Valorization of agricultural residues: Different biorefinery routes

Ginni, G.; Kavitha, S.; R, Yukesh Kannah; Bhatia, Shashi Kant; S, Adish Kumar; Rajkumar, M.; Kumar, Gopalakrishnan; Pugazhendhi, Arivalagan; Lan, Nguyễn Thúy; Banu, J. Rajesh

doi:10.1016/j.jece.2021.105435

Cited by 82 publications

(24 citation statements)

References 160 publications

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“…8,9 Successful implementation of LCB biorefinery requires complete utilization and valorization of LCB components such as cellulose, hemicellulose, and lignin. 10,11 Besides, valorization of lignin provides additional benefits to improve the profitability of the biorefinery. 3,12,13 Valorizing lignin via a biological route was a possible way for generating biofuels and value-added products.…”

Section: Introductionmentioning

confidence: 99%

“…The existing biorefineries emphasize cellulose and hemicellulose conversion into biofuels and value-added products. − At the same time, lignin fraction is regarded as waste and can be exploited only as a lesser-value material . Lignin is one of the most abundant heterogeneous aromatic polymers, and hence, it can be utilized as a potential substrate for renewable bioproducts. , Successful implementation of LCB biorefinery requires complete utilization and valorization of LCB components such as cellulose, hemicellulose, and lignin. , Besides, valorization of lignin provides additional benefits to improve the profitability of the biorefinery. ,, Valorizing lignin via a biological route was a possible way for generating biofuels and value-added products. − Lignin, being a heterogenous polymer, consists of phenylpropane units. Three aromatic monolignols such as p -coumaryl, coniferyl, and sinapyl alcohol are cross-linked to form these phenylpropane units .…”

Section: Introductionmentioning

confidence: 99%

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Development of an Integrated Biorefinery System for Bioconversion of Lignocellulosic Biomass to Polyhydroxyalkanoates and Biohydrogen

Kavitha

Gunasekaran

et al. 2023

ACS Sustainable Chem. Eng.

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A sustainable lignocellulosic biomass-based biorefinery requires complete utilization and valorization of the biomass components. In the present study, a phase-separated pretreatment (chemo mechanicaldelignification followed by bacterial pretreatment) was performed to fractionate lignin and cellulose-rich residue from rice straw biomass (RSB) to utilize lignin for polyhydroxyalkanoates (PHA) and cellulose-rich residue for biohydrogen production. A higher lignin removal of 81.4% was obtained through combined H2O2–homogenizer pretreatment. The lignin was utilized as a substrate by Bacillus cereus for PHA production. The cellulose-rich delignified RSB was hydrolyzed with cellulase-secreting bacteria. A higher chemical oxygen demand solubilization of 38.2% was achieved in delignified and bacterially (Delig-Bac) pretreated RSB than bacterially pretreated (Bac) alone (22.9%) and control (3.43%). A higher cellulose solubilization of 35.8% was obtained in Delig-Bac pretreated RSB than Bac alone (21.5%). A higher PHA concentration, content, and yield of 480 mg/L, 56%, and 561 mg/g were obtained from 2.970 g/L of lignin. Higher biohydrogen production of 66 mL/gVS was achieved in Delig-Bac pretreated RSB. The economic analysis revealed that Delig-Bac was found to be economically feasible with a net profit of 4.18 USD/m3 when compared to Bac (−457.4 USD/m3).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of an Integrated Biorefinery System for Bioconversion of Lignocellulosic Biomass to Polyhydroxyalkanoates and Biohydrogen

Kavitha

Gunasekaran

et al. 2023

ACS Sustainable Chem. Eng.

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“…It was estimated that the mass ratios of rice straw and rice husk to rice production were approximately 100% and 20%, respectively [10]. Due to its richness in lignocellulosic constituents and other nutrients, the biomass is currently reused as a variety of by-products or application fields [4,7,8,10,[18][19][20][21]. Their industrial/agricultural reuses include surface retention (as mulch), soil amendment, poultry/livestock feed, composting, biofuel and so on.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical Characterization of Rice-Derived Residues for Fuel Use and Its Potential for Slagging Tendency

Tsai

Shen

Tsai

2023

Fire

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Rice is the most important cereal in Asia. However, it also results in the generation of large quantities of rice-derived residues (i.e., rice straw and rice husk). Due to the residues richness in lignocellulosic components, they potentially have considerable value in material and/or energy production without illegal burning in open fields. This work focused on investigating the thermochemical properties and inorganic/metal element contents of rice straw and rice husk. The former included proximate analysis, calorific value, thermogravimetric analysis (TGA) and energy dispersive X-ray spectroscopy (EDS). The latter covered the ten elements most relevant to their slagging/fouling indices. The results showed that they are suitable for energy use as biomass fuels, but rice husk was superior to rice straw because of the high silica content in the rice husk and the significant contents of potassium, sulfur and phosphorus in the rice straw. Using several slagging and fouling indices, the evaluation results were also consistent with their contents of inorganic elements or oxides. To increase the fuel properties of rice-derived residues, they could be pretreated with alkaline leaching, thus causing lower emissions of particulates and reduced slagging tendency when co-firing them with coal in industrial boilers.

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“…The fractionation of lignocellulose involves the breakdown of the complex interlinks between the structural components, improving the accessibility of the fractionation agents to cellulose and hemicelluloses [11]. Usually, this goal is achieved by consecutive treatments, which allow an integral benefit of the feedstock with minimal or no waste generation [12,13].…”

Section: Introductionmentioning

confidence: 99%

Single-Stage Fractionation of Vine Shoots Using Microwave Heating

Rivas¹,

Liñares²

2021

Applied Sciences

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Vine shoots are agricultural residues that can be used as a raw material in agro-biorefineries, in which their main constituents can be individually converted into valuable bioproducts. The treatment of vine shoots in uncatalyzed media containing water and 1-butanol enabled the single-stage separation of the major vine shoots constituents in different phases: the aqueous phase from treatments contained hemicellulose-derived products (mainly in the form of oligosaccharides), the organic phase accumulated the dissolved lignin, and the cellulosic fraction was recovered in solid phase. The aqueous phase from treatments was refined using membranes and processed with enzymes to obtain a refined product (RP) containing 92.2 g of oligosaccharides/100 g of non-volatile compounds. The oligosaccharides were mainly composed of anhydroxylose units substituted by acetyl and uronic groups. Enzymatic hydrolysis of RP with endo-xylanases reduced the average degree of polymerization to 2-3, which are preferred for application as healthy food ingredients. The solid phase from treatments was used as a substrate for enzymatic hydrolysis, enabling the production of solutions containing 34.9 g glucose /L and 4.2 g xylose /L.

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Valorization of agricultural residues: Different biorefinery routes

Cited by 82 publications

References 160 publications

Development of an Integrated Biorefinery System for Bioconversion of Lignocellulosic Biomass to Polyhydroxyalkanoates and Biohydrogen

Development of an Integrated Biorefinery System for Bioconversion of Lignocellulosic Biomass to Polyhydroxyalkanoates and Biohydrogen

Thermochemical Characterization of Rice-Derived Residues for Fuel Use and Its Potential for Slagging Tendency

Single-Stage Fractionation of Vine Shoots Using Microwave Heating

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