Recent advances in consolidated bioprocessing for conversion of lignocellulosic biomass into bioethanol – A review

Periyasamy, Selvakumar; Isabel, Jessica; Kavitha, S.; Viswanathan, Karthik; Mohamed, Badr A.; Gizaw, Desta Getachew; Sivashanmugam, P.; Aminabhavi, Tejraj M.

doi:10.1016/j.cej.2022.139783

Cited by 117 publications

(32 citation statements)

References 112 publications

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“…The parallel generation of stillage and recalcitrant substances with high COD values should be also considered. Therefore, efficient approaches to wastewater management must be included 60,61 …”

Section: Fermentative Processesmentioning

confidence: 99%

Exploiting waste derived from Musa spp. processing: Banana and plantain

Jiménez

López

Santos

et al. 2023

Biofuels Bioprod Bioref

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Banana and plantain (Musa spp.) are among the most popular crops especially in tropical and sub-tropical zones. Musa spp. is a unique, perennial, single-harvest plant that after fruit harvesting is decapitated and generates large amounts of waste and by-products: leaves and pseudostem. Fruit processing also generates waste peels and discarded pieces. Recent research has demonstrated that this type of organic substrate represents a potentially valuable resource that can be developed into high-value products. These developments are critically reviewed in this article, which includes a summary of the composition and biocompounds contained in pseudostem and peel, the use of Musa spp. waste in animal and human feed and the obtention of fiber to make paper, rope, handcrafts and combustion materials. On the other hand, the potential for polysaccharides to be fermented and transformed into ethanol, methane or hydrogen, the obtention of single-cell protein (microbial protein) and the use of solid residues for composting or as a substrate for mushrooms cultivation have also been evaluated. The applications described represent great opportunities for economic benefits from this agro-industrial waste. A scheme for the integrated utilization of Musa spp. waste in a biorefinery approach is presented as well.

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Section: Fermentative Processesmentioning

confidence: 99%

Exploiting waste derived from Musa spp. processing: Banana and plantain

Jiménez

López

Santos

et al. 2023

Biofuels Bioprod Bioref

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“…But because lignin acts as a significant barrier to the existing carbohydrates, pretreatment is an extremely important step in the processing of biomass in order to disrupt lignin and hemicellulose for efficient hydrolysis of cellulose in the following stage. Pretreatment, enzymatic hydrolysis, and fermentation are the three primary processes in the bioconversion of lignocellulosic biomass into bioethanol [25][26][27].…”

Section: Conversion Of Agricultural and Agro-industrial Residues Into...mentioning

confidence: 99%

Microbial Enzyme Systems in the Production of Second Generation Bioethanol

Soni¹,

Sharma²,

Soni³

2022

Preprint

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The primary contributor to global warming has been the careless usage of fossil fuels. Urbanization's threat to the depletion of these resources has made it necessary to find alternatives due to the rising demand. Four different forms of biofuels are now available and constitute a possible replacement for fossil fuels. The first generation of biofuels is generated from the edible portion of biomass, the second generation is made from the non-edible portion of biomass, the third generation is made from algal biomass, and the fourth generation is made using molecular biology to improve the algal strain. Second generation biofuels are extremely important because they are derived from non-edible biomass, such as agricultural and agro-industrial wastes rich in cellulose, hemicellulose, pectin, and starch impregnated with lignin, and are hydrolyzed after delignification by physio-chemical or biological pretreatments using ligninases. There has been a lot of research on their production using chemical and enzymatic hydrolysis, but it has not been economically viable in comparison to first generation biofuels due to the formation of several inhibitors with chemical hydrolysis and the high cost of the enzymes. Furthermore, the need for multiple enzymes due to the various types of carbohydrates in the feedstocks makes the enzymatic process too expensive. This article examines the enzymes involved in the hydrolysis of feedstocks for the production of second generation bioethanol, a highly acceptable biofuel.

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“…1,2 Therefore, bioethanol has been the focus of renewable energy development around the world so far. 3 At present, bioethanol is mainly produced by fermentation. 4 The accumulation of ethanol in the fermentation broth is detrimental to the growth of microbial cells, which leads to a low concentration of ethanol in the fermentation broth and a decline in ethanol production, resulting in higher energy consumption for ethanol recovery.…”

Section: Introductionmentioning

confidence: 99%