Application of pretreatment, fermentation and molecular techniques for enhancing bioethanol production from grass biomass – A review

Mohapatra, Sushanta Kumar; Mishra, Chinmaya; Behera, Sudhanshu S.; Thatoi, Hrudayanath

doi:10.1016/j.rser.2017.05.026

Cited by 150 publications

(93 citation statements)

References 258 publications

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“…In addition, the efficiency of enzymatic saccharification is impeded because lignin irreversibly adsorbs hydrolytic enzymes (Berlin et al, 2006;Jørgensen, Kristensen, & Felby, 2007). In general, different pretreatment methods are used to remove lignin and enhance biomass digestibility (Mohapatra, Mishra, Behera, & Thatoi, 2017;Sun & Cheng, 2002). Therefore, low lignin contents are favorable to apply modest pretreatment conditions and efficient biomass saccharification.…”

Section: Lignin Contents and Structuresmentioning

confidence: 99%

Characterization of Miscanthus cell wall polymers

et al. 2018

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Efficient utilization of lignocellulosic Miscanthus biomass for the production of biochemicals, such as ethanol, is challenging due to its recalcitrance, which is influenced by the individual plant cell wall polymers and their interactions. Lignocellulosic biomass composition differs depending on several factors, such as plant age, harvest date, organ type, and genotype. Here, four selected Miscanthus genotypes ( Miscanthus sinensis , Miscanthus sacchariflorus , Miscanthus × giganteus , Miscanthus sinensis × Miscanthus sacchariflorus hybrid) were grown and harvested, separated into stems and leaves, and characterized for their non‐starch polysaccharide composition and structures, lignin contents and structures, and hydroxycinnamate profiles (monomers and ferulic acid dehydrodimers). Polysaccharides of all genotypes are mainly composed of cellulose and low‐substituted arabinoxylans. Ratios of hemicelluloses to cellulose were comparable, with the exception of Miscanthus sinensis that showed a higher hemicellulose/cellulose ratio. Lignin contents of Miscanthus stems were higher than those of Miscanthus leaves. Considering the same organs, the four genotypes did not differ in their Klason lignin contents, but Miscanthus × giganteus showed the highest acetylbromide soluble lignin content. Lignin polymers isolated from stems varied in their S/G ratios and linkage type distributions across genotypes. p ‐Coumaric acid was the most abundant ester‐bound hydroxycinnamte monomer in all samples. Ferulic acid dehydrodimers were analyzed as cell wall cross‐links, with 8‐5‐coupled diferulic acid being the main dimer, followed by 8‐O‐4‐, and 5‐5‐diferulic acid. Contents of p ‐coumaric acid, ferulic acid, and ferulic acid dimers varied depending on genotype and organ type. The largest amount of cell wall cross‐links was analyzed for Miscanthus sinensis .

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Section: Lignin Contents and Structuresmentioning

confidence: 99%

Characterization of Miscanthus cell wall polymers

et al. 2018

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“…Arundo donax is an important input of biofuel production, often analysed in several studies (see Table 3). For effective bioethanol production the pre-treatment of the grass biomass is required [4]. This also should be considered once assessing the life-cycle energy balance, as this part is the most energetic intensive part of the production [26].…”

Section: Giant Reed As Biofuel Inputmentioning

confidence: 99%

“…Several literature reviews including of giant reed also exist. However, they are mostly focusing on the technical aspects of A. donax cultivation, inter alia bioenergy production techniques [4], grassland management [5], combusting methods [6] or landfill sites revegetation and phytoremediation.…”

Section: Introductionmentioning

confidence: 99%

The Economics of Arundo donax—A Systematic Literature Review

Jámbor

Török

2019

Sustainability

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Arundo donax (giant reed) is an herbaceous, perennial and non-food crop producing dry biomass with relatively high yields in many regions and under different climates. Although there exists a large amount of literature on A. donax, the economic aspects are somehow neglected or are very much limited in most papers. Therefore, the aim of this paper is to analyse the economics of A. donax by applying a systematic literature review of the field. Our sample consists of 68 relevant studies out of the 6009 identified, classified into four groups: Bioenergy, agronomy, invasiveness and phytoremediation. Most papers were focusing on Italy and on the Mediterranean region and were written on the bioenergy aspect. Most studies suggest that A. donax has a relatively high energy balance and yields, high investment but low maintenance costs and high potentials for phytoremediation of contaminated soils. However, a certain section of the literature, mainly based on US experience, shows that giant reed should be produced with care due to its invasiveness hazard. On the whole, A. donax was found to have high economic potentials for biomass production in marginal as well as disadvantageous lands operated by small farmers in the Mediterranean region.

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“…Moreover, high-concentration ethanol as the endproduct severely blocked the glucose transport and metabolic system and thus suppressed the downstream metabolic pathway. 28 The ethanol tolerance of strains should be taken into consideration to reach high-solids loading and ethanol concentration in fed-batch SSF experiments. The influence of the initial ethanol concentration on the growth of S. cerevisiae Y-2034 and K. marxianus NCYC-587 was studied next.…”

Section: Ssf Processmentioning

confidence: 99%

Ethanol production from sugarcane bagasse by fed‐batch simultaneous saccharification and fermentation at high solids loading

Gao

Yuan

et al. 2018

Energy Science & Engineering

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To make the bioethanol conversion process economically viable, improving solids loading (>15% [w/v]) in different unit operations is crucial. In this study, alkali pretreatment of sugarcane bagasse was carried out at high solids loading. Temperature and pH were optimised via batch simultaneous saccharification and fermentation (SSF) experiments using Saccharomyces cerevisiae Y‐2034 or Kluyveromyces marxianus NCYC‐587. The effects of enzyme addition mode and solids loading on ethanol production were studied in fed‐batch SSF experiments. It was demonstrated that the optimised pH and temperature for both S. cerevisiae Y‐2034 and K. marxianus NCYC‐587 were 5.2 and 37°C. The mode of enzyme addition “one‐time dose” improved ethanol productivity better than the “batch addition” mode. With fresh substrates added, solids loading strongly increased from 19% to 33% (w/v), corresponded to a small decline in the ethanol yield. At the final solids loading of 33% (w/v), the highest ethanol concentration of 75.57 ± 2.14 g/L was obtained, with ethanol productivity of 0.63 ± 0.02 g/(L h) and a yield of 66.17 ± 1.87%.

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Application of pretreatment, fermentation and molecular techniques for enhancing bioethanol production from grass biomass – A review

Cited by 150 publications

References 258 publications

Characterization of Miscanthus cell wall polymers

Characterization of Miscanthus cell wall polymers

The Economics of Arundo donax—A Systematic Literature Review

Ethanol production from sugarcane bagasse by fed‐batch simultaneous saccharification and fermentation at high solids loading

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