Production of ethanol from waste paper using immobilized yeasts

Zichová, Miroslava; Stratilová, Eva; Omelková, Jiřina; Vadkertiová, Renáta; Babák, Libor; Rosenberg, Michal

doi:10.1007/s11696-016-0036-0

Cited by 8 publications

(6 citation statements)

References 52 publications

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“…The bioethanol production, substrate type, pretreatment method, hydrolysis method and fermentation process conditions was compared to the previous studies Table 1. The bioethanol yield obtained in this study was similar to previous studies [6,8,25]. The variations in the results with different studies are likely due to the different pretreatment, hydrolysis and fermentation methods used in the bioethanol production [26,27].…”

Section: Fermentation Of Waste Paper Hydrolysatesupporting

confidence: 85%

“…Increasing energy costs together with increasing concerns about global warming related to CO 2 emissions and the decrease of landfill locations for disposal of solid waste resulted in increasing interest in alternative, low and non-carbon based energy sources [1][2][3][4]. Lignocellulosic are the most abundant biomass available on earth, comprising mainly of cellulose and hemicellulose [5,6]. Among various lignocellulosic, waste paper could be used as an excellent source for bioethanol production; it is abundant, low cost with high amount of cellulose and does not require energy-intense thermophysical or severe strong acid pretreatments prior to enzymatic hydrolysis generally used in hydrolysis of lignocellulose substrates [3,7].…”

Section: Introductionmentioning

confidence: 99%

“…There for no net CO 2 is added to the atmosphere, making bioethanol an environmentally valuable energy source [2,8,9]. Previous researches have demonstrated the potential of bioethanol production from waste paper using a variety of process designs [6,[10][11][12][13][14]. Currently, the technology for lignocellulosic bioethanol production relies mainly on pretreatment, hydrolysis and fermentation [15].…”

Section: Introductionmentioning

confidence: 99%

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Treatment of Waste Paper Using Ultrasound and Sodium Hydroxide for Bioethanol Production

Saeed¹,

Abdulkareem²,

Muallah³

2018

JoBRC

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Bioethanol produced from lignocellulose feedstock is a renewable substitute to declining fossil fuels. Pretreatment using ultrasound assisted alkaline was investigated to enhance the enzyme digestibility of waste paper. The pretreatment was conducted over a wide range of conditions including waste paper concentrations of 1-5%, reaction time of 10-30 min and temperatures of 30-70°C. The optimum conditions were 4 % substrate loading with 25 min treatment time at 60°C where maximum reducing sugar obtained was 1.89 g/L. Hydrolysis process was conducted with a crude cellulolytic enzymes produced by Cellulomonas uda (PTCC 1259).The maximum amount of sugar released and hydrolysis efficiency were 20.92 g/L and 78.4 %, respectively. Sugars released from waste paper were fermented into bioethanol with Saccharomyces cerevisiae. The maximum concentration of bioethanol estimated was 9.5 g/L after 48h of cultivation, the yield and volumetric productivity were 0.454 g/g glucose and 0.2g bioethanol/ L h. respectively. This study of ultrasound and sodium hydroxide treatment may be (we think) it will be a promising technique to develop bioethanol production from waste paper.

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Section: Fermentation Of Waste Paper Hydrolysatesupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Treatment of Waste Paper Using Ultrasound and Sodium Hydroxide for Bioethanol Production

Saeed¹,

Abdulkareem²,

Muallah³

2018

JoBRC

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“…Lignocellulosic materials, such as loofa sponge (Luffa cylindrica), corncob, sugarcane bagasse and coconut bract, have advantages of cost reduction, ease of immobilization, availability, reusability, higher stability and durability when compared to entrapment beads. These materials have been widely utilized for immobilization [11][12][13][14]. S. cerevisiae is the most widely studied and applied microorganism for ethanol production due to its robustness and other good physiological characteristics when compared to filamentous fungi, bacteria and other yeasts [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effects of various inhibitory substances and immobilization on ethanol production efficiency of a thermotolerant Pichia kudriavzevii

Ndubuisi

Qin

Liao

et al. 2020

Biotechnol Biofuels

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Background Although bioethanol production has been gaining worldwide attention as an alternative to fossil fuel, ethanol productivities and yields are still limited due to the susceptibility of fermentation microorganisms to various stress and inhibitory substances. There is therefore an unmet need to search for multi-stress-tolerant organisms to improve ethanol productivity and reduce production cost, particularly when lignocellulosic hydrolysates are used as the feedstock. Results Here, we have characterized a previously isolated Pichia kudriavzevii LC375240 strain which is thermotolerant to high temperatures of 37 °C and 42 °C. More excitingly, growth and ethanol productivity of this strain exhibit strong tolerance to multiple stresses such as acetic acid, furfural, formic acid, H2O2 and high concentration of ethanol at 42 °C. In addition, simple immobilization of LC375240 on corncobs resulted to a more stable and higher efficient ethanol production for successive four cycles of repeated batch fermentation at 42 °C. Conclusion The feature of being thermotolerant and multi-stress-tolerant is unique to P. kudriavzevii LC375240 and makes it a good candidate for second-generation bioethanol fermentation as well as for investigating the molecular basis underlying the robust stress tolerance. Immobilization of P. kudriavzevii LC375240 on corncobs is another option for cheap and high ethanol productivity.

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“…Operating costs, material stability, product quality, legality, and safety must be considered before using cell carriers 41,42 . Among the production systems that have been investigated, sodium alginate, polyvinyl alcohol (PVA) hydrogel, and lens‐shaped particles (Lentikats®) seem to meet the above requirements and lead to improved ethanol yields or usability / reusability after long periods 43,44 . Research on yeast immobilization for cellulosic ethanol has been increasing over the last 10 years, 37,45,46 and future research should be geared towards developing resistant, economical, and abundant carriers to support their implementation in the biofuel industry.…”

Section: Cell Carriers and Yeast Selection For Production Of 2g Bioethanolmentioning

confidence: 99%

Yeast immobilization systems for second‐generation ethanol production: actual trends and future perspectives

Chacón-Navarrete

Martı́n

Moreno-García

2021

Biofuels Bioprod Bioref

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Yeast immobilization with low‐cost carrier materials is a suitable strategy to optimize the fermentation of lignocellulosic hydrolysates for the production of second‐generation (2G) ethanol. It is defined as the physical confinement of intact cells to a certain region of space (the carrier) with the preservation of their biological activity. This technological approach facilitates promising strategies for second‐generation bioethanol production due to the enhancement of the fermentation performance that is expected to be achieved. Using immobilized cells, the resistance to inhibitors contained in the hydrolysates and the co‐utilization of sugars are improved, along with facilitating separation operations and the reuse of yeast in new production cycles. Until now, the most common immobilization technology used calcium alginate as a yeast carrier but other supports such as biochar or multispecies biofilm membranes have emerged as interesting alternatives. This review compiles updated information about cell carriers and yeast‐cell requirements for immobilization, and the benefits and drawbacks of different immobilization systems for second‐generation bioethanol production are investigated and compared.

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Production of ethanol from waste paper using immobilized yeasts

Cited by 8 publications

References 52 publications

Treatment of Waste Paper Using Ultrasound and Sodium Hydroxide for Bioethanol Production

Treatment of Waste Paper Using Ultrasound and Sodium Hydroxide for Bioethanol Production

Effects of various inhibitory substances and immobilization on ethanol production efficiency of a thermotolerant Pichia kudriavzevii

Yeast immobilization systems for second‐generation ethanol production: actual trends and future perspectives

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