Consolidated bioethanol production from olive mill waste: Wood-decay fungi from central Morocco as promising decomposition and fermentation biocatalysts

M’Barek, Hasna Nait; Arif, Soukaina; Taidi, Behnam; Hajjaj, Hassan

doi:10.1016/j.btre.2020.e00541

Cited by 25 publications

(7 citation statements)

References 55 publications

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“…The presence of lignin, accounting for 24.07%, is linked to cellulose hydrolysis accessibility. Nait Mbarek et al [41] described the chemical composition of the same by-product from a previous year as containing 37.73% acid-insoluble lignin with a low content of acid-soluble lignin. Hemicellulose also showed a significant percentage of 27.17%.…”

Section: Chemical Composition Of the Olive Stonesmentioning

confidence: 99%

Lignocellulolytic Enzymes Production by Four Wild Filamentous Fungi for Olive Stones Valorization: Comparing Three Fermentation Regimens

Arif,

M’Barek,

Bekaert

et al. 2024

J. Microbiol. Biotechnol.

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Lignocellulolytic enzymes play a crucial role in efficiently converting lignocellulose into valuable platform molecules in various industries. However, they are limited by their production yields, costs, and stability. Consequently, their production by producers adapted to local environments and the choice of low-cost raw materials can address these limitations. Due to the large amounts of olive stones (OS) generated in Morocco which are still undervalued, Penicillium crustosum, Fusarium nygamai, Trichoderma capillare, and Aspergillus calidoustus, are cultivated under different fermentation techniques using this by-product as a local lignocellulosic substrate. Based on a multilevel factorial design, their potential to produce lignocellulolytic enzymes during 15 days of dark incubation was evaluated. The results revealed that P. crustosum expressed a maximum total cellulase activity of 10.9 IU/ml under sequential fermentation (SF) and 3.6 IU/ml of β-glucosidase activity under submerged fermentation (SmF). F. nygamai recorded the best laccase activity of 9 IU/ml under solid-state fermentation (SSF). Unlike T. capillare, SF was the inducive culture for the former activity with 7.6 IU/ml. A. calidoustus produced, respectively, 1,009 μg/ml of proteins and 11.5 IU/ml of endoglucanase activity as the best results achieved. Optimum cellulase production took place after the 5th day under SF, while ligninases occurred between the 9th and the 11th days under SSF. This study reports for the first time the lignocellulolytic activities of F. nygamai and A. calidoustus. Furthermore, it underlines the potential of the four fungi as biomass decomposers for environmentally-friendly applications, emphasizing the efficiency of OS as an inducing substrate for enzyme production.

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Section: Chemical Composition Of the Olive Stonesmentioning

confidence: 99%

Lignocellulolytic Enzymes Production by Four Wild Filamentous Fungi for Olive Stones Valorization: Comparing Three Fermentation Regimens

Arif,

M’Barek,

Bekaert

et al. 2024

J. Microbiol. Biotechnol.

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“…Despite the fact that there are many accounts of biological pretreatments showing high delignification percentages over lignocellulosic residues for bioethanol production, there are other works that have not shown elevated results or, at least, the results are confusing. An example of latter is the work of M´Barek et al (2020), who used native fungal strains such as Fusarium oxysporum and Fusarium solani from the central region of Morocco for delignification, saccharification, and bioethanol production using lignocellulosic residues of olive oil industry. They reported a yield of 0.84 g of ethanol/g of residue, even presenting yields over the theoretical yield because, in this particular research, the lignocellulosic residue was enriched with glucose during fermentation.…”

Section: Bioethanolmentioning

confidence: 99%

Are biological pretreatments of lignocellulosic residues a real option for biofuels production?

Alba Fierro,

Escobedo Bretado,

Núñez Ramírez

et al. 2024

BioRes

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The use of lignocellulosic residues as feedstocks for biofuels production represents an economic and ecofriendly option, since they are generated as byproducts or wastes from different industrial areas. Nevertheless, a pretreatment method aimed at eliminating the lignin content of these residues must be performed. This is required in order to increase cellulose bioavailability, which favors the production of reducing sugars through microbial or enzymatic attack. Some performed pretreatments can be classified as physical, chemical, and physicochemical methods. Although such methods are the most used pretreatments, they are expensive and generate or make use of harmful compounds. Biological methods, by the action of microorganisms or their enzymes for lignin content reduction, may be regarded as an alternative, being cheaper and more friendly to the environment than the aforementioned methods. However, until now, biological pretreatments have not shown the same yield as the previously mentioned methods in both sugar recovery and biofuel production. In that sense, the aim of this work is to review the efficiency of these methods, with the goal of clarifying their advantages and disadvantages for improvement of biofuel production.

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“…Nait M'Barek et al, assessed the potential of F. oxysporum for bioethanol production from non-valorized OMW (olive mill waste) using CBP. It showed maximum bioethanol yield and production of 0.84 g/g and 2.47 g/L, respectively, indicating its importance as a bio-agent for single-pot local bio-refinery [179]. Moreover, F. oxysporum BN converted imidazolium-based ionic liquid (IL)-pretreated rice straw to bioethanol via CBP with 64.2% of the theoretical yield of 0.125 g ethanol/g rice straw [164].…”

Section: Applications Of F Oxysporummentioning

confidence: 99%

Bright Side of Fusarium oxysporum: Secondary Metabolites Bioactivities and Industrial Relevance in Biotechnology and Nanotechnology

Ibrahim

Sirwi

Eid

et al. 2021

JoF

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Fungi have been assured to be one of the wealthiest pools of bio-metabolites with remarkable potential for discovering new drugs. The pathogenic fungi, Fusarium oxysporum affects many valuable trees and crops all over the world, producing wilt. This fungus is a source of different enzymes that have variable industrial and biotechnological applications. Additionally, it is widely employed for the synthesis of different types of metal nanoparticles with various biotechnological, pharmaceutical, industrial, and medicinal applications. Moreover, it possesses a mysterious capacity to produce a wide array of metabolites with a broad spectrum of bioactivities such as alkaloids, jasmonates, anthranilates, cyclic peptides, cyclic depsipeptides, xanthones, quinones, and terpenoids. Therefore, this review will cover the previously reported data on F. oxysporum, especially its metabolites and their bioactivities, as well as industrial relevance in biotechnology and nanotechnology in the period from 1967 to 2021. In this work, 180 metabolites have been listed and 203 references have been cited.

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Consolidated bioethanol production from olive mill waste: Wood-decay fungi from central Morocco as promising decomposition and fermentation biocatalysts

Abstract: Graphical abstract

Cited by 25 publications

References 55 publications

Lignocellulolytic Enzymes Production by Four Wild Filamentous Fungi for Olive Stones Valorization: Comparing Three Fermentation Regimens

Lignocellulolytic Enzymes Production by Four Wild Filamentous Fungi for Olive Stones Valorization: Comparing Three Fermentation Regimens

Are biological pretreatments of lignocellulosic residues a real option for biofuels production?

Bright Side of Fusarium oxysporum: Secondary Metabolites Bioactivities and Industrial Relevance in Biotechnology and Nanotechnology

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