. [PMID: 30858467 PMCID: PMC6411968 DOI: 10.1038/s41598-019-40807-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 02/19/2019] [Indexed: 12/20/2022] Open
Abstract
Kenaf (Hibiscus cannabinus L.), a potential fibre crop with a desirably high growth rate, could serve as a sustainable feedstock in the production of xylitol. In this work, the extraction of soluble products of kenaf through dilute nitric-acid hydrolysis was elucidated with respect to three parameters, namely temperature, residence time, and acid concentration. The study will assist in evaluating the performance in terms of xylose recovery. The result point out that the maximum xylose yield of 30.7 g per 100 g of dry kenaf was attained from 2% (v/v) HNO3 at 130 °C for 60 min. The detoxified hydrolysate was incorporated as the primary carbon source for subsequent fermentation by recombinant Escherichia coli and the performance of strain on five different semi-synthetic media on xylitol production were evaluated herein. Among these media, batch cultivation in a basal salt medium (BSM) afforded the highest xylitol yield of 0.35 g/g based on xylose consumption, which corresponded to 92.8% substrate utilization after 38 h. Subsequently, fermentation by E. coli in the xylose-based kenaf hydrolysate supplemented with BSM resulting in 6.8 g/L xylitol which corresponding to xylitol yield of 0.38 g/g. These findings suggested that the use of kenaf as the fermentation feedstock could be advantageous for the development of sustainable xylitol production.
Collapse
Affiliation(s)
- Siti Syazwani Mohd Shah
- Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia
| | - Abdullah Amru Indera Luthfi
- Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia
| | - Kheng Oon Low
- Malaysia Genome Institute (MGI), National Insitutes of Biotechnology Malaysia, Jalan Bangi Lama, Kajang, Malaysia
| | - Shuhaida Harun
- Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia.,Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia
| | - Shareena Fairuz Abdul Manaf
- Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia.,Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia.,Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450, Shah Alam, Selangor Darul Ehsan, Malaysia
| | - Rosli Md Illias
- Malaysia Genome Institute (MGI), National Insitutes of Biotechnology Malaysia, Jalan Bangi Lama, Kajang, Malaysia
| | - Jamaliah Md Jahim
- Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia. .,Research Centre of Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan, Malaysia.
| |
Collapse
|
17
|
Wu Z. Mixed fermentation of Aspergillus niger and Candida shehatae to produce bioethanol with ionic-liquid-pretreated bagasse. 3 Biotech 2019; 9:41. [PMID: 30675451 PMCID: PMC6328811 DOI: 10.1007/s13205-019-1570-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 01/03/2019] [Indexed: 10/27/2022] Open
Abstract
In this study, bagasse was pretreated with ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and 1% NaOH solution for initial activation of bagasse. A mixed fermentation of treated bagasse by Aspergillus niger and Candida shehatae showed the optimal conditions with the addition of C. shehatae 12 h later at a 1:1 proportion to A. niger. To further improve the ethanol production and obtain optimal fermentation conditions, a Plackett-Burman design was applied to screen the significant formulation and process variables. The optimal ethanol fermentation conditions with IL pretreated bagasse were determined using response surface methodology by Box-Behnken design. Three variables "initial pH, (NH4)2SO4, fermentation time" were regarded as significant factors in the optimization study. The resulting optimum fermentation conditions for bioethanol was identified as: initial pH of 5.89, (NH4)2SO4 concentration of 0.40 g/50 mL, and fermentation time of 3.60 days. The verification experimental ethanol concentration was 8.14 g/L, which agreed with the predicted value. An enhancement of approximately 153.58% compared with initial fermentation conditions in ethanol production was found using optimized conditions. It demonstrated that optimization methodology had a positive effect on the improvement of ethanol production. Under the optimal fermentation medium and conditions, the ethanol production with IL-pretreated bagasse and untreated bagasse was 8.14 g/L and 5.03 g/L, respectively, which exhibited 62% increase, compared to initial conditions with production of 3.21 g/L and 2.67 g/L, respectively, which displayed 20% increase. Both under optimal and original fermentation conditions, compared to the fermentation medium with untreated bagasse, all the results indicated that IL-pretreated bagasse resulted in higher ethanol production than untreated bagasse, demonstrating that IL-pretreated bagasse successfully increased the ethanol production in the mixed fermentation by A. niger and C. shehatae.
Collapse
Affiliation(s)
- Zaiqiang Wu
- Center for Molecular Metabolism, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094 China
| |
Collapse
|
18
|
Huang J, Xia T, Li G, Li X, Li Y, Wang Y, Wang Y, Chen Y, Xie G, Bai FW, Peng L, Wang L. Overproduction of native endo-β-1,4-glucanases leads to largely enhanced biomass saccharification and bioethanol production by specific modification of cellulose features in transgenic rice. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:11. [PMID: 30636971 PMCID: PMC6325865 DOI: 10.1186/s13068-018-1351-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 12/29/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND Genetic modification of plant cell walls has been implemented to reduce lignocellulosic recalcitrance for biofuel production. Plant glycoside hydrolase family 9 (GH9) comprises endo-β-1,4-glucanase in plants. Few studies have examined the roles of GH9 in cell wall modification. In this study, we independently overexpressed two genes from GH9B subclasses (OsGH9B1 and OsGH9B3) and examined cell wall features and biomass saccharification in transgenic rice plants. RESULTS Compared with the wild type (WT, Nipponbare), the OsGH9B1 and OsGH9B3 transgenic rice plants, respectively, contained much higher OsGH9B1 and OsGH9B3 protein levels and both proteins were observed in situ with nonspecific distribution in the plant cells. The transgenic lines exhibited significantly increased cellulase activity in vitro than the WT. The OsGH9B1 and OsGH9B3 transgenic plants showed a slight alteration in three wall polymer compositions (cellulose, hemicelluloses, and lignin), in their stem mechanical strength and biomass yield, but were significantly decreased in the cellulose degree of polymerization (DP) and lignocellulose crystalline index (CrI) by 21-22%. Notably, the crude cellulose substrates of the transgenic lines were more efficiently digested by cellobiohydrolase (CBHI) than those of the WT, indicating the significantly increased amounts of reducing ends of β-1,4-glucans in cellulose microfibrils. Finally, the engineered lines generated high sugar yields after mild alkali pretreatments and subsequent enzymatic hydrolysis, resulting in the high bioethanol yields obtained at 22.5% of dry matter. CONCLUSIONS Overproduction of OsGH9B1/B3 enzymes should have specific activity in the postmodification of cellulose microfibrils. The increased reducing ends of β-1,4-glucan chains for reduced cellulose DP and CrI positively affected biomass enzymatic saccharification. Our results demonstrate a potential strategy for genetic modification of cellulose microfibrils in bioenergy crops.
Collapse
Affiliation(s)
- Jiangfeng Huang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, 010070 China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, Guangxi University, Nanning, 530004 China
| | - Tao Xia
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Guanhua Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, 010070 China
| | - Xianliang Li
- College of Bioengineering, Jingchu University of Technology, Jingmen, 448000 China
| | - Ying Li
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Yanting Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Youmei Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Yuanyuan Chen
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Guosheng Xie
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Feng-Wu Bai
- State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Liangcai Peng
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
- State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Lingqiang Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| |
Collapse
|
19
|
Morone A, Chakrabarti T, Pandey RA. Effect of chemical input during wet air oxidation pretreatment of rice straw in reducing biomass recalcitrance and enhancing cellulose accessibility. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0129-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
20
|
Yao L, Yang H, Yoo CG, Pu Y, Meng X, Muchero W, Tuskan GA, Tschaplinski T, Ragauskas AJ. Understanding the influences of different pretreatments on recalcitrance of Populus natural variants. BIORESOURCE TECHNOLOGY 2018; 265:75-81. [PMID: 29883849 DOI: 10.1016/j.biortech.2018.05.057] [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: 03/21/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
Four different pretreatment technologies were applied to two Populus natural variants and the effects of each pretreatment on glucose release were compared. Physicochemical properties of pretreated biomass were analyzed by attenuated total reflection Fourier transform infrared spectroscopy, gel permeation chromatography, and cross polarization/magic angle spinning carbon-13 nuclear magnetic resonance techniques. The results revealed that hemicellulose and lignin were removed to different extents during various pretreatments. The degree of polymerization of cellulose was decreased in the order of alkali > hydrothermal > organosolv > dilute acid pretreatment. Cellulose crystallinity index was slightly increased after each pretreatment. The results also demonstrated that organosolv pretreatment resulted in the highest glucose yield. Among the tested properties of Populus, degree of polymerization of cellulose was negatively correlated with glucose release, whereas hemicellulose and lignin removal, and cellulose accessibility were positively associated with glucose release from the two Populus natural variants.
Collapse
Affiliation(s)
- Lan Yao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China; Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA
| | - Haitao Yang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China; Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA
| | - Chang Geun Yoo
- The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Yunqiao Pu
- The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Xianzhi Meng
- Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA
| | - Wellington Muchero
- The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Gerald A Tuskan
- The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Timothy Tschaplinski
- The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Arthur J Ragauskas
- Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA; Department of Forestry, Wildlife and Fisheries, Center for Renewable Carbon, The University of Tennessee Knoxville, Institute of Agriculture, Knoxville, TN 37996, USA; The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| |
Collapse
|
21
|
Nitric Acid Pretreatment of Jerusalem Artichoke Stalks for Enzymatic Saccharification and Bioethanol Production. ENERGIES 2018. [DOI: 10.3390/en11082153] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This paper evaluated the effectiveness of nitric acid pretreatment on the hydrolysis and subsequent fermentation of Jerusalem artichoke stalks (JAS). Jerusalem artichoke is considered a potential candidate for producing bioethanol due to its low soil and climate requirements, and high biomass yield. However, its stalks have a complexed lignocellulosic structure, so appropriate pretreatment is necessary prior to enzymatic hydrolysis, to enhance the amount of sugar that can be obtained. Nitric acid is a promising catalyst for the pretreatment of lignocellulosic biomass due to the high efficiency with which it removes hemicelluloses. Nitric acid was found to be the most effective catalyst of JAS biomass. A higher concentration of glucose and ethanol was achieved after hydrolysis and fermentation of 5% (w/v) HNO3-pretreated JAS, leading to 38.5 g/L of glucose after saccharification, which corresponds to 89% of theoretical enzymatic hydrolysis yield, and 9.5 g/L of ethanol. However, after fermentation there was still a significant amount of glucose in the medium. In comparison to more commonly used acids (H2SO4 and HCl) and alkalis (NaOH and KOH), glucose yield (% of theoretical yield) was approximately 47–74% higher with HNO3. The fermentation of 5% nitric-acid pretreated hydrolysates with the absence of solid residues, led to an increase in ethanol yield by almost 30%, reaching 77–82% of theoretical yield.
Collapse
|
22
|
Kim YS, Jang JY, Park SJ, Um BH. Dilute sulfuric acid fractionation of Korean food waste for ethanol and lactic acid production by yeast. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 74:231-240. [PMID: 29398269 DOI: 10.1016/j.wasman.2018.01.012] [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: 07/11/2017] [Revised: 12/01/2017] [Accepted: 01/09/2018] [Indexed: 06/07/2023]
Abstract
Fermentation of food waste biomass can be used to produce biochemicals such as lactic acid and ethanol in a cost-effective manner. Korean food waste (KFW) dewatered by a screw press contains 23.1% glucan on a dry basis and is a potential raw material for the production of ethanol and lactic acid through fermentation. This study was conducted to optimize the dilute acid fractionation conditions for KFW fermentation with respect to the H2SO4 concentration (0-0.8% w/v), temperature (130-190 °C), and residence time (1-128 min) using response surface methodology. Dilute sulfuric acid fractionation was carried out using a 30-mL stainless steel reactor under conditions, and then the dilute acid fractionation was scaled-up in 1-L and 7-L stainless steel reactors under the optimal conditions. The hydrolysate was concentrated, liquid-liquid extracted and neutralized for lactic acid and ethanol production. The highest concentration of glucose obtained from the KFW was 26.4 g/L using fractionation with 0.37% w/v H2SO4 at 156 °C for 123.6 min. Using recombinant Saccharomyces cerevisiae containing a codon-optimized lactate dehydrogenase, the yield of lactic acid and ethanol was 77% of the theoretical yield for 17.4 g/L of fermentable sugar at pH 5.5. Additionally, the yield of ethanol produced by Issatchenkia orientalis was 89% of the theoretical yield for 25 g/L of fermentable sugar at pH 3.
Collapse
Affiliation(s)
- Yong Seon Kim
- Department of Chemical Engineering and Research Center of Chemical Technology Hankyong National University, Anseong, Gyonggi-do 17579, Republic of Korea
| | - Ji Yeon Jang
- Intelligent Sustainable Materials R&D Group, Research Institute of Sustainable Manufacturing System, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Republic of Korea
| | - Seong Jik Park
- Department of Bioresources and Rural Systems Engineering Hankyong National University, Anseong, Gyonggi-do 17579, Republic of Korea
| | - Byung Hwan Um
- Department of Chemical Engineering and Research Center of Chemical Technology Hankyong National University, Anseong, Gyonggi-do 17579, Republic of Korea.
| |
Collapse
|
23
|
Krishania M, Kumar V, Sangwan RS. Integrated approach for extraction of xylose, cellulose, lignin and silica from rice straw. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biteb.2018.01.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
24
|
Kapoor M, Soam S, Agrawal R, Gupta RP, Tuli DK, Kumar R. Pilot scale dilute acid pretreatment of rice straw and fermentable sugar recovery at high solid loadings. BIORESOURCE TECHNOLOGY 2017; 224:688-693. [PMID: 27864133 DOI: 10.1016/j.biortech.2016.11.032] [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: 10/06/2016] [Revised: 11/04/2016] [Accepted: 11/05/2016] [Indexed: 05/05/2023]
Abstract
The aim of this work was to study the dilute acid pretreatment of rice straw (RS) and fermentable sugar recovery at high solid loadings at pilot scale. A series of pretreatment experiments were performed on RS resulting in >25wt% solids followed by enzymatic hydrolysis without solid-liquid separation at 20 and 25wt% using 10FPU/g of the pretreated residue. The overall sugar recovery including the sugars released in pretreatment and enzymatic hydrolysis was calculated along with a mass balance. Accordingly, the optimized conditions, i.e. 0.35wt% acid, 162°C and 10min were identified. The final glucose and xylose concentrations obtained were 83.3 and 31.9g/L respectively resulting in total concentration of 115.2g/L, with a potential to produce >50g/L of ethanol. This is the first report on pilot scale study on acid pretreatment of RS in a screw feeder horizontal reactor followed by enzymatic hydrolysis at high solid loadings.
Collapse
Affiliation(s)
- Manali Kapoor
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Shveta Soam
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Ruchi Agrawal
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Ravi P Gupta
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Deepak K Tuli
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Ravindra Kumar
- DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
| |
Collapse
|
25
|
Victor A, Pulidindi IN, Kim TH, Gedanken A. Design of a selective solid acid catalyst for the optimization of glucose production from Oryza sativa straw. RSC Adv 2016. [DOI: 10.1039/c5ra20121g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A selective, green and fast method for the production of glucose from rice (Oryza sativa) straw is demonstrated.
Collapse
Affiliation(s)
| | | | - Tae Hyun Kim
- Department of Environmental Engineering
- Kongju National University
- Cheonan
- Korea
| | - Aharon Gedanken
- Department of Chemistry
- Bar-Ilan University
- Ramat-Gan 52900
- Israel
- National Cheng Kung University
| |
Collapse
|
26
|
Lee I, Han JI. Hydrothermal-acid treatment for effectual extraction of eicosapentaenoic acid (EPA)-abundant lipids from Nannochloropsis salina. BIORESOURCE TECHNOLOGY 2015; 191:1-6. [PMID: 25966023 DOI: 10.1016/j.biortech.2015.04.124] [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: 03/10/2015] [Revised: 04/28/2015] [Accepted: 04/30/2015] [Indexed: 05/13/2023]
Abstract
Hydrothermal acid treatment, was adopted to extract eicosapentaenoic acid (EPA) from wet biomass of Nannochloropsis salina. It was found that sulfuric acid-based treatment increased EPA yield from 11.8 to 58.1 mg/g cell in a way that was nearly proportional to its concentration. Nitric acid exhibited the same pattern at low concentrations, but unlike sulfuric acid its effectiveness unexpectedly dropped from 0.5% to 2.0%. The optimal and minimal conditions for hydrothermal acid pretreatment were determined using a statistical approach; its maximum EPA yield (predicted: 43.69 mg/g cell; experimental: 43.93 mg/g cell) was established at a condition of 1.27% of sulfuric acid, 113.34 °C of temperature, and 36.71 min of reaction time. Our work demonstrated that the acid-catalyzed cell disruption, accompanied by heat, can be one potentially promising option for ω-3 fatty acids extraction.
Collapse
Affiliation(s)
- Ilgyu Lee
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-338, Republic of Korea
| | - Jong-In Han
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-338, Republic of Korea.
| |
Collapse
|
27
|
Choi SA, Choi WI, Lee JS, Kim SW, Lee GA, Yun J, Park JY. Hydrothermal acid treatment for sugar extraction from Golenkinia sp. BIORESOURCE TECHNOLOGY 2015; 190:408-411. [PMID: 25976916 DOI: 10.1016/j.biortech.2015.04.121] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 04/06/2015] [Accepted: 04/11/2015] [Indexed: 06/04/2023]
Abstract
In this study, hydrothermal acid treatment for efficient recovery of sugar from Golenkinia sp. was investigated. The initial glucose and XMG (xylose, mannose, and galactose) contents of a prepared Golenkinia sp. solution (40g/L) were 15.05 and 5.24g/L, respectively. The microalgal cell walls were hydrolyzed, for sugar recovery, by enzymatic saccharification and/or hydrothermal acid treatment. Among the various hydrothermal acid treatment conditions, the most optimal were the 2.0% H2SO4 concentration at 150°C for 15min, under which the glucose- and XMG-extraction yields were 71.7% and 64.9%, respectively. By pH 4.8, 50°C enzymatic hydrolysis after optimal hydrothermal acid treatment, the glucose- and XMG-extraction yields were additionally increased by 8.3% and 0.8%, respectively. After hydrothermal acid treatment, the combination with the enzymatic hydrolysis process improved the total sugar yield of Golenkinia sp. to 75.4%.
Collapse
Affiliation(s)
- Sun-A Choi
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea; Department of Chemical & Biological Engineering, Korea Univ., Anam-dong 5-ga, Seongbuk-gu, Seoul 136-713, Republic of Korea
| | - Won-Il Choi
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Jin-Suk Lee
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Seung Wook Kim
- Department of Chemical & Biological Engineering, Korea Univ., Anam-dong 5-ga, Seongbuk-gu, Seoul 136-713, Republic of Korea
| | - Gye-An Lee
- NLP Corporation, 86-103 Hwajeon 2-gil, Ilgwang-myeon, Gijang-gun, Busan 619-912, Republic of Korea
| | - Jihyun Yun
- NLP Corporation, 86-103 Hwajeon 2-gil, Ilgwang-myeon, Gijang-gun, Busan 619-912, Republic of Korea
| | - Ji-Yeon Park
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
| |
Collapse
|
28
|
Sánchez S, Cuevas M, Saleh M, García-Martín JF. Influence of solid loading on D-xylose production through dilute sulphuric acid hydrolysis of olive stones. GRASAS Y ACEITES 2015. [DOI: 10.3989/gya.0838142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
29
|
Park GW, Kim I, Jung K, Seo C, Han JI, Chang HN, Kim YC. Enhancement of volatile fatty acids production from rice straw via anaerobic digestion with chemical pretreatment. Bioprocess Biosyst Eng 2015; 38:1623-7. [DOI: 10.1007/s00449-015-1387-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 03/05/2015] [Indexed: 11/29/2022]
|
30
|
Kapoor M, Raj T, Vijayaraj M, Chopra A, Gupta RP, Tuli DK, Kumar R. Structural features of dilute acid, steam exploded, and alkali pretreated mustard stalk and their impact on enzymatic hydrolysis. Carbohydr Polym 2015; 124:265-73. [PMID: 25839820 DOI: 10.1016/j.carbpol.2015.02.044] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 02/12/2015] [Accepted: 02/22/2015] [Indexed: 11/26/2022]
Abstract
To overcome the recalcitrant nature of biomass several pretreatment methodologies have been explored to make it amenable to enzymatic hydrolysis. These methodologies alter cell wall structure primarily by removing/altering hemicelluloses and lignin. In this work, alkali, dilute acid, steam explosion pretreatment are systematically studied for mustard stalk. To assess the structural variability after pretreatment, chemical analysis, surface area, crystallinity index, accessibility of cellulose, FT-IR and thermal analysis are conducted. Although the extent of enzymatic hydrolysis varies upon the methodologies used, nevertheless, cellulose conversion increases from <10% to 81% after pretreatment. Glucose yield at 2 and 72h are well correlated with surface area and maximum adsorption capacity. However, no such relationship is observed for xylose yield. Mass balance of the process is also studied. Dilute acid pretreatment is the best methodology in terms of maximum sugar yield at lower enzyme loading.
Collapse
Affiliation(s)
- Manali Kapoor
- DBT-IOC Centre for Advanced Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Tirath Raj
- DBT-IOC Centre for Advanced Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - M Vijayaraj
- Nanotechnology Division, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Anju Chopra
- Analytical Division, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Ravi P Gupta
- DBT-IOC Centre for Advanced Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Deepak K Tuli
- DBT-IOC Centre for Advanced Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India
| | - Ravindra Kumar
- DBT-IOC Centre for Advanced Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
| |
Collapse
|
31
|
Lee I, Park JY, Choi SA, Oh YK, Han JI. Hydrothermal nitric acid treatment for effectual lipid extraction from wet microalgae biomass. BIORESOURCE TECHNOLOGY 2014; 172:138-142. [PMID: 25255190 DOI: 10.1016/j.biortech.2014.08.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/21/2014] [Accepted: 08/23/2014] [Indexed: 05/26/2023]
Abstract
Hydrothermal acid (combined with autoclaving and nitric acid) pretreatment was applied to Nannochloropsis salina as a cost-effective yet efficient way of lipid extraction from wet biomass. The optimal conditions for this pretreatment were determined using a statistical approach, and the roles of nitric acid were also determined. The maximum lipid yield (predicted: 24.6%; experimental: 24.4%) was obtained using 0.57% nitric acid at 120°C for 30min through response surface methodology. A relatively lower lipid yield (18.4%) was obtained using 2% nitric acid; however, chlorophyll and unsaturated fatty acids, both of which adversely affect the refinery and oxidative stability of biodiesel, were found to be not co-extracted. Considering its comparable extractability even from wet biomass and ability to reduce chlorophyll and unsaturated fatty acids, the hydrothermal nitric acid pretreatment can serve as one direct and promising route of extracting microalgae oil.
Collapse
Affiliation(s)
- Ilgyu Lee
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Ji-Yeon Park
- Clean Fuel Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Sun-A Choi
- Clean Fuel Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - You-Kwan Oh
- Clean Fuel Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Jong-In Han
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
| |
Collapse
|
32
|
Enhanced enzymatic hydrolysis of waste paper for ethanol production using separate saccharification and fermentation. Appl Biochem Biotechnol 2014; 175:25-42. [PMID: 25234398 DOI: 10.1007/s12010-014-1243-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 09/10/2014] [Indexed: 10/24/2022]
Abstract
Ethanol produced from lignocellulosic biomass is a renewable alternative to diminishing petroleum-based liquid fuels. In this study, the feasibility of ethanol production from waste paper using the separate hydrolysis and fermentation (SHF) was investigated. Two types of waste paper materials, newspaper and office paper, were evaluated for their potential to be used as a renewable feedstock for the production of fermentable sugars via enzymatic hydrolysis of their cellulose fractions. Hydrolysis step was conducted with a mixture of cellulolytic enzymes produced locally by Trichoderma reesei Rut-C30 (cellulase-overproducing mutant) and Aspergillus niger F38 cultures. Surfactant pretreatment effect on waste paper enzymatic digestibility was studied and Triton X-100 at 0.5 % (w w(-1)) has improved the digestibility of newspaper about 45 %. The effects of three factors (dry matter quantity, phosphoric acid pretreatment and hydrolysis time) on the extent of saccharification were also assessed and quantified by using a methodical approach based on response surface methodology. Under optimal hydrolysis conditions, maximum degrees of saccharification of newspaper and office paper were 67 and 92 %, respectively. Sugars released from waste paper were subsequently converted into ethanol (0.38 g ethanol g(-1) sugar) with Saccharomyces cerevisiae CTM-30101.
Collapse
|