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Lignocellulosic agriculture wastes as biomass feedstocks for second-generation bioethanol production: concepts and recent developments

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TLDR
Mechanisms and recent advances in pretreatment, cellulases production and second-generation ethanol production processes are described here.
Abstract
Production of liquid biofuels, such as bioethanol, has been advocated as a sustainable option to tackle the problems associated with rising crude oil prices, global warming and diminishing petroleum reserves. Second-generation bioethanol is produced from lignocellulosic feedstock by its saccharification, followed by microbial fermentation and product recovery. Agricultural residues generated as wastes during or after processing of agricultural crops are one of such renewable and lignocellulose-rich biomass resources available in huge amounts for bioethanol production. These agricultural residues are converted to bioethanol in several steps which are described here. This review enlightens various steps involved in production of the second-generation bioethanol. Mechanisms and recent advances in pretreatment, cellulases production and second-generation ethanol production processes are described here.

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Journal ArticleDOI

The E factor 25 years on: the rise of green chemistry and sustainability

TL;DR: The role of catalysis in waste minimisation is discussed and illustrated with examples of green catalytic processes such as aerobic oxidations of alcohols, catalytic C-C bond formation and olefin metathesis as discussed by the authors.
Journal ArticleDOI

Fuel ethanol production from lignocellulosic biomass: an overview on feedstocks and technological approaches.

TL;DR: An overview on the diversity of biomass, technological approaches and microbial contribution to the conversion of lignocellulosic biomass (LCB) into ethanol can be found in this paper.
Journal ArticleDOI

Agro-industrial wastes and their utilization using solid state fermentation: a review

TL;DR: The use of agro-industrial wastes as raw materials can help to reduce the production cost and also reduce the pollution load from the environment as mentioned in this paper, and these residues can be used as an alternate source for the production of different products like biogas, biofuel, mushroom, and tempeh as the raw material in various researches and industries.
Journal ArticleDOI

Bioethanol production from renewable sources: Current perspectives and technological progress

TL;DR: In this paper, the authors present an overview on the first and second generation bioethanol production with a particular attention to the potential of various biomass sources, technological approaches, role of microorganisms and factors affecting ethanol production process.
Journal ArticleDOI

Second generation bioethanol production: A critical review

TL;DR: In this paper, the authors reviewed the existing variance of second generation bioethanol production methodologies, namely pre-treatment, hydrolysis, fermentation and distillation, as well as the worth of second-generation production for future reference.
References
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Journal ArticleDOI

Features of promising technologies for pretreatment of lignocellulosic biomass.

TL;DR: This paper reviews process parameters and their fundamental modes of action for promising pretreatment methods and concludes that pretreatment processing conditions must be tailored to the specific chemical and structural composition of the various, and variable, sources of lignocellulosic biomass.
Journal ArticleDOI

Hydrolysis of lignocellulosic materials for ethanol production: a review.

TL;DR: Simultaneous saccharification and fermentation effectively removes glucose, which is an inhibitor to cellulase activity, thus increasing the yield and rate of cellulose hydrolysis, thereby increasing the cost of ethanol production from lignocellulosic materials.
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Microbial cellulose utilization: fundamentals and biotechnology.

TL;DR: A concluding discussion identifies unresolved issues pertaining to microbial cellulose utilization, suggests approaches by which such issues might be resolved, and contrasts a microbially oriented cellulose hydrolysis paradigm to the more conventional enzymatically oriented paradigm in both fundamental and applied contexts.
ReportDOI

Biomass as Feedstock for A Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply

TL;DR: The U.S. Department of Energy and the United States Department of Agriculture have both strongly committed to expanding the role of biomass as an energy source as mentioned in this paper, and they support biomass fuels and products as a way to reduce the need for oil and gas imports; to support the growth of agriculture, forestry, and rural economies; and to foster major new domestic industries making a variety of fuels, chemicals, and other products.
Journal ArticleDOI

Review of Recent Research into Cellulosic Whiskers, Their Properties and Their Application in Nanocomposite Field

TL;DR: There are numerous examples where animals or plants synthesize extracellular high-performance skeletal biocomposites consisting of a matrix reinforced by fibrous biopolymers, which occur as whisker-like microfibrils that are biosynthesized and deposited in a continuous fashion.
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