Xylitol production from corn fiber and sugarcane bagasse hydrolysates by Candida tropicalis

Rao, R. Srinivasa; Jyothi, Ch.; Prakasham, R. S.; Sarma, P.N.; Rao, L. Venkateswar

doi:10.1016/j.biortech.2005.08.015

Cited by 184 publications

(101 citation statements)

References 25 publications

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“…This is in accordance with [17,22]. By means of the TableCurve 3D software, Equation (6) Figure 4 shows the interaction between the initial yeast concentration C and temperature in the kinetic constant values estimated by the model of Equation (6).…”

Section: Kinetic Parameters Determinationsupporting

confidence: 76%

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Modeling of Production and Quality of Bioethanol Obtained from Sugarcane Fermentation Using Direct Dissolved Sugars Measurements

et al. 2016

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Bioethanol production from sugarcane represents an opportunity for urban-agricultural development in small communities of Ecuador. Despite the fact that the industry for bioethanol production from sugarcane in Brazil is fully developed, it is still considered expensive as a small rural business. In order to be able to reduce the costs of monitoring the production process, and avoid the application of expensive sensors, the aim of this research was modeling the kinetics of production of bioethanol based on direct measurements of Brix grades, instead of the concentration of alcohol, during the process of cane juice bio-fermentation with Saccharomyces cerevisiae. This avoids the application of expensive sensors that increase the investment costs. Fermentation experiments with three concentrations of yeast and two temperatures were carried out in a laboratory reactor. In each case Brix grades, amount of ethanol and alcoholic degree were measured. A mathematical model to predict the quality and production of bioethanol was developed from Brix grade measurements, obtaining an adjusted coefficient of determination of 0.97. The model was validated in a pilot plant.

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Section: Kinetic Parameters Determinationsupporting

confidence: 76%

“…[12,13]. Although already developed, these alternatives for monitoring and controlling fermentation processes are still not widely accessible to the Ecuadorian artisanal ethanol industry [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Production and Quality of Bioethanol Obtained from Sugarcane Fermentation Using Direct Dissolved Sugars Measurements

et al. 2016

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“…Xylose metabolic pathway is therefore well developed in microorganisms that live on decaying plant materials, including most strains of yeasts such as Pichia stiptis [21], Candida tropicalis [22], Candida shehatae [23] and H. anomala used in this study. The metabolism of xylose in yeasts has been described in detail in the literature [24-27].…”

Section: Resultsmentioning

confidence: 99%

A novel method to prepare L-Arabinose from xylose mother liquor by yeast-mediated biopurification

Cheng

Wang

et al. 2011

Microb Cell Fact

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BackgroundL-arabinose is an important intermediate for anti-virus drug synthesis and has also been used in food additives for diets-controlling in recent years. Commercial production of L-arabinose is a complex progress consisting of acid hydrolysis of gum arabic, followed by multiple procedures of purification, thus making high production cost. Therefore, there is a biotechnological and commercial interest in the development of new cost-effective and high-performance methods for obtaining high purity grade L-arabinose.ResultsAn alternative, economical method for purifying L-arabinose from xylose mother liquor was developed in this study. After screening 306 yeast strains, a strain of Pichia anomala Y161 was selected as it could effectively metabolize other sugars but not L-arabinose. Fermentation in a medium containing xylose mother liquor permitted enrichment of L-arabinose by a significant depletion of other sugars. Biochemical analysis of this yeast strain confirmed that its poor capacity for utilizing L-arabinose was due to low activities of the enzymes required for the metabolism of this sugar. Response surface methodology was employed for optimization the fermentation conditions in shake flask cultures. The optimum conditions were: 75 h fermentation time, at 32.5°C, in a medium containing 21% (v/v) xylose mother liquor. Under these conditions, the highest purity of L-arabinose reached was 86.1% of total sugar, facilitating recovery of white crystalline L-arabinose from the fermentation medium by simple methods.ConclusionYeast-mediated biopurification provides a dynamic method to prepare high purity of L-arabinose from the feedstock solution xylose mother liqour, with cost-effective and high-performance properties.

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“…Based on the results of the characterization, the pollutant mean for O&G during pre soak (79.0 ± 1.10 mg/L), wash (50.0 ± 0.38 mg/L) and rinse (18.0 ± 1.26 mg/L) does not meet with standard B regulation. However, the higher concentration was generated by the pre soak process since it was washed away together with the crude oil and lubricating oil comes from motor oil of car wash stations or might the leaking of engine parts resulting high amount of O&G were detected [10]. 05008-p.5…”

Section: Iconcees 2015mentioning

confidence: 99%

Pollutants Characterization of Car Wash Wastewater

Hashim

Zayadi

2016

MATEC Web of Conferences

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Abstract. The huge quantity of water consumed per car during washing cars yields the untreated effluents discharged to the stormwater system. Wastewater samples from snow car wash and two full hand service car wash station were analyzed for pH and the presence of PO4 3-,TP, O&G, alkalinity, TSS, NO3 -, NO2 -, COD and surfactant in accordance Standard Method of Water and Wastewater 2012. Two full hand wash service stations and one station of snow foam service were investigated in this study. Amongst the stations, snow foam car wash station indicates the highest concentration of PO4 3-, TP, O&G, TSS, COD and surfactant with the average value of 10.18 ± 0.87 mg/L, 30.93 ± 0.31 mg/L , 85.00 ± 0.64 mg/L 325.0 ± 0.6 mg/L, 485.0 ± 0.3 mg/L and 54.00 ± 2.50 mg/L as MBAS, respectively. Whereas, in parameters characterization in different stages throughout the car wash process, O&G was found to be the highest in pre soak stage, PO4 3-, TP, TSS and COD in washing stage and NO3 -and NO2 -in rinse stage. All parameters were compared to Environmental Quality (Industrial Effluent) Regulations, 2009. There is a strong need to study on the characterization of car wash water in order to suggest the suitable treatment need for this type of wastewater.

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Xylitol production from corn fiber and sugarcane bagasse hydrolysates by Candida tropicalis

Cited by 184 publications

References 25 publications

Modeling of Production and Quality of Bioethanol Obtained from Sugarcane Fermentation Using Direct Dissolved Sugars Measurements

Modeling of Production and Quality of Bioethanol Obtained from Sugarcane Fermentation Using Direct Dissolved Sugars Measurements

A novel method to prepare L-Arabinose from xylose mother liquor by yeast-mediated biopurification

Pollutants Characterization of Car Wash Wastewater

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