Influence of alkaline pre-treatments on the cell wall components of wheat straw

Sun, Run‐Cang; Lawther, J. M.; Banks, W. B.

doi:10.1016/0926-6690(95)00025-8

Cited by 271 publications

(150 citation statements)

References 22 publications

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“…Biological pretreatment of bamboo culms with white rot fungi has been performed at low temperature (25 0 C) [26]. A study conducted by Singh et al, [27] indicates that Aspergillus terreus reduces the cellulose content of lignocellulosic material by about 55.2% while delignification was found to be about 92%. Enzymatic hydrolysis Table 5.…”

Section: Biological Pretreatmentmentioning

confidence: 99%

Bioethanol Production from Lignocellulosic Waste-A Review

Mohanty¹,

Abdullahi²

2016

Biosci., Biotech. Res. Asia

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Petroleum and other fossil fuel has been the main energy source for a long period of time in human life. Through these energy sources, the world has been a developing and industrializing entity. However, it is agreed that these traditional sources of energy cannot remain forever as they are non-renewable. Many experts predicted that oil production will keep on decreasing, as the present oil wells keep on decreasing and fewer oil reserves are discovered. This led to increasing price of the minerals and eventually makes them economically unsustainable. As such, renewable source of energy has to be sourced. Bioethanol; a renewable energy source is being produced from food materials such as sugar cane, maize etc. However, if these are to be used for energy production, the world will be entering into another crisis as they will be competed for food and energy. Lignocellulosic wastes such as Rice straw, Wheat straw, Corn straw and Bagasse contain same sugar molecules for bioethanol production as such can be used to generate renewable energy using appropriate physical, chemical and biological techniques. This paper aims at exploring the process of bioethanol production from lignocellulosic wastes.

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Section: Biological Pretreatmentmentioning

confidence: 99%

Bioethanol Production from Lignocellulosic Waste-A Review

Mohanty¹,

Abdullahi²

2016

Biosci., Biotech. Res. Asia

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“…The predicted wood dissolution, and temperature at this point were 33.53% (standard deviation 0.36) and 96.46˚C (standard deviation 0.69) respectively. The yield of xylan, wood dissolution, and temperature of the slurry obtained [17] reported that a low temperature alkaline extraction of wheat provided 76.4% of xylan, when wheat straw was treated with 1.5% NaOH at solid loading of 2.5% dry matter for 144 hours at room temperature. It is clear that great reduction in the extraction time can be obtained using microwave assisted extraction for a similar yield of xylan.…”

Section: Optimization Of Microwave Assisted Extraction Of Xylan and Vmentioning

confidence: 99%

“…Higher alkali loading, and lower temperatures for extraction were reported as the preferred conditions for the extraction of high molecular weight oligomers [16]. However, low temperature needs prolonged duration for considerable extraction of hemicelluloses [17,18]. Microwave heating technology is known to be a cleaner and efficient alternative to the conventional heating mode to accelerate chemical reactions and has been widely used in various applications such as synthesis of polymers, curing of rubbers or polymers, liquefaction of wood etc.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Microwave Assisted Alkaline Extraction of Xylan from Birch Wood Using Response Surface Methodology

Panthapulakkal¹,

Sain²

2013

MSCE

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The main purpose of this study was to optimize microwave assisted alkaline extraction of the hemicellulose, xylan, from birch wood. The simultaneous effects of process variables such as time (10 -30 minutes), concentration of sodium hydroxide solution (4 -8 wt%), solid to liquid ratio (1:8 to 1:20, g:mL), and sample size (5 -10 g) on the temperature of the wood slurry, wood dissolution, and yield of extraction were evaluated. A central composite design (CCD) and response surface methodology (RSM) were used for the optimization of the extraction process. Based on the CCD, quadratic models were developed to correlate the extraction process variables with the responses such as temperature of wood slurry, wood dissolution, and yield of xylan and the models were analyzed using appropriate statistical methods (ANOVA). Statistical analysis showed that all the models developed were found to be adequate for the prediction of the respective responses. Optimization of the process was performed using a numerical optimization available in the software to maximize the yield of xylan and the optimum process variables for the maximum yield of xylan was found to be: 10 g of wood fibres, 8 wt% of NaOH solution, 1:10 solid to liquid ratio (g:mL) and 25 minutes of irradiation time. About 72.5% of the xylan present in the birch wood was extracted using the optimized extraction parameters.

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“…Sodium hydroxide makes the biomass to swell through solvation and saponification reactions, increases the porosity of the material thus increases enzymatic hydrolysis rate [7]. Effective delignification and chemical swelling of the fibrous cellulose [10,86], cause condensation of lignin and modification of the crystal structure, which can introduce unwanted effects for lignin removal and cellulose degradation [34,50]. Therefore alkaline pretreatment has been studied on different types of lignocellulosic biomass contain ing switchgrass, corn stover, rice straw, wheat straw, and rice hulls [92], the majority of the investigate on alkaline pretreatment has focused on optimization of the process parameters to improve substrate digestibility [92,59].…”

Section: Alkalimentioning

confidence: 99%

Pretreatments to Enhance the Digestibility of Wheat Straw

Zahoor

2014

IJRSE

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Abstract:Wheat straw is a sufficient agricultural by-product with a low market price. The biofuel produced from lignocellulosic material exhibits energetic, economic and environmental benefits in contrast to bio-ethanol from starch or sugar. Until now, physical and chemical difficulty caused by the close connection of the main components of lignocellulosic biomass, discourage the hydrolysis of cellulose and hemicellulose to fermentable sugars. The main purpose of pretreatment is to enhance the enzyme accessibility improving digestibility of cellulose. Every pretreatment has a particular effect on the fraction of cellulose, hemicellulose and lignin, thus different pretreatment methods and conditions should be selected for the development of subsequent hydrolysis and fermentation steps. This paper reviews the most importance technologies for ethanol production from lignocellulose and its represent several vital qualities that should be marked for low-price and promote pretreatment processes.

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Influence of alkaline pre-treatments on the cell wall components of wheat straw

Cited by 271 publications

References 22 publications

Bioethanol Production from Lignocellulosic Waste-A Review

Bioethanol Production from Lignocellulosic Waste-A Review

Optimization of Microwave Assisted Alkaline Extraction of Xylan from Birch Wood Using Response Surface Methodology

Pretreatments to Enhance the Digestibility of Wheat Straw

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