Effect of subcritical water pretreatment on cellulose recovery of water hyacinth ( Eichhornia crassipe)

Thi, Bich Thuyen Nguyen; Ong, Lu Ki; Thi, Dieu Thuy Nguyen; Ju, Yi‐Hsu

doi:10.1016/j.jtice.2016.12.028

Cited by 22 publications

(5 citation statements)

References 23 publications

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“…The results indicate that hemicellulose and lignin are soluble in the liquid fraction. Thi et al, who investigated the effect of subcritical water on Eichhornia crassipe, reached the same conclusion [45]. Only after subcritical water treatment was the C-O group in lignin visible at a wavelength of 1108 cm -1 , demonstrating that subcritical water treatment can localize lignin.…”

Section: Functional Group Analysismentioning

confidence: 68%

Optimization of Ultrasound-enhanced Subcritical Water Hydrolysis of Oil Palm Empty Fruit Bunch for the Production of Fermentable Sugar

Sangadji,

Wijaya,

Sangian

et al. 2024

Period. Polytech. Chem. Eng.

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To enhance the hydrolysis to produce fermentable sugar, oil palm empty fruit bunch (OPEFB) has undergone ultrasonication pretreatment prior to subjection to subcritical water hydrolysis. This work aims to optimize the effect of temperature, reaction time, and the concentration of sodium dodecyl sulfate (SDS) as the surfactant, with the primary aim of maximizing sugar production in the subcritical water hydrolysis process applied to oil palm empty fruit bunch (OPEFB). The pretreatment process conditions were optimized using response surface methodology of the central composite design (RSM–CCD). The experimental design includes three factors and levels, with a range of 180–220 °C temperature (X1), 60–80 minutes process time (X2), and 1–5% w/w SDS concentration (X3), an α value of 1.68, and reducing sugar concentration (g/L) as response (Y1). The optimum condition for subcritical water hydrolysis of OPEFB was obtained at 208 °C, 78 minutes, and 2.6% w/w SDS concentration with an expected yield of 6.09 g/L. As a result, reducing sugar produced by enzymatic hydrolysis increased by 324.7% compared to raw OPEFB, with sugar yield of 45.64% after 36 hours. Along these, changes in crystallinity, chemical composition, lignocellulosic functional groups, and morphology were analyzed to determine the impact of the pre-treatment on OPEFB.

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Section: Functional Group Analysismentioning

confidence: 68%

Optimization of Ultrasound-enhanced Subcritical Water Hydrolysis of Oil Palm Empty Fruit Bunch for the Production of Fermentable Sugar

Sangadji,

Wijaya,

Sangian

et al. 2024

Period. Polytech. Chem. Eng.

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“…Similarly, Rezania et al (2017b) observed the loss of the WH's structural integrity after the acid pretreatment by H2SO4. Thi et al (2017) reported that the pretreatment of WH by H2SO4 caused compression of the carbohydrate content with a major collapse of cellulose.…”

Section: Sem Analysis Of Pretreated Wh By Different Methodsmentioning

confidence: 99%

“…1, the untreated WH had a well-shaped fibril with a rigid lignin structure coated surface. Thi et al (2017) reported a firm and highly ordered structure in untreated WH biomass using SEM. Due to the stripping of WH cell wall due to the hydrolytic enzyme action, crude enzymes caused severe destruction of the fiber microstructure that improved the overall surface area and enzyme accessibility.…”

Section: Structural Analysis Of Wh Based On Sem Imagesmentioning

confidence: 99%

Changes in composition and structure of water hyacinth based on various pretreatment methods

Rezania

Alizadeh

Cho

et al. 2019

BioRes

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The deconstruction of cellulose, hemicellulose, and lignin has varying effects on lignocellulosic biomass. To understand and evaluate these effects it is important to conduct compositional and structural analyses. In this study, the effect of different pretreatments on the composition and structure of water hyacinth (WH) was investigated. The pretreatment methods investigated were acid, alkali, ionic liquid (IL), and microwave-alkali. The structural analysis was completed before and after the pretreatment using scanning electron microscopy. In addition, the biomass recovery rate was measured to evaluate the composition of the WH biomass. Based on the results, all pretreatment methods effectively disrupted the crystalline structure and enhanced the digestibility of the WH through increasing the cellulose and hemicellulose content and reducing the lignin content. The acid pretreatment resulted in high cellulose digestibility while the microwave-alkali pretreatment destroyed only the lignin structure of the WH. The alkali and IL pretreatments increased the cellulose and hemicellulose content of the WH. The highest recovery rate was obtained via IL pretreatment. The acid, microwave-alkali, and alkali pretreatments had the second, third, and fourth highest recovery rates, respectively. This study showed that the biomass recovery rate, compositional makeup, and structural analysis are important to use WH for bioenergy production.

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“…Water hyacinth is regarded as a malicious aquatic weed because of its speedy proliferation and ecological adaptability which creates severe impacts on the aquatic ecosystem and socio-economic progress [12,24]. Utilization of WH biomass as a raw material for biopolymer production is an attractive solution to mitigate the environmental pollution and waste disposal management at higher levels.…”

Section: Effects Of Chemical Pretreatment On Enzymatic Hydrolysis Of Whmentioning

confidence: 99%

“…Eichhornia crassipes, commonly known as water hyacinth (WH), is a rapid growing perennial aquatic noxious weed widely distributed in tropical and subtropical areas worldwide. Because of a higher growth rate (220 kg/ha/day) it forms a large mat on the surface of water and severely deteriorates the aquatic ecosystem [12,13]. However, WH biomass is primarily composed of high holocellulose (44-66.9% of dry matter) with a lower amount of lignin [14].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Noxious Weed Water Hyacinth Biomass as a Potential Feedstock for Biopolymers Production: A Novel Approach

et al. 2020

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This study aims to utilize a noxious weed water hyacinth biomass (WH) for polyhydroxybutyrate (PHB) production. Alkaline and peracetic acid pretreatment was employed for the hydrolysis of WH and consequently enzymatic saccharification to produce fermentable sugars for PHB production. The pretreatment competence was determined using various operational parameters. By applying ambient conditions, alkaline pretreatment gave higher lignin removal of 65.0%, with 80.8% hydrolysis yield, and on enzyme hydrolysis (40 FPU/g of dry WH), produced total reducing sugar of about 523 mg/g of WH. The resulted WH enzymatic hydolysates were evaluated for the production of PHB by Ralstonia eutropha (ATCC 17699). The WH hydrolysates cultivation was compared to synthetic hydrolysates that contain a similar carbon composition in terms of bacterial growth and PHB synthesis. The effects of various supplements to enhance PHB production were estimated. Supplementation of corn steep liquor (CSL) as a cheap nitrogen source with WH hydrolysates favored a higher amount of PHB synthesis (73%), PHB titer of 7.30 g/L and PHB yield of 0.429 g/g of reducing sugar. Finally, using standard analytical tools, the physical and thermal characteristics of the extracted PHB were evaluated. The findings revealed WH was a promising and technically feasible option for transforming biomass into sustainable biopolymer conversion on a large scale.

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Effect of subcritical water pretreatment on cellulose recovery of water hyacinth ( Eichhornia crassipe)

Cited by 22 publications

References 23 publications

Optimization of Ultrasound-enhanced Subcritical Water Hydrolysis of Oil Palm Empty Fruit Bunch for the Production of Fermentable Sugar

Optimization of Ultrasound-enhanced Subcritical Water Hydrolysis of Oil Palm Empty Fruit Bunch for the Production of Fermentable Sugar

Changes in composition and structure of water hyacinth based on various pretreatment methods

Utilization of Noxious Weed Water Hyacinth Biomass as a Potential Feedstock for Biopolymers Production: A Novel Approach

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