Optimization of Parameters for Alkali Pretreatment on Coir Fiber for Biomass Production Using TOPSIS.

Verma, Sushma; Midha, Vinay Kumar; Choudhary, Awadesh Kumar

doi:10.1080/15440478.2020.1838994

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…Furthermore, a similar increase in lignin content with increasing torrefaction temperature has been reported for woody biomass, agricultural reuse, and wood waste [13,16]. After alkali treatment, the lignin content in the TB at 300 • C decreased from 51% to 45%, owing to swelling of the fibers in the RWW, leading to the formation of a larger surface area for the action of -OH ions on the ferulic acid linkages of lignin, which aids in improving the delignification process [33]. Furthermore, increasing the temperature of the torrefaction process led to increased ash content in both TB and alkali-treated TB.…”

Section: Chemical Composition Of Biomasssupporting

confidence: 67%

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Cahyanti,

Shanmugam,

Kikas

2023

Energies

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Abundant availability of lignocellulosic biomass (LCB) coupled with diverse pretreatment methods have made it a promising option for energy production. However, it faces several challenges, some of which can be overcome by integrating pretreatment processes. The present study aims to optimize the integration of two different pretreatment methods—torrefaction (to reduce moisture content and fractionate biomass) and alkaline pretreatment of wood waste (to delignify biomass)—and utilize it for bioethanol production. Pretreatment performance was evaluated based on delignification, biomass hydrolysis, and bioethanol production. Initially, torrefaction was performed in a continuous reactor at a temperature range of 225–300 °C, followed by optimization of the critical parameters of alkaline pretreatment of torrefied wood waste (TWW), that is, the temperature, reaction time, solid–liquid ratio, and alkali concentration. Subsequently, the chemical and carbohydrate compositions of raw wood waste (RWW) and TWW were studied, followed by enzymatic hydrolysis and bioethanol fermentation. Integrated pretreatment positively impacted the cellulose and glucose contents of raw and torrefied biomass at lower temperatures. The enzymatic hydrolysis of TWW treated with alkali produced higher levels of glucose and bioethanol than (stand-alone) TWW. These results can be used as a basis for choosing the most suitable pretreatment for enhanced biomass conversion.

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Section: Chemical Composition Of Biomasssupporting

confidence: 67%

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Cahyanti,

Shanmugam,

Kikas

2023

Energies

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“…The smaller the measured factor entropy, the higher the discrete level. Entropy can be calculated by the following formula (Sushma et al., 2022; Wang, Fan, et al., 2022; Wang, Zhao, et al., 2021; Zhang, Wang, et al., 2022):

\begin{equation}{e}_j = \frac{{ - 1}}{{\ln n}}\sum_{i = 1}^n {{P}_{ij}} \ln \left( {{P}_{ij}} \right),\end{equation}

where e j is the entropy value of the j th indicator.…”

Section: Methodsmentioning

confidence: 99%

“…The smaller the measured factor entropy, the higher the discrete level. Entropy can be calculated by the following formula (Sushma et al, 2022;Wang, Fan, et al, 2022;Zhang, Wang, et al, 2022):…”

Section: Entropy Calculationmentioning

confidence: 99%

Evaluation of the effect of ultrasonic pretreatment on vacuum far‐infrared drying characteristics and quality of Angelica sinensis based on entropy weight‐coefficient of variation method

Zang

Huang

Zhang

et al. 2023

Journal of Food Science

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This study investigated the effects of ultrasonic pretreatment time, ultrasonic power, and ultrasonic frequency on the drying characteristics and physicochemical quality of Angelica sinensis, and the physicochemical quality content was selected as the evaluation index, the entropy weight-coefficient of variation method was used to calculate the coupling weight and comprehensive score, and the weighted Technique for Order Preference by Similarity to Ideal Solution method was used to verify the evaluation model. The results showed that the drying rate of materials after ultrasonic treatment was increased by 22.48% to 93.26%, and the effective moisture diffusivity was in the range between 4.6831 × 10 −9 and 7.0722 × 10 −9 m 2 /s, and the drying activation energy was 31.90 kJ/mol.The energy consumption decreased by 5.75% to 25.88%. Compared with the samples without the ultrasonic pretreatment, the chlorogenic acid, ferulic acid, senkyunolide H, senkyunolide I, 3-butenylphthalide, ligustilide, polysaccharides, total phenolic content, total flavonoid content, and antioxidant capacity of A. sinensis were increased after ultrasonic treatment, and the color, rehydration ratio, shrinkage ratio, and microstructure of dried products were improved significantly (p < 0.05). However, the quality of the dried products decreased after ultrasonic treatment for 40 min with an ultrasonic frequency of 60 kHz, and the internal tissue structure was destroyed. In summary, ultrasonic pretreatment at low frequency and high power can significantly increase the drying rate and improve the physicochemical quality of dried products.

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“…It is evident from Figure 2 that erosion control percentage increases when the plain-woven structure of the geomeshes was altered to twill-woven geomeshes and decreases when altered to a satin-woven structure. Coir fibre contains 35-45% lignin, which leads to higher flexural rigidity in the plain-woven structure (Table 1) [17][18]. For this reason, coir geomeshes demonstrated less contact with the soil, resulting in lower erosion control.…”

Section: Runoff Erosion Control Performance Of Jute and Coir Geomeshe...mentioning

confidence: 99%

“…In coir geomeshes, germination occurred on the sixth day and started after two days in jute geomeshes. This reason for the difference in the start of germination leas in the fact that jute geomeshes facilitate the faster initial growth of vegetation due to their finer and softer yarns than the coir geomeshes [18]. In jute geomeshes, 100% vegetation was observed at the end of 21 days.…”

Section: Germination Testmentioning

confidence: 99%

Effect of Parameters on the Runoff Erosion Control Performance of Structurally Modified Jute and Coir Geomeshes over Loamy Sand

Verma

Midha

Choudhary

2021

TEKS

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Soil erosion is a serious environmental problem that can be controlled using bioengineering techniques. In using a bioengineering technique, temporary reinforcement is performed with geomeshes until vegetation takes root. In this study, structurally modified jute and coir geomeshes were tested for runoff erosion control and runoff volume over loamy sand at different slope angles. The laboratory results revealed that all parameters (slope angle, type of weave and type of material) had a significant effect on the erosion control performance of geomeshes. The slope angle contributed most (52.34%) to runoff erosion control, followed by weave type (25.79%) and type of material (12.28%). At lower and medium slope angles (of 15o and 30o, respectively) the twill-woven structure of coir geomeshes provided better erosion control than plain- and satin-woven structures, while plain-woven jute geomeshes demonstrated better erosion control at all slope angles. To understand the overall impact, a germination test was also conducted. According to the germination test results, the twill weave of jute geomeshes provided the highest rooting length. In general, plain-woven jute geomeshes are preferred for better erosion control on a high slope angle, while plain and twill can be used on a low slope angle.

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Optimization of Parameters for Alkali Pretreatment on Coir Fiber for Biomass Production Using TOPSIS.

Cited by 7 publications

References 17 publications

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Evaluation of the effect of ultrasonic pretreatment on vacuum far‐infrared drying characteristics and quality of Angelica sinensis based on entropy weight‐coefficient of variation method

Effect of Parameters on the Runoff Erosion Control Performance of Structurally Modified Jute and Coir Geomeshes over Loamy Sand

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