Isolation and purification of lignin and silica from the black liquor generated during the production of bioethanol from rice straw

Minu, K.; Kurian, Jiby Kudakasseril; Kishore, V.V.N.

doi:10.1016/j.biombioe.2012.01.007

Cited by 152 publications

(79 citation statements)

References 19 publications

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“…Thus, pretreated GU has the potential for reducing fermentation costs. Liquid fraction (LF) obtained during the pretreatment has the phenolic derivatives from lignin and shows high pH (Minu et al 2012). It is surely hazardous to aquatic organisms.…”

Section: Resultsmentioning

confidence: 99%

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

Cha¹,

An²,

Park³

et al. 2014

BioResources

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In this study, alkaline pretreatment at a bench scale (15-L capacity) was performed to obtain a higher solid residue for the SSF (simultaneous saccharification and fermentation) of Miscanthus sacchariflorus "GoedaeUksae 1" (GU) under the following conditions: 1 M NaOH concentration, 150 °C, and 60 min residence time. Compositional analysis and scanning electron microscope analysis revealed the pretreatment to be highly effective for achieving delignification and morphological changes. Spiral impellers were used for the rapid liquefaction of pretreated GU into slurry, and no additional nutrients were added to the fermentation mixture to reduce overall process costs. The SSF was subsequently conducted in a laboratory-scale fermenter (5-L capacity) for 108 to 120 h with 12% and 16% glucan containing pretreated GU. Consequently, 62.8 g/L and 81.1 g/L of ethanol were obtained. Based on these data, the theoretical ethanol yields from 1 kg of GU (dry weight base) were estimated at 164.6 to 171.1 g/L.

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Section: Resultsmentioning

confidence: 99%

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

Cha¹,

An²,

Park³

et al. 2014

BioResources

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“…Energies 2016, 9, 13 2 liquor to pH = 2-4 to precipitate the lignin; subsequently, the wet lignin is obtained by filtering the mixture and then further processed [16].…”

Section: Electrolysis Of Black Liquormentioning

confidence: 99%

Generation of Hydrogen, Lignin and Sodium Hydroxide from Pulping Black Liquor by Electrolysis

2015

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Black liquor is generated in Kraft pulping of wood or non-wood raw material in pulp mills, and regarded as a renewable resource. The objective of this paper was to develop an effective means to remove the water pollutants by recovery of both lignin and sodium hydroxide from black liquor, based on electrolysis. The treatment of a 1000 mL of black liquor (122 g/L solid contents) consumed 345.6 kJ of electric energy, and led to the generation of 30.7 g of sodium hydroxide, 0.82 g of hydrogen gas and 52.1 g of biomass solids. Therefore, the recovery ratios of elemental sodium and biomass solids are 80.4% and 76%, respectively. Treating black liquor by electrolysis is an environmentally friendly technology that can, in particular, be an alternative process in addressing the environmental issues of pulping waste liquor to the small-scale mills without black liquor recovery.

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“…Lignin is the generic term for a large group of aromatic rigid and impervious polymers resulting from the oxidative coupling of 4-hydroxyphenylpropanoids, present predominantly in woody plants [6]. The chemical or biological degradation of lignin is very difficult due to the presence of recalcitrant and not-hydrolysable carbon-carbon linkages and aryl ether bonds [7]. Notwithstanding, pulp-and-paper mills are now facing challenges to comply with stringent environmental regulations [8].…”

Section: Introductionmentioning

confidence: 99%

Lignin Biodegradation in Pulp-and-Paper Mill Wastewater by Selected White Rot Fungi

Costa

Dedola

Pellizzari³

et al. 2017

Water

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An investigation has been carried out to explore the lignin-degrading ability of white rot fungi, as B. adusta and P. crysosporium, grown in different media containing (i) glucose and mineral salts; (ii) a dairy residue; (iii) a dairy residue and mineral salts. Both fungi were then used as inoculum to treat synthetic and industrial pulp-and-paper mill wastewater. On synthetic wastewater, up to 97% and 74% of lignin degradation by B. adusta and P. crysosporium, respectively, have been reached. On industrial wastewater, both fungal strains were able to accomplish 100% delignification in 8-10 days, independent from pH control, with a significant reduction of total organic carbon (TOC) of the solution. Results have confirmed the great biotechnological potential of both B. adusta and P. crysosporium for complete lignin removal in industrial wastewater, and can open the way to next industrial applications on large scale.

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Isolation and purification of lignin and silica from the black liquor generated during the production of bioethanol from rice straw

Cited by 152 publications

References 19 publications

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

Generation of Hydrogen, Lignin and Sodium Hydroxide from Pulping Black Liquor by Electrolysis

Lignin Biodegradation in Pulp-and-Paper Mill Wastewater by Selected White Rot Fungi

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