1
|
Duong HL, Paufler S, Harms H, Maskow T, Schlosser D. Biocalorimetry-aided monitoring of fungal pretreatment of lignocellulosic agricultural residues. Appl Microbiol Biotechnol 2024; 108:394. [PMID: 38918217 PMCID: PMC11199272 DOI: 10.1007/s00253-024-13234-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 06/05/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024]
Abstract
The present study aimed to investigate whether and how non-invasive biocalorimetric measurements could serve for process monitoring of fungal pretreatment during solid-state fermentation (SSF) of lignocellulosic agricultural residues such as wheat straw. Seven filamentous fungi representing different lignocellulose decay types were employed. Water-soluble sugars being immediately available after fungal pretreatment and those becoming water-extractable after enzymatic digestion of pretreated wheat straw with hydrolysing (hemi)cellulases were considered to constitute the total bioaccessible sugar fraction. The latter was used to indicate the success of pretreatments and linked to corresponding species-specific metabolic heat yield coefficients (YQ/X) derived from metabolic heat flux measurements during fungal wheat straw colonisation. An YQ/X range of about 120 to 140 kJ/g was seemingly optimal for pretreatment upon consideration of all investigated fungi and application of a non-linear Gaussian fitting model. Upon exclusion from analysis of the brown-rot basidiomycete Gloeophyllum trabeum, which differs from all other here investigated fungi in employing extracellular Fenton chemistry for lignocellulose decomposition, a linear relationship where amounts of total bioaccessible sugars were suggested to increase with increasing YQ/X values was obtained. It remains to be elucidated whether an YQ/X range being optimal for fungal pretreatment could firmly be established, or if the sugar accessibility for post-treatment generally increases with increasing YQ/X values as long as "conventional" enzymatic, i.e. (hemi)cellulase-based, lignocellulose decomposition mechanisms are operative. In any case, metabolic heat measurement-derived parameters such as YQ/X values may become very valuable tools supporting the assessment of the suitability of different fungal species for pretreatment of lignocellulosic substrates. KEY POINTS: • Biocalorimetry was used to monitor wheat straw pretreatment with seven filamentous fungi. • Metabolic heat yield coefficients (YQ/X) seem to indicate pretreatment success. • YQ/X values may support the selection of suitable fungal strains for pretreatment.
Collapse
Affiliation(s)
- Hieu Linh Duong
- Department of Applied Microbial Ecology, Helmholtz-Centre for Environmental Research-UFZ, Permoserstraβe 15, 04318, Leipzig, Germany
- Vietnamese-German University (VGU), Ring Road 4, Quarter 4, Thoi Hoa Ward, Ben Cat City, Binh Duong Province, Vietnam
| | - Sven Paufler
- Department of Applied Microbial Ecology, Helmholtz-Centre for Environmental Research-UFZ, Permoserstraβe 15, 04318, Leipzig, Germany
| | - Hauke Harms
- Department of Applied Microbial Ecology, Helmholtz-Centre for Environmental Research-UFZ, Permoserstraβe 15, 04318, Leipzig, Germany
| | - Thomas Maskow
- Department of Applied Microbial Ecology, Helmholtz-Centre for Environmental Research-UFZ, Permoserstraβe 15, 04318, Leipzig, Germany
| | - Dietmar Schlosser
- Department of Applied Microbial Ecology, Helmholtz-Centre for Environmental Research-UFZ, Permoserstraβe 15, 04318, Leipzig, Germany.
| |
Collapse
|
2
|
Fu Y, Sun H, Luo Y, Zhang W, Cai Z, Li Y, Luan L, Ning Q, Shi Q, Liang Y, Liang C, Tang C, Li Y, Zhang H, Xie Z, Chen L, Xu J, Kuzyakov Y. Deciphering Biotic and Abiotic Mechanisms Underlying Straw Decomposition and Soil Organic Carbon Priming in Agriculture Soils Receiving Long-Term Fertilizers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20549-20562. [PMID: 38099742 DOI: 10.1021/acs.jafc.3c03209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Straw-related carbon (C) dynamics are central for C accrual in agro-ecosystems and should be assessed by investigating their decomposition and soil organic carbon (SOC) priming effects. Our understanding of biotic and abiotic mechanisms underpinning these two C processes, however, is still not sufficiently profound. Soils that had received organic and mineral fertilizers for 26 years were sampled for a 28 day incubation experiment to assess 13C-labeled straw decomposition and SOC priming effects. On the basis of analyzing physicochemical properties, fungal taxonomic (MiSeq sequencing) and functional (metagenomics) guilds, we quantified the contributions of biotic and abiotic attributes to straw decomposition and SOC priming. Here, we propose two distinct mechanisms underlying straw decomposition and SOC priming in agriculture soils: (i) accelerated straw mineralization in manure-treated soils was mainly driven by biotic forces, while (ii) larger SOC priming in NPK-amended soils was through abiotic regulation.
Collapse
Affiliation(s)
- Yingyi Fu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Han Sun
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Yu Luo
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Wenjun Zhang
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agriculture Resources and Regional Planning, Chinese Academy of Agriculture Sciences, Beijing 100081, People's Republic of China
| | - Zejiang Cai
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agriculture Resources and Regional Planning, Chinese Academy of Agriculture Sciences, Beijing 100081, People's Republic of China
| | - Yongchun Li
- Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang 311300, People's Republic of China
| | - Lu Luan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
| | - Qi Ning
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
| | - Qianer Shi
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Yuting Liang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
| | - Chao Liang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, People's Republic of China
| | - Caixian Tang
- Department of Animal, Plant and Soil Sciences, Centre for AgriBioscience, La Trobe University, Melbourne Campus, Bundoora, Victoria 3086, Australia
| | - Yongfu Li
- Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang 311300, People's Republic of China
| | - Huimin Zhang
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agriculture Resources and Regional Planning, Chinese Academy of Agriculture Sciences, Beijing 100081, People's Republic of China
| | - Zubin Xie
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
| | - Lijun Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Göttingen, 37077 Göttingen, Germany
| |
Collapse
|
3
|
Shanthi Kumari BS, Kumar KD, Golla N, Krishna SBN, Geetha KS, Vyshnava SS, Reddy BR. Effect of lignocellulosic materials and chlorpyrifos pesticide on secretion of ligninolytic enzymes by the white rot fungus – Stereum ostrea. BIOREMEDIATION JOURNAL 2023; 27:147-157. [DOI: 10.1080/10889868.2022.2029823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Affiliation(s)
- B. S. Shanthi Kumari
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| | - Kanderi Dileep Kumar
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| | - Narasimha Golla
- Department of Virology, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
| | - Suresh Babu Naidu Krishna
- Department of Biomedical and Clinical Technology, Durban University of Technology, Durban, South Africa
| | - K. Sai Geetha
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| | | | - B. Rajasekhar Reddy
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| |
Collapse
|
4
|
Wang M, Qiao J, Sheng Y, Wei J, Cui H, Li X, Yue G. Bioconversion of corn fiber to bioethanol: Status and perspectives. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 157:256-268. [PMID: 36577277 DOI: 10.1016/j.wasman.2022.12.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/17/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Due to the rising demand for green energy, bioethanol has attracted increasing attention from academia and industry. Limited by the bottleneck of bioethanol yield in traditional corn starch dry milling processes, an increasing number of studies focus on fully utilizing all corn ingredients, especially kernel fiber, to further improve the bioethanol yield. This mini-review addresses the technological challenges and opportunities on the way to achieving the efficient conversion of corn fiber. Significant advances during the review period include the detailed characterization of different forms of corn kernel fiber and the development of off-line and in-situ conversion strategies. Lessons from cellulosic ethanol technologies offer new ways to utilize corn fiber in traditional processes. However, the commercialization of corn kernel fiber conversion may be hampered by enzyme cost, conversion efficiency, and overall process economics. Thus, future studies should address these technical limitations.
Collapse
Affiliation(s)
- Minghui Wang
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China
| | - Jie Qiao
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China
| | - Yijie Sheng
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China
| | - Junnan Wei
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China
| | - Haiyang Cui
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.
| | - Xiujuan Li
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China.
| | - Guojun Yue
- College of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210009, People's Republic of China; SDIC Biotech Investment Co., Ltd., Beijing 100034, China
| |
Collapse
|
5
|
Biovalorization of Grape Stalks as Animal Feed by Solid State Fermentation Using White-Rot Fungi. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136800] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
This work aimed to evaluate the potential of three fungi strains, Lentinula edodes, Pleurotus eryngii, and Pleurotus citrinopileatus, to degrade lignin and enhance the nutritive value of grape stalks (GS). The GS was inoculated with the fungi and incubated under solid-state fermentation at 28 °C and 85% relative humidity for 7, 14, 21, 28, 35, and 42 days, in an incubation chamber. The influence of the treatments was evaluated by analyzing the potential modifications in the chemical composition, in vitro organic matter digestibility (IVOMD) and enzymatic kinetics. An increase (p < 0.001) in the crude protein content was observed in the GS treated with L. edodes and P. citrinopileatus at 42 days of incubation (50 and 75%, respectively). The treatment performed with L. edodes decreased (p < 0.001) lignin content by 52%, and led to higher (p < 0.001) IVOMD values at 42 days of incubation. By contrast, P. eryngii did not affect lignin content and IVOMD. A higher activity of all enzymes was also detected for the treatment with L. edodes. Results indicated that L. edodes has a great potential to enhance the nutritive value of GS as an animal feed, due to its lignin degradation selectivity.
Collapse
|
6
|
Pinto PA, Bezerra RMF, Fraga I, Amaral C, Sampaio A, Dias AA. Solid-State Fermentation of Chestnut Shells and Effect of Explanatory Variables in Predictive Saccharification Models. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052572. [PMID: 35270265 PMCID: PMC8909322 DOI: 10.3390/ijerph19052572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 11/16/2022]
Abstract
In this study, chestnut shells (CNS), a recalcitrant and low-value agro-industrial waste obtained during the peeling of Castanea sativa fruits, were subjected to solid-state fermentation by six white-rot fungal strains (Irpex lacteus, Ganoderma resinaceum, Phlebia rufa, Bjerkandera adusta and two Trametes isolates). After being fermented, CNS was subjected to hydrolysis by a commercial enzymatic mix to evaluate the effect of fermentation in saccharification yield. After 48 h hydrolysis with 10 CMCase U mL−1 enzymatic mix, CNS fermented with both Trametes strains was recorded with higher saccharification yield (around 253 mg g−1 fermented CNS), representing 25% w/w increase in reducing sugars as compared to non-fermented controls. To clarify the relationships and general mechanisms of fungal fermentation and its impacts on substrate saccharification, the effects of some independent or explanatory variables in the production of reducing sugars were estimated by general predictive saccharification models. The variables considered were lignocellulolytic activities in fungal fermentation, CNS hydrolysis time, and concentration of enzymatic hydrolysis mix. Multiple linear regression analysis revealed a very high significant effect (p < 0.0001) of fungal laccase and xylanase activities in the saccharification models, thus proving the key potential of these enzymes in CNS solid-state fermentation.
Collapse
Affiliation(s)
- Paula A. Pinto
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
| | - Rui M. F. Bezerra
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Irene Fraga
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Carla Amaral
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Ana Sampaio
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Albino A. Dias
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
- Correspondence:
| |
Collapse
|
7
|
González-Rodríguez S, Lu-Chau TA, Trueba-Santiso A, Eibes G, Moreira MT. Bundling the removal of emerging contaminants with the production of ligninolytic enzymes from residual streams. Appl Microbiol Biotechnol 2022; 106:1299-1311. [PMID: 35075520 PMCID: PMC8816780 DOI: 10.1007/s00253-022-11776-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/09/2021] [Accepted: 01/09/2022] [Indexed: 12/20/2022]
Abstract
Abstract Enzymes offer interesting features as biological catalysts for industry: high specificity, activity under mild conditions, accessibility, and environmental friendliness. Being able to produce enzymes in large quantities and having them available in a stable and reusable form reduces the production costs of any enzyme-based process. Agricultural residues have recently demonstrated their potential as substrates to produce ligninolytic enzymes by different white rot fungi. In this study, the biotechnological production of a manganese peroxidase (MnP) by Irpex lacteus was conducted through solid-state fermentation (SSF) with wheat straw as substrate and submerged fermentation (SmF) employing wheat straw extract (WSE). The obtained enzyme cocktail also showed manganese-independent activity (MiP), related to the presence of a short MnP and a dye-decolorizing peroxidase (DyP) which was confirmed by shotgun proteomic analyses. In view of the enhanced production of ligninolytic enzymes in SmF, different parameters such as WSE concentration and nitrogen source were evaluated. The highest enzyme titers were obtained with a medium formulated with glucose and peptone (339 U/L MnP and 15 U/L MiP). The scale-up to a 30 L reactor achieved similar activities, demonstrating the feasibility of enzyme production from the residual substrate at different production scales. Degradation of five emerging pollutants was performed to demonstrate the high oxidative capacity of the enzyme. Complete removal of hormones and bisphenol A was achieved in less than 1 h, whereas almost 30% degradation of carbamazepine was achieved in 24 h, which is a significant improvement compared to previous enzymatic treatments of this compound. Key points • Wheat straw extract is suitable for the growth of I. lacteus. • The enzyme cocktail obtained allows the degradation of emerging contaminants. • Mn-dependent and Mn-independent activities increases the catalytic potential. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s00253-022-11776-7.
Collapse
|
8
|
Effect of alkali-treated birch sawdust on the lignocellulase secretion and exo-polysaccharide production by Inonotus obliquus under submerged fermentation and its lignocellulose degradation patterns. J Biosci Bioeng 2021; 133:33-38. [PMID: 34690061 DOI: 10.1016/j.jbiosc.2021.09.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/03/2021] [Accepted: 09/20/2021] [Indexed: 11/20/2022]
Abstract
The objectives of this study were to investigate the medicinal mushroom Inonotus obliquus on the production of polysaccharides and changes of extracellular lignocellulolytic enzymes during submerged fermentation using alkali-treated birch sawdust as substrate. Meanwhile, in order to explore the degradation mode of lignocellulose in alkali-treated birch sawdust, degradation analysis of three components of lignocellulose was carried out. The fungus process in alkali-treated birch sawdust medium resulted in a higher degradation rate of cellulose, hemicellulose, and lignin of 39.24%, 51.00% and 31.3% after 11 days of submerged fermentation by the mycelium of I. obliquus, respectively. Maximal polysaccharide production and α-glucosidase inhibition rate determined in the alkali-treated birch sawdust medium were 6.93 mg/mL and 55.80%, while they were 4.98 mg/mL and 27.89% in the control. Moreover, high activities of laccase (51.95 IU/mL), CMCase (1.35 IU/mL), filter paper activity (0.50 IU/mL) and β-glucosidase (0.55 IU/mL) were observed in alkali-treated birch sawdust medium, respectively. The results demonstrated that the addition of alkali-treated birch sawdust could promote the yield and α-glucosidase inhibition activity of polysaccharides and induce the production of cellulase and xylanase, indicating that alkali pretreatment was conducive to utilization of birch sawdust by I. obliquus.
Collapse
|
9
|
Terasawat A, Phoolphundh S. Simultaneous Biological Pretreatment and Saccharification of Rice Straw by Ligninolytic Enzymes from Panus neostrigosus I9 and Commercial Cellulase. J Fungi (Basel) 2021; 7:853. [PMID: 34682275 PMCID: PMC8537424 DOI: 10.3390/jof7100853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/05/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022] Open
Abstract
The utilization of rice straw for biofuel production is limited by its composition. The pretreatment process is required to improve the enzymatic accessibility of polysaccharides in the biomass prior to enzymatic saccharification. In this study, simultaneous biological pretreatment and saccharification (SPS) of rice straw starting from laccase production by Panus neostrigosus I9 was operated in a 2-L fermenter. It was found that fungal physiology was strongly influenced by the agitation, and that the highest laccase production was obtained at an agitation speed of 750 rpm (209.96 ± 0.34 U/L). The dilution rate of 0.05 h-1 was set in continuous fermentation which resulted in laccase activity of 678.49 ± 20.39 U/L, approximately three times higher than that in batch culture. Response surface methodology (RSM) was applied to achieve the condition for maximum percentage of delignification. The maximum percentage of delignification of 45.55% was accomplished after pretreatment of rice straw with laccase enzyme 39.40 U/g rice straw at 43.70 °C for 11.19 h. Reducing sugar of 3.85 ± 0.15 g/L was obtained from the digested rice straw in a SPS reactor, while non-pretreated rice straw gave only 1.13 ± 0.10 g/L within 12 h of incubation. The results indicated that simultaneous biological pretreatment and saccharification (SPS) of rice straw by laccase helped to improve the accessibility of cellulose by cellulolytic enzymes.
Collapse
Affiliation(s)
| | - Sivawan Phoolphundh
- Department of Microbiology, Faculty of Science, King Mongkut’s University of Technology Thonburi, 126 Pracha-Uthid Road, Bang Mod, Thungkru, Bangkok 10140, Thailand;
| |
Collapse
|
10
|
Yin X, Wei L, Pan X, Liu C, Jiang J, Wang K. The Pretreatment of Lignocelluloses With Green Solvent as Biorefinery Preprocess: A Minor Review. FRONTIERS IN PLANT SCIENCE 2021; 12:670061. [PMID: 34168668 PMCID: PMC8218942 DOI: 10.3389/fpls.2021.670061] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/06/2021] [Indexed: 06/02/2023]
Abstract
Converting agriculture and forestry lignocellulosic residues into high value-added liquid fuels (ethanol, butanol, etc.), chemicals (levulinic acid, furfural, etc.), and materials (aerogel, bioresin, etc.) via a bio-refinery process is an important way to utilize biomass energy resources. However, because of the dense and complex supermolecular structure of lignocelluloses, it is difficult for enzymes and chemical reagents to efficiently depolymerize lignocelluloses. Strikingly, the compact structure of lignocelluloses could be effectively decomposed with a proper pretreatment technology, followed by efficient separation of cellulose, hemicellulose and lignin, which improves the conversion and utilization efficiency of lignocelluloses. Based on a review of traditional pretreatment methods, this study focuses on the discussion of pretreatment process with recyclable and non-toxic/low-toxic green solvents, such as polar aprotic solvents, ionic liquids, and deep eutectic solvents, and provides an outlook of the industrial application prospects of solvent pretreatment.
Collapse
Affiliation(s)
- Xiaoyan Yin
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
| | - Linshan Wei
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
| | - Xueyuan Pan
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
| | - Chao Liu
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
| | - Jianchun Jiang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
- National Engineering Laboratory for Biomass Chemical Utilization, Nanjing, China
| | - Kui Wang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China
- National Engineering Laboratory for Biomass Chemical Utilization, Nanjing, China
| |
Collapse
|
11
|
Villa Gomez DK, Becerra Castañeda P, Montoya Rosales JDJ, González Rodríguez LM. Anaerobic digestion of bean straw applying a fungal pre-treatment and using cow manure as co-substrate. ENVIRONMENTAL TECHNOLOGY 2020; 41:2863-2874. [PMID: 30811276 DOI: 10.1080/09593330.2019.1587004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
The significant amounts of agriculture residues such as bean straw (BS) in rural areas, advises its valorisation for energy recovery. The feasibility of using BS for biogas production through anaerobic digestion was assessed. Prior to this, a fungal pre-treatment to hydrolyse BS with Pleutorus ostreatus was studied at 30°C and 100 rpm in orbital incubators with 1, 10 and 30 mg fungus/g straw for 14, 21 and 28 days. Then, anaerobic digestion experiments were performed in batch with cow manure (CM) as co-substrate and pre-treated BS at ratios (g/g total solids) of 1/2, 1/3, 1/5 and 0/1. Maximum lignin (18%) and hemicellulose (44%) degradation occurred at 30 mg fungus/g straw and 28 days, along with the highest total methane yield (38 mL CH4/g VS loaded). The total amount of methane decreased when increasing CM in the experiments (701.4-191.5 mL CH4), suggesting inhibition owed to a component of CM. Self-sustained biogas production of BS occurred due to the presence of bacteria (i.e. Bacilli and Bacteroidia) and archea (i.e. Methanobacteria and Methanomicrobia). However, the usage of a full-active inoculum should be studied for higher biogas production rates.
Collapse
Affiliation(s)
| | - Patricia Becerra Castañeda
- Unidad Profesional Interdisciplinaria De Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Zacatecas, México
| | - Jose de Jesus Montoya Rosales
- Unidad Profesional Interdisciplinaria De Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Zacatecas, México
| | - Luis Mario González Rodríguez
- Unidad Profesional Interdisciplinaria De Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Zacatecas, México
| |
Collapse
|
12
|
Degradative Ability of Mushrooms Cultivated on Corn Silage Digestate. Molecules 2020; 25:molecules25133020. [PMID: 32630357 PMCID: PMC7412174 DOI: 10.3390/molecules25133020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 11/16/2022] Open
Abstract
The current management practice of digestate from biogas plants involves its use for land application as a fertilizer. Nevertheless, the inadequate handling of digestate may cause environmental risks due to losses of ammonia, methane and nitrous oxide. Therefore, the key goals of digestate management are to maximize its value by developing new digestate products, reducing its dependency on soil application and the consequent air pollution. The high nitrogen and lignin content in solid digestate make it a suitable substrate for edible and medicinal mushroom cultivation. To this aim, the mycelial growth rate and degradation capacity of the lignocellulosic component from corn silage digestate, undigested wheat straw and their mixture were investigated on Cyclocybe aegerita, Coprinus comatus, Morchella importuna, Pleurotus cornucopiae and Pleurotus ostreatus. The structural modification of the substrates was performed by using attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. Preliminary in vitro results demonstrated the ability of P. ostreatus, P. cornucopiae and M. importuna to grow and decay hemicellulose and lignin of digestate. Cultivation trials were carried out on C. aegerita, P. cornucopiae and P. ostreatus. Pleurotus ostreatus showed the highest biological efficiency and fruiting body production in the presence of the digestate; moreover, P. ostreatus and P. cornucopiae were able to degrade the lignin. These results provide attractive perspectives both for more sustainable digestate management and for the improvement of mushroom cultivation efficiency.
Collapse
|
13
|
Liew YX, Chan YJ, Manickam S, Chong MF, Chong S, Tiong TJ, Lim JW, Pan GT. Enzymatic pretreatment to enhance anaerobic bioconversion of high strength wastewater to biogas: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 713:136373. [PMID: 31954239 DOI: 10.1016/j.scitotenv.2019.136373] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/24/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
Oil and grease, carbohydrate, protein, and lignin are the main constituents of high strength wastewaters such as dairy wastewater, cheese whey wastewater, distillery wastewater, pulp and paper mill wastewater, and slaughterhouse wastewaters. These constituents have contributed to various operational problems faced by the high-rate anaerobic bioreactor (HRAB). During the hydrolysis stage of anaerobic digestion (AD), these constituents can be hydrolyzed. Since hydrolysis is known to be the rate-limiting step of AD, the overall AD can be enhanced by improving the hydrolysis stage. This can be done by introducing pretreatment that targets the degradation of these constituents. This review mainly focuses on the biological pretreatment on various high-strength wastewaters by using different types of enzymes namely lipase, amylase, protease, and ligninolytic enzymes which are responsible for catalyzing the degradation of oil and grease, carbohydrate, protein, and lignin respectively. This review provides a summary of enzymatic systems involved in enhancing the hydrolysis stage and consequently improve biogas production. The results show that the use of enzymes improves the biogas production in the range of 7 to 76%. Though these improvements are highly dependent on the operating conditions of pretreatment and the types of substrates. Therefore, the critical parameters that would affect the effectiveness of pretreatment are also discussed. This review paper will serve as a useful piece of information to those industries that face difficulties in treating their high-strength wastewaters for the appropriate process, equipment selection, and design of an anaerobic enzymatic system. However, more intensive studies on the optimum operating conditions of pretreatment in a larger-scale and synergistic effects between enzymes are necessary to make the enzymatic pretreatment economically feasible.
Collapse
Affiliation(s)
- Yuh Xiu Liew
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Selangor Darul Ehsan, Malaysia
| | - Yi Jing Chan
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Selangor Darul Ehsan, Malaysia.
| | - Sivakumar Manickam
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Selangor Darul Ehsan, Malaysia.
| | - Mei Fong Chong
- 28, Jalan Pulau Tioman U10/94, Taman Greenhill, Shah Alam 40170, Selangor Darul Ehsan, Malaysia
| | - Siewhui Chong
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Selangor Darul Ehsan, Malaysia.
| | - Timm Joyce Tiong
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Selangor Darul Ehsan, Malaysia.
| | - Jun Wei Lim
- Department of Fundamental and Applied Sciences, Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia.
| | - Guan-Ting Pan
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao E Rd, Da'an District, 106 Taipei City, Taiwan, ROC.
| |
Collapse
|
14
|
Surendran A, Siddiqui Y, Saud H, Ali N, Manickam S. Inhibition and kinetic studies of lignin degrading enzymes ofGanoderma boninenseby naturally occurring phenolic compounds. J Appl Microbiol 2018; 125:876-887. [DOI: 10.1111/jam.13922] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/29/2018] [Accepted: 05/15/2018] [Indexed: 11/30/2022]
Affiliation(s)
- A. Surendran
- The Laboratory of Climate-Smart Food Crop Production; Institute of Tropical Agriculture and Food Security; University of Putra Malaysia; Serdang Malaysia
| | - Y. Siddiqui
- The Laboratory of Plant Science and Technology; Institute of Plantation Studies; University of Putra Malaysia; Serdang Malaysia
| | - H.M. Saud
- Department of Agriculture Technology; Faculty of Agriculture; University of Putra Malaysia; Serdang Selangor Malaysia
| | - N.S. Ali
- Department of Plant Protection; Faculty of Agriculture; University of Putra Malaysia; Serdang Selangor Malaysia
| | - S. Manickam
- Department of Chemical and Environmental Engineering; University of Nottingham Malaysia Campus; Semenyih Selangor Malaysia
| |
Collapse
|
15
|
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]
|
16
|
Paramjeet S, Manasa P, Korrapati N. Biofuels: Production of fungal-mediated ligninolytic enzymes and the modes of bioprocesses utilizing agro-based residues. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
17
|
Bilal M, Iqbal HM, Hu H, Wang W, Zhang X. Metabolic engineering and enzyme-mediated processing: A biotechnological venture towards biofuel production – A review. RENEWABLE & SUSTAINABLE ENERGY REVIEWS 2018. [DOI: 10.1016/j.rser.2017.09.070] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
18
|
Role of Fungi in Biorefinery: A Perspective. Fungal Biol 2018. [DOI: 10.1007/978-3-319-90379-8_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
19
|
Ćilerdžić J, Galić M, Vukojević J, Brčeski I, Stajić M. Potential of selected fungal species to degrade wheat straw, the most abundant plant raw material in Europe. BMC PLANT BIOLOGY 2017; 17:249. [PMID: 29297329 PMCID: PMC5751771 DOI: 10.1186/s12870-017-1196-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
BACKGROUND Structural component of plant biomass, lignocellulose, is the most abundant renewable resource in nature. Lignin is the most recalcitrant natural aromatic polymer and its degradation presents great challenge. Nowadays, the special attention is given to biological delignification, the process where white-rot fungi take the crucial place owing to strong ligninolytic enzyme system. However, fungal species, even strains, differ in potential to produce high active ligninolytic enzymes and consequently to delignify plant biomass. Therefore, the goals of the study were characterization of Mn-oxidizing peroxidases and laccases of numerous mushrooms as well as determination of their potential to delignify wheat straw, the plant raw material that, according to annual yield, takes the first place in Europe and the second one in the world. RESULTS During wheat straw fermentation, Lentinus edodes HAI 858 produced the most active Mn-dependent and Mn-independent peroxidases (1443.2 U L-1 and 1045.5 U L-1, respectively), while Pleurotus eryngii HAI 711 was the best laccase producer (7804.3 U L-1). Visualized bends on zymogram confirmed these activities and demonstrated that laccases were the dominant ligninolytic enzymes in the studied species. Ganoderma lucidum BEOFB 435 showed considerable ability to degrade lignin (58.5%) and especially hemicellulose (74.8%), while the cellulose remained almost intact (0.7%). Remarkable selectivity in lignocellulose degradation was also noted in Pleurotus pulmonarius HAI 573 where degraded amounts of lignin, hemicellulose and cellulose were in ratio of 50.4%:15.3%:3.8%. CONCLUSIONS According to the presented results, it can be concluded that white-rot fungi, due to ligninolytic enzymes features and degradation potential, could be important participants in various biotechnological processes including biotransformation of lignocellulose residues/wastes in food, feed, paper and biofuels.
Collapse
Affiliation(s)
- Jasmina Ćilerdžić
- University of Belgrade, Faculty of Biology, Takovska 43, Belgrade, 11000, Serbia
| | - Milica Galić
- University of Belgrade, Faculty of Biology, Takovska 43, Belgrade, 11000, Serbia
| | - Jelena Vukojević
- University of Belgrade, Faculty of Biology, Takovska 43, Belgrade, 11000, Serbia
| | - Ilija Brčeski
- University of Belgrade, Faculty of Biology, Takovska 43, Belgrade, 11000, Serbia
| | - Mirjana Stajić
- University of Belgrade, Faculty of Biology, Takovska 43, Belgrade, 11000, Serbia.
| |
Collapse
|
20
|
Endophytic Fungi as Pretreatment to Enhance Enzymatic Hydrolysis of Olive Tree Pruning. BIOMED RESEARCH INTERNATIONAL 2017; 2017:9727581. [PMID: 29250553 PMCID: PMC5698607 DOI: 10.1155/2017/9727581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/28/2017] [Accepted: 10/18/2017] [Indexed: 11/17/2022]
Abstract
Olive tree pruning, as one of the most abundant lignocellulosic residues in Mediterranean countries, has been evaluated as a source of sugars for fuel and chemicals production. A mild acid pretreatment has been combined with a fungal pretreatment using either two endophytes (Ulocladium sp. and Hormonema sp.) or a saprophyte (Trametes sp. I-62). The use of endophytes is based on the important role that some of them play during the initial stages of wood decomposition. Without acid treatment, fungal pretreatment with Ulocladium sp. provided a nonsignificant enhancement of 4.6% in glucose digestibility, compared to control. When a mild acid hydrolysis was carried out after fungal pretreatments, significant increases in glucose digestibility from 4.9% to 12.0% (compared to control without fungi) were observed for all fungal pretreatments, with maximum values yielded by Hormonema sp. However, despite the observed digestibility boost, the total sugar yields (taking into account solid yield) were not significantly increased by the pretreatments. Nevertheless, based on these preliminary improvements in digestibility, this work proves the potential of endophytic fungi to boost the production of sugar from olive tree pruning, which would add an extra value to the bioeconomy of olive crops.
Collapse
|
21
|
Hermosilla E, Schalchli H, Mutis A, Diez MC. Combined effect of enzyme inducers and nitrate on selective lignin degradation in wheat straw by Ganoderma lobatum. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:21984-21996. [PMID: 28785941 DOI: 10.1007/s11356-017-9841-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 07/27/2017] [Indexed: 06/07/2023]
Abstract
Lignin is one of the main barriers to obtaining added-value products from cellulosic fraction of lignocellulosic biomass due to its random aromatic structure and strong association with cellulose and hemicellulose. Inorganic and organic compounds have been used as enzyme inducers to increase the ligninolytic potential of white-rot fungi, without considering their effect on the selectivity of degradation. In this study, the selective lignin degradation in wheat straw by Ganoderma lobatum was optimized using a central composite design to evaluate the combined effect of Fe2+ and Mn2+ as inducers of ligninolytic enzymes and NO3- as an additional nitrogen source. Selective lignin degradation was promoted to maximize lignin degradation and minimize weight losses. The optimal conditions were 0.18 M NO3-, 0.73 mM Fe2+, and 1 mM Mn2+, which resulted in 50.0% lignin degradation and 18.5% weight loss after 40 days of fungal treatment. A decrease in absorbance at 1505 and 900 cm-1 in fungal-treated samples was observed in the FTIR spectra, indicating lignin and cellulose degradation in fungal-treated wheat straw, respectively. The main ligninolytic enzymes detected during lignin degradation were manganese-dependent and manganese-independent peroxidases. Additionally, confocal laser scanning microscopy revealed that lignin degradation in wheat straw by G. lobatum resulted in higher cellulose accessibility. We concluded that the addition of enzyme inducers and NO3- promotes selective lignin degradation in wheat straw by G. lobatum.
Collapse
Affiliation(s)
- Edward Hermosilla
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
- Doctoral Program in Sciences of Natural Resources, Universidad de La Frontera, Temuco, Chile
| | - Heidi Schalchli
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
- Chemical Engineering Department, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile
| | - Ana Mutis
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
- Chemical Science and Natural Resource Department, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile
| | - María Cristina Diez
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile.
- Chemical Engineering Department, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
| |
Collapse
|
22
|
Musatti A, Ficara E, Mapelli C, Sambusiti C, Rollini M. Use of solid digestate for lignocellulolytic enzymes production through submerged fungal fermentation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 199:1-6. [PMID: 28521209 DOI: 10.1016/j.jenvman.2017.05.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 04/18/2017] [Accepted: 05/07/2017] [Indexed: 06/07/2023]
Abstract
Studies were performed on the use of the solid fraction of digestate (D) for the production of lignocellulolytic enzymes (endo- and exo-glucanase, xylanase, β-glucosidase and laccase) by fungi, in comparison with wheat straw (benchmark) (W). To date, this is the first report on the use of such an inexpensive substrate in a liquid environment. Submerged instead of solid state fermentation was applied to overcome pH inhibition and increase surface accessibility. A total of 21 fungal strains were tested: the most performing ones were Irpex lacteus DSM1183 for both β-glucosidase (52 IU/g with D, + 400% compared to W) and endo-glucanase (236 IU/g with D, + 470% compared to W), Schizophyllum commune CBS30132 for xylanase (715 IU/g with W, + 145% compared to D) and Pleurotus ostreatus ATCC96997 for laccase (124 IU/g with D, +230% compared to D). Cultures from S. commune and P. ostreatus were analyzed at the beginning and at the end of the growth test to determine soluble COD, total (TS) and volatile (VS) solids. COD was always lower at the end of the test suggesting a faster uptake than hydrolysis. P. ostreatus evidenced a higher VS reduction (-11% rather than -32%), suggesting a more effective growth of this strain on D. Results may open up new avenues for the utilization of solid digestate, an inexpensive agricultural by-product, for the production of value-added products as well as to increase biodegradation of lignocellulosic materials.
Collapse
Affiliation(s)
- Alida Musatti
- Università degli Studi di Milano, DEFENS, Section of Food Microbiology and Bioprocessing, Via G. Celoria 2, 20133, Milano, Italy
| | - Elena Ficara
- Politecnico di Milano, DICA, Environmental Section, Piazza L. da Vinci, 32, 20133, Milano, Italy
| | - Chiara Mapelli
- Università degli Studi di Milano, DEFENS, Section of Food Microbiology and Bioprocessing, Via G. Celoria 2, 20133, Milano, Italy
| | - Cecilia Sambusiti
- IATE, CIRAD, INRA, Montpellier SupAgro, Université de Montpellier, 34060, Montpellier, France
| | - Manuela Rollini
- Università degli Studi di Milano, DEFENS, Section of Food Microbiology and Bioprocessing, Via G. Celoria 2, 20133, Milano, Italy.
| |
Collapse
|
23
|
Bilal M, Asgher M, Iqbal HMN, Hu H, Zhang X. Biotransformation of lignocellulosic materials into value-added products-A review. Int J Biol Macromol 2017; 98:447-458. [PMID: 28163129 DOI: 10.1016/j.ijbiomac.2017.01.133] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 01/25/2017] [Accepted: 01/31/2017] [Indexed: 02/08/2023]
Abstract
In the past decade, with the key biotechnological advancements, lignocellulosic materials have gained a particular importance. In serious consideration of global economic, environmental and energy issues, research scientists have been re-directing their interests in (re)-valorizing naturally occurring lignocellulosic-based materials. In this context, lignin-modifying enzymes (LMEs) have gained considerable attention in numerous industrial and biotechnological processes. However, their lower catalytic efficiencies and operational stabilities limit their practical and multipurpose applications in various sectors. Therefore, to expand the range of natural industrial biocatalysts e.g. LMEs, significant progress related to the enzyme biotechnology has appeared. Owing to the abundant lignocellulose availability along with LMEs in combination with the scientific advances in the biotechnological era, solid-phase biocatalysts can be economically tailored on a large scale. This review article outlines first briefly on the lignocellulose materials as a potential source for biotransformation into value-added products including composites, fine chemicals, nutraceutical, delignification, and enzymes. Comprehensive information is also given on the purification and characterization of LMEs to present their potential for the industrial and biotechnological sector.
Collapse
Affiliation(s)
- Muhammad Bilal
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Muhammad Asgher
- Industrial Biotechnology Laboratory, Department of Biochemistry, University of Agriculture Faisalabad, Pakistan
| | - Hafiz M N Iqbal
- School of Engineering and Science, Tecnologico de Monterrey, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., CP 64849, Mexico.
| | - Hongbo Hu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xuehong Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| |
Collapse
|
24
|
Kumar R, Sharma RK, Singh AP. Cellulose based grafted biosorbents - Journey from lignocellulose biomass to toxic metal ions sorption applications - A review. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.050] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
25
|
Capolupo L, Faraco V. Green methods of lignocellulose pretreatment for biorefinery development. Appl Microbiol Biotechnol 2016; 100:9451-9467. [PMID: 27714444 PMCID: PMC5071362 DOI: 10.1007/s00253-016-7884-y] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/19/2016] [Accepted: 09/22/2016] [Indexed: 11/01/2022]
Abstract
Lignocellulosic biomass is the most abundant, low-cost, bio-renewable resource that holds enormous importance as alternative source for production of biofuels and other biochemicals that can be utilized as building blocks for production of new materials. Enzymatic hydrolysis is an essential step involved in the bioconversion of lignocellulose to produce fermentable monosaccharides. However, to allow the enzymatic hydrolysis, a pretreatment step is needed in order to remove the lignin barrier and break down the crystalline structure of cellulose. The present manuscript is dedicated to reviewing the most commonly applied "green" pretreatment processes used in bioconversion of lignocellulosic biomasses within the "biorefinery" concept. In this frame, the effects of different pretreatment methods on lignocellulosic biomass are described along with an in-depth discussion on the benefits and drawbacks of each method, including generation of potentially inhibitory compounds for enzymatic hydrolysis, effect on cellulose digestibility, and generation of compounds toxic for the environment, and energy and economic demand.
Collapse
Affiliation(s)
- Laura Capolupo
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, via Cintia, 4, 80126, Naples, Italy
| | - Vincenza Faraco
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, via Cintia, 4, 80126, Naples, Italy.
- European Center "Europe Direct LUP", Complesso Universitario Monte S. Angelo, via Cintia, 4, 80126, Naples, Italy.
- Interdepartmental Center "R. d'Ambrosio, LUPT", Complesso Universitario Monte S. Angelo, via Cintia, 4, 80126, Naples, Italy.
| |
Collapse
|
26
|
Stajić M, Vukojević J, Milovanović I, Ćilerdžić J, Knežević A. Role of Mushroom Mn-Oxidizing Peroxidases in Biomass Conversion. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/978-3-319-43679-1_10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
|
27
|
Kumari S, Das D. Biologically pretreated sugarcane top as a potential raw material for the enhancement of gaseous energy recovery by two stage biohythane process. BIORESOURCE TECHNOLOGY 2016; 218:1090-1097. [PMID: 27469089 DOI: 10.1016/j.biortech.2016.07.070] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 07/16/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
The aim of the present study was to develop a suitable pretreatment method to enhance the microbial degradation of lignocellulosic biomass and to maximize the overall energy recovery by using biohythane process. An efficient and eco-friendly biological pretreatment was used. Maximum lignin removal using biological pretreatment of sugarcane top was 60.4% w/w after 21d incubation at 28°C in static condition. Confocal microscopy observation and FTIR analysis confirmed the removal of lignin from sugarcane top. The maximum hydrogen production rate (Rm), hydrogen production potential (P) and lag time (λ) using pretreated sugarcane top were 16.76mL/g-VS/h, 87.40mL/g-VS and 3.38h respectively. The maximum methane production potential using spent medium of dark fermentation was 180.86mL/g-VS with the lag time of 2.9d. The overall gaseous energy recovery was 37.7% which is 54% higher than that of the untreated one.
Collapse
Affiliation(s)
- Sinu Kumari
- Advanced Technology Development Center, Indian Institute of Technology, Kharagpur 721302, India
| | - Debabrata Das
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India.
| |
Collapse
|
28
|
Ren NQ, Zhao L, Chen C, Guo WQ, Cao GL. A review on bioconversion of lignocellulosic biomass to H2: Key challenges and new insights. BIORESOURCE TECHNOLOGY 2016; 215:92-99. [PMID: 27090403 DOI: 10.1016/j.biortech.2016.03.124] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 06/05/2023]
Abstract
With the increasing energy crisis and rising concern over climate change, the development of clean alternative energy sources is of great importance. Biohydrogen produced from lignocellulosic biomass is a promising candidate, because of its positives such as readily available, no harmful emissions, environment friendly, efficient, and renewable. However, obstacles still exist to enable the commercialization of biological hydrogen production from lignocellulosic biomass. Thus the objective of this work is to provide update information about the recent progress on lignocellulosic hydrogen conversion via dark fermentation. In this review, the most important technologies associated with lignocellulosic hydrogen fermentation were covered. Firstly, pretreatment methods for better utilization of lignocellulosic biomass are presented, at the same time, hydrolysis methods assisting to achieve efficient hydrogen fermentation were discussed. Afterwards, issues related to bioprocesses for hydrogen production purposes were presented. Additionally, the paper gave challenges and new insights of lignocellulosic biohydrogen production.
Collapse
Affiliation(s)
- Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Lei Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wan-Qian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Guang-Li Cao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Life Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| |
Collapse
|
29
|
Gamma irradiation assisted fungal degradation of the polypropylene/biomass composites. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2016.04.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
30
|
Knežević A, Stajić M, Jovanović VM, Kovačević V, Ćilerdžić J, Milovanović I, Vukojević J. Induction of wheat straw delignification by Trametes species. Sci Rep 2016; 6:26529. [PMID: 27216645 PMCID: PMC4877921 DOI: 10.1038/srep26529] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/28/2016] [Indexed: 01/26/2023] Open
Abstract
Wheat straw is the major crop residue in European countries which makes it the most promising material for bioconversion into biofuels. However, cellulose and hemicellulose are protected with lignin, so delignification is an inevitable phase in lignocellulose processing. The organisms predominantly responsible for its degradation are white-rot fungi and among them Trametes species represent promising degraders due to a well-developed ligninolytic enzyme system. Although numerous studies have confirmed that low molecular weight compounds can induce the production and activity of ligninolytic enzymes it is not clear how this reflects on the extent of delignification. The aim of the study was to assess the capacity of p-anisidine and veratryl alcohol to induce the production and activity of Mn-oxidizing peroxidases and laccases, and wheat straw delignification by six Trametes species. Significant inter- and intraspecific variations in activity and features of these enzymes were found, as well as differences in the potential of lignocellulose degradation in the presence or absence of inducers. Differences in the catalytic properties of synthesized enzyme isoforms strongly affected lignin degradation. Apart from enhanced lignin degradation, the addition of p-anisidine could significantly improve the selectivity of wheat straw ligninolysis, which was especially evident for T. hirsuta strains.
Collapse
Affiliation(s)
- Aleksandar Knežević
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| | - Mirjana Stajić
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| | - Vladimir M. Jovanović
- University of Belgrade, Institute for Biological Research “Siniša Stanković” Bulevar Despota Stefana 142, 11060 Belgrade, Serbia
| | - Višnja Kovačević
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| | - Jasmina Ćilerdžić
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| | - Ivan Milovanović
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| | - Jelena Vukojević
- University of Belgrade, Faculty of Biology, Takovska 43, 11000 Belgrade, Serbia
| |
Collapse
|
31
|
Mukherjee A, Mandal T, Ganguly A, Chatterjee PK. Lignin Degradation in the Production of Bioethanol - A Review. CHEMBIOENG REVIEWS 2016. [DOI: 10.1002/cben.201500016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
32
|
Baltierra-Trejo E, Silva-Espino E, Márquez-Benavides L, Sánchez-Yáñez JM. Inducción de la degradación de lignina de paja de trigo en aromáticos por Aspergillus spp. y Penicillium chrysogenum. JOURNAL OF THE SELVA ANDINA RESEARCH SOCIETY 2016. [DOI: 10.36610/j.jsars.2016.070100010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
33
|
Zhong C, Wang C, Wang F, Jia H, Wei P, Zhao Y. Enhanced biogas production from wheat straw with the application of synergistic microbial consortium pretreatment. RSC Adv 2016. [DOI: 10.1039/c5ra27393e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pretreatment of lignocellulosic biomass by using synergistic microbial consortium is an efficient way to promote biomass utilization efficiency.
Collapse
Affiliation(s)
- Chao Zhong
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211800
- P. R. China
| | - Chunming Wang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211800
- P. R. China
| | - Fengxue Wang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211800
- P. R. China
| | - Honghua Jia
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211800
- P. R. China
| | - Ping Wei
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211800
- P. R. China
| | - Yin Zhao
- Henan Tianguan Group Co. Ltd
- Nanyang 473000
- P. R. China
| |
Collapse
|
34
|
Martín-Sampedro R, Fillat Ú, Ibarra D, Eugenio ME. Use of new endophytic fungi as pretreatment to enhance enzymatic saccharification of Eucalyptus globulus. BIORESOURCE TECHNOLOGY 2015; 196:383-390. [PMID: 26255602 DOI: 10.1016/j.biortech.2015.07.088] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/20/2015] [Accepted: 07/23/2015] [Indexed: 06/04/2023]
Abstract
New endophytic fungi are assessed for the first time as pretreatment to enhance saccharification of Eucalyptus globulus wood. The fungi are all laccase-producing ascomycetes and were isolated from eucalyptus trees in Spain. After five endophytes had been assayed alone or in combination with white-rot fungus Trametes sp. I-62, three were pre-selected. To improve sugar production, an autohydrolysis pretreatment was performed before or after fungal treatment. Pretreatment increased sugar production 2.7 times compared to non-pretreated wood. When fungal and autohydrolysis pretreatments were combined, a synergistic increase in saccharification was observed in all cases. Endophytic fungi Ulocladium sp. and Hormonema sp. produced greater enhancements in saccharification than Trametes sp. I-62 (increase in sugar yields of 8.5, 8.0 and 6.0 times, respectively), demonstrating the high potential of these new endophytic fungi for saccharification enhancement.
Collapse
Affiliation(s)
- Raquel Martín-Sampedro
- INIA - CIFOR, Forestry Products Department, Cellulose and Paper Laboratories, Ctra. de La Coruña km 7.5, 28040 Madrid, Spain.
| | - Úrsula Fillat
- INIA - CIFOR, Forestry Products Department, Cellulose and Paper Laboratories, Ctra. de La Coruña km 7.5, 28040 Madrid, Spain
| | - David Ibarra
- INIA - CIFOR, Forestry Products Department, Cellulose and Paper Laboratories, Ctra. de La Coruña km 7.5, 28040 Madrid, Spain
| | - María E Eugenio
- INIA - CIFOR, Forestry Products Department, Cellulose and Paper Laboratories, Ctra. de La Coruña km 7.5, 28040 Madrid, Spain
| |
Collapse
|
35
|
Baltierra-Trejo E, Sánchez-Yáñez JM, Buenrostro-Delgado O, Márquez-Benavides L. Production of short-chain fatty acids from the biodegradation of wheat straw lignin by Aspergillus fumigatus. BIORESOURCE TECHNOLOGY 2015; 196:418-425. [PMID: 26263005 DOI: 10.1016/j.biortech.2015.07.105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 06/04/2023]
Abstract
The wheat straw lignin-rich fraction (WSLig-RF) can be used as a raw material for the production of metabolites for industrial use if ligninolytic mitosporic fungi are used for its biodegradation into aromatics and short-chain fatty acids (SCFAs, i.e., SCFA2-6). Although methods for the production of SCFA2-6 have been described previously, quantitative data of SCFA2-6 production have not been reported. The objectives of this study were to investigate the biodegradation of different concentrations of WSLig-RF by Aspergillus fumigatus and to identify whether SCFA2-6 production was dependent on the concentration of aromatics. A. fumigatus generated 2805mgL(-1) acetic acid when mixed with WSLig-RF at a concentration of 20gL(-1). Thus, aromatics are a substrate for the biosynthesis of SCFA2-6, and their production depends on the concentration of WSLig-RF aromatics.
Collapse
Affiliation(s)
- Eduardo Baltierra-Trejo
- Solid Waste and Energy Efficiency Research Group IIAF - Universidad Michoacana de San Nicolás de Hidalgo, 58302 Morelia, Mexico; Environmental Microbiology Research Group IIQB - Universidad Michoacana de San Nicolás de Hidalgo, 58040 Morelia, Mexico
| | - Juan Manuel Sánchez-Yáñez
- Environmental Microbiology Research Group IIQB - Universidad Michoacana de San Nicolás de Hidalgo, 58040 Morelia, Mexico
| | - Otoniel Buenrostro-Delgado
- Solid Waste and Energy Efficiency Research Group IIAF - Universidad Michoacana de San Nicolás de Hidalgo, 58302 Morelia, Mexico
| | - Liliana Márquez-Benavides
- Solid Waste and Energy Efficiency Research Group IIAF - Universidad Michoacana de San Nicolás de Hidalgo, 58302 Morelia, Mexico; Mexican Society of Science and Technology Applied to Solid Waste, Av. Cuauhtémoc 403, Col. Roma Norte, Delegación Cuauhtémoc, D.F., C.P. 06700, Mexico.
| |
Collapse
|
36
|
Pedri ZC, Lozano LMS, Hermann KL, Helm CV, Peralta RM, Tavares LBB. Influence of nitrogen sources on the enzymatic activity and grown by Lentinula edodes in biomass Eucalyptus benthamii. BRAZ J BIOL 2015; 75:940-7. [PMID: 26675911 DOI: 10.1590/1519-6984.03214] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 03/27/2014] [Indexed: 11/22/2022] Open
Abstract
Lignocellulose is the most abundant environmental component and a renewable organic resource in soil. There are some filamentous fungi which developed the ability to break down and use cellulose, hemicellulose and lignin as an energy source. The objective of this research was to analyze the effect of three nitrogen resources (ammonium sulfate, saltpetre, soybean) in the holocellulolitic activity of Lentinula edodes EF 50 using as substrate sawdust E. benthamii. An experimental design mixture was applied with repetition in the central point consisting of seven treatments (T) of equal concentrations of nitrogen in ammonium sulfate, potassium nitrate and soybean. The enzymatic activity of avicelase, carboxymetilcellulase, β-glucosidase, xylanases and manganese peroxidase was determined. The humidity, pH, water activity (aw) and qualitative analysis of mycelial growth in 8 times of cultivation were evaluated. The results showed negative effect on enzyme production in treatments with maximum concentration of ammonium sulfate and potassium nitrate. The treatments with cooked soybean flour expressed higher enzymatic activities in times of 3, 6 and 9 days of culture, except in the activity of manganese peroxidase. The highest production was observed in the treatment with ammonium sulfate, and soybean (83.86 UI.L-1) at 20 days of cultivation.
Collapse
Affiliation(s)
- Z C Pedri
- Programa de Pós-graduação, Universidade Regional de Blumenau, Blumenau, SC, Brazil
| | - L M S Lozano
- Departamento de Engenharia Química, Universidade Regional de Blumenau, Blumenau, SC, Brazil
| | - K L Hermann
- Programa de Pós-graduação em Engenharia Ambiental, Universidade Regional de Blumenau, Blumenau, SC, Brazil
| | - C V Helm
- Empresa Brasileira de Pesquisa Agropecuária, Colombo, PR, Brazil
| | - R M Peralta
- Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - L B B Tavares
- Universidade Regional de Blumenau, Blumenau, SC, Brazil
| |
Collapse
|
37
|
Baltierra-Trejo E, Márquez-Benavides L, Sánchez-Yáñez JM. Inconsistencies and ambiguities in calculating enzyme activity: The case of laccase. J Microbiol Methods 2015; 119:126-31. [PMID: 26459230 DOI: 10.1016/j.mimet.2015.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 10/08/2015] [Accepted: 10/08/2015] [Indexed: 10/22/2022]
Abstract
Laccase is a key enzyme in the degradation of lignin by fungi. Reports indicate that the activity of this enzyme ranges from 3.5 to 484,000 U L(-1). Our aim was to analyze how laccase activity is calculated in the literature, and to determine statistically whether variations in activity are due to biological properties or to inconsistencies in calculation. We found a general lack of consensus on the definition of enzyme activity, and enzymes are sometimes characterized in terms of reaction rate and specific activity. Moreover, enzyme activity is calculated using at least seven different equations. Therefore, it is critical to standardize the calculation of laccase activity in order to compare results directly.
Collapse
Affiliation(s)
- Eduardo Baltierra-Trejo
- Solid Waste Research Group IIAF-Universidad Michoacana de San Nicolás de Hidalgo, 58302 Morelia-México; Environmental Microbiology Research Group IIQB-Universidad Michoacana de San Nicolás de Hidalgo, 58040 Morelia-México
| | - Liliana Márquez-Benavides
- Solid Waste Research Group IIAF-Universidad Michoacana de San Nicolás de Hidalgo, 58302 Morelia-México; Mexican Society of Science and Technology Applied to Solid Waste, Av. Cuauhtémoc 403, Col. Roma Norte, Delegación Cuauhtémoc, D.F., 06700 México
| | - Juan Manuel Sánchez-Yáñez
- Environmental Microbiology Research Group IIQB-Universidad Michoacana de San Nicolás de Hidalgo, 58040 Morelia-México.
| |
Collapse
|
38
|
Bak JS. Bioprocess-Technological Potential of Irradiation-Based Fungal Pretreatment Platform Relevant to Lignocellulolytic Biocascade. Appl Biochem Biotechnol 2015; 177:1654-64. [PMID: 26378010 DOI: 10.1007/s12010-015-1843-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/08/2015] [Indexed: 11/30/2022]
Abstract
Lignocellulose-decaying fungal bioplatforms available are not commercially accessible and are limited to short-term use. In this study, those limitations were overcome by developing a platform using water-soaked rice straw (RS) biodegraded by irradiation-based fungal pretreatment (IBFP). This eco-friendly system increased the ability of RS to biodegrade and ferment without the generation of inhibitory compounds. When processed RS (i.e., with a water-soaking ratio of 81 % and irradiation dose of 80 kGy at 1 MeV and 0.12 mA) was pretreated with Dichomitus squalens for 9 days, the sugar yield was 58.5 % of the theoretical maximum. This sugar yield was comparable to that obtained with unirradiated RS for 15 days, which was 57.9 %. Furthermore, the ethanol concentration of 9.7 g L(-1) provided a yield of 58.1 %; the theoretical maximum and productivity at 0.40 g L(-1) h(-1) were determined after simultaneous saccharification and fermentation for 24 h. In addition, microscopic images revealed that IBFP induced predominant ultrastructural modifications to the surface of cell wall fibers. The peroxidative profiles for different biosystems were analyzed in order to understand substrate-specific biocascades based on the differences in biomass components. The activation level of core lignocellulolysis-related factors was analogous under the optimized conditions of each system.
Collapse
Affiliation(s)
- Jin Seop Bak
- Department of Chemical & Biomolecular Engineering, Advanced Biomass R&D Center, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea. .,Institute of Advanced Machines and Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
| |
Collapse
|
39
|
Ghorbani F, Karimi M, Biria D, Kariminia H, Jeihanipour A. Enhancement of fungal delignification of rice straw by Trichoderma viride sp. to improve its saccharification. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.05.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
40
|
Bak JS. Bioprocess Evaluation of Water Soaking-Based Microbiological Biodegradation with Exposure of Cellulosic Microfibers Relevant to Bioconversion Efficiency. Appl Biochem Biotechnol 2015; 176:2290-302. [PMID: 26123084 DOI: 10.1007/s12010-015-1718-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/15/2015] [Indexed: 11/28/2022]
Abstract
To verify the interconnective relationship between biodegradation efficiency and microfibril structure, recalcitrant rice straw (RS) was depolymerized using water soaking-based microbiological biodegradation (WSMB). This eco-friendly biosystem, which does not predominantly generate inhibitory metabolites, could increase both the hydrolytic accessibility and fermentation efficiency of RS. In detail, when swollen RS (with Fenton cascades) was simultaneously bio-treated with Phanerochaete chrysosporium for 12 days, the biodegradability was 65.0 % of the theoretical maximum at the stationary phase. This value was significantly higher than the 30.3 % measured from untreated RS. Similarly, the WSMB platform had an effect on the yield enhancement of ethanol productivity of 32.5 %. However, uniform exposure of fibril polymers appeared to have little impact on bioconversion yields. Additionally, the proteomic pools of the WSMB system were analyzed to understand either substrate-specific or nonspecific biocascades based on the change in microcomposite materials. Remarkably, regardless of modified microfibril chains, the significant pattern of 14 major proteins (|fold| > 2) was reasonably analogous in both systems, especially for lignocellulolysis-related targets.
Collapse
Affiliation(s)
- Jin Seop Bak
- Department of Chemical and Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea,
| |
Collapse
|
41
|
Plácido J, Capareda S. Ligninolytic enzymes: a biotechnological alternative for bioethanol production. BIORESOUR BIOPROCESS 2015. [DOI: 10.1186/s40643-015-0049-5] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
42
|
Zhao L, Cao GL, Wang AJ, Ren HY, Zhang K, Ren NQ. Consolidated bioprocessing performance of Thermoanaerobacterium thermosaccharolyticum M18 on fungal pretreated cornstalk for enhanced hydrogen production. BIOTECHNOLOGY FOR BIOFUELS 2014; 7:178. [PMID: 25648837 PMCID: PMC4296546 DOI: 10.1186/s13068-014-0178-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 12/03/2014] [Indexed: 06/01/2023]
Abstract
BACKGROUND Biological hydrogen production from lignocellulosic biomass shows great potential as a promising alternative to conventional hydrogen production methods, such as electrolysis of water and coal gasification. Currently, most researches on biohydrogen production from lignocellulose concentrate on consolidated bioprocessing, which has the advantages of simpler operation and lower cost over processes featuring dedicated cellulase production. However, the recalcitrance of the lignin structure induces a low cellulase activity, making the carbohydrates in the hetero-matrix more unapproachable. Pretreatment of lignocellulosic biomass is consequently an extremely important step in the commercialization of biohydrogen, and for massive realization of lignocellulosic biomass as alternative fuel feedstock. Thus, development of a pretreatment method which is cost efficient, environmentally benign, and highly efficient for enhanced consolidated bioprocessing of lignocellulosic biomass to hydrogen is essential. RESULTS In this research, fungal pretreatment was adopted for enhanced hydrogen production by consolidated bioprocessing performance. To confirm the fungal pretreatment efficiency, two typical thermochemical pretreatments were also compared side by side. Results showed that the fungal pretreatment was superior to the other pretreatments in terms of high lignin reduction of up to 35.3% with least holocellulose loss (the value was only 9.5%). Microscopic structure observation combined with Fourier transform infrared spectroscopy (FTIR) analysis further demonstrated that the lignin and crystallinity of lignocellulose were decreased with better holocellulose reservation. Upon fungal pretreatment, the hydrogen yield and hydrogen production rate were 6.8 mmol H2 g(-1) pretreated substrate and 0.89 mmol L(-1) h(-1), respectively, which were 2.9 and 4 times higher than the values obtained for the untreated sample. CONCLUSIONS Results revealed that although all pretreatments could contribute to the enhancement of hydrogen production from cornstalk, fungal pretreatment proved to be the optimal method. It is apparent that besides high hydrogen production efficiency, fungal pretreatment also offered several advantages over other pretreatments such as being environmentally benign and energy efficient. This pretreatment method thus has great potential for application in consolidated bioprocessing performance of hydrogen production.
Collapse
Affiliation(s)
- Lei Zhao
- />State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090 China
| | - Guang-Li Cao
- />State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090 China
- />School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150090 China
| | - Ai-Jie Wang
- />State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090 China
| | - Hong-Yu Ren
- />State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090 China
| | - Kun Zhang
- />College of Power and Energy Engineering, Harbin Engineering University, Harbin, 150001 China
| | - Nan-Qi Ren
- />State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090 China
| |
Collapse
|
43
|
Purification and Characterization of Haloalkaline, Organic Solvent Stable Xylanase from Newly Isolated Halophilic Bacterium-OKH. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2014; 2014:198251. [PMID: 27350996 PMCID: PMC4897549 DOI: 10.1155/2014/198251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 06/21/2014] [Accepted: 06/23/2014] [Indexed: 11/17/2022]
Abstract
A novel, alkali-tolerant halophilic bacterium-OKH with an ability to produce extracellular halophilic, alkali-tolerant, organic solvent stable, and moderately thermostable xylanase was isolated from salt salterns of Mithapur region, Gujarat, India. Identification of the bacterium was done based upon biochemical tests and 16S rRNA sequence. Maximum xylanase production was achieved at pH 9.0 and 37°C temperature in the medium containing 15% NaCl and 1% (w/v) corn cobs. Sugarcane bagasse and wheat straw also induce xylanase production when used as carbon source. The enzyme was active over a range of 0-25% sodium chloride examined in culture broth. The optimum xylanase activity was observed at 5% sodium chloride. Xylanase was purified with 25.81%-fold purification and 17.1% yield. Kinetic properties such as Km and Vmax were 4.2 mg/mL and 0.31 μmol/min/mL, respectively. The enzyme was stable at pH 6.0 and 50°C with 60% activity after 8 hours of incubation. Enzyme activity was enhanced by Ca(2+), Mn(2+), and Mg(2+) but strongly inhibited by heavy metals such as Hg(2+), Fe(3+), Ni(2+), and Zn(2+). Xylanase was found to be stable in organic solvents like glutaraldehyde and isopropanol. The purified enzyme hydrolysed lignocellulosic substrates. Xylanase, purified from the halophilic bacterium-OKH, has potential biotechnological applications.
Collapse
|
44
|
Laccase applications in biofuels production: current status and future prospects. Appl Microbiol Biotechnol 2014; 98:6525-42. [DOI: 10.1007/s00253-014-5810-8] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/30/2014] [Accepted: 05/01/2014] [Indexed: 11/27/2022]
|
45
|
Gai YP, Zhang WT, Mu ZM, Ji XL. Involvement of ligninolytic enzymes in degradation of wheat straw by Trametes trogii. J Appl Microbiol 2014; 117:85-95. [DOI: 10.1111/jam.12529] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/27/2014] [Accepted: 04/15/2014] [Indexed: 11/27/2022]
Affiliation(s)
- Y.-P. Gai
- State Key Laboratory of Crop Biology; Shandong Agricultural University; Taian Shan-dong China
| | - W.-T. Zhang
- College of Forestry; Shandong Agricultural University; Taian Shandong China
| | - Z.-M. Mu
- College of Forestry; Shandong Agricultural University; Taian Shandong China
| | - X.-L. Ji
- State Key Laboratory of Crop Biology; Shandong Agricultural University; Taian Shan-dong China
- College of Forestry; Shandong Agricultural University; Taian Shandong China
| |
Collapse
|
46
|
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.
Collapse
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
| |
Collapse
|
47
|
Screening of ecologically diverse fungi for their potential to pretreat lignocellulosic bioenergy feedstock. Appl Microbiol Biotechnol 2014; 98:3355-70. [PMID: 24504460 DOI: 10.1007/s00253-014-5563-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/20/2014] [Accepted: 01/21/2014] [Indexed: 10/25/2022]
Abstract
A widespread and hitherto by far underexploited potential among ecologically diverse fungi to pretreat wheat straw and digestate from maize silage in the future perspective of using such lignocellulosic feedstock for fermentative bioenergy production was inferred from a screening of nine freshwater ascomycetes, 76 isolates from constructed wetlands, nine peatland isolates and ten basidiomycetes. Wheat straw pretreatment was most efficient with three ascomycetes belonging to the genera Acephala (peatland isolate) and Stachybotrys (constructed wetland isolates) and two white-rot fungi (Hypholoma fasciculare and Stropharia rugosoannulata) as it increased the amounts of water-extractable total sugars by more than 50 % and sometimes up to 150 % above the untreated control. The ascomycetes delignified wheat straw at rates (lignin losses between about 31 and 40 % of the initial content) coming close to those observed with white-rot fungi (about 40 to 57 % lignin removal). Overall, fungal delignification was indicated as a major process facilitating the digestibility of wheat straw. Digestate was generally more resistant to fungal decomposition than wheat straw. Nevertheless, certain ascomycetes delignified this substrate to extents sometimes even exceeding delignification by basidiomycetes. Total sugar amounts of about 20 to 60 % above the control value were obtained with the most efficient fungi (one ascomycete of the genus Phoma, the unspecific wood-rot basidiomycete Agrocybe aegerita and one unidentified constructed wetland isolate). This was accompanied by lignin losses of about 47 to 56 % of the initial content. Overall, digestate delignification was implied to be less decisive for high yields of fermentable sugars than wheat straw delignification.
Collapse
|
48
|
Zhi Z, Wang H. White-rot fungal pretreatment of wheat straw with Phanerochaete chrysosporium for biohydrogen production: simultaneous saccharification and fermentation. Bioprocess Biosyst Eng 2014; 37:1447-58. [DOI: 10.1007/s00449-013-1117-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 12/15/2013] [Indexed: 11/30/2022]
|
49
|
Ji L, Yang J, Fan H, Yang Y, Li B, Yu X, Zhu N, Yuan H. Synergy of crude enzyme cocktail from cold-adapted Cladosporium cladosporioides Ch2-2 with commercial xylanase achieving high sugars yield at low cost. BIOTECHNOLOGY FOR BIOFUELS 2014; 7:130. [PMID: 25254072 PMCID: PMC4172917 DOI: 10.1186/s13068-014-0130-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 08/22/2014] [Indexed: 05/07/2023]
Abstract
BACKGROUND The efficiency and cost of current lignocellulosic enzymes still limit the large-scale production of cellulosic ethanol in industry. Residual lignin after pretreatment severely depresses the activity of polysaccharide hydrolases and the h ydrolysis of holocellulose. If we include in hydrolase mixture construction the ligninase involved in lignin degradation, which mainly includes laccase, manganese peroxidases (MnP) and lignin peroxidase (LiP), it is feasible that this could greatly improve the fermentable sugars yield. RESULTS The psychrophilic lignocellulosic enzymes system of Cladosporium cladosporioides Ch2-2 including ligninase and polysaccharide hydrolases was suitable for selective delignification and efficient saccharification of biomass with wide thermal adaptability. The purified laccase was optimally active at 15°C and pH 3.5, exhibiting high thermostability over a broad range of temperatures (between 4 and 40°C). In addition, manganese-independent peroxidase (MIP), a special type of ligninase with the capacity to oxidize dimethyl phthalate (DMP) in the absence of H2O2 and Mn(2+), was optimally active at 20°C and pH 2.5, exhibiting high thermostability over a broad range of temperatures (4 and 28°C), while depressed completely by Fe(2+) and essentially unaffected by EDTA. Synergy between Ch2-2 crude enzymes and commercial xylanase obviously enhanced biomass hydrolysis, which could take the place of expensive commercial cellulase mixture. The maximum value of synergistic degree reached 4.7 at 28°C, resulting in 10.1 mg/mL reducing sugars. CONCLUSIONS The psychrophilic enzymes system of C. cladosporioides Ch2-2 with a different synergistic mechanism has huge potential for the enhancement of biomass hydrolysis at mesophilic and low temperatures. The application scope of the lignocellulosic enzyme cocktail could be greatly enlarged by optimizing the operation conditions specific to the characteristics of ligninase.
Collapse
Affiliation(s)
- Lei Ji
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Jinshui Yang
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Hua Fan
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Yi Yang
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Baozhen Li
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Xuejian Yu
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Ning Zhu
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Hongli Yuan
- State Key Laboratory of Agrobiotechnology, MOA Key Laboratory of Soil Microbiology and National Energy R & D Center for Non-food Biomass, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| |
Collapse
|
50
|
Deswal D, Gupta R, Nandal P, Kuhad RC. Fungal pretreatment improves amenability of lignocellulosic material for its saccharification to sugars. Carbohydr Polym 2014; 99:264-9. [DOI: 10.1016/j.carbpol.2013.08.045] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/25/2013] [Accepted: 08/18/2013] [Indexed: 11/28/2022]
|