The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Nghị, Đỗ Hữu; Pham, Hieu H.; Le, Phung Thi Kim; Lauwaert, Jeroen; Diels, Ludo; Verberckmoes, An; N., Nga H.; Tran, Viet T.; Le, Phung K.

doi:10.1038/s41598-020-77867-5

Cited by 49 publications

(13 citation statements)

References 45 publications

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“…The total colour difference (∆E*) of the active lms with respect to the control PLA lm was higher for PLA-SWE180 lms (55.7) than PLA-SWE160 (45.1), while the lowest value was obtained for PLA-USHT lms (36.7). This is coherent with a higher ratio of coloured compounds in the extracts, since many chemicals present in the lignin fraction are responsible for the dark colour in plant matrices (Do et al, 2020). Likewise, the high temperatures and pressures applied in the SWE process could promote browning reactions, such as Maillard and caramelisation reactions, giving rise to more coloured/more intensely coloured extracts, mainly at 180°C, as previously reported (Plaza et al 2010b).…”

Section: Resultssupporting

confidence: 77%

Active poly (lactic acid) films with rice straw aqueous extracts for meat preservation purposes

Freitas

González-Martínez

Chiralt

2023

Preprint

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Aqueous extracts from rice straw, using ultrasound-assisted reflux heating extraction (USHT) and Subcritical Water Extraction (SWE), under two process conditions (160°C, 7 bars; and 180°C, 11 bars), were obtained and characterised as to their phenolic content and antioxidant and antimicrobial capacities. These extracts were incorporated (6% wt.) into PLA films by melt blending and compression moulding that were characterised as to their structural and functional properties and their capacity to preserve fresh pork meat, as vacuum thermo-sealed bags, throughout 16 days of cold storage. The extracts slightly reduced the extensibility, resistance to break and water barrier capacity of the PLA films but enhanced their oxygen barrier capacity and the UV light-blocking effect. The films with RS extracts were effective at preserving meat quality parameters, inhibiting microbial growth, meat oxidation, discolouration, and weight loss, thus extending the meat shelf life. The SWE extract obtained at 180°C was the most effective at obtaining active films for meat preservation, exhibiting the greatest antioxidant and antibacterial activity. Therefore, the green SWE technique is useful for obtaining active extracts from RS, allowing for its valorisation in the development of biodegradable active materials useful to extend the food shelf life.

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Section: Resultssupporting

confidence: 77%

Active poly (lactic acid) films with rice straw aqueous extracts for meat preservation purposes

Freitas

González-Martínez

Chiralt

2023

Preprint

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“…EDS analysis showed higher levels of silica in RS and SRS, which were reduced upon alkali pre-treatment. The surface of RS contains silica globules, which remain complexed with lignin polymers (Do et al, 2020). Lignin is a significant barrier in the deconstruction of lignocellulose as it reduces the enzymatic accessibility towards the cellulosic and hemicellulosic components.…”

Section: Discussionmentioning

confidence: 99%

Thermoxylanolytic and Thermosaccharolytic Potential of a Heat Adapted Bacterial Consortium Developed From Goat Rumen Contents

et al. 2021

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Thermoactive xylanases have important applications in the industrial deconstruction of lignocellulosic plant biomass, due to their sustained activity even at high temperature conditions of industrial bioreactors. We herein report the development of a thermoactive xylanolytic microbial consortium from the semi-digested contents of goat rumen and characterization of the xylanolytic enzyme cocktail produced by it. The consortium exhibited maximum endoxylanase activity at pH6 and at 60°C. Zymogram analysis revealed the production of multiple xylanases. The xylanase cocktail was stable over a pH range of 5–9 after pre-incubation for 3 h. It retained 74% activity after pre-incubation (60°C) for 50 min. It’s activity was enhanced in presence of β-mercaptoethanol, NH4+, Mg2⁺ and Ca2⁺, whereas Hg2⁺ had an inhibitory effect. The xylanolytic cocktail was further utilized for the saccharification of alkali pre-treated rice straw and mushroom spent rice straw. Saccharification was studied quantitatively using the dinitrosalicylic acid method and qualitatively using scanning electron microscopy. Results indicated the potential of the xylanolytic cocktail for the saccharification of rice straw and highlighted the significance of chemical and/or biological pre-treatment in improving the accessibility of the substrate towards the xylanase cocktail.

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“…However, the "Silicon Interference" of non-wood pulping and the contradiction between the increase in pulp demand and the insufficient capacity of the existing alkali recovery system restrict the development of pulp paper integration. Improving pulp production capacity is the key to expand the treatment capacity of alkali recovery system and reduce the impact of "Silicon Interference" [4][5][6][7][8] . Building a new alkali recovery system is the most direct and effective method, but is bound to increase the production cost of the pulp mill.…”

Section: Rheological Properties and Volumetric Isothermal Expansivity...mentioning

confidence: 99%

Rheological properties and volumetric isothermal expansivity of bamboo kraft black liquor with high solids content and low lignin content

Chen

Guo

et al. 2023

Sci Rep

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In this study, a certain percentage of lignin in original bamboo kraft black liquor (BKBL) was separated, and the residual BKBL with low lignin content was expected to be fed into the alkali recovery boiler to reduce the heat transfer load of the alkali recovery boiler. With the decrease in lignin content, the rheological properties/volumetric isothermal expansivity (VIE) of BKBL change. When the lignin content was 70% remaining in the original BKBL, the viscosity of BKBL with low lignin content is close to that of the passivated BKBL at the same solids content, the dynamic viscoelasticity is superior, and the VIE decreases by 57.2%. When the amount of desilication agent is 1.5%, the viscosity of BKBL with low lignin content did not change much, and the VIE increased sharply and was 62.7% higher than that of the passivated BKBL. Therefore, the combination of partial lignin separation process and sodium aluminate desilication process can effectively improve the ability of alkali recovery boiler to deal with BKBL and reduce the influence of “silicon interference”.

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The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Cited by 49 publications

References 45 publications

Active poly (lactic acid) films with rice straw aqueous extracts for meat preservation purposes

Active poly (lactic acid) films with rice straw aqueous extracts for meat preservation purposes

Thermoxylanolytic and Thermosaccharolytic Potential of a Heat Adapted Bacterial Consortium Developed From Goat Rumen Contents

Rheological properties and volumetric isothermal expansivity of bamboo kraft black liquor with high solids content and low lignin content

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