Co-production of Monosaccharides and Hydrochar from Green Macroalgae Ulva (Chlorophyta) sp. with Subcritical Hydrolysis and Carbonization

Greiserman, Semion; Epstein, Michael; Chemodanov, Alexander; Steinbruch, Efraim; Prabhu, Meghanath; Guttman, Louis; Jinjikhashvily, Gabriel; Shamis, Olga; Gozin, Michael; Kribus, Abraham; Golberg, Alexander

doi:10.1007/s12155-019-10034-5

Cited by 13 publications

(5 citation statements)

References 50 publications

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“…Similar results were obtained in the subcritical water extraction of the brown seaweed Fucus vesiculosus, with a maximum sugar yield of 14% w/w obtained when using severities equal to or higher than 3.7 and a maximum sugar yield of 10 mg/g DW Ulva sp. corresponding to a severity of 3.9 . However, an optimal severity of 2.15 regarding the fucoidan yield was reported for Himanthalia elongata .…”

Section: Resultssupporting

confidence: 82%

“…Similar results in the decrease of extracted sugars with the increase of solid loading during hydrothermal pretreatments of marine biomass (green seaweed Ulva sp.) support these findings. , …”

Section: Resultssupporting

confidence: 76%

“…corresponding to a severity of 3.9. 38 However, an optimal severity of 2.15 regarding the fucoidan yield was reported for Himanthalia elongata. 39 Once again, these works (as the majority of the literature) do not present the composition of the polysaccharide fractions extracted, focusing only on the hydrolysis yield, making it difficult to establish relations between the different treatments employed.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…support these findings. 38,40 Enzymatic Susceptibility. Effect of Pretreatment Conditions on the Enzymatic Saccharification of Residual Biomass.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Valorization of Seaweed Carbohydrates: Autohydrolysis as a Selective and Sustainable Pretreatment

Gomes-Dias

Romaní

Teixeira

et al. 2020

ACS Sustainable Chem. Eng.

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Seaweeds are promising feedstocks; nevertheless, the lack of systematic approaches to recover different high-value fractions in a clean and sustainable mode hampers their exploitation. Due to this necessity, an innovative environmentally friendly strategy was proposed in this article for the development of a sugar platform from Gelidium sesquipedale: for the first time, autohydrolysis followed by enzymatic saccharification (with cellulolytic and agarolytic cocktails) was applied to agarophyte seaweeds. The wide range of severities (between 2.47 and 4.94) studied in this work proved that the autohydrolysis-based process can be tuned to selectively extract different target carbohydrate fractions. Gelling agents (reaching 30 g/100 g DW) can be obtained by the application of low severity treatments, fermentable sugars or oligosaccharides with the nutraceutical potential (reaching 14 g/100 g DW) are produced when severity is increased, and at the highest severity, platform chemicals (reaching 4 g/100 g DW) are the final product. The reduction of processing times compared to traditional extraction methodologies and the elimination of chemicals used in dilute acid treatments make this strategy a clean and sustainable alternative for the valorization of both glucan and galactan fractions of G. sesquipedale.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 76%

Section: ■ Results and Discussionmentioning

confidence: 99%

“…support these findings. 38,40 Enzymatic Susceptibility. Effect of Pretreatment Conditions on the Enzymatic Saccharification of Residual Biomass.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Valorization of Seaweed Carbohydrates: Autohydrolysis as a Selective and Sustainable Pretreatment

Gomes-Dias

Romaní

Teixeira

et al. 2020

ACS Sustainable Chem. Eng.

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“…Bioethanol yields based on various biomass sources are presented in Table 1 [24]. One of the main steps in the conversion of macroalgal biomass into chemicals and biofuels is the deconstruction of complex carbohydrates into sugars [25,26]. Reducing sugars include monosaccharides such as fructose, glucose, and galactose, as well as disaccharides namely maltose and lactose.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Ulva sp. Decomposition using H2SO4 with Microwave-Assisted Hydrolysis Method as Feedstock of Bioethanol

Palupi,

Rizalluddin,

Septianti

et al. 2023

CHEESA

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Bioethanol is a renewable energy used to reduce dependence on fossil fuels, which have negative impacts on the environment. Furthermore, Ulva sp. contains high levels of carbohydrates, making it potentially suitable as a raw material for bioethanol production. Therefore, this study aims to determine the optimal decomposition process using the microwave-assisted hydrolysis method with an acid solvent (H2SO4), by examining the effects of acid concentration, hydrolysis time, and microwave power. Optimization was carried out using several parameters such as hydrolysis time, microwave power, and the ratio of raw materials to solvents. The ANOVA test results showed that the hydrolysis variable parameter had a significant effect on the reducing sugar content obtained, evidenced by the R2 value of 0.9892. The highest reducing sugar content of 19.71 mg/mL was produced under the operating conditions of 15 min hydrolysis time, 450 W microwave power, and 0.065 g/mL ratio of raw material to solvents.

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Valorization of Wastes from the Food Production Industry: A Review Towards an Integrated Agri-Food Processing Biorefinery

Paini

Ail

Castaldi

et al. 2021

Waste Biomass Valor

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Co-production of Monosaccharides and Hydrochar from Green Macroalgae Ulva (Chlorophyta) sp. with Subcritical Hydrolysis and Carbonization

Cited by 13 publications

References 50 publications

Valorization of Seaweed Carbohydrates: Autohydrolysis as a Selective and Sustainable Pretreatment

Valorization of Seaweed Carbohydrates: Autohydrolysis as a Selective and Sustainable Pretreatment

Optimization of Ulva sp. Decomposition using H2SO4 with Microwave-Assisted Hydrolysis Method as Feedstock of Bioethanol

Valorization of Wastes from the Food Production Industry: A Review Towards an Integrated Agri-Food Processing Biorefinery

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