Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production

Saratale, Ganesh Dattatraya; Jung, Moo Young; Oh, Min Kyu

doi:10.1016/j.biortech.2016.01.028

Cited by 69 publications

(28 citation statements)

References 27 publications

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“…For cellulosic ethanol production, initial biomass pretreatments are considered as crucial step for enhancing sequential enzymatic hydrolysis and final yeast fermentation [1,[21][22][23]. Over the past years, various chemical pretreatments have been performed to reduce lignocellulose recalcitrance in grasses, such as H 2 SO 4 , NaOH, CaO, Na 2 S + Na 2 CO 3 [24][25][26][27][28][29]. Acids and alkalis (H 2 SO 4 and NaOH) are the classical agents applied for pretreatment to enhance biomass enzymatic hydrolysis in woody plants, but these methods release wastes and cause serious secondary environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Brassinosteroid overproduction improves lignocellulose quantity and quality to maximize bioethanol yield under green-like biomass process in transgenic poplar

Fan

Qin

et al. 2020

Biotechnol Biofuels

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Background: As a leading biomass feedstock, poplar plants provide enormous lignocellulose resource convertible for biofuels and bio-chemicals. However, lignocellulose recalcitrance particularly in wood plants, basically causes a costly bioethanol production unacceptable for commercial marketing with potential secondary pollution to the environment. Therefore, it becomes important to reduce lignocellulose recalcitrance by genetic modification of plant cell walls, and meanwhile to establish advanced biomass process technology in woody plants. Brassinosteroids, plantspecific steroid hormones, are considered to participate in plant growth and development for biomass production, but little has been reported about brassinosteroids roles in plant cell wall assembly and modification. In this study, we generated transgenic poplar plant that overexpressed DEETIOLATED2 gene for brassinosteroids overproduction. We then detected cell wall feature alteration and examined biomass enzymatic saccharification for bioethanol production under various chemical pretreatments.Results: Compared with wild type, the PtoDET2 overexpressed transgenic plants contained much higher brassinosteroids levels. The transgenic poplar also exhibited significantly enhanced plant growth rate and biomass yield by increasing xylem development and cell wall polymer deposition. Meanwhile, the transgenic plants showed significantly improved lignocellulose features such as reduced cellulose crystalline index and degree of polymerization values and decreased hemicellulose xylose/arabinose ratio for raised biomass porosity and accessibility, which led to integrated enhancement on biomass enzymatic saccharification and bioethanol yield under various chemical pretreatments. In contrast, the CRISPR/Cas9-generated mutation of PtoDET2 showed significantly lower brassinosteroids level for reduced biomass saccharification and bioethanol yield, compared to the wild type. Notably, the optimal green-like pretreatment could even achieve the highest bioethanol yield by effective lignin extraction in the transgenic plant. Hence, this study proposed a mechanistic model elucidating how brassinosteroid regulates cell © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article' s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article' Full list of author information is available at the end of the article wall modification for reduced lignocellulose recalcitrance and increased biomass porosity and accessibility for high bioethanol production. Conclusions:This study has demonstrated a powerful strategy to enhance cell...

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Section: Introductionmentioning

confidence: 99%

Brassinosteroid overproduction improves lignocellulose quantity and quality to maximize bioethanol yield under green-like biomass process in transgenic poplar

Fan

Qin

et al. 2020

Biotechnol Biofuels

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“…In fact, organic waste materials are interesting renewable resources that can be converted into different value-added products, such as bioethanol or biochemicals obtained by sugar fermentation [2, 3]. Recent technological developments have explored the value of biochemical products as precursors to biopolymers, e.g., succinic acid [4, 5] and 2,3-butanediol [6] derived from lignocellulosic biomass. Some biopolymers can be produced by microorganisms from the accumulation of extracellular materials, such as exopolysaccharides (EPS) [7], and used in the food, chemical, cosmetic, and packaging industries as adhesives, absorbents, lubricants, and cosmetics.…”

Section: Introductionmentioning

confidence: 99%

Integrated systems for biopolymers and bioenergy production from organic waste and by-products: a review of microbial processes

Pagliano

Ventorino

Pánico

et al. 2017

Biotechnol Biofuels

141

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Recently, issues concerning the sustainable and harmless disposal of organic solid waste have generated interest in microbial biotechnologies aimed at converting waste materials into bioenergy and biomaterials, thus contributing to a reduction in economic dependence on fossil fuels. To valorize biomass, waste materials derived from agriculture, food processing factories, and municipal organic waste can be used to produce biopolymers, such as biohydrogen and biogas, through different microbial processes. In fact, different bacterial strains can synthesize biopolymers to convert waste materials into valuable intracellular (e.g., polyhydroxyalkanoates) and extracellular (e.g., exopolysaccharides) bioproducts, which are useful for biochemical production. In particular, large numbers of bacteria, including Alcaligenes eutrophus, Alcaligenes latus, Azotobacter vinelandii, Azotobacter chroococcum, Azotobacter beijerincki, methylotrophs, Pseudomonas spp., Bacillus spp., Rhizobium spp., Nocardia spp., and recombinant Escherichia coli, have been successfully used to produce polyhydroxyalkanoates on an industrial scale from different types of organic by-products. Therefore, the development of high-performance microbial strains and the use of by-products and waste as substrates could reasonably make the production costs of biodegradable polymers comparable to those required by petrochemical-derived plastics and promote their use. Many studies have reported use of the same organic substrates as alternative energy sources to produce biogas and biohydrogen through anaerobic digestion as well as dark and photofermentation processes under anaerobic conditions. Therefore, concurrently obtaining bioenergy and biopolymers at a reasonable cost through an integrated system is becoming feasible using by-products and waste as organic carbon sources. An overview of the suitable substrates and microbial strains used in low-cost polyhydroxyalkanoates for biohydrogen and biogas production is given. The possibility of creating a unique integrated system is discussed because it represents a new approach for simultaneously producing energy and biopolymers for the plastic industry using by-products and waste as organic carbon sources.

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“…7,11,28,29 Various authors obtained similar 2,3-butanediol concentrations to those in this work using ABH. 47 Batch wood hydrolysate fermentation obtained 13.3 g L −1 of 2,3-butanediol using a K. pneumoniae strain 39 ; batch fermentation using K. oxytoca in mineral medium with glucose achieved 10.9 g L −1 of 2,3-butanediol 31 ; batch fermentations using Enterobacter aerogenes on yellow poplar, larix and rice hull hydrolysates reported 14.3 g L −1 , 12.4 g L −1 and 10.2 g L −1 , respectively 48 ; and with rice waste biomass fermentation using K. pneumoniae obtained 11.4 g L −1 of 2,3-butanediol. 49 Therefore, the present study demonstrates that A. cupreata bagasse is a lignocellulosic residue which after acid pre-treatment offers great potential for 2,3-butanediol production, and it is feasible to use its hydrolysates with high yield for fermentation processes using the wild K. oxytoca UM2-17 strain as biocatalyzer.…”

Section: Discussionmentioning

confidence: 99%

“…Various authors obtained similar 2,3‐butanediol concentrations to those in this work using ABH . Batch wood hydrolysate fermentation obtained 13.3 g L −1 of 2,3‐butanediol using a K. pneumoniae strain; batch fermentation using K. oxytoca in mineral medium with glucose achieved 10.9 g L −1 of 2,3‐butanediol; batch fermentations using Enterobacter aerogenes on yellow poplar, larix and rice hull hydrolysates reported 14.3 g L −1 , 12.4 g L −1 and 10.2 g L −1 , respectively; and with rice waste biomass fermentation using K. pneumoniae obtained 11.4 g L −1 of 2,3‐butanediol …”

Section: Discussionmentioning

confidence: 99%

Production of 2,3‐butanediol by fermentation of enzymatic hydrolysed bagasse from agave mezcal‐waste using the native Klebsiella oxytoca UM2‐17 strain

Pasaye-Anaya

Vargas‐Tah

Martínez‐Cámara

et al. 2019

J of Chemical Tech & Biotech

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Background 2,3‐butanediol is a chemical component with wide industrial applications, such as biofuels and chemical precursors. Reducing 2,3‐butanediol production costs is a high priority and recent focus has been on its biological synthesis from raw renewable materials rather than through conventional chemical procedures. In this study, a 2,3‐butanediol native bacterial producer was selected for the fermentation of Agave cupreata bagasse waste by enzymatic hydrolysation to obtain 2,3‐butanediol. Results The native Klebsiella oxytoca UM2‐17 strain was selected to efficiently produce 2,3‐butanediol on synthetic mineral media. Using glucose (100 g L−1) and glucose: xylose (50 g L−1:50 g L−1) as sugar sources obtained titres of 29.36 g L−1 and 25.9 g L−1 of 2,3‐butanediol, corresponding to yields of 0.29 g g−1 and 0.26 g g−1, respectively. Agave bagasse solid waste after acid pre‐treatment was utilized to obtain enzymatic hydrolysates, obtaining liquors with glucose/xylose/arabinose at 25.8 g L−1 with efficiency of ∼52.5% sugar conversion from residual solid pre‐hydrolysed bagasse. The production of 2,3‐butanediol through batch fermentation of the enzymatic‐hydrolysate by the UM2‐17 strain showed total depletion of glucose and xylose, achieving a maximal production of 10.3 g L−1 of 2,3‐butanediol plus 0.28 g L−1 ethanol, corresponding to 2,3‐butanediol yield of 0.40 g g−1. Conclusion The results indicate that A. cupreata bagasse waste from mezcal beverage elaboration is a sustainable bioresource for production of 2,3‐butanediol by fermentation of enzymatic bagasse‐hydrolysate using the K. oxytoca UM2‐17 strain. © 2019 Society of Chemical Industry

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Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production

Cited by 69 publications

References 27 publications

Brassinosteroid overproduction improves lignocellulose quantity and quality to maximize bioethanol yield under green-like biomass process in transgenic poplar

Brassinosteroid overproduction improves lignocellulose quantity and quality to maximize bioethanol yield under green-like biomass process in transgenic poplar

Integrated systems for biopolymers and bioenergy production from organic waste and by-products: a review of microbial processes

Production of 2,3‐butanediol by fermentation of enzymatic hydrolysed bagasse from agave mezcal‐waste using the native Klebsiella oxytoca UM2‐17 strain

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