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Kadier A, Ilyas RA, Huzaifah MRM, Harihastuti N, Sapuan SM, Harussani MM, Azlin MNM, Yuliasni R, Ibrahim R, Atikah MSN, Wang J, Chandrasekhar K, Islam MA, Sharma S, Punia S, Rajasekar A, Asyraf MRM, Ishak MR. Use of Industrial Wastes as Sustainable Nutrient Sources for Bacterial Cellulose (BC) Production: Mechanism, Advances, and Future Perspectives. Polymers (Basel) 2021; 13:3365. [PMID: 34641185 PMCID: PMC8512337 DOI: 10.3390/polym13193365] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/17/2021] [Accepted: 09/22/2021] [Indexed: 12/21/2022] Open
Abstract
A novel nanomaterial, bacterial cellulose (BC), has become noteworthy recently due to its better physicochemical properties and biodegradability, which are desirable for various applications. Since cost is a significant limitation in the production of cellulose, current efforts are focused on the use of industrial waste as a cost-effective substrate for the synthesis of BC or microbial cellulose. The utilization of industrial wastes and byproduct streams as fermentation media could improve the cost-competitiveness of BC production. This paper examines the feasibility of using typical wastes generated by industry sectors as sources of nutrients (carbon and nitrogen) for the commercial-scale production of BC. Numerous preliminary findings in the literature data have revealed the potential to yield a high concentration of BC from various industrial wastes. These findings indicated the need to optimize culture conditions, aiming for improved large-scale production of BC from waste streams.
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Affiliation(s)
- Abudukeremu Kadier
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China; (A.K.); (J.W.)
| | - R. A. Ilyas
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia
- Centre for Advanced Composite Materials (CACM), Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia
| | - M. R. M. Huzaifah
- Faculty of Agricultural Science and Forestry, Bintulu Campus, Universiti Putra Malaysia, Bintulu 97000, Sarawak, Malaysia
| | - Nani Harihastuti
- Centre of Industrial Pollution Prevention Technology, The Ministry of Industry, Jawa Tengah 50136, Indonesia; (N.H.); (R.Y.)
| | - S. M. Sapuan
- Advanced Engineering Materials and Composites Research Centre (AEMC), Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (S.M.S.); (M.M.H.)
- Laboratory of Technology Biocomposite, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia;
| | - M. M. Harussani
- Advanced Engineering Materials and Composites Research Centre (AEMC), Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (S.M.S.); (M.M.H.)
| | - M. N. M. Azlin
- Laboratory of Technology Biocomposite, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia;
- Department of Textile Technology, School of Industrial Technology, Universiti Teknologi MARA, Universiti Teknologi Mara Negeri Sembilan, Kuala Pilah 72000, Negeri Sembilan, Malaysia
| | - Rustiana Yuliasni
- Centre of Industrial Pollution Prevention Technology, The Ministry of Industry, Jawa Tengah 50136, Indonesia; (N.H.); (R.Y.)
| | - R. Ibrahim
- Innovation & Commercialization Division, Forest Research Institute Malaysia, Kepong 52109, Selangor Darul Ehsan, Malaysia;
| | - M. S. N. Atikah
- Department of Chemical and Environmental Engineering Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia;
| | - Junying Wang
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China; (A.K.); (J.W.)
| | - K. Chandrasekhar
- School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea;
| | - M Amirul Islam
- Laboratory for Quantum Semiconductors and Photon-Based BioNanotechnology, Department of Electrical and Computer Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada;
| | - Shubham Sharma
- Department of Mechanical Engineering, IK Gujral Punjab Technical University, Jalandhar 144001, India;
| | - Sneh Punia
- Department of Food, Nutrition and Packaging Sciences, Clemson University, Clemson, SC 29634, USA;
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore 632115, India
| | - M. R. M. Asyraf
- Department of Aerospace Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (M.R.M.A.); (M.R.I.)
| | - M. R. Ishak
- Department of Aerospace Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (M.R.M.A.); (M.R.I.)
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Optimization of fermentation conditions for higher cellulase production using marine Bacillus licheniformis KY962963: An epiphyte of Chlorococcum sp. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Screening of Fungal Strains for Cellulolytic and Xylanolytic Activities Production and Evaluation of Brewers’ Spent Grain as Substrate for Enzyme Production by Selected Fungi. ENERGIES 2021. [DOI: 10.3390/en14154443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Brewer’s spent grain (BSG), the solid residue of beer production, is attracting significant attention as raw material for the production of added value substances, since until recently it was mainly used as animal feed or deposited in landfills, causing serious environmental problems. Therefore, this work aimed at developing a bioprocess using BSG as a substrate for the production of cellulases and xylanases for waste saccharification and bioenergy production. Different fungi were analyzed for their cellulolytic and xylanolytic abilities, through a first screening on solid media by assessment of fungal growth and enzyme production on agar containing carboxylmethylcellulose or xylan as the sole carbon source, respectively. The best cellulase and xylanase producers were subjected to quantitative evaluation of enzyme production in liquid cultures. Aspergillus niger LPB-334 was selected for its ability to produce cellulase and xylanase at high levels and it was cultivated on BSG by solid state fermentation. The cellulase production reached a maximum of 118.04 ± 8.4 U/g of dry substrate after 10 days of fermentation, while a maximum xylanase production of 1315.15 ± 37.5 U/g of dry substrate was reached after 4 days. Preliminary characterization of cellulase and xylanase activities and identification of the enzymes responsible were carried out.
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Transformation of Corn Stalk Residue to Humus-Like Substances during Solid-State Fermentation. SUSTAINABILITY 2019. [DOI: 10.3390/su11236771] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lignocellulase production from straw fermentation has been widely investigated but the research has neglected to quantify fermentation-derived residue transformation to the humus-like substance (HULIS). To investigate the conversion efficacy of corn stalk residue to HULIS, the amount of HULIS associated with chemical composition and structural changes of humic acid-like substances (HAL) was investigated in a 30 L solid-state fermentation tank during a short period of eight days. The results show that the highest decomposition rate of corn stalk and the highest activity of cellulase, xylanase, and β-glucosidase appeared at the fourth day. At the end of fermenting process, the amount of humic acid-like substances (HAL) and the percentage of HAL in humus acid (PQ value) increased 17.5% and 8.9%, respectively, indicating Trichoderma reesei facilitates the transformation of corn stalk residue to HAL. Fatty acids decreased while aromatic carbon and carboxyl content significantly increased during the ongoing fermentation, which had a positive impact on the HAL thermal stability. The FTIR spectral and thermal analysis revealed an improvement in HAL degrees of condensation, oxidation, and aromatization. The present study suggests that the residue of corn stalks fermented with T. reesei might be a good fertilizer to improve soil characteristics.
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Darabzadeh N, Hamidi‐Esfahani Z, Hejazi P. Optimization of cellulase production under solid-state fermentation by a new mutant strain of Trichoderma reesei. Food Sci Nutr 2019; 7:572-578. [PMID: 30847136 PMCID: PMC6392874 DOI: 10.1002/fsn3.852] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 11/08/2022] Open
Abstract
Nowadays, the use of agricultural by-products, as the cheap substrate for the production of value-added products, is of high interest for the researchers and practitioners. Cellulase is a relatively expensive and a very important industrial enzyme where in this study was produced form rice by-products under solid-state fermentation. A new mutant of Trichoderma reesei was used for cellulase production. The effective variables were initially screened by "Plackett and Burman design." Afterward, the main variables including moisture content, P source, incubation temperature, and incubation time were optimized by "one factor at a time design." Finally, the resulting variables including 74% for moisture content, 2 g/L for K2 HPO 4, 30°C of incubation temperature, and 4 days of incubation time were reported as the ultimate optimal condition for cellulase production.
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Affiliation(s)
- Nazanin Darabzadeh
- Department of Food Science and IndustryFaculty of AgricultureTarbiat Modares UniversityTehranIran
| | - Zohreh Hamidi‐Esfahani
- Department of Food Science and IndustryFaculty of AgricultureTarbiat Modares UniversityTehranIran
| | - Parisa Hejazi
- School of Chemical, Petroleum and Gas EngineeringIran University of Science and TechnologyTehranIran
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Comparative Study of Cellulase Production Using Submerged and Solid-State Fermentation. Fungal Biol 2019. [DOI: 10.1007/978-3-030-14726-6_3] [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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Arora S, Rani R, Ghosh S. Bioreactors in solid state fermentation technology: Design, applications and engineering aspects. J Biotechnol 2018; 269:16-34. [PMID: 29408199 DOI: 10.1016/j.jbiotec.2018.01.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 01/02/2018] [Accepted: 01/15/2018] [Indexed: 12/11/2022]
Abstract
In recent years, substantial credibility in employing Solid-State Fermentation (SSF) technique has been witnessed owing to its numerous advantages over submerged fermentation (SmF). In spite of enormous advantages, true potential of SSF technology has not been fully realized at industrial scale. The lack of rational and scalable bioreactor designs backed by mathematical models and automated control system that could successfully address heterogeneity with respect to heat and mass, and also operate aseptically, remains the prime reason for it. As a result, there still exists vast scope in SSF bioreactor research and development to facilitate broad spectrum of biotechnological applications. The present article reviews state-of-the-art in SSF technology with focus on bioreactors that have been employed for bioprocess applications, in particular, enzyme production. Based on the mode of operation, bioreactors are divided into four categories with emphasis on design features, effect of operating conditions on productivity, applications and limitations. Selected modeling studies developed over the years, have been revised and presented in problem specific manner in order to address the limitations. Some interesting designs including few recent ones that have been proposed and/or employed at pilot and industrial levels are discussed in more detail.
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Affiliation(s)
- Sidharth Arora
- Biochemical Engineering Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Richa Rani
- Biochemical Engineering Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Sanjoy Ghosh
- Biochemical Engineering Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India.
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Effect of mixing events on the production of a thermo-tolerant and acid-stable phytase in a novel solid-state fermentation bioreactor. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.06.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Finkler ATJ, Biz A, Pitol LO, Medina BS, Luithardt H, Luz LFDL, Krieger N, Mitchell DA. Intermittent agitation contributes to uniformity across the bed during pectinase production by Aspergillus niger grown in solid-state fermentation in a pilot-scale packed-bed bioreactor. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2017.01.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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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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Multiple Parameter Optimization for Maximization of Pectinase Production by Rhizopus sp. C4 under Solid State Fermentation. FERMENTATION-BASEL 2016. [DOI: 10.3390/fermentation2020010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mesa L, Salvador CA, Herrera M, Carrazana DI, González E. Cellulases by Penicillium sp. in different culture conditions. ACTA ACUST UNITED AC 2016. [DOI: 10.1515/bioeth-2016-0005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe high cost of cellulolytic enzymes used in the ethanol production process has led to a growing interest in situ production. The evaluation of the influence of several factors in the fungus Penicillium sp. cellulase production using pretreated sugarcane bagasse is very interesting. Penicillium sp. cellulase production by using filter paper as cellulosic substrate and the use of glucose, sucrose and lactose like co-substrates was assessed. In the experiments using filter paper as a cellulosic substrate, the highest FPase enzyme activity obtained was 280 FPU.L-1 using sucrose as co-substrate. Subsequently, the study of pretreated sugarcane bagasse was conducted using Plackett-Burman experimental design with analysis of 6 factors influencing the process. The highest FPase activity was 615.1 FPU.L-1. The factors influencing FPase and β- glucosidase activity were the use of molasses and the solid loading. The successful use of molasses as co-substrate opens perspectives for future researches.
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Enhanced Production of Ligninolytic Enzymes by a Mushroom Stereum ostrea. BIOTECHNOLOGY RESEARCH INTERNATIONAL 2014; 2014:815495. [PMID: 25610656 PMCID: PMC4293863 DOI: 10.1155/2014/815495] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 11/14/2014] [Accepted: 11/17/2014] [Indexed: 11/19/2022]
Abstract
The white rot fungi Stereum ostrea displayed a wide diversity in their response to supplemented inducers, surfactants, and copper sulphate in solid state fermentation. Among the inducers tested, 0.02% veratryl alcohol increased the ligninolytic enzyme production to a significant extent. The addition of copper sulphate at 300 μM concentration has a positive effect on laccase production increasing its activity by 2 times compared to control. Among the surfactants, Tween 20, Tween 80, and Triton X 100, tested in the studies, Tween 80 stimulated the production of ligninolytic enzymes. Biosorption of dyes was carried out by using two lignocellulosic wastes, rice bran and wheat bran, in 50 ppm of remazol brilliant blue and remazol brilliant violet 5R dyes. These dye adsorbed lignocelluloses were then utilized for the production of ligninolytic enzymes in solid state mode. The two dye adsorbed lignocelluloses enhanced the production of laccase and manganese peroxidase but not lignin peroxidase.
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Development of novel enzymatic bioremediation process for textile industry effluents through response surface methodology. ECOLOGICAL ENGINEERING 2014. [DOI: 10.1016/j.ecoleng.2013.09.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Bansal N, Tewari R, Soni R, Soni SK. Production of cellulases from Aspergillus niger NS-2 in solid state fermentation on agricultural and kitchen waste residues. WASTE MANAGEMENT (NEW YORK, N.Y.) 2012; 32:1341-6. [PMID: 22503148 DOI: 10.1016/j.wasman.2012.03.006] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 02/27/2012] [Accepted: 03/08/2012] [Indexed: 05/15/2023]
Abstract
Various agricultural and kitchen waste residues were assessed for their ability to support the production of a complete cellulase system by Aspergillus niger NS-2 in solid state fermentation. Untreated as well as acid and base-pretreated substrates including corn cobs, carrot peelings, composite, grass, leaves, orange peelings, pineapple peelings, potato peelings, rice husk, sugarcane bagasse, saw dust, wheat bran, wheat straw, simply moistened with water, were found to be well suited for the organism's growth, producing good amounts of cellulases after 96 h without the supplementation of additional nutritional sources. Yields of cellulases were higher in alkali treated substrates as compared to acid treated and untreated substrates except in wheat bran. Of all the substrates tested, wheat bran appeared to be the best suited substrate producing appreciable yields of CMCase, FPase and β-glucosidase at the levels of 310, 17 and 33 U/g dry substrate respectively. An evaluation of various environmental parameters demonstrated that appreciable levels of cellulases could be produced over a wide range of temperatures (20-50 °C) and pH levels (3.0-8.0) with a 1:1.5 to 1:1.75 substrate to moisture ratio.
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Affiliation(s)
- Namita Bansal
- Department of Microbiology, Panjab University, Chandigarh 160014, India
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Hii KL, Yeap SP, Mashitah MD. Cellulase production from palm oil mill effluent in Malaysia: Economical and technical perspectives. Eng Life Sci 2011. [DOI: 10.1002/elsc.201000228] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Vimala Rodhe A, Sateesh L, Sridevi J, Venkateswarlu B, Venkateswar Rao L. Enzymatic hydrolysis of sorghum straw using native cellulase produced by T. reesei NCIM 992 under solid state fermentation using rice straw. 3 Biotech 2011; 1:207-215. [PMID: 22558539 PMCID: PMC3339599 DOI: 10.1007/s13205-011-0024-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Accepted: 09/06/2011] [Indexed: 11/26/2022] Open
Abstract
Cellulose is a major constituent of renewable lignocellulosic waste available in large quantities and is considered the most important reservoir of carbon for the production of glucose, for alternative fuel and as a chemical feedstock. Over the past decade, the emphasis has been on the enzymatic hydrolysis of cellulose to glucose and the efficiency of which depends on source of cellulosic substrate, its composition, structure, pretreatment process, and reactor design. In the present study, efforts were made to produce cellulase enzyme using rice straw. The produced enzyme was used for the hydrolysis of selected lignocellulosic substrate, i.e., sorghum straw. When rice straw was used as a substrate for cellulase production under solid state fermentation, the highest enzyme activity obtained was 30.7 FPU/gds, using T. reesei NCIM 992. 25 FPU/g of cellulase was added to differently treated (native, alkali treated, alkali treated followed by 3% acid treated and alkali treated followed by 3 and 5% acid treated) sorghum straw and hydrolysis was carried out at 50 °C for 60 h. 42.5% hydrolysis was obtained after 36 h of incubation. Optimization of enzyme loading, substrate concentration, temperature, time and buffer yielded a maximum of 546.00 ± 0.55 mg/g sugars (54.60 ± 0.44 g/l) with an improved hydrolysis efficiency of 70 ± 0.45%. The enzymatic hydrolyzate can be used for fermentation of ethanol by yeasts.
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Affiliation(s)
- A. Vimala Rodhe
- Department of Microbiology, UCS, Osmania University, Hyderabad, India
| | - L. Sateesh
- Department of Microbiology, UCS, Osmania University, Hyderabad, India
| | - J. Sridevi
- Department of Microbiology, UCS, Osmania University, Hyderabad, India
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Kumar S, Sharma HK, Sarkar BC. Effect of substrate and fermentation conditions on pectinase and cellulase production by Aspergillus niger NCIM 548 in submerged (SmF) and solid state fermentation (SSF). Food Sci Biotechnol 2011. [DOI: 10.1007/s10068-011-0178-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
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19
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Cellulase production from agricultural residues by recombinant fusant strain of a fungal endophyte of the marine sponge Latrunculia corticata for production of ethanol. Antonie van Leeuwenhoek 2011; 101:331-46. [PMID: 21898149 DOI: 10.1007/s10482-011-9639-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Accepted: 08/23/2011] [Indexed: 10/17/2022]
Abstract
Several fungal endophytes of the Egyptian marine sponge Latrunculia corticata were isolated, including strains Trichoderma sp. Merv6, Penicillium sp. Merv2 and Aspergillus sp. Merv70. These fungi exhibited high cellulase activity using different lignocellulosic substrates in solid state fermentations (SSF). By applying mutagenesis and intergeneric protoplast fusion, we have obtained a recombinant strain (Tahrir-25) that overproduced cellulases (exo-β-1,4-glucanase, endo-β-1,4-glucanase and β-1,4-glucosidase) that facilitated complete cellulolysis of agricultural residues. The process parameters for cellulase production by strain Tahrir-25 were optimized in SSF. The highest cellulase recovery from fermentation slurries was achieved with 0.2% Tween 80 as leaching agent. Enzyme production was optimized under the following conditions: initial moisture content of 60% (v/w), inoculum size of 10(6) spores ml(-1), average substrate particle size of 1.0 mm, mixture of sugarcane bagasse and corncob (2:1) as the carbon source supplemented with carboxymethyl cellulose (CMC) and corn steep solids, fermentation time of 7 days, medium pH of 5.5 at 30°C. These optimized conditions yielded 450, 191, and 225 units/gram dry substrate (U gds(-1)) of carboxylmethyl cellulase, filter-paperase (FPase), and β-glucosidase, respectively. Subsequent fermentation by the yeast, Saccharomyces cerevisiae NRC2, using lignocellulose hydrolysates obtained from the optimized cellulase process produced the highest amount of ethanol (58 g l(-1)). This study has revealed the potential of exploiting marine fungi for cost-effective production of cellulases for second generation bioethanol processes.
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