scholarly journals Bioethanol Production from Paper Fibre Residue Using Diluted Alkali Hydrolysis and the Fermentation Process

2011 ◽  
Vol 8 (4) ◽  
pp. 1951-1957 ◽  
Author(s):  
G. Sathya Geetha ◽  
A. Navaneetha Gopalakrishnan
Keyword(s):  
Reaction Time ◽  
Penicillium Chrysogenum ◽  
Ethanol Concentration ◽  
Ethanol Yield ◽  
Bioethanol Production ◽  
Time Period ◽  
Hydrolysis Of Cellulose ◽  
Alkali Hydrolysis ◽  
Hydrolysis Of ◽  
State Of Art

The state of art for the bioethanol production from paper fibre residue using diluted alkali hydrolysis and fermentation processes was evaluated. Hydrolysis of paper fibre residue with diluted sodium hydroxide at various time period, temperature and concentration were investigated. The paper fibre residue was pre-steamed, impregnated with diluted NaOH (0 to 25%) and subsequently hydrolyzed in a reactor at temperatures that ranged between 30 to 50oC, for reaction time between 30 minutes to 150 minutes. The highest yield of monosaccharide (indicating the efficient hydrolysis of cellulose and hemi cellulose) was found at a temperature of 35oC for a reaction time of 90 minutes. Fermentability of hemicelluloses hydrolysate was tested using monosaccharide fermenting microorganismPenicillium chrysogenumandSaccharomyces cereviacea. The fermentability of the hydrolysate decreased strongly for hydrolysate produced at temperature higher than 50oC. The ethanol concentration of monosaccharide hydrolysate was found to be 34.06 g/L and the ethanol yield was 0.097 g/g.

Role and significance of beta-glucosidases in the hydrolysis of cellulose for bioethanol production

2013 ◽  
Vol 127 ◽  
pp. 500-507 ◽  
Author(s):  
Reeta Rani Singhania ◽  
Anil Kumar Patel ◽  
Rajeev K. Sukumaran ◽  
Christian Larroche ◽  
Ashok Pandey
Keyword(s):  
Bioethanol Production ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

scholarly journals Enhanced microbial degradation of irradiated cellulose under hyperalkaline conditions

2020 ◽  
Vol 96 (7) ◽  
Author(s):  
Naji M Bassil ◽  
Joe S Small ◽  
Jonathan R Lloyd
Keyword(s):  
Microbial Degradation ◽  
Degradation Products ◽  
Hydrolysis Product ◽  
Hydrogen Gas ◽  
Cellulose Fibres ◽  
Production Of Hydrogen ◽  
Hydrolysis Of Cellulose ◽  
Alkali Hydrolysis ◽  
Intermediate Level Radioactive Waste ◽  
Hydrolysis Of

ABSTRACT Intermediate-level radioactive waste includes cellulosic materials, which under the hyperalkaline conditions expected in a cementitious geological disposal facility (GDF) will undergo abiotic hydrolysis forming a variety of soluble organic species. Isosaccharinic acid (ISA) is a notable hydrolysis product, being a strong metal complexant that may enhance the transport of radionuclides to the biosphere. This study showed that irradiation with 1 MGy of γ-radiation under hyperalkaline conditions enhanced the rate of ISA production from the alkali hydrolysis of cellulose, indicating that radionuclide mobilisation to the biosphere may occur faster than previously anticipated. However, irradiation also made the cellulose fibres more available for microbial degradation and fermentation of the degradation products, producing acidity that inhibited ISA production via alkali hydrolysis. The production of hydrogen gas as a fermentation product was noted, and this was associated with a substantial increase in the relative abundance of hydrogen-oxidising bacteria. Taken together, these results expand our conceptual understanding of the mechanisms involved in ISA production, accumulation and biodegradation in a biogeochemically active cementitious GDF.

Efficient Hydrolytic Breakage of β-1,4-Glycosidic Bond Catalyzed by a Difunctional Magnetic Nanocatalyst

2018 ◽  
Vol 71 (8) ◽  
pp. 559 ◽  
Author(s):  
Ren-Qiang Yang ◽  
Ni Zhang ◽  
Xiang-Guang Meng ◽  
Xiao-Hong Liao ◽  
Lu Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Microcrystalline Cellulose ◽  
Significant Loss ◽  
Reducing Sugar ◽  
Magnetic Nanocatalyst ◽  
Efficient Catalyst ◽  
Glycosidic Bonds ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

A novel difunctional magnetic nanocatalyst (DMNC) was prepared and used to catalyse the hydrolytic breakage of β-1,4-glycosidic bonds. The functional nanoparticle displayed excellent catalytic activity for hydrolysis of cellobiose to glucose under moderate conditions. The conversion of cellobiose and yield of glucose could reach 95.3 and 91.1 %, respectively, for a reaction time of 6 h at pH 4.0 and 130°C. DMNC was also an efficient catalyst for the hydrolysis of cellulose: 53.9 % microcrystalline cellulose was hydrolyzed, and 45.7 % reducing sugar was obtained at pH 4.0 and 130°C after 10 h. The magnetic catalyst could be recycled and reused five times without significant loss of catalytic activity.

scholarly journals BIOETHANOL PRODUCTION FROM COCONUT HUSK USING THE WET GAMMA IRADIATION METHOD

2021 ◽  
Vol 14 (2) ◽  
pp. 43
Author(s):  
Putra Oktavianto ◽  
Risdiyana Setiawan ◽  
Ilhami Ariyanti ◽  
Muhammad Fadhil Jamil
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Cellulose Hydrolysis ◽  
Raw Material ◽  
Bioethanol Production ◽  
Coconut Husk ◽  
Hydrolysis Process ◽  
Hydrolysis Of Cellulose ◽  
Ethanol Ethanol ◽  
Hydrolysis Of ◽  
Low Dosage

BIOETHANOL PRODUCTION FROM COCONUT HUSK USING the WET GAMMA IRRADIATION METHOD. The use of coconut husk has only been used as a material for making handicrafts such as ropes, brooms, mats, and others or just burned. The combustion of coconut husk can cause air pollution. In fact, coconut husk can be used as a raw material for bioethanol production so that the beneficial value of coconut husk will also increase. One way of bioethanol production from coconut husk is by irradiating the coconut husk. The coconut husk irradiation technique to be carried out in this study is the wet irradiation technique. Wet irradiation is carried out to accelerate the process of bioethanol production because at the time of irradiation, cellulose has been hydrolyzed and glucose has been formed so that it is more efficient in time and use of the material so that the cellulose hydrolysis process is not necessary. The coconut husk samples were wet because they were mixed with 4% NaOH and were irradiated using a gamma irradiator from STTN-BATAN Yogyakarta with a dose of 30 kGy and 50 kGy and 0 kGy (or without irradiation). Then the sample is fermented with the fungus Saccharomyces Cerevisiae from tape yeast to form ethanol. Ethanol is purified and then analyzed for concentrations using pycnometric and refractometric methods. The result is that the highest ethanol content is without irradiation (0 kGy), this is due to the low dosage used. However, the main point in this wet method research is evidence of hydrolysis of cellulose by the formation of gluoxane after irradiated wet coconut husk, and with Fehling A and B analysis, brown deposits are seen proving that glucose has been formed.

Bioconversion of Water Hyacinth to Ethanol by Using Cellulase from Trichoderma atroviride AD-130

2014 ◽  
Vol 918 ◽  
pp. 145-148
Author(s):  
Rajesh Dhankhar ◽  
Anil Dhaka ◽  
Sakshi
Keyword(s):  
Water Hyacinth ◽  
Reducing Sugars ◽  
Ethanol Concentration ◽  
Ethanol Yield ◽  
Bioethanol Production ◽  
Trichoderma Atroviride ◽  
Carbohydrate Source ◽  
Suitable Alternative ◽  
Enzymatic Hydrolysate ◽  
Peg 6000

The Present study showed that water hyacinth could be used as a suitable alternative cheaper carbohydrate source for bioethanol production. Crude cellulase and β-glucosidase were produced by using fungi Trichoderma atroviride AD-130. Highest yield of reducing sugars (451.13 g/L) was obtained from acid pretreated water hyacinth supplemented with 0.1% PEG-6000. The highest ethanol concentration (16.43 g/L) from enzymatic hydrolysate of substrate was achieved with a corresponding ethanol yield of 0.28 g/g sugar.

scholarly journals Simultaneous Sachharification and Fermentation of Rice Residues and its Comparative Analysis for Bioethanol Production

2019 ◽  
Vol 4 (3) ◽  
pp. 158-162
Author(s):  
G Sinha ◽  
S Tiwari ◽  
S K Jadhav
Keyword(s):  
Plant Biomass ◽  
World Population ◽  
Bioethanol Production ◽  
Biological Pretreatment ◽  
Fermentation Efficiency ◽  
Hydrolysis Of Cellulose ◽  
Feedstock Availability ◽  
Hydrolysis Of ◽  
Rice Residues ◽  
Selection Of

Energy consumption has inflated steadily over the last century because the world population has fully grown and additional countries became industrialised. Bioethanol is an alcohol produced by fermentation of plant biomass, containing carbohydrate and its production depends upon feedstock availability, variability, and sustainability. The selection of feedstock and its pretreatment is an important part of bioethanol production process. In present work, the exploration of the potential of agro-waste rice residues such as, rice bran and rice husk was done, because it contains sufficient amount of carbohydrate which can be ferment into bioethanol. The aim of the research was also to investigate how different pretreatment methods with moderate conditions differ in hydrolysis and fermentation efficiencies. Pretreatment plays an important role in the hydrolysis of cellulose and lignocellulose. It was found that biological pretreatment was a most effective method in terms of production of bioethanol and it enhances the production as well as fermentation efficiency.

scholarly journals Microbial degradation of cellulosic material under intermediate-level waste simulated conditions

2015 ◽  
Vol 79 (6) ◽  
pp. 1433-1441 ◽  
Author(s):  
Naji M. Bassil ◽  
Alastair D. Bewsher ◽  
Olivia R. Thompson ◽  
Jonathan R. Lloyd
Keyword(s):  
Intermediate Level ◽  
Cellulosic Material ◽  
Lime Kiln ◽  
Chemical Hydrolysis ◽  
Hydrolysis Of Cellulose ◽  
Alkaline Conditions ◽  
Cellulose Fermentation ◽  
Alkali Hydrolysis ◽  
Hydrolysis Of ◽  
Isosaccharinic Acid

AbstractUnder the alkaline conditions expected in an intermediate-level waste repository, cellulosic material will undergo chemical hydrolysis. This will produce hydrolysis products, some of which can form soluble complexes with some radionuclides. Analyses of samples containing autoclaved tissue and cotton wool incubated in a saturated solution of Ca(OH)2 ( pH > 12) confirmed previous reports that isosaccharinic acid (ISA) is produced from these cellulose polymers at high pH. However, when inoculated with a sediment sample from a hyperalkaline site contaminated with lime-kiln waste, microbial activity was implicated in the enzymatic hydrolysis of cellulose and the subsequent production of acetate. This in turn led to acidification of the microcosms and a marked decrease in ISA production from the abiotic alkali hydrolysis of cellulose. DNA analyses of microbial communities present in the microcosms further support the hypothesis that bacterial activities can have a controlling influence on the formation of organic acids, including ISA, via an interplay between direct and indirect mechanisms. These and previous results imply that microorganisms could have a role in attenuating the mobility of some radionuclides in and around a geological disposal facility, via either the direct biodegradation of ISA or by catalysing cellulose fermentation and therefore preventing the formation of ISA.

Study on the Production of Fermentable Sugar by Use of Cellulose on Banana Peel

2013 ◽  
Vol 448-453 ◽  
pp. 761-764
Author(s):  
Zhong Xu ◽  
Xue Zhao ◽  
Ying Lin Ju
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Substrate Concentration ◽  
Banana Peel ◽  
Sugar Residue ◽  
Fermentable Sugar ◽  
Hydrolysis Of Cellulose ◽  
Enzyme Dosage ◽  
Hydrolysis Of ◽  
Research Efficiency

Banana peel is the main by-product in banana processing.A lot of banana waste are not disposeed in China every year.Used for degradation of cellulose on a banana peel and converted into fermentable sugars research. Efficiency of hydrolysis of cellulose to investigate the effect of factors: substrate concentration, reaction temperature, reaction time, enzyme dosage, pH. A single factor experiments the results: substrate concentration is 25%; the reaction time of 6h; reaction temperature of 50°C; the pH is 4.8;the amount of enzyme is 1%. Experimental results show that the application of enzymatic degradation of cellulose can be prepared banana fermentable sugar residue is feasible.

Hydrolysis of Cellulose to Produce Glucose in Ionic Liquid-Water Mixtures

2013 ◽  
Vol 634-638 ◽  
pp. 873-876 ◽  
Author(s):  
Tian Jiao Xu ◽  
Jin Yang Chen ◽  
Yi Mei Ji
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Liquid Water ◽  
Renewable Resource ◽  
Fuel Ethanol ◽  
Mass Ratio ◽  
Hydrolysis Of Cellulose ◽  
Benign Process ◽  
Hydrolysis Of

The lignocellulose is a widespread renewable resource. With the decrease of the petrochemical resources, lignocellulose is very important as an alternative resource to produce fuel ethanol. As for the conversion of cellulose into fuel ethanol, the saccharification of cellulose is a key process. The environment benign process using ionic liquid-water mixtures is studied to mild hydrolysis of cellulose to glucose without acid as catalyst. Ionic liquid of 1-allyl-3-methylimidazolium chloride ([Amim]Cl) is chosen to mix with water because it has great solubility of cellulose. The mass ratio of water with ionic liquid, reaction temperature and reaction time are studied and the optimal conditions of glucose yield are obtained as follows: the mass ratio of water 0.375, the reaction temperature 433 K and the reaction time 4h, and the yield of glucose is 77.08%.

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