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Jo S, Bae J, Kadam R, Lee J, Park J, Jun H. Enhanced anaerobic co-digestion of cattle manure with food waste and pig manure: Statistical optimization of pretreatment condition and substrate mixture ratio. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 183:32-41. [PMID: 38714120 DOI: 10.1016/j.wasman.2024.04.043] [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: 01/16/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/09/2024]
Abstract
This study investigated the optimal pretreatment condition and mixture ratio of cattle manure (CM) for its efficient anaerobic co-digestion (AcoD) with food waste (FW) and pig manure (PM). The pretreatment performances of thermal (TM), microwave (MW), and ultrasound (US) technologies and the AcoD performance were statistically and experimentally evaluated at various mixture ratios of CM, FW, and PM. The results revealed that the most effective pretreatment condition with the TM, MW, and US pretreatments was 129.3 °C for 49.6 min, 824.2 W for 7.3 min, and 418.0 W for 36.3 min, respectively. The best AcoD performance of optimally pretreated CM (PCM) was achieved when 30.5 % PCM was mixed with 42.5 % FW and 27.0 % PM. A long-term evaluation showed that the start-up rate for the anaerobic mono-digestion of PCM was 2.3 times faster than that of CM and the amount of methane produced was 4.7 times higher; process stability was thus preferentially maintained under a higher organic loading rate (OLR) (2.0 kg-VS/m3∙d). The start-up rate for the AcoD of PCM with FW and PM was 1.2 times higher than that of the AcoD of CM with FW and PM. Although the performance gap between the AcoD reactors after steady state was not significantly different, the PCM AcoD reactor provided a more stable operation under a higher OLR (5.0 kg-VS/m3∙d). This study demonstrates that the pretreatment and co-digestion of CM could significantly enhance the production of biogas and improve process stability.
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Affiliation(s)
- Sangyeol Jo
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea.
| | - Jonghun Bae
- Department of Management Strategy, Livestock Environmental Management Institute, Sejong 30127, Republic of Korea
| | - Rahul Kadam
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Jonghwa Lee
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Jungyu Park
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Hangbae Jun
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea.
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2
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Mohammadi S, Tarrahimofrad H, Arjmand S, Zamani J, Haghbeen K, Aminzadeh S. Expression, characterization, and activity optimization of a novel cellulase from the thermophilic bacteria Cohnella sp. A01. Sci Rep 2022; 12:10301. [PMID: 35717508 PMCID: PMC9206686 DOI: 10.1038/s41598-022-14651-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 06/09/2022] [Indexed: 11/09/2022] Open
Abstract
Cellulases are hydrolytic enzymes with wide scientific and industrial applications. We described a novel cellulase, CelC307, from the thermophilic indigenous Cohnella sp. A01. The 3-D structure of the CelC307 was predicted by comparative modeling. Docking of CelC307 with specific inhibitors and molecular dynamic (MD) simulation revealed that these ligands bound in a non-competitive manner. The CelC307 protein was purified and characterized after recombinant expression in Escherichia coli (E. coli) BL21. Using CMC 1% as the substrate, the thermodynamic values were determined as Km 0.46 mM, kcat 104.30 × 10-3 (S-1), and kcat/Km 226.73 (M-1 S-1). The CelC307 was optimally active at 40 °C and pH 7.0. The culture condition was optimized for improved CelC307 expression using Plackett-Burman and Box-Behnken design as follows: temperature 20 °C, pH 7.5, and inoculation concentration with an OD600 = 1. The endoglucanase activity was positively modulated in the presence of Na+, Li+, Ca2+, 2-mercaptoethanol (2-ME), and glycerol. The thermodynamic parameters calculated for CelC307 confirmed its inherent thermostability. The characterized CelC307 may be a suitable candidate for various biotechnological applications.
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Affiliation(s)
- Shima Mohammadi
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Hossein Tarrahimofrad
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Sareh Arjmand
- Protein Research Center, Shahid Beheshti University, Tehran, Iran
| | - Javad Zamani
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Kamahldin Haghbeen
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Saeed Aminzadeh
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
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3
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Enhanced Optimization of Bioethanol Production from Palm Waste Using the Taguchi Method. SUSTAINABILITY 2021. [DOI: 10.3390/su132413660] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the present study, palm fiber (PF) and palm fronds (PFN) were selected as local agricultural wastes for the extraction of different biopolymers (cellulose, hemicelluloses, and lignin) by alkaline sodium hydroxide (PF, 2.37% NaOH at 86.5 °C for 1.6 h; PFN, 6% NaOH at 90 °C for 1 h) and bioethanol production. The processes of extraction were optimized by the experimental design method of Taguchi. The total carbohydrates of PF and PFN obtained were 24.4% and 31.0%, respectively. In addition, the untreated palm fiber (UPF), untreated palm frond (UPFN), cellulose palm fibers (CPF), and cellulose palm fronds (CPFN) were subjected to enzymatic hydrolysis processes using crude enzymes and commercial enzymes at 48 °C and pH 5.5. The results indicate that the maximum reducing sugars used were CPF 229.90, CPFN 243.69, UPF 120.19, and UPFN 100.00 (mg/g), which were obtained at a crude enzyme loading. CPF and CPFN hydrolysates were then successfully converted into bioethanol by a separate enzymatic hydrolysis and fermentation by Saccharomyces cerevisiae. Anaerobic cultivation of the hydrolysates with S.cerevisiae resulted in 0.222 g/g and 0.213 g/g bioethanol in the case of CPF and CPFN, respectively. Optimization processes could be an innovative approach to the sustainable development of bioethanol production.
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Rha CS, Park CS, Kim DO. Optimized enzymatic synthesis of digestive resistant anomalous isoquercitrin glucosides using amylosucrase and response surface methodology. Appl Microbiol Biotechnol 2021; 105:6931-6941. [PMID: 34477942 DOI: 10.1007/s00253-021-11532-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/24/2021] [Accepted: 08/19/2021] [Indexed: 02/03/2023]
Abstract
Diverse flavonoid glycosides are present in the plant kingdom. Advanced technologies have been utilized to synthesize glycosyl flavonoids which exhibit good physicochemical characteristics. Previously, novel isoquercitrin (IQ) mono-, di-, and tri-glucosides (IQ-G1', IQ-G2', and IQ-G3'; atypical IQ-Gs (IQ-Gap)) were synthesized through the reaction of amylosucrase. Here, the regio-selective transglycosylation yields were predicted using response surface methodology for three variables (glucose donor (sucrose; 100-1500 mM), glucose acceptor (IQ; 100-400 µM), and pH (5.0-8.8)) using 1 unit/mL of enzyme at 45 °C; then, the optima were verified according to the experimental responses. Acidity (pH 5.0) was a major contributor for IQ-G1' production (> 50%), and high sucrose concentration (1500 mM) limited IQ-G3' production (< 15%). Low sucrose concentration (100 mM) at pH 7.0 promoted higher glycosyl IQ production (> 30%). Time-course production of IQ-Gap showed an exponential growth with different rates. IQ-Gap was stable under the simulated intestinal conditions compared with typical IQ-Gs. Digestive stable IQ-Gap can be effectively synthesized by modulating reaction conditions; thereby, atypical glycosyl products may contribute to the elucidation of nutraceutical potential of flavonoid glycosides. KEY POINTS: •Predictions of RSM were validated for the regio-selective IQ-Gap production. • Time course changes of IQ-Gap indicate non-processive glycosylation of DGAS. • IQ-Gap exceed typical IQ-G in digestive stability at simulated intestinal condition.
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Affiliation(s)
- Chan-Su Rha
- AMOREPACIFIC R&D Center, Yongin, 17074, Republic of Korea.
| | - Cheon-Seok Park
- Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, Republic of Korea.,Department of Food Science and Biotechnology, and Institute of Life Science and Resources, Kyung Hee University, 17104, Yongin, Republic of Korea
| | - Dae-Ok Kim
- Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, Republic of Korea
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Awoyale AA, Lokhat D. Hybridization of Selected Nigerian Lignocellulosic Biomass Feedstocks for Bioethanol Production: Modeling and Optimization of Pretreatment and Fermentation Process Parameters Using Response Surface Methodology. J Oleo Sci 2021; 70:1013-1026. [PMID: 34121032 DOI: 10.5650/jos.ess21038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, hybridized feedstocks (mixtures of biomass) of cassava peels plus yam peels, as well as corn cobs plus rice husks biomass, were optimized using the response surface methodology centered on the statistical design of experiments (DOE) of the Box-Behnken design (BBD), to produce bioethanol. The feedstocks were locally sourced, hybridized (mixed), pretreated, and fermented before being distilled in a UOP3CC continuous distillation column. The BBD was applied using a 3-level, 3-factor process variables using pH, time, and particle size, and indicated as X1, X2, and X3, respectively. The bioethanol yield from the two hybridized biomass feedstocks was predicted by the developed quadratic polynomial models from BBD. For the hybridized biomass mixture of cassava peels plus yam peels, the optimal condition was statistically predicted as pH 5.00, fermentation time of 120.00 hours, and particle size of 362.5 microns, the predicted bioethanol yield under the optimal condition was 115.75 mL per 1500 g of hybridized biomass and the average volume of bioethanol obtained was 125.00 mL per 1500 g of biomass, which is within the projected range of the model equation, same applies to rice husks plus corn cobs hybridized biomass, but with a better prospect for bioethanol production.
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Affiliation(s)
- Adeolu A Awoyale
- Reactor Technology Research Group, School of Engineering, University of KwaZulu-Natal.,Petroleum and Natural Gas Processing Department, Petroleum Training Institute
| | - David Lokhat
- Reactor Technology Research Group, School of Engineering, University of KwaZulu-Natal
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Dawid M, Grzegorz K. Microwave-assisted hydrotropic pretreatment as a new and highly efficient way to cellulosic ethanol production from maize distillery stillage. Appl Microbiol Biotechnol 2021; 105:3381-3392. [PMID: 33835200 PMCID: PMC8053166 DOI: 10.1007/s00253-021-11258-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 01/13/2021] [Accepted: 03/24/2021] [Indexed: 01/24/2023]
Abstract
Abstract Aim of the study was to assess the suitability of the combined use of microwave radiation and sodium cumene sulfonate under optimized process conditions for the preparation of maize stillage biomass as a raw material for the production of cellulosic ethanol. The key parameter guaranteeing a high level of lignin removal from biomass (ca. 44%) was concentration of hydrotrope. Even at high biomass concentration (16% w/v) and a cellulase enzyme dose of about 4 filter-paper units/g, maize stillage biomass subjected to microwave-assisted hydrotropic pretreatment was highly susceptible to enzymatic degradation, which resulted in 80% hydrolysis yield. It is possible to obtain a fermentation medium with a very high glucose concentration (up to 80 g/L), without fermentation inhibitors and, as a consequence, to reach a very high level of sugar conversion to ethanol (concentration above 40 g/L), even as much as 95% of theoretical yield. Microwave hydrotropic treatment with sodium cumene sulfonate is a very effective way to prepare waste maize stillage biomass for the production of cellulosic ethanol. The degradation of the lignocellulose structure by the simultaneous use of microwaves and hydrotropes ensured a high degree of conversion of structural polysaccharides to bioethanol. The method provides a high level of enzymatic degradation of cellulose, leading to a medium with high content of released sugars suitable for bioconversion, which is in line with assumptions of the second-generation ethanol production technology. Key points • Microwave-assisted hydrotropic pretreatment is a new way to cellulosic ethanol production. • Microwave-assisted hydrotropic delignification removes 44% of lignin from biomass. • No fermentation inhibitors are obtained after microwave-assisted hydrotropic pretreatment. • High ethanol concentration (above 40 g/L) and fermentation yield (95% of theoretical yield) from biomass after microwave-assisted hydrotropic pretreatment.
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Affiliation(s)
- Mikulski Dawid
- Department of Biotechnology, Kazimierz Wielki University, ul. K. J. Poniatowskiego 12, 85-671, Bydgoszcz, Poland
| | - Kłosowski Grzegorz
- Department of Biotechnology, Kazimierz Wielki University, ul. K. J. Poniatowskiego 12, 85-671, Bydgoszcz, Poland.
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Improved Sugar Recovery from Orange Peel by Statistical Optimization of Thermo-Alkaline Pretreatment. Processes (Basel) 2021. [DOI: 10.3390/pr9030409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Orange peel, which is a by-product of oranges, contains carbohydrates that can be converted into sugars and used in the fermentation process. In this study, the thermal alkaline pretreatment process was chosen because of its simplicity and lesser reaction time. In addition, the reaction factors were optimized using response surface methodology. The determined optimal conditions were as follows: 60.1 g/L orange peels loading, 3% KOH and 30 min. Under the optimal conditions, glucan content (GC) and enzymatic digestibility (ED) were found to be 32.8% and 87.8%, respectively. Enzymatic hydrolysis was performed with pretreated and non-pretreated orange peels using three types of enzyme complex (cellulase, cellobiase and xylanase). The minimum concentrations of enzyme complex required to obtain maximum ED were 30 FPU (filter paper unit), 15 CBU (cellobiase unit), and 30 XNU (xylanase unit) based on 1 g-biomass. Additionally, ED of the treated group was approximately 3.7-fold higher than that of the control group. In conclusion, the use of orange peel as a feedstock for biorefinery can be a strategic solution to reduce wastage of resources and produce sustainable bioproducts.
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Bioethanol production from cereal crops and lignocelluloses rich agro-residues: prospects and challenges. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03471-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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9
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Suhag M, Kumar A, Singh J. Saccharification and fermentation of pretreated banana leaf waste for ethanol production. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03215-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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10
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Kondaveeti S, Patel SKS, Woo J, Wee JH, Kim SY, Al-Raoush RI, Kim IW, Kalia VC, Lee JK. Characterization of Cellobiohydrolases from Schizophyllum commune KMJ820. Indian J Microbiol 2020; 60:160-166. [PMID: 32255848 PMCID: PMC7105533 DOI: 10.1007/s12088-019-00843-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 11/20/2019] [Indexed: 12/18/2022] Open
Abstract
A novel cellobiohydrolase (CBH)-generating fungi have been isolated and categorized as Schizophyllum commune KMJ820 based on morphology and rDNA gene sequence. Cellulose powder was used as carbon source, the total enzyme activity was 11.51 U/ml is noted; which is among the highest amounts of CBH-generating microbes studied. CBH have been purified to homogenize, with pursual of serial chromatography using S. commune supernatants and two different CBHs were found; CBH 1 and 2. The filtered CBHs showed greater activity (V max = 51.4 and 20.8 U/mg) in contrast to CBHs from earlier studies. The MW (molecular weights) of S. commune CBH 1 and 2 were verified to be approximately 50 kDa and 150 kDa, respectively, by size exclusion chromatography. Even though CBHs have been evaluated from other sources, but S. commune CBH is prominent in comparison to other CBHs by its high enzyme activity.
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Affiliation(s)
- Sanath Kondaveeti
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Sanjay K. S. Patel
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Janghun Woo
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Ji Hyang Wee
- Department of Food Science and Biotechnology, Shin-Ansan University, Ansan, 15435 Republic of Korea
| | - Sang-Yong Kim
- Department of Food Science and Biotechnology, Shin-Ansan University, Ansan, 15435 Republic of Korea
| | - Riyadh I. Al-Raoush
- Department of Civil and Architectural Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - In-Won Kim
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Vipin Chandra Kalia
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Jung-Kul Lee
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, 05029 Republic of Korea
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Composition of Synthesized Cellulolytic Enzymes Varied with the Usage of Agricultural Substrates and Microorganisms. Appl Biochem Biotechnol 2020; 191:1695-1710. [PMID: 32206967 DOI: 10.1007/s12010-020-03297-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/12/2020] [Indexed: 10/25/2022]
Abstract
We evaluated various agricultural lignocellulosic biomass and variety of fungi to produce cellulolytic enzymes cocktail to yield high amount of reducing sugars. Solid-state fermentation was performed using water hyacinth, paddy straw, corn straw, soybean husk/tops, wheat straw, and sugarcane bagasse using fungi like Nocardiopsis sp. KNU, Trichoderma reesei, Trichoderma viride, Aspergillus flavus, and Phanerochaete chrysosporium alone and in combination to produce cellulolytic enzymes. Water hyacinth produced (U ml-1) endoglucanase (51.13) and filter paperase (0.55), and corn straw produced (U ml-1) β-glucosidase (4.65), xylanase (113.32), and glucoamylase (41.27) after 7-day incubation using Nocardiopsis sp. KNU. Production of cellulolytic enzymes was altered due to addition of various nitrogen sources, metal ions, vitamins, and amino acids. The maximum cellulolytic enzymes were produced by P. chrysosporium (endoglucanase; 166.32 U ml-1 and exoglucanase; 12.20 U ml-1), and by T. viride (filter paperase; 1.57 U ml-1). Among all, co-culture of T. reesei, T. viride, A. flavus, and P. chrysosporium showed highest β-glucosidase (17.05 U ml-1). The highest xylanase (1129 U ml-1) was observed in T. viride + P. chrysosporium co-culture. This study revealed the dependency on substrate and microorganism to produce good quality enzyme cocktail to obtain maximum reducing sugars.
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12
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Ashoor S, Sukumaran RK. Mild alkaline pretreatment can achieve high hydrolytic and fermentation efficiencies for rice straw conversion to bioethanol. Prep Biochem Biotechnol 2020; 50:814-819. [PMID: 32204649 DOI: 10.1080/10826068.2020.1744007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Mild alkaline pretreatment was evaluated as a strategy for effective lignin removal and hydrolysis of rice straw. The pretreatment efficiency of different NaOH concentrations (0.5, 1.0, 1.5 or 2.0% w/w) was assessed. Rice straw (RS) pretreated with 1.5% NaOH achieved better sugar yield compared to other concentrations used. A cellulose conversion efficiency of 91% (45.84 mg/ml glucose release) was attained from 1.5% NaOH pretreated rice straw (PRS), whereas 1% NaOH pretreated rice straw yielded 35.10 mg/ml of glucose corresponding to a cellulose conversion efficiency of 73.81%. The ethanol production from 1% and 1.5% NaOH pretreated RS hydrolysates was similar at ∼3.3% (w/v), corresponding to a fermentation efficiency of 86%. The non-detoxified hydrolysate was fermented using the novel yeast strain Saccharomyces cerevisiae RPP-03O without any additional supplementation of nutrients.
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Affiliation(s)
- Selim Ashoor
- Department of Agricultural Microbiology, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Rajeev K Sukumaran
- Biofuels and Biorefineries Section, Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
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13
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Coniglio RO, Díaz GV, Fonseca MI, Castrillo ML, Piccinni FE, Villalba LL, Campos E, Zapata PD. Enzymatic hydrolysis of barley straw for biofuel industry using a novel strain of Trametes villosa from Paranaense rainforest. Prep Biochem Biotechnol 2020; 50:753-762. [PMID: 32153244 DOI: 10.1080/10826068.2020.1734941] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Agricultural practices generate lignocellulosic waste that can be bioconverted by fungi to generate value-added products such as biofuels. In this context, fungal enzymes are presented as an alternative for their use in the hydrolysis of cellulose to sugars that can be fermented to ethanol. The aim of this work was to characterize LBM 033 strain and to analyze its efficiency in the hydrolysis of cellulosic substrates, including barley straw. LBM 033 strain was identified as Trametes villosa by molecular techniques, through the use of the ITS and rbp2 markers and the construction of phylogenetic trees. The cell-free supernatant of T. villosa LBM 033 showed high titers of hydrolytic enzymatic activities, necessary for the hydrolysis of the holocellulosic substrates, hydrolyzing pure cellulose to cellobiose and glucose and also degraded the polysaccharides contained in barley straw to short soluble oligosaccharides. These results indicate that macro fungi from tropical soil environments, such as T. villosa LBM 033 can be a valuable resource for in-house, cost effective production of enzymes that can be applied in the hydrolysis stage, which could reduce the total cost of bioethanol production.
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Affiliation(s)
- Romina O Coniglio
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
| | - Gabriela V Díaz
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
| | - María I Fonseca
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
| | - María L Castrillo
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
| | - Florencia E Piccinni
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA/CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Buenos Aires, Argentina
| | - Laura L Villalba
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
| | - Eleonora Campos
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA/CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Buenos Aires, Argentina
| | - Pedro D Zapata
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, CONICET, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones (UNaM), Posadas, Misiones, Argentina
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Zheng W, Lan T, Li H, Yue G, Zhou H. Exploring why sodium lignosulfonate influenced enzymatic hydrolysis efficiency of cellulose from the perspective of substrate-enzyme adsorption. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:19. [PMID: 32015757 PMCID: PMC6990501 DOI: 10.1186/s13068-020-1659-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/17/2020] [Indexed: 05/09/2023]
Abstract
BACKGROUND Cellulase adsorbed on cellulose is productive and helpful to produce reducing sugars in enzymatic hydrolysis of lignocellulose; however, cellulase adsorbed on lignin is non-productive. Increasing productive adsorption of cellulase on cellulose would be beneficial in improving enzymatic hydrolysis. Adding lignin that was more hydrophilic in hydrolysis system could increase productive adsorption and promote hydrolysis. However, the effect mechanism is still worth exploring further. In this study, lignosulfonate (LS), a type of hydrophilic lignin, was used to study its effect on cellulosic hydrolysis. RESULTS The effect of LS on the enzymatic hydrolysis of pure cellulose (Avicel) and lignocellulose [dilute acid (DA) treated sugarcane bagasse (SCB)] was investigated by analyzing enzymatic hydrolysis efficiency, productive and non-productive cellulase adsorptions, zeta potential and particle size distribution of substrates. The result showed that after adding LS, the productive cellulase adsorption on Avicel reduced. Adding LS to Avicel suspension could form the Avicel-LS complexes. The particles were charged more negatively and the average particle size was smaller than Avicel before adding LS. In addition, adding LS to cellulase solution formed the LS-cellulase complexes. For DA-SCB, adding LS decreased the non-productive cellulase adsorption on DA-SCB from 3.92 to 2.99 mg/g lignin and increased the productive adsorption of cellulase on DA-SCB from 2.00 to 3.44 mg/g cellulose. Besides, the addition of LS promoted the formation of LS-lignin complexes and LS-cellulase complexes, and the complexes had more negative charges and smaller average sizes than DA-SCB lignin and cellulase particles before adding LS. CONCLUSIONS In this study, LS inhibited Avicel's hydrolysis, but enhanced DA-SCB's hydrolysis. This stemmed from the fact that LS could bind cellulase and Avicel, and occupied the binding sites of cellulase and Avicel. Thus, a decreased productive adsorption of cellulase on Avicel arose. Regarding DA-SCB, adding LS, which enhanced hydrolysis efficiency of DA-SCB, increased the electrostatic repulsion between DA-SCB lignin and cellulase, and therefore, decreased non-productive adsorption of cellulase on DA-SCB lignin and enhanced productive adsorption of cellulase on DA-SCB cellulose.
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Affiliation(s)
- Wenqiu Zheng
- Faculty of Agriculture and Food, Kunming University of Science and Technology, 727 South Jingming Rd, Chenggong District, Kunming, 650500 China
| | - Tianqing Lan
- Faculty of Agriculture and Food, Kunming University of Science and Technology, 727 South Jingming Rd, Chenggong District, Kunming, 650500 China
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, No. 381 Wushan Rd, Guangzhou, 510640 China
| | - Hui Li
- Faculty of Agriculture and Food, Kunming University of Science and Technology, 727 South Jingming Rd, Chenggong District, Kunming, 650500 China
| | - Guojun Yue
- SDIC Biotech Investment CO., LTD, No. 147 Xizhimen Nanxiao Street, Xicheng District, Beijing, 100034 China
| | - Haifeng Zhou
- College of Chemical and Environmental Engineering, Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao, 277590 China
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Evaluation of Copper-Contaminated Marginal Land for the Cultivation of Vetiver Grass (Chrysopogon zizanioides) as a Lignocellulosic Feedstock and its Impact on Downstream Bioethanol Production. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9132685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Metal-contaminated soil could be sustainably used for biofuel feedstock production if the harvested biomass is amenable to bioethanol production. A 60-day greenhouse experiment was performed to evaluate (1) the potential of vetiver grass to phytostabilize soil contaminated with copper (Cu), and (2) the impact of Cu exposure on its lignocellulosic composition and downstream bioethanol production. Dilute acid pretreatment, enzymatic hydrolysis, and fermentation parameters were optimized sequentially for vetiver grass using response surface methodology (RSM). Results indicate that the lignocellulosic composition of vetiver grown on Cu-rich soil was favorably altered with a significant decrease in lignin and increase in hemicellulose and cellulose content. Hydrolysates produced from Cu exposed biomass achieved a significantly greater ethanol yield and volumetric productivity compared to those of the control biomass. Upon pretreatment, the hemicellulosic hydrolysate showed an increase in total sugars per liter by 204.7% of the predicted yield. After fermentation, 110% of the predicted ethanol yield was obtained for the vetiver grown on Cu-contaminated soil. By contrast, for vetiver grown on uncontaminated soil a 62.3% of theoretical ethanol yield was achieved, indicating that vetiver has the potential to serve the dual purpose of phytoremediation and biofuel feedstock generation on contaminated sites.
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16
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Kumar V, Patel SKS, Gupta RK, Otari SV, Gao H, Lee J, Zhang L. Enhanced Saccharification and Fermentation of Rice Straw by Reducing the Concentration of Phenolic Compounds Using an Immobilized Enzyme Cocktail. Biotechnol J 2019; 14:e1800468. [DOI: 10.1002/biot.201800468] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 02/28/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Virendra Kumar
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Life Sciences, Gutian Edible Fungi Research InstituteFujian Agriculture and Forestry University Fuzhou Fujian Province 350002 P. R. China
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Sanjay K. S. Patel
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Rahul K. Gupta
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Sachin V. Otari
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Hui Gao
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Jung‐Kul Lee
- Department of Chemical EngineeringKonkuk UniversitySeoul 05029 South Korea
| | - Liaoyuan Zhang
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Life Sciences, Gutian Edible Fungi Research InstituteFujian Agriculture and Forestry University Fuzhou Fujian Province 350002 P. R. China
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17
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Suberu Y, Akande I, Samuel T, Lawal A, Olaniran A. Optimization of protease production in indigenous Bacillus species isolated from soil samples in Lagos, Nigeria using response surface methodology. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.01.049] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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An Insight into Fungal Cellulases and Their Industrial Applications. Fungal Biol 2019. [DOI: 10.1007/978-3-030-14726-6_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Mikulski D, Kłosowski G. Efficiency of dilute sulfuric acid pretreatment of distillery stillage in the production of cellulosic ethanol. BIORESOURCE TECHNOLOGY 2018; 268:424-433. [PMID: 30103168 DOI: 10.1016/j.biortech.2018.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
The aim of this study was to examine suitability of distillery stillage of various origins subjected to dilute sulfuric acidic pretreatment for production of cellulosic ethanol. Optimal conditions for dilute acid pretreatment of: rye and wheat distillery stillage 121 °C, 0.2 M H2SO4, 60 min; maize stillage 131 °C, 0.2 M H2SO4, 60 min. The highest efficiency of enzymatic hydrolysis was achieved for rye and wheat stillage using 1 g of DW and the concentration of cellulolytic enzyme of 24% w/w, and for maize stillage 3 g of DW and enzyme concentration of 24% w/w. The use of rye and wheat stillage for production of ethanol does not require a detoxification process and enables full attenuation of glucose after 48 h of the process. However, the use of maize stillage as a raw material must be preceded by a detoxification process that guarantees a reduction of 5-hydroxymethylfurfural concentration in the fermentation medium.
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Affiliation(s)
- D Mikulski
- Kazimierz Wielki University, Department of Biotechnology, 85-671 Bydgoszcz, ul. K. J. Poniatowskiego 12, Poland
| | - G Kłosowski
- Kazimierz Wielki University, Department of Biotechnology, 85-671 Bydgoszcz, ul. K. J. Poniatowskiego 12, Poland.
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20
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Park SY, Hwang SH, Lee JH. Saccharification and alcohol fermentation characteristics of barley malt preparations for use in organic processed food. J Food Biochem 2018. [DOI: 10.1111/jfbc.12581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Song-Yi Park
- Department of Food Science and Biotechnology; CHA University; Seongnam Gyeonggi-do Republic of Korea
| | - Se-Hee Hwang
- College of Pharmacy; Chungang University; Dongjak-gu Seoul Republic of Korea
| | - Jin-Hee Lee
- Department of Food Science and Biotechnology; CHA University; Seongnam Gyeonggi-do Republic of Korea
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21
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Production of ethanol and xylitol by Trametes membranacea. Bioprocess Biosyst Eng 2018; 41:1017-1028. [DOI: 10.1007/s00449-018-1931-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 03/27/2018] [Indexed: 10/17/2022]
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22
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Flow-Through Pretreatment of Corn Stover by Recycling Organosolv to Reduce Waste Solvent. ENERGIES 2018. [DOI: 10.3390/en11040879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Lv X, Xiong C, Li S, Chen X, Xiao W, Zhang D, Li J, Gong Y, Lin J, Liu Z. Vacuum-assisted alkaline pretreatment as an innovative approach for enhancing fermentable sugar yield and decreasing inhibitor production of sugarcane bagasse. BIORESOURCE TECHNOLOGY 2017; 239:402-411. [PMID: 28538197 DOI: 10.1016/j.biortech.2017.04.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/12/2017] [Accepted: 04/13/2017] [Indexed: 06/07/2023]
Abstract
Sodium hydroxide pretreatment of sugarcane bagasse under vacuum conditions was established and evaluated in this study. Compared to pretreatment under conventional moderate pressure conditions, only half of the total phenolic compounds and less than half of the formic acid were produced under vacuum conditions, while the yield of total fermentable sugar was significantly increased by 31.38%. The pretreatment parameters: NaOH concentration, pretreatment time, and pretreatment temperature, were optimized using response surface methodology based on the response values of the total fermentable sugar yield (TFSY) and the total fermentable sugar concentration (TFSC), respectively. Under the optimal conditions, the TFSY of 0.5146g/g and the TFSC of 17.37g/L were achieved, respectively. By adjusting the ratio of cellulases to xylanase, the TFSY reached a maximum of 0.5213g/g when the ratio was 1:1, while the maximum TFSC of 17.71g/L was achieved when the ratio was 1:4.
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Affiliation(s)
- Xiaojing Lv
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Chunjiang Xiong
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China; Research and Development Department, Guangdong Qizhi Biotechnology Co., Ltd., Guangzhou, PR China
| | - Shuai Li
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Xiaodong Chen
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Wenjuan Xiao
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Dou Zhang
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Jiasheng Li
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Yingxue Gong
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Jianghai Lin
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Zehuan Liu
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China.
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24
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Optimization of saccharification conditions of black rice (cv. Poireton) using microbial strains through response surface methodology. JOURNAL OF THE INSTITUTE OF BREWING 2017. [DOI: 10.1002/jib.430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Kumar A, Dutt D, Gautam A. Production of crude enzyme from Aspergillus nidulans AKB-25 using black gram residue as the substrate and its industrial applications. J Genet Eng Biotechnol 2016; 14:107-118. [PMID: 30647604 PMCID: PMC6299890 DOI: 10.1016/j.jgeb.2016.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/07/2016] [Accepted: 06/18/2016] [Indexed: 10/25/2022]
Abstract
The production of crop residues in India is estimated to be about 500-550 million tons annually. It is estimated that about 93 million tons of crop residues is burnt annually which is not only wastage of valuable biomass resources but pollution of the environment with the production of green house gases also. Among different low cost crop residues, black gram residue as the substrate produced maximal endoglucanase, FPase, and β-glucosidase activities from Aspergillus nidulans AKB-25 under solid-state fermentation. During optimisation of cultural parameters A. nidulans AKB-25 produced maximal endoglucanase (152.14 IU/gds), FPase (3.42 FPU/gds) and xylanase (2441.03 IU/gds) activities. The crude enzyme was found effective for the saccharification of pearl millet stover and bio-deinking of mixed office waste paper. The crude enzyme from A. nidulans AKB-25 produced maximum fermentable sugars of 546.91 mg/g from alkali-pretreated pearl millet stover by saccharification process at a dose of 15 FPU/g of substrate. Pulp brightness and deinking efficiency of mixed office waste paper improved by 4.6% and 25.01% respectively and mitigated dirt counts by 74.70% after bio-deinking. Physical strength properties like burst index, tensile index and double fold number were also improved during bio-deinking of mixed office waste paper.
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Affiliation(s)
- Amit Kumar
- Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247 001, India
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26
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Zeng R, Yin XY, Ruan T, Hu Q, Hou YL, Zuo ZY, Huang H, Yang ZH. A Novel Cellulase Produced by a Newly Isolated Trichoderma virens. Bioengineering (Basel) 2016; 3:bioengineering3020013. [PMID: 28952575 PMCID: PMC5597137 DOI: 10.3390/bioengineering3020013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/11/2016] [Accepted: 04/15/2016] [Indexed: 12/03/2022] Open
Abstract
Screening and obtaining a novel high activity cellulase and its producing microbe strain is the most important and essential way to improve the utilization of crop straw. In this paper, we devoted our efforts to isolating a novel microbe strain which could produce high activity cellulase. A novel strain Trichoderma virens ZY-01 was isolated from a cropland where straw is rich and decomposed, by using the soil dilution plate method with cellulose and Congo red. The strain has been licensed with a patent numbered ZL 201210295819.6. The cellulase activity in the cultivation broth could reach up to 7.4 IU/mL at a non-optimized fermentation condition with the newly isolated T. virens ZY-01. The cellulase was separated and purified from the T. virens culture broth through (NH4)2SO4 fractional precipitation, anion-exchange chromatography and gel filtration chromatography. With the separation process, the CMC specific activity increased from 0.88 IU/mg to 31.5 IU/mg with 35.8 purification fold and 47.04% yield. Furthermore, the enzymatic properties of the cellulase were investigated. The optimum temperature and pH is 50 °C and pH 5.0 and it has good thermal stability. Zn2+, Ca2+ and Mn2+ could remarkably promote the enzyme activity. Conversely, Cu2+ and Co2+ could inhibit the enzymatic activity. This work provides a new highly efficient T. virens strain for cellulase production and shows good prospects in practical application.
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Affiliation(s)
- Rong Zeng
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Xiao-Yan Yin
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Tao Ruan
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Qiao Hu
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Ya-Li Hou
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Zhen-Yu Zuo
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Hao Huang
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Zhong-Hua Yang
- College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China.
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27
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Du SK, Su X, Yang W, Wang Y, Kuang M, Ma L, Fang D, Zhou D. Enzymatic saccharification of high pressure assist-alkali pretreated cotton stalk and structural characterization. Carbohydr Polym 2016; 140:279-86. [DOI: 10.1016/j.carbpol.2015.12.056] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 12/14/2015] [Accepted: 12/23/2015] [Indexed: 12/14/2022]
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28
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Chandra Rajak R, Banerjee R. Enzyme mediated biomass pretreatment and hydrolysis: a biotechnological venture towards bioethanol production. RSC Adv 2016. [DOI: 10.1039/c6ra09541k] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biobased processes are gaining major interest worldwide with considerable efforts now being applied to developing efficient technologies for bioresource utilization.
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Affiliation(s)
- Rajiv Chandra Rajak
- Advanced Technology and Development Centre
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Rintu Banerjee
- Agricultural & Food Engineering Department
- Indian Institute of Technology
- Kharagpur-721302
- India
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29
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Velmurugan R, Incharoensakdi A. Proper ultrasound treatment increases ethanol production from simultaneous saccharification and fermentation of sugarcane bagasse. RSC Adv 2016. [DOI: 10.1039/c6ra17792a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To improve the saccharification and fermentation processes, proper ultrasound was applied which resulted in the presence of cellulase complex with improved β-glucosidase ratio leading to enhanced overall ethanol yield.
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30
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Wood IP, Cao HG, Tran L, Cook N, Ryden P, Wilson DR, Moates GK, Collins SRA, Elliston A, Waldron KW. Comparison of saccharification and fermentation of steam exploded rice straw and rice husk. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:193. [PMID: 27602056 PMCID: PMC5011935 DOI: 10.1186/s13068-016-0599-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/19/2016] [Indexed: 05/09/2023]
Abstract
BACKGROUND Rice cultivation produces two waste streams, straw and husk, which could be exploited more effectively. Chemical pretreatment studies using rice residues have largely focussed on straw exploitation alone, and often at low substrate concentrations. Moreover, it is currently not known how rice husk, the more recalcitrant residue, responds to steam explosion without the addition of chemicals. RESULTS The aim of this study has been to systematically compare the effects of steam explosion severity on the enzymatic saccharification and simultaneous saccharification and fermentation of rice straw and husk produced from a variety widely grown in Vietnam (Oryza sativa, cv. KhangDan18). Rice straw and husk were steam exploded (180-230 °C for 10 min) into hot water and washed to remove fermentation inhibitors. In both cases, pretreatment at 210 °C and above removed most of the noncellulosic sugars. Prolonged saccharification at high cellulase doses showed that rice straw could be saccharified most effectively after steam explosion at 210 °C for 10 min. In contrast, rice husk required more severe pretreatment conditions (220 °C for 10 min), and achieved a much lower yield (75 %), even at optimal conditions. Rice husk also required a higher cellulase dose for optimal saccharification (10 instead of 6 FPU/g DM). Hemicellulase addition failed to improve saccharification. Small pilot scale saccharification at 20 % (w/v) substrate loading in a 10 L high torque bioreactor resulted in similarly high glucose yields for straw (reaching 9 % w/v), but much less for husk. Simultaneous saccharification and fermentation under optimal pretreatment and saccharification conditions showed similar trends, but the ethanol yield from the rice husk was less than 40 % of the theoretical yield. CONCLUSIONS Despite having similar carbohydrate compositions, pretreated rice husk is much less amenable to saccharification than pretreated rice straw. This is likely to attenuate its use as a biorefinery feedstock unless improvements can be made either in the feedstock through breeding and/or modern biotechnology, or in the pretreatment through the employment of improved or alternative technologies. Physiological differences in the overall chemistry or structure may provide clues to the nature of lignocellulosic recalcitrance.
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Affiliation(s)
- Ian P. Wood
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | | | - Long Tran
- Vietnam Academy of Agricultural Science, Hanoi, Vietnam
| | - Nicola Cook
- The Earlham Institute, Norwich Research Park, Norwich, NR4 7UG UK
| | - Peter Ryden
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - David R. Wilson
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Graham K. Moates
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Samuel R. A. Collins
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Adam Elliston
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Keith W. Waldron
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
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Dixit G, Shah AR, Madamwar D, Narra M. High solid saccharification using mild alkali-pretreated rice straw by hyper-cellulolytic fungal strain. BIORESOUR BIOPROCESS 2015. [DOI: 10.1186/s40643-015-0075-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Das B, Roy AP, Bhattacharjee S, Chakraborty S, Bhattacharjee C. Lactose hydrolysis by β-galactosidase enzyme: optimization using response surface methodology. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 121:244-252. [PMID: 25842188 DOI: 10.1016/j.ecoenv.2015.03.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/13/2015] [Accepted: 03/23/2015] [Indexed: 06/04/2023]
Abstract
In the present study, it was aimed to optimize the process of lactose hydrolysis using free and immobilized β-galactosidase to produce glucose and galactose. Response surface methodology (RSM) by central composite design (CCD) was employed to optimize the degree of hydrolysis by varying three parameters, temperature (15-45°C), solution pH (5-9) and β-galactosidase enzyme concentration (2-8mg/mL) for free mode of analysis and sodium alginate concentration (2-4%), calcium chloride concentration (3-6%) and enzyme concentration (2-8mg/mL) for immobilized process. Based on plots and variance analysis, the optimum operational conditions for maximizing lactose hydrolysis were found to be temperature (35.5°C), pH (6.7) and enzyme concentration (6.7mg/mL) in free mode and sodium alginate concentration (3%), calcium chloride concentration (5.9%) and enzyme concentration (5.2mg/mL) in immobilized mode.
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Affiliation(s)
- Bipasha Das
- Chemical Engineering Department, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Ananda Prasad Roy
- Chemical Engineering Department, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Sangita Bhattacharjee
- Chemical Engineering Department, Heritage Institute of Technology, Kolkata 700107, West Bengal, India.
| | - Sudip Chakraborty
- Department of Chemical Engineering and Materials, University of Calabria, Cubo-44A, 87036 Rende, CS, Italy
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Design and optimization of a sono-hybrid process for bioethanol production from Parthenium hysterophorus. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2015.01.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Samaratunga A, Kudina O, Nahar N, Zakharchenko A, Minko S, Voronov A, Pryor SW. Modeling the Effect of pH and Temperature for Cellulases Immobilized on Enzymogel Nanoparticles. Appl Biochem Biotechnol 2015; 176:1114-30. [DOI: 10.1007/s12010-015-1633-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 04/20/2015] [Indexed: 11/28/2022]
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Design of a single chambered microbial electrolytic cell reactor for production of biohydrogen from rice straw hydrolysate. Biotechnol Lett 2015; 37:1213-9. [DOI: 10.1007/s10529-015-1780-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Accepted: 01/22/2015] [Indexed: 10/24/2022]
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Nikzad M, Movagharnejad K, Talebnia F, Aghaiy Z, Mighani M. Modeling of Alkali Pretreatment of Rice Husk Using Response Surface Methodology and Artificial Neural Network. CHEM ENG COMMUN 2015. [DOI: 10.1080/00986445.2013.871707] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang Q, Lin Y, Shen S, Xing Z, Ruan X. Simulation and Optimization on Cellulase Immobilization Using Response Surface Methodology. ACTA ACUST UNITED AC 2015. [DOI: 10.7763/ijesd.2015.v6.677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Rahnama N, Foo HL, Abdul Rahman NA, Ariff A, Md Shah UK. Saccharification of rice straw by cellulase from a local Trichoderma harzianum SNRS3 for biobutanol production. BMC Biotechnol 2014; 14:103. [PMID: 25496491 PMCID: PMC4298951 DOI: 10.1186/s12896-014-0103-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 11/27/2014] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Rice straw has shown to be a promising agricultural by-product in the bioconversion of biomass to value-added products. Hydrolysis of cellulose, a main constituent of lignocellulosic biomass, is a requirement for fermentable sugar production and its subsequent bioconversion to biofuels such as biobutanol. The high cost of commercial enzymes is a major impediment to the industrial application of cellulases. Therefore, the use of local microbial enzymes has been suggested. Trichoderma harzianum strains are potential CMCase and β-glucosidase producers. However, few researches have been reported on cellulase production by T. harzianum and the subsequent use of the crude cellulase for cellulose enzymatic hydrolysis. For cellulose hydrolysis to be efficiently performed, the presence of the whole set of cellulase components including exoglucanase, endoglucanase, and β-glucosidase at a considerable concentration is required. Biomass recalcitrance is also a bottleneck in the bioconversion of agricultural residues to value-added products. An effective pretreatment could be of central significance in the bioconversion of biomass to biofuels. RESULTS Rice straw pretreated using various concentrations of NaOH was subjected to enzymatic hydrolysis. The saccharification of rice straw pretreated with 2% (w/v) NaOH using crude cellulase from local T. harzianum SNRS3 resulted in the production of 29.87 g/L reducing sugar and a yield of 0.6 g/g substrate. The use of rice straw hydrolysate as carbon source for biobutanol fermentation by Clostridium acetobutylicum ATCC 824 resulted in an ABE yield, ABE productivity, and biobutanol yield of 0.27 g/g glucose, 0.04 g/L/h and 0.16 g/g glucose, respectively. As a potential β-glucosidase producer, T. harzianum SNRS3 used in this study was able to produce β-glucosidase at the activity of 173.71 U/g substrate. However, for cellulose hydrolysis to be efficient, Filter Paper Activity at a considerable concentration is also required to initiate the hydrolytic reaction. According to the results of our study, FPase is a major component of cellulose hydrolytic enzyme complex system and the reducing sugar rate-limiting enzyme. CONCLUSION Our study revealed that rice straw hydrolysate served as a potential substrate for biobutanol production and FPase is a rate-limiting enzyme in saccharification.
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Affiliation(s)
- Nooshin Rahnama
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Hooi Ling Foo
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
- Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Nor Aini Abdul Rahman
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
- Bioprocessing and Biomanufacturing Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Arbakariya Ariff
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
- Bioprocessing and Biomanufacturing Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
| | - Umi Kalsom Md Shah
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
- Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
- Bioprocessing and Biomanufacturing Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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Gupta P, Parkhey P. A two-step process for efficient enzymatic saccharification of rice straw. BIORESOURCE TECHNOLOGY 2014; 173:207-215. [PMID: 25305650 DOI: 10.1016/j.biortech.2014.09.101] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 09/18/2014] [Accepted: 09/19/2014] [Indexed: 05/16/2023]
Abstract
Response surface methodology was used to optimise a two-step process of cellulase mediated saccharification of rice straw by an isolated bacterium Lysinibacillus sphaericus. CMC concentration, yeast extract, pH and incubation temperature were optimised for cellulase production using a central composite design and their optimum values were determined to be 4.3% (w/v), 2.1% (w/v), 6.2 and 45.2 °C respectively. The CMCase activity at these values was 5.16±0.07 U/ml, which was 2.5 times that of the un-optimised system. Similarly, pretreated rice straw, enzyme load, incubation time and Tween-80 concentrations were optimised for enhanced saccharification of rice straw by optimised cellulase preparations, and their optimum values were calculated as 1.84% (w/v), 40 U, 57.4 h and 0.76 mM respectively. A percent saccharification of 69.5% was reported at optimal conditions. HPLC analysis revealed that hydrolysate produced at optimal conditions of saccharification constituted 70.8% of glucose.
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Affiliation(s)
- Pratima Gupta
- Department of Biotechnology, National Institute of Technology, Raipur, C.G. 492010, India.
| | - Piyush Parkhey
- Department of Biotechnology, National Institute of Technology, Raipur, C.G. 492010, India.
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Pandiyan K, Tiwari R, Singh S, Nain PKS, Rana S, Arora A, Singh SB, Nain L. Optimization of Enzymatic Saccharification of Alkali Pretreated Parthenium sp. Using Response Surface Methodology. Enzyme Res 2014; 2014:764898. [PMID: 24900917 PMCID: PMC4036719 DOI: 10.1155/2014/764898] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 04/11/2014] [Indexed: 01/16/2023] Open
Abstract
Parthenium sp. is a noxious weed which threatens the environment and biodiversity due to its rapid invasion. This lignocellulosic weed was investigated for its potential in biofuel production by subjecting it to mild alkali pretreatment followed by enzymatic saccharification which resulted in significant amount of fermentable sugar yield (76.6%). Optimization of enzymatic hydrolysis variables such as temperature, pH, enzyme, and substrate loading was carried out using central composite design (CCD) in response to surface methodology (RSM) to achieve the maximum saccharification yield. Data obtained from RSM was validated using ANOVA. After the optimization process, a model was proposed with predicted value of 80.08% saccharification yield under optimum conditions which was confirmed by the experimental value of 85.80%. This illustrated a good agreement between predicted and experimental response (saccharification yield). The saccharification yield was enhanced by enzyme loading and reduced by temperature and substrate loading. This study reveals that under optimized condition, sugar yield was significantly increased which was higher than earlier reports and promises the use of Parthenium sp. biomass as a feedstock for bioethanol production.
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Affiliation(s)
- K. Pandiyan
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Rameshwar Tiwari
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Surender Singh
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Pawan K. S. Nain
- School of Civil & Mechanical Engineering, Galgotias University, Greater Noida, Uttar Pradesh 201306, India
| | - Sarika Rana
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Anju Arora
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Shashi B. Singh
- Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi 110012, India
| | - Lata Nain
- Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India
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Okamoto K, Uchii A, Kanawaku R, Yanase H. Bioconversion of xylose, hexoses and biomass to ethanol by a new isolate of the white rot basidiomycete Trametes versicolor. SPRINGERPLUS 2014; 3:121. [PMID: 24624317 PMCID: PMC3950376 DOI: 10.1186/2193-1801-3-121] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 02/20/2014] [Indexed: 11/17/2022]
Abstract
Second-generation bioethanol production requires the development of economically feasible and sustainable processes that use renewable lignocellulosic biomass as a starting material. However, the microbial fermentation of xylose, which is the principal pentose sugar in hemicellulose, is a limiting factor in developing such processes. Here, a strain of the white rot basidiomycete Trametes versicolor that was capable of efficiently fermenting xylose was newly isolated and characterized. This strain, designated KT9427, was capable of assimilating and converting xylose to ethanol under anaerobic conditions with a yield of 0.44 g ethanol per 1 g of sugar consumed. In culture medium containing low yeast extract concentrations, xylose consumption and ethanol productivity were enhanced. Adjusting the initial pH between 3.0 and 5.0 did not markedly influence xylose fermentation. T. versicolor KT9427 also produced ethanol from glucose, mannose, fructose, cellobiose and maltose at yields ranging from 0.45 to 0.49 g ethanol per 1 g of sugar consumed. In addition, strain KT9427 exhibited favourable conversion of non-pretreated starch, cellulose, xylan, wheat bran and rice straw into ethanol compared to common recombinant yeast strains. Taken together, the present findings suggest that T. versicolor KT9427 is a promising candidate for environmentally friendly ethanol production directly from lignocellulosic biomass.
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Affiliation(s)
- Kenji Okamoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama, Tottori, 680-8552 Japan
| | - Atsushi Uchii
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama, Tottori, 680-8552 Japan
| | - Ryuichi Kanawaku
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama, Tottori, 680-8552 Japan
| | - Hideshi Yanase
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama, Tottori, 680-8552 Japan
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Xu CJ, Cao GL, Zhao L, Wang AJ, Chen LN, Ren NQ. A dual-chamber reactor to assess the saccharification capability of the cellulytic microflora from straw waste. RSC Adv 2014. [DOI: 10.1039/c3ra46948d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Sandhu SK, Oberoi HS, Babbar N, Miglani K, Chadha BS, Nanda DK. Two-stage statistical medium optimization for augmented cellulase production via solid-state fermentation by newly isolated Aspergillus niger HN-1 and application of crude cellulase consortium in hydrolysis of rice straw. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:12653-12661. [PMID: 24328069 DOI: 10.1021/jf403083g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cellulolytic enzyme production by newly isolated Aspergillus niger HN-1 was statistically optimized using Plackett-Burman and central composite design (CCD). Optimum concentrations of 2, 0.40, 0.01, and 0.60 g L (-1) for KH2PO4, urea, trace elements solution, and CaCl2·2H2O, respectively, were suggested by Design-Expert software. The two-stage optimization process led to a 3- and 2-fold increases in the filter paper cellulase (FP) and β-glucosidase activities, respectively. FP, β-glucosidase, endoglucanase, exopolygalaturonase, cellobiohydrolase, xylanase, α-l-arabinofuranosidase, β-xylosidase, and xylan esterase activities of 36.7 ± 1.54 FPU gds(-1), 252.3 ± 7.4 IU gds(-1), 416.3 ± 22.8 IU gds(-1), 111.2 ± 5.4 IU gds(-1), 8.9 ± 0.50 IU gds(-1), 2593.5 ± 78.9 IU gds(-1), 79.4 ± 4.3 IU gds(-1), 180.8 ± 9.3 IU gds(-1), and 288.7 ± 11.8 IU gds(-1), respectively, were obtained through solid-state fermentation during the validation studies. Hydrolysis of alkali-treated rice straw with crude cellulases resulted in about 84% glucan to glucose, 89% xylan to xylose, and 91% arabinan to arabinose conversions, indicating potential for biomass hydrolysis by the crude cellulase consortium obtained in this study.
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Affiliation(s)
- Simranjeet Kaur Sandhu
- Central Institute of Post-Harvest Engineering and Technology, P.O. PAU, Ludhiana 141 004, India
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Study of chemical pretreatment and enzymatic saccharification for producing fermentable sugars from rice straw. Bioprocess Biosyst Eng 2013; 37:1337-44. [DOI: 10.1007/s00449-013-1106-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 11/29/2013] [Indexed: 10/25/2022]
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Tsujiyama SI, Ueno H. Performance of wood-rotting fungi-based enzymes on enzymic saccharification of rice straw. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:2841-2848. [PMID: 23450755 DOI: 10.1002/jsfa.6118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 02/12/2013] [Accepted: 02/28/2013] [Indexed: 06/01/2023]
Abstract
BACKGROUND For effective saccharification of rice straw we focused on enzyme preparations from wood-rotting fungi that have the ability to degrade cell wall polysaccharides and lignin. We tested extracellular enzyme preparations from 14 species of fungi for saccharification activity and examined the factor for saccharification by statistical analysis. RESULTS An enzyme preparation from Schizophyllum commune had the highest saccharification activity of rice straw. This preparation contained highly active endo-β-xylanase, endo-β-glucanase (CMCase), β-d-glucosidase and acetylxylan esterase. Correlation analysis of the 14 enzyme preparations demonstrated that acetylxylan esterase was closely related to saccharification activity in rice straw. Multiple regression analysis also showed that acetylxylan esterase had an important role in saccharification. Ligninolytic enzymes, which are characteristic of white-rot fungi, did not contribute to saccharification activity of rice straw. CONCLUSION Deacetylation is an essential factor for saccharification of rice straw and enzyme preparations for saccharification need to contain highly active acetylxylan esterase as well as highly active cellulolytic and xylanolytic enzymes, but not ligninolytic ones.
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Affiliation(s)
- Sho-Ichi Tsujiyama
- Laboratory of Chemistry for Forest Bioresources, Graduate School of Life and Environmental Science, Kyoto Prefectural University, Kyoto, 606-8522, Japan
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46
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Pandiyan K, Tiwari R, Rana S, Arora A, Singh S, Saxena AK, Nain L. Comparative efficiency of different pretreatment methods on enzymatic digestibility of Parthenium sp. World J Microbiol Biotechnol 2013; 30:55-64. [DOI: 10.1007/s11274-013-1422-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 06/27/2013] [Indexed: 10/26/2022]
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Palaniyandi SA, Yang SH, Suh JW. Cellulase production and saccharification of rice straw by the mutant strainHypocrea koningiiRSC1. J Basic Microbiol 2013; 54:56-65. [DOI: 10.1002/jobm.201200309] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 09/29/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Sasikumar Arunachalam Palaniyandi
- Center for Nutraceutical and Pharmaceutical Materials; Myongji University; Cheoin-gu, Yongin Gyeonggi-Do Korea
- Division of Bioscience and Bioinformatics; College of Natural Science, Myongji University; Cheoin-gu, Yongin Gyeonggi-Do Korea
| | - Seung Hwan Yang
- Center for Nutraceutical and Pharmaceutical Materials; Myongji University; Cheoin-gu, Yongin Gyeonggi-Do Korea
| | - Joo-Won Suh
- Center for Nutraceutical and Pharmaceutical Materials; Myongji University; Cheoin-gu, Yongin Gyeonggi-Do Korea
- Division of Bioscience and Bioinformatics; College of Natural Science, Myongji University; Cheoin-gu, Yongin Gyeonggi-Do Korea
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48
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Statistical optimization of enzymatic degradation process for oil palm empty fruit bunch (OPEFB) in rotary drum bioreactor using crude cellulase produced from Aspergillus niger EFB1. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.03.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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p-Hydroxycinnamic acid production directly from cellulose using endoglucanase- and tyrosine ammonia lyase-expressing Streptomyces lividans. Microb Cell Fact 2013; 12:45. [PMID: 23651460 PMCID: PMC3668229 DOI: 10.1186/1475-2859-12-45] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 04/14/2013] [Indexed: 12/04/2022] Open
Abstract
Background p-Hydroxycinnamic acid (pHCA) is an aromatic compound that serves as a starting material for the production of many commercially valuable chemicals, such as fragrances and pharmaceuticals, and is also used in the synthesis of thermostable polymers. However, chemical synthesis of pHCA is both costly and harmful to the environment. Although pHCA production using microbes has been widely studied, there remains a need for more cost-effective methods, such as the use of biomass as a carbon source. In this study, we produced pHCA using tyrosine ammonia lyase-expressing Streptomyces lividans. In order to improve pHCA productivity from cellulose, we constructed a tyrosine ammonia lyase- and endoglucanase (EG)-expressing S. lividans transformant and used it to produce pHCA from cellulose. Results A Streptomyces lividans transformant was constructed to express tyrosine ammonia lyase derived from Rhodobacter sphaeroides (RsTAL). The transformant produced 786 or 736 mg/L of pHCA after 7 days of cultivation in medium containing 1% glucose or cellobiose as the carbon source, respectively. To enhance pHCA production from phosphoric acid swollen cellulose (PASC), we introduced the gene encoding EG into RsTAL-expressing S. lividans. After 7 days of cultivation, this transformant produced 753, 743, or 500 mg/L of pHCA from 1% glucose, cellobiose, or PASC, respectively. Conclusions RsTAL-expressing S. lividans can produce pHCA from glucose and cellobiose. Similarly, RsTAL- and EG-expressing S. lividans can produce pHCA from glucose and cellobiose with excess EG activity remaining in the supernatant. This transformant demonstrated improved pHCA production from cellulose. Further enhancements in the cellulose degradation capability of the transformant will be necessary in order to achieve further improvements in pHCA production from cellulose.
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Kumar S, Gupta R, Kumar G, Sahoo D, Kuhad RC. Bioethanol production from Gracilaria verrucosa, a red alga, in a biorefinery approach. BIORESOURCE TECHNOLOGY 2013; 135:150-156. [PMID: 23312437 DOI: 10.1016/j.biortech.2012.10.120] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 10/08/2012] [Accepted: 10/09/2012] [Indexed: 06/01/2023]
Abstract
In this study, Gracilaria verrucosa, red seaweed has been used for production of agar and bioethanol. The algae harvested at various time durations resulted in extraction of ~27-33% agar. The leftover pulp was found to contain ~62-68% holocellulose, which on enzymatic hydrolysis yielded 0.87 g sugars/g cellulose. The enzymatic hydrolysate on fermentation with Saccharomyces cerevisiae produced ethanol with an ethanol yield of 0.43 g/g sugars. The mass balance evaluation of the complete process demonstrates that developing biorefinery approach for exploiting Gracilaria verrucosa, a red alga, could be commercially viable.
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Affiliation(s)
- Savindra Kumar
- Marine Biotechnology Laboratory, Department of Botany, University of Delhi, Delhi 110007, India
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