Chemo-enzymatic approaches for consolidated bioconversion of Saccharum spontaneum biomass to ethanol-biofuel

Vaid, Surbhi; Sharma, Surbhi; Bajaj, Bijender Kumar

doi:10.1016/j.biortech.2021.124898

Cited by 26 publications

(9 citation statements)

References 37 publications

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“…Technologies like combinatorial utilization of ILs with other treatment surfactants could elevate the treatment efficacy and decrease the whole process cost, owing to that the surfactants could prevent the lignin redeposition on the surface of polysaccharides. For example, in the combination treatment of Saccharum spontaneum biomass (SSB) with tris(2-hydroxyethyl)methylammonium methylsulfate ([TMA][MeSO 4 ]) and sodium dodecylsulfate (SDS), following its enzymatic hydrolysis under consolidated bioprocess (CBP), the sugar yield was increased by 2.35-fold in comparison with the untreated one ( Vaid et al, 2021 ). Moreover, Miscanthus hybrid ( Mx 27999) was pretreated by SE coupled with ILs and single treatments for the generation of oligosaccharides, respectively ( Bhatia et al, 2021 ).…”

Section: Combined Pretreatmentmentioning

confidence: 99%

Advances in Pretreatment of Straw Biomass for Sugar Production

Tan

et al. 2021

Front. Chem.

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Straw biomass is an inexpensive, sustainable, and abundant renewable feedstock for the production of valuable chemicals and biofuels, which can surmount the main drawbacks such as greenhouse gas emission and environmental pollution, aroused from the consumption of fossil fuels. It is rich in organic content but is not sufficient for extensive applications because of its natural recalcitrance. Therefore, suitable pretreatment is a prerequisite for the efficient production of fermentable sugars by enzymatic hydrolysis. Here, we provide an overview of various pretreatment methods to effectively separate the major components such as hemicellulose, cellulose, and lignin and enhance the accessibility and susceptibility of every single component. This review outlines the diverse approaches (e.g., chemical, physical, biological, and combined treatments) for the excellent conversion of straw biomass to fermentable sugars, summarizes the benefits and drawbacks of each pretreatment method, and proposes some investigation prospects for the future pretreatments.

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Section: Combined Pretreatmentmentioning

confidence: 99%

Advances in Pretreatment of Straw Biomass for Sugar Production

Tan

et al. 2021

Front. Chem.

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“…This bacterium has been widely used in various kinds of applications including cellulase production for saccharification and as an inoculum to enhance the composting process 34 , 35 . B. aerius is a thermophilic cellulolytic bacterium that was previously isolated from lignocellulosic waste and hot-spring sediment 30 , 36 .…”

Section: Resultsmentioning

confidence: 99%

Indigenous cellulolytic aerobic and facultative anaerobic bacterial community enhanced the composting of rice straw and chicken manure with biochar addition

Zainudin

Singam

Sazili

et al. 2022

Sci Rep

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Microbial degradation of organic matters is crucial during the composting process. In this study, the enhancement of the composting of rice straw and chicken manure with biochar was evaluated by investigating the indigenous cellulolytic bacterial community structure during the composting process. Compared with control treatment, composting with biochar recorded higher temperature (74 °C), longer thermophilic phase (> 50 °C for 18 days) and reduced carbon (19%) with considerable micro- and macronutrients content. The bacterial community succession showed that composting with biochar was dominated by the cellulolytic Thermobifida and Nocardiopsis genera, which play an important role in lignocellulose degradation. Twenty-three cellulolytic bacterial strains were successfully isolated at different phases of the composting with biochar. The 16S rRNA gene sequencing similarity showed that they were related to Bacilluslicheniformis, Bacillussubtilis,Bacillusaerius, and Bacillushaynesii, which were known as cellulolytic bacteria and generally involved in lignocellulose degradation. Of these isolated bacteria, Bacilluslicheniformis, a facultative anaerobe, was the major bacterial strain isolated and demonstrated higher cellulase activities. The increase in temperature and reduction of carbon during the composting with biochar in this study can thus be attributed to the existence of these cellulolytic bacteria identified.

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“…Lignocellulosic biomass is the most copious, low-cost, carbon-neutral, and high-energy density organic polymer present on this earth [32]. The production of renewable fuels from LCB not only boosts the global energy security, but also minimizes the wastes, helps rural economies, and reduces the environmental problems [33].…”

Section: Lignocellulose Composition and Structurementioning

confidence: 99%

“…The other variables which affect the biomass recalcitrance include the biomass porosity, and the presence of proteins, and acetyl groups [58]. Thus, fractionation of lignocellulosic components becomes essential for the extraction of monomeric sugars to produce biopolymers, biofuels, and bio-chemicals [1, 3,32]. Pretreatment of LCB is a very significant step in a biorefinery, which enables the efficient disintegration of biomass, increases the permeability, and surface area availability of polysaccharides towards enzymatic hydrolysis.…”

Section: Recent Advances In Pretreatment Technologies For Lignocellul...mentioning

confidence: 99%

Valorization of Lignocellulosic Biomass into Biofuels and Value-Added Products for Sustainable Environment: A Comprehensive Review

Sharma¹,

Tsai²,

Sharma³

et al. 2022

Preprint

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An upsurge in global population over the years and rapid urbanization have accelerated huge dependence on petroleum-derived fuels and consequent environment concerns owing to green-house gas emissions in the atmosphere. An integrated biorefinery uses lignocellulosic feedstock as raw material for the production of renewable biofuels, and other fine chemicals. The sustain-able bio-economy and the biorefinery industry would benefit greatly from the effective use of lignocellulosic biomass obtained from agricultural feedstocks to replace petrochemical products. Lignin, cellulose, hemicellulose, and other extractives, which are essential components of ligno-cellulosic biomass, must be separated or upgraded into useful forms in order to fully realize the potential of biorefinery. The development of low-cost and green pretreatment technologies with effective biomass deconstruction potential is imperative for an efficient bioprocess. The abun-dance of microorganisms along with their continuous production of various degradative en-zymes makes them suited for the environmentally friendly bioconversion of agro-industrial wastes into viable bioproducts. The present review highlights the concept of biorefinery, ligno-cellulosic biomass and its valorization by green pretreatment strategies into biofuels and other biochemicals. The major barriers and challenges in bioconversion technologies, environmental sustainability of the bioproducts and promising solutions to alleviate those bottlenecks are also summarized.

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Chemo-enzymatic approaches for consolidated bioconversion of Saccharum spontaneum biomass to ethanol-biofuel

Cited by 26 publications

References 37 publications

Advances in Pretreatment of Straw Biomass for Sugar Production

Advances in Pretreatment of Straw Biomass for Sugar Production

Indigenous cellulolytic aerobic and facultative anaerobic bacterial community enhanced the composting of rice straw and chicken manure with biochar addition

Valorization of Lignocellulosic Biomass into Biofuels and Value-Added Products for Sustainable Environment: A Comprehensive Review

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