Current advances in on-site cellulase production and application on lignocellulosic biomass conversion to biofuels: A review

Siqueira, Joyce Gueiros Wanderley; Rodrigues, Cristine; Vandenberghe, Luciana Porto de Souza; Woiciechowski, Adenise Lorenci; Soccol, Carlos Ricardo

doi:10.1016/j.biombioe.2019.105419

Cited by 149 publications

(49 citation statements)

References 111 publications

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“…Endoglucanases (EG) initiate the enzymatic hydrolysis of celluloses, by which they reduce the degree of polymerization, as they split the chains in the amorphous regions of cellulose. Exoglucanases can produce cellobiose at reducing and non-reducing ends of cellulose chains, while β-glucosidases hydrolyze cellobiose to glucose molecules [ 70 , 71 , 72 , 73 ]. Hemicellulases are specific for the degradation of polysaccharides, which contain glucose, mannose, galactose, fructose, xylose, and different acids, such as galacturonic, acetic, ferulic, and others [ 74 , 75 ].…”

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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As the need for non-renewable sources such as fossil fuels has increased during the last few decades, the search for sustainable and renewable alternative sources has gained growing interest. Enzymatic hydrolysis in bioethanol production presents an important step, where sugars that are fermented are obtained in the final fermentation process. In the process of enzymatic hydrolysis, more and more new effective enzymes are being researched to ensure a more cost-effective process. There are many different enzyme strategies implemented in hydrolysis protocols, where different lignocellulosic biomass, such as wood feedstocks, different agricultural wastes, and marine algae are being used as substrates for an efficient bioethanol production. This review investigates the very recent enzymatic hydrolysis pathways in bioethanol production from lignocellulosic biomass.

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Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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“…The release of reducing sugars from purified xylan is highly dependent on the xylanase Microbial cellulase systems can be either complexed or non-complexed [4,53]. Both bacteria and fungi can produce cellulolytic complexes [84]. In aerobic bacteria and most actinomycetes, cellulases are non-complexed or free, secreted extracellularly using specific secretion pathways.…”

Section: Hydrolytic Enzymesmentioning

confidence: 99%

“…As the use of cellulase in the biofuel production chain increases, its demand and related research are expected to grow with a prediction to replace 30% of the petroleum fuels by 2025 [84]. Figure 8 summarizes the applications of cellulase.…”

Section: Applications Of Cellulolytic Enzymesmentioning

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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“…The results showed that the biomethane potential of cellulose was higher than that of hemicellulose; however, hemicellulose was hydrolyzed more quickly than cellulose, while lignin was very difficult to be digested (Li et al, 2018). Lignocellulosic enzymes, such as cellulases and xylanases were used to modify paper pulp characteristics (Siqueira et al, 2020). The tear strength of recycled paper was found to be increased after enzymatic treatment (Kumar et al, 2018).…”

Section: Application Of New and Special Enzymesmentioning

confidence: 99%

An overview of biomass conversion: exploring new opportunities

Fülöp¹,

Ecker²

2020

PeerJ

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Recycling biomass is indispensable these days not only because fossil energy sources are gradually depleted, but also because pollution of the environment, caused by the increasing use of energy, must be reduced. This article intends to overview the results of plant biomass processing methods that are currently in use. Our aim was also to review published methods that are not currently in use. It is intended to explore the possibilities of new methods and enzymes to be used in biomass recycling. The results of this overview are perplexing in almost every area. Advances have been made in the pre-treatment of biomass and in the diversity and applications of the enzymes utilized. Based on molecular modeling, very little progress has been made in the modification of existing enzymes for altered function and adaptation for the environmental conditions during the processing of biomass. There are hardly any publications in which molecular modeling techniques are used to improve enzyme function and to adapt enzymes to various environmental conditions. Our view is that using modern computational, biochemical, and biotechnological methods would enable the purposeful design of enzymes that are more efficient and suitable for biomass processing.

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Current advances in on-site cellulase production and application on lignocellulosic biomass conversion to biofuels: A review

Cited by 149 publications

References 111 publications

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Lignocellulolytic Enzymes in Biotechnological and Industrial Processes: A Review

An overview of biomass conversion: exploring new opportunities

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