Microbial treatment of industrial lignin: Successes, problems and challenges

Asina, Fnu; Brzonova, Ivana; Kozliak, Evguenii; Kubátová, Alena; Yun, Jimmy

doi:10.1016/j.rser.2017.03.098

Cited by 91 publications

(47 citation statements)

References 294 publications

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“…Lignin crosslinking observed in this study has been known earlier, although it had not been identified as the dominant outcome of the fungal treatment. Oxidoreductases produced by basidiomycetes are usually linked to lignin degradation and decomposition towards monomers 8 . Yet, at the same time, those enzymes are also known to polymerize phenolic compounds (monomers and oligomers) 21 .…”

Section: Resultsmentioning

confidence: 99%

“…The current research efforts focus on production of phenolic monomers (e.g., vanillin, guaiacol) and other low-MW chemicals 5 , with their application in polymer industry 6 . The monomer production from lignin is usually low (5–35 wt%), with the rest being undesired phenolic oligomers or polymers 7 , 8 . Therefore polymers, either designed or undesired, are the primary ultimate products of lignin processing 3 .…”

Section: Introductionmentioning

confidence: 99%

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Production of lignin based insoluble polymers (anionic hydrogels) by C. versicolor

Brzonova

Kozliak

Andrianova

et al. 2017

Sci Rep

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Unlike previous lignin biodegradation studies, white rot fungi were used to produce functional biopolymers from Kraft lignin. Lignin-based polymers (hydrogel precursors) partially soluble in both aqueous and organic solvents were produced employing a relatively fast (6 days) enzymation of Kraft lignin with basidiomycetes, primarily Coriolus versicolor, pre-grown on kenaf/lignin agar followed by either vacuum evaporation or acid precipitation. After drying followed by a treatment with alkaline water, this intermediate polymer became a pH-sensitive anionic hydrogel insoluble in either aqueous or organic solvents. The yield of this polymer increased from 20 to 72 wt% with the addition of 2% dimethylsulfoxide to distilled water used as a medium. The mechanical stability and buffering capacity of this hydrogel can be adjusted by washing the intermediate polymer/hydrogel precursor prior to drying with solvents of different polarity (water, methanol or ethanol). Any of these polymers featured a significant thermal resilience assessed as a high thermostable “coked” fraction in thermal carbon analysis, apparently resulting from significant covalent cross-linking that occurs during the treatment of their intermediate precursors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Production of lignin based insoluble polymers (anionic hydrogels) by C. versicolor

Brzonova

Kozliak

Andrianova

et al. 2017

Sci Rep

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“…They use hydrogen peroxide (H 2 O 2 ) as co-substrates and are mostly heme proteins with an affinity for diverse substrate that include organic and inorganic compounds. Figure 3 shows their mechanism as they accelerate oxidations that in turn result in the formation of free radicals (e.g., phenoxyl and aryl cation radicals), reactive cations, (e.g., Mn 3+ ), or anions (e.g., OCl − ) which are involved in the degradation of lignin to release monolignols and humic substances, the oxidation of toxic compounds and nonspecific defense reactions [44,46]. This makes them suitable for industrial applications, as detailed in Figure 5.…”

Section: Lignin-degraders (Ligninolytic Enzymes)mentioning

confidence: 99%

Lignocellulolytic Enzymes in Biotechnological and Industrial Processes: A Review

et al. 2020

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Tons of anthropological activities contribute daily to the massive amount of lignocellulosic wastes produced annually. Unfortunately, their full potential usually is underutilized, and most of the biomass ends up in landfills. Lignocellulolytic enzymes are vital and central to developing an economical, environmentally friendly, and sustainable biological method for pre-treatment and degradation of lignocellulosic biomass which can lead to the release of essential end products such as enzymes, organic acids, chemicals, feed, and biofuel. Sustainable degradation of lignocellulosic biomass via hydrolysis is achievable by lignocellulolytic enzymes, which can be used in various applications, including but not limited to biofuel production, the textile industry, waste treatment, the food and drink industry, personal care industry, health and pharmaceutical industries. Nevertheless, for this to materialize, feasible steps to overcome the high cost of pre-treatment and lower operational costs such as handling, storage, and transportation of lignocellulose waste need to be deployed. Insight on lignocellulolytic enzymes and how they can be exploited industrially will help develop novel processes that will reduce cost and improve the adoption of biomass, which is more advantageous. This review focuses on lignocellulases, their use in the sustainable conversion of waste biomass to produce valued-end products, and challenges impeding their adoption.

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“…Lignin is the second most abundant plant polymer after cellulose with characteristics that make it suitable as an inexpensive hydrogel . This biopolymer is a significant resource for designing the next generation of petroleum‐free water‐absorbent hydrogels .…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Lignin‐Based Hydrogel for Use in Agricultural Soils: Preliminary Evidence

Mazloom

Khorassani

Zohuri

et al. 2019

CLEAN Soil Air Water

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In arid and semi‐arid regions of the world, agricultural production is greatly limited by water scarcity and inefficient water use. Water‐absorbent hydrogels are a technological solution that can retain soil water for plants. A lignin‐based hydrogel as a natural plant‐based water absorbent is prepared from lignin alkali polymers and poly(ethylene glycol) diglycidyl ether (PEGDGE) in adjusted alkali (NaOH) solution. The maximum swelling capacity of the hydrogel is achieved in 1.5 m NaOH with 0.5 mmol PEGDGE g lignin −1. Water swelling capacity is 34 g g Hydrogel −1 dry weight of hydrogel in distilled water, which is reduced to 53% and 64% in 0.1 m NaCl and 0.1 m CaCl2 solution, respectively. Biodegradability and phytotoxicity tests show that 6.5% of the sample mass decomposed after 40 days of incubation in soil solution media and the hydrogel is not phytotoxic to wheat seeds. These findings support the use of the lignin‐based hydrogel as an environmentally friendly additive to promote water retention in dry, saline soils. Due to the limitations of this study, further assessments are needed in order to understand the efficiency of lignin‐based hydrogel application in different soils with different biota.

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Microbial treatment of industrial lignin: Successes, problems and challenges

Cited by 91 publications

References 294 publications

Production of lignin based insoluble polymers (anionic hydrogels) by C. versicolor

Production of lignin based insoluble polymers (anionic hydrogels) by C. versicolor

Lignocellulolytic Enzymes in Biotechnological and Industrial Processes: A Review

Development and Characterization of Lignin‐Based Hydrogel for Use in Agricultural Soils: Preliminary Evidence

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