Improvement of sugar recovery from Sida acuta (Thailand Weed) by NaOH pretreatment and application to bioethanol production

Premjet, Siripong; Doungporn, Premjet; Yoo, Hah Young; Kim, Seung Wook

doi:10.1007/s11814-018-0170-1

Cited by 29 publications

(25 citation statements)

References 45 publications

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“…Carbon and nitrogen sources play an important role because these components are directly related to cell growth and metabolic biosynthesis. In addition, there have been reports on the use of low-cost biomass for economical production of high value-added materials (biorefinery) in bioindustry [13,14,15,16,17,18]. However, the study of the effects of nutritional requirement of C. militaris on cordycepin synthesis is still in the basic stages of research.…”

Section: Introductionmentioning

confidence: 99%

Improved Cordycepin Production by Cordyceps militaris KYL05 Using Casein Hydrolysate in Submerged Conditions

Lee

Kim

et al. 2019

Biomolecules

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Cordycepin, a beneficial bioactive product specifically found in Cordyceps, has received attention in various bioindustrial applications such as in pharmaceuticals, functional foods, and cosmetics, due to its significant functions. However, low productivity of cordycepin is a barrier to commercialization. In this study, Cordyceps militaris was mutated by UV irradiation to improve the cordycepin production. The highest producer KYL05 strain was finally selected and its cordycepin production was increased about 1.5-fold compared to wild type. In addition, the effects of culture conditions were fundamentally investigated. Optimal conditions were as follows: pH 6, temperature of 25 °C, shaking speed of 150 rpm, and culture time of 6 days. Effects of medium component on cordycepin production were also investigated by using various carbon and nitrogen sources. It was found that glucose and casein hydrolysate (CH) were most effective as carbon and nitrogen sources in cordycepin production (2.3-fold improvement) with maximum cordycepin production of about 445 mg/L. In particular, production was significantly affected by CH. These results should be of value in improving the efficiency of mass production of cordycepin.

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Section: Introductionmentioning

confidence: 99%

Improved Cordycepin Production by Cordyceps militaris KYL05 Using Casein Hydrolysate in Submerged Conditions

Lee

Kim

et al. 2019

Biomolecules

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“…Maximum glucose recovery of 30.7% was observed at this condition. The highest hydrolysis efficiency of 90.0% was also obtained at this condition, which is higher than that of other lignocellulosic biomass that was pretreated with NaOH, including rice straw (78.7%) [40], Phoenix canariensis (87.0%), Opuntia ficus-indic (84.5%) [30], and S. acuta (82.8%) [41]. It is also obvious from this study that a threshold lignin removal of 71% (Figure 2) in C. barbata at the optimum pretreatment condition, among other factors, is enough to allow for cellulolytic enzymes to infiltrate the cell wall.…”

Section: Resultsmentioning

confidence: 99%

Combining Autoclaving with Mild Alkaline Solution as a Pretreatment Technique to Enhance Glucose Recovery from the Invasive Weed Chloris barbata

Obeng

Premjet

2019

Biomolecules

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Developing an optimum pretreatment condition to enhance glucose recovery assessed the potential of Chloris barbata, which is a common invasive weed in Thailand, as a feedstock for bioethanol production. Chloris barbata was exposed to autoclave-assisted alkaline pretreatment by using different sodium hydroxide (NaOH) concentrations (1% to 4%) and heat intensities (110 °C to 130 °C) that were dissipated from autoclaving. The optimum condition for pretreatment was determined to be 2% NaOH at 110 °C for 60 min. At this condition, maximum hydrolysis efficiency (90.0%) and glucose recovery (30.7%), as compared to those of raw C. barbata (15.15% and 6.20%, respectively), were observed. Evaluation of glucose production from 1000 g of C. barbata based on material balance analysis revealed an estimated yield of 304 g after pretreatment at the optimum condition when compared to that of raw C. barbata (61 g), an increase of five-fold. Structural analysis by the scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed the disruption of the intact structure of C. barbata and an increase in the cellulose crystallinity index (CrI), respectively. The results from this study demonstrate the efficiency of using C. barbata as a potential feedstock for bioethanol production.

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“…Lignocellulosic biomass, one of the most earth‐abundant materials that can be obtained as agricultural, forest, and industrial residues, has a carbohydrate (mainly cellulose, hemicellulose, and lignin) content of ~70 wt% and contains fermentable sugar, therefore being a cost‐effective fermentation feedstock for the production of value‐added products such as biofuel, biochemicals, biomaterials, and enzymes (Banerjee et al, 2019; Lien et al, 2019; Park et al, 2018; Siripong et al, 2018). Efficient utilization of lignocellulosic biomass requires enzymatic saccharification to obtain fermentable sugars.…”

Section: Introductionmentioning

confidence: 99%

Improved production of bacterial cellulose through investigation of effects of inhibitory compounds from lignocellulosic hydrolysates

et al. 2021

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Although the unique nanostructure of bacterial cellulose (BC) imparts superior mechanochemical properties and thus allows for diverse applications, the high production cost of BC necessitates the development of more cost‐effective solutions, for example, those using lignocellulosic biomass as a substrate and relying on its pretreatment and saccharification to generate fermentable sugars. However, the various species (e.g., aliphatic acids, furans, and phenolics) produced during pretreatment may interfere with bacterial cell growth and BC production. Herein, we investigated the effects of aliphatic (acetic and formic) acids, furans (5‐hydroxymethylfurfural [5‐HMF] and furfural), and phenolics (syringaldehyde and p‐coumaric acid) on the production of BC. This production was enhanced at low aliphatic acid concentrations (1 g/L acetic acid and 0.5 g/L formic acid) but was suppressed by at least 90% in cases of 0.75 g/L formic acid, 0.4 g/L furfural, 4 g/L 5‐HMF, 2.5 g/L syringaldehyde, and 2.5 g/L p‐coumaric acid. BC production efficiencies of 97.86%, 76.66%, and 73.50% were observed for Miscanthus, barley straw, and pine tree hydrolysates, respectively, under optimal conditions. Therefore, these results provided the possibility to utilize the most abundant and sustainable lignocellulose on the planet for BC production.

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Improvement of sugar recovery from Sida acuta (Thailand Weed) by NaOH pretreatment and application to bioethanol production

Cited by 29 publications

References 45 publications

Improved Cordycepin Production by Cordyceps militaris KYL05 Using Casein Hydrolysate in Submerged Conditions

Improved Cordycepin Production by Cordyceps militaris KYL05 Using Casein Hydrolysate in Submerged Conditions

Combining Autoclaving with Mild Alkaline Solution as a Pretreatment Technique to Enhance Glucose Recovery from the Invasive Weed Chloris barbata

Improved production of bacterial cellulose through investigation of effects of inhibitory compounds from lignocellulosic hydrolysates

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