Microbial delignification and hydrolysis of lignocellulosic biomass to enhance biofuel production: an overview and future prospect

Tsegaye, Bahiru; Balomajumder, Chandrajit; Roy, Partha

doi:10.1186/s42269-019-0094-x

Cited by 92 publications

(45 citation statements)

References 128 publications

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“…The choice of the strain of Sacch. cerevisiae "Omskie" as a biocatalyst made it possible to prepare wort for fermentation using traditional industrial methods (neutralization, vacuum rectification, continuous air purging, neutralization and filtration) [13]. Towards the end of 24-hour anaerobic fermentation the concentration of RB in the wort decreased to 2.5%, and the yield of ethanol was 52 ml/kg (paper waste) and 34 ml/kg (cardboard waste).…”

Section: Resultsmentioning

confidence: 99%

Features of using solid cellulose-containing domestic wastes for production of bioethanol

et al. 2020

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In this paper, we consider the process of producing biogas with a high methane content when used as a co-substrate for fermentation of plant residues of microalgae. Microalgae Chlorella sorokiniana are a valuable source for obtaining valuable components such as lipids, pigments, proteins, chlorophyll and others. After the extraction of valuable components, residual biomass is formed, which requires further disposal. In this experiment, the digestion process is carried out using an inoculant — lyophilically dried activated sludge from sewage treatment plants in Hamburg in the amount of 450 ml and residual biomass of the microalga Chlorella sorokiniana in the amount of 2.1 g. The studies were carried out in the Anaerobes Test system AMPT-II system. Fermentation produces 205 ml of methane gas.

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Section: Resultsmentioning

confidence: 99%

Features of using solid cellulose-containing domestic wastes for production of bioethanol

et al. 2020

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“…Osono and Takeda (2001) have reported the decrease in the initial C/P and C/K ratios during the leaf litter decomposition by fungi. The agro-industrial wastes are principally composed of a complex mixture of cellulose, hemicellulose and lignin which are used for the production of biofuels and other value-added products (Sadh et al 2018;Tsegaye et al 2019). Several fungal species have the ability to decompose lignocellulosic wastes by the successive production of a mixture of extracellular hydrolytic and oxidative (ligninolytic) enzymes (Navarro et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Biodegradation potential of indigenous litter dwelling ligninolytic fungi on agricultural wastes

Geethanjali¹,

Gowtham

Jayashankar

2020

Bull Natl Res Cent

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Background The present study was focused to study the efficiency of two indigenous litter dwelling ligninolytic fungi (such as Mucor circinelloides GL1 and Fusarium verticillioides GL5) in degrading the agricultural wastes (areca husk, coffee husk and paddy straw) through solid-state fermentation. Results After fermentation process, the lignocellulosic residues left over were evaluated for their physico-chemical studies and degradation pattern of cell wall constituents along with the activity of enzymes. In each substrate, the initial pH was found to change from near-neutral to acidic pH after fungal decomposition. Significantly increased loss of total organic matter and organic carbon content was observed in each substrate decomposed by the fungal strains selected. The total nitrogen, crude protein, total phosphorus and total potassium contents of the fungal decomposed substrates were significantly increased with the progress of time. The study indicated that the degradation patterns of lignin and holocellulose were more effective from 20 to 120 days after fungal inoculation with respect to their loss between the different harvesting intervals. During decomposition process, both the strains produced the ligninolytic enzymes [laccase, manganese peroxidase (MnP) and lignin peroxidase (LiP)] and carboxymethyl cellulase (CMCase) on each substrate with their remarkably varied activities with respect to different harvesting times. Conclusions In concern with the present environmental problems, the present study suggested that these potential ligninolytic fungi can be utilized successfully for the management of agricultural wastes and reuse of their residues in the forest soil conservation system to eliminate the harmful effects of the crop residue burning.

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“…The intensive capital investment required is also among the major reasons to the high production cost of lignocellulosic biofuels. Based on a study, it was predicted that simultaneous saccharification process accounted for 15% of the overall production cost, whereas pretreatment accounted for 17% of the production cost (Tsegaye et al, 2019). Currently, most of the reports available in the literature were performed at lab scale and there is limited information on the real-world production cost arising from all the stages involved in biofuel production from lignocellulosic biomass, i.e., delignification, hydrolysis, and fermentation.…”

Section: Concluding Remarks and Future Prospectsmentioning

confidence: 99%

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

et al. 2020

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Keywords:Lignocellulosic biomass has been recognized as promising feedstock for biofuels production. However, the high cost of pretreatment is one of the major challenges hindering large-scale production of biofuels from these abundant, indigenouslyavailable, and economic feedstock. In addition to high capital and operation cost, high water consumption is also regarded as a challenge unfavorably affecting the pretreatment performance. In the present review, advances in lignocellulose pretreatment technologies for biofuels production are reviewed and critically discussed. Moreover, the challenges faced and future research needs are addressed especially in optimization of operating parameters and assessment of total cost of biofuel production from lignocellulose biomass at large scale by using different pretreatment methods. Such information would pave the way for industrial-scale lignocellulosic biofuels production. Overall, it is important to ensure that throughout lignocellulosic bioethanol production processes, favorable features such as maximal energy saving, waste recycling, wastewater recycling, recovery of materials, and biorefinery approach are considered.

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Microbial delignification and hydrolysis of lignocellulosic biomass to enhance biofuel production: an overview and future prospect

Cited by 92 publications

References 128 publications

Features of using solid cellulose-containing domestic wastes for production of bioethanol

Features of using solid cellulose-containing domestic wastes for production of bioethanol

Biodegradation potential of indigenous litter dwelling ligninolytic fungi on agricultural wastes

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

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