High-temperature heating and microwave pretreatments: A new light in bamboo's enzymatic hydrolysis

Fu, Jiajia; Yu, Li; Qun, Zhang; Shen, Shen; Du, Xiao-Ying; Wang, Hongbo; Gao, Weidong

doi:10.2298/tsci1603999f

THERM SCI

2016

DOI: 10.2298/tsci1603999f

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High-temperature heating and microwave pretreatments: A new light in bamboo's enzymatic hydrolysis

Jiajia Fu

Li Yu

Zhang Qun

et al.

Abstract: Orig i nal sci en tific pa per

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Cited by 3 publications

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“…28,29 Cellulase, xylanase, pectinase, and mannanase are able to hydrolyze bamboo powders. 30,31 In addition, the reducing sugar yield and enzymes absorbed on the surface of bamboo were enhanced by using different pre-treatments, including a mild chemical oxidant, 31 high-temperature heating, 32,33 microwave treatment, 33 and ultrasonic treatment. 34 Enzymatic treatments on bamboo effectively removed non-cellulosic materials; however, to the best of the researchers’ knowledge, no studies have investigated which enzyme activities are primarily required in retting.…”

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Evaluation of bamboo water-retting for fiber bundle extraction

Liu

Wang

et al. 2021

Textile Research Journal

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Bamboo fiber bundles were successfully extracted from bamboo culms using water-retting, taking advantage of enzymes secreted by microorganisms in the retting liquid. The harvest year and place of origin of the bamboo and the source of water impacted the products of the retting process. One-month-old bamboo was decomposed completely, whereas the one-year-old sample was hardly changed after 24-day retting. Moisture regain and crystallinity varied with the different origins of the bamboo. However, all samples resulted in similar chemical structures and thermal properties. The best operational conditions for water-retting were 3-month-old bamboo from Wuxi incubated in deionized water. Enzyme activities, including cellulase, xylanase, pectinase, and ligninolytic enzymes (lignin peroxidase, manganese peroxidase, and laccase) were monitored during a 24-day retting. Manganese peroxidase was the primary enzyme used to degrade lignin, resulting in absorbance at 294 nm of UV-Vis spectra. In addition, xylanase played a leading role in hydrolyzing hemicellulose, which was consistent with the change in reducing sugar yield. In addition, variations in dissolved oxygen and pH values were also recorded, indicating the changes in bacterial strains and the enzymatic system. The wastewater from bamboo retting showed good biodegradability but a lack of nitrogen and phosphorus. Overall, a manganese peroxidase–xylanase combined enzyme-retting treatment would offer a more environmentally friendly approach for extracting bamboo fibers.

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confidence: 99%

Evaluation of bamboo water-retting for fiber bundle extraction

Liu

Wang

et al. 2021

Textile Research Journal

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Microwave-vacuum drying of round bamboo: A study of the physical properties

Ma²,

Zhang

et al. 2019

Construction and Building Materials

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Effects of Different Drying Methods on Bamboo's Physical and Mechanical Properties

Lv¹,

Chen

Ma³

et al. 2018

Forest Products Journal

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In this work, a comparative study on microwave–vacuum-drying (MVD) and hot-air-drying (HAD) of bamboo culms was conducted. Related physical and mechanical properties of bamboo culms were investigated. MVD results showed no drying defects of bamboo culms. Compared with that of the HAD method, the drying time of MVD was reduced. The shrinkage of both bamboo culm diameter and wall thickness increased with drying time. The crystallinity was changed with drying time between MVD and HAD. The CIELAB color system (L*, a*, b*) was used for analyzing bamboo color changes. All the values of L*, a*, and b* were increased after MVD, which caused the bamboo culms to become golden yellow. However, after HAD, L*, a*, and b* decreased and samples became brown. The mechanical properties of samples were improved after MVD, and did not show any significant changes after HAD. The pore structure after MVD showed higher adsorption capacity, higher specific surface area, and greater volume compared with HAD. Therefore, taking into consideration the dried product quality and short drying time, MVD provides a potential method for drying bamboo.

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High-temperature heating and microwave pretreatments: A new light in bamboo's enzymatic hydrolysis

Abstract: Orig i nal sci en tific pa per

Cited by 3 publications

References 3 publications

Evaluation of bamboo water-retting for fiber bundle extraction

Evaluation of bamboo water-retting for fiber bundle extraction

Microwave-vacuum drying of round bamboo: A study of the physical properties

Effects of Different Drying Methods on Bamboo's Physical and Mechanical Properties

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