A comparative study on enzymatic hydrolysis of kenaf from two different harvest time-points, with- and without pretreatment

Wi, Seung Gon; Kim, Su-Bae; Lee, Dae-Seok; Kim, Ho Myeong; Bae, Hyeun‐Jong

doi:10.1016/j.indcrop.2015.06.054

Cited by 12 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in agreement with some hemicelluloses being removed during pretreatment, and only a small amount of xylose remained in enzymatic hydrolysis residue, as shown in Tables and . Compared with the raw material and pretreated solid, the bond at 1510 cm −1 , which has been defined as the characteristic bond of the aromatic ring of lignin, in the enzymatic hydrolysis residue was obviously enhanced. This indicates that lignin is the major chemical composition of enzymatic hydrolysis residue.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of enzymatic saccharification of bagasse by ethanol-based organosolv auto-catalyzed pretreatment

Wei

2016

J. Chem. Technol. Biotechnol

View full text Add to dashboard Cite

BACKGROUND Bagasse, a kind of agricultural residue having high sugar content, has been considered a promising feedstock to produce bio‐ethanol. However, the natural structure of bagasse makes it difficult to use this material to produce bio‐ethanol directly. Efficient pretreatment is necessary to break down the natural sealed structure of bagasse and sequential enzymatic hydrolysis can release maximum sugars. RESULTS In order to enhance sugar recovery from bagasse, ethanol‐based organosolv auto‐catalyzed pretreatment followed by enzyme hydrolysis was investigated in this study. The maximum xylose recovery from the prehydrolysate was 10.31 g per 100 g bagasse, and among them 78.08% existed in the form of xylo‐oligosaccharides. The highest glucose recovery in the enzymatic hydrolysate was 40.29 g per 100 g bagasse, representing 92.20% of glucose in the bagasse material. In terms of total sugars (combined xylose and glucose both in prehydrolysate and enzymatic hydrolysate), 56.98 g per 100 g bagasse, representing 83.67% of the total sugars in the bagasse biomass were obtained at 195 °C for 30 min with 40% ethanol. Corresponding concentrations of 5‐HMF, and furfural in the prehydrolysate were only 0.32 and 0.97 g L−1, respectively, which indicated that detoxification may not be required in the next fermentation step. Besides the sugars, about 84.27% of lignin in the bagasse material can also be recovered in the form of ethanol–lignin or enzymatic hydrolysis lignin. CONCLUSIONS Ethanol‐based organosolv auto‐catalyzed pretreatment could enhance the enzymatic digestibility of bagasse due to the removal of hemicelluloses and lignin, to finally realize high sugar recovery from bagasse. © 2016 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

Enhancement of enzymatic saccharification of bagasse by ethanol-based organosolv auto-catalyzed pretreatment

Wei

2016

J. Chem. Technol. Biotechnol

View full text Add to dashboard Cite

show abstract

“…Compared with other natural fiber materials, kenaf is relatively commercially available and economically cheap for many varied applications, i.e., textiles, pulps, fabrics, building materials, biocomposites, bedding, and oil absorbing materials; it has a short plantation cycle and great flexibility in changing environmental conditions (Saba et al 2015a;Saba et al 2015b;Wi et al 2015). Kenaf fiber is an alternative source of energy and material because of its biocompatibility, biodegradability, and excellent capability of moisture-absorption and moisture-desorption (Wang and Ramaswamy 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Zhang¹,

Han²,

Jiang³

et al. 2016

BioResources

View full text Add to dashboard Cite

The chemical and structural properties of kenaf fibers that were treated at different steam pressures during the steam explosion process were investigated. With increased steam pressure, a higher percentage of cellulose and acid-insoluble lignin and a lower content of hemicellulose and pectin were obtained. This result was further confirmed by Fourier transform infrared (FTIR) spectroscopy. X-ray diffraction (XRD) studies revealed that the steam-exploded kenaf fibers were more crystalline than the raw kenaf fibers, and that excessive steam pressure above 3 MPa damaged the cellulose crystalline structure. Scanning electron microscopy (SEM) analysis showed a change in the surface morphology of the treated kenaf fibers. The lower content of gums and the effective defibrillation of steam-exploded kenaf fibers demonstrated the potential of steam explosion treatment in applications of kenaf fibers.

show abstract

“…Furthermore, the chemical composition of biomass varies according to developmental stage [8, 24]. We analyzed samples collected from 2-month-old to 3-year-old bamboo stems at three different heights above ground level (1, 6, and 11 m) based on enzymatic hydrolysis data (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The chemical composition of biomass is highly important in terms of bio-based application and variation in the relative proportions of different chemicals can influence bioenergy yield [ 23 ]. Furthermore, the chemical composition of biomass varies according to developmental stage [ 8 , 24 ]. We analyzed samples collected from 2-month-old to 3-year-old bamboo stems at three different heights above ground level (1, 6, and 11 m) based on enzymatic hydrolysis data (Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of biomass quality in short-rotation bamboo (Phyllostachys pubescens) for bioenergy products

Lee

Nguyễn

et al. 2017

Biotechnol Biofuels

Self Cite

View full text Add to dashboard Cite

BackgroundIn order to improve the availability of biomass, the concept of growing high yield biomass with short rotations and intensive culture has been introduced. Bamboo has become a feedstock of potential interest for future energy production due to its high productivity and short rotation time. The growth age of biomass is an important factor affecting the efficiency of bioconversion and pretreatment for bioenergy production. In this regard, more information is required on the morphology and chemical composition of bamboo for short-rotation biomass production. In this study, we used a compositional assay to compare a bamboo of two different growth ages.ResultsBamboo of two different ages showed characteristics patterns of morphology, chemical composition, and bioconversion. In young-age (2-month-old) bamboo, the pattern of tissue organization was similar to that of old-age (3-year-old) bamboo, indicating that the former had reached its full height. There were significant differences between young-age and old-age bamboo in terms of chemical composition. The glucose contents in old-age bamboo did not differ significantly among its internodes. For young-age bamboo, the lignin contents were 14.6–18.3%, whereas those of old-age bamboo were considerably higher, ranging from 25.4 to 27.1% with increasing syringyl-to-guaiacyl ratio. The yield of total sugars following enzymatic hydrolysis of young-age bamboo was approximately eight times. However, following hydrogen peroxide–acetic acid pretreatment, the results of separate hydrolysis and fermentation and simultaneous saccharification and fermentation did not differ significantly between young- and old-age bamboo. However, ethanol production was higher in 2-month old than in 3-year old from initial raw biomass.ConclusionOur data show that the production of total sugar from raw material was high in young bamboo with low lignin content. With respect to short-rotation biomass, bamboo culm harvested after termination of height growth is more appropriate for use as a biomass resource to achieve a high yield for bioconversion process.

show abstract

A comparative study on enzymatic hydrolysis of kenaf from two different harvest time-points, with- and without pretreatment

Cited by 12 publications

References 34 publications

Enhancement of enzymatic saccharification of bagasse by ethanol-based organosolv auto-catalyzed pretreatment

Enhancement of enzymatic saccharification of bagasse by ethanol-based organosolv auto-catalyzed pretreatment

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Evaluation of biomass quality in short-rotation bamboo (Phyllostachys pubescens) for bioenergy products

Contact Info

Product

Resources

About