Optimization of Alkali Pretreatment from Steam Exploded Barley Husk to Enhance Glucose Fraction Using Response Surface Methodology

Alkali pretreatment of wheat straw was optimized by response surface methodology to maximize yields of fermentable sugars in subsequent enzymatic hydrolysis and to remove maximum lignin in order to improve rheological attributes of the media. The effects of pretreatment conditions on biomass properties were studied using the Expert Designer software. Concentration of sodium hydroxide and temperature were the factors most affecting pretreatment efficiency. At the optimum (80°C, 39 min, 0.18 g NaOH and 0.06 g lime per g of raw biomass), 93.1 ± 1.0% conversion of cellulose to glucose after enzymatic hydrolysis and 80.3 ± 1.2% yield of monosaccharides (glucose plus xylose and arabinose) from cellulose and hemicellulose of wheat straw were achieved.

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Impact of surfactant assisted acid and alkali pretreatment on lignocellulosic structure of pine foliage and optimization of its saccharification parameters using response surface methodology

Bioresource Technology ◽

10.1016/j.biortech.2015.04.054 ◽

2015 ◽

Vol 192 ◽

pp. 115-125 ◽

Cited By ~ 30

Author(s):

Ajay Kumar Pandey ◽

Sangeeta Negi

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Alkali Pretreatment ◽

Surfactant Assisted

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Optimizing Alkali Pretreatment of Oil Palm Empty Fruit Bunch for Ethanol Production by Application of Response Surface Methodology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.622-623.117 ◽

2012 ◽

Vol 622-623 ◽

pp. 117-121 ◽

Cited By ~ 3

Author(s):

Sairudee Duangwang ◽

Chayanoot Sangwichien

Keyword(s):

Response Surface Methodology ◽

Reaction Time ◽

Response Surface ◽

Reaction Temperature ◽

Oil Palm ◽

Low Cost ◽

Raw Material ◽

Temperature Reaction ◽

Empty Fruit Bunch ◽

Alkali Pretreatment

Oil palm empty fruit bunch (OPEFB) is a potential source of cellulose which can serve as a promising raw material for the production of ethanol. The increasing interest on use of lignocellulosic waste for bioconversion to fuels and chemicals are justifiable as these materials are low cost, renewable and widespread sources of sugars. The objective of the present study was to determine the effect of NaOH concentration, reaction temperature and reaction time for alkali pretreatment to increase the amount of cellulose for hydrolysis to achieve high glucose yield. Batch reactions were carried out under various reaction temperature, reaction time and NaOH concentration. Response Surface Methodology (RSM) was followed to optimize the alkali pretreatment in order to obtain high amount of cellulose (%). The optimum reaction temperature, reaction time and NaOH concentration were found to be 130 ˚c, 40 min and 15% (w/v), respectively. The maximum value of cellulose was obtained 68.8% by using the above condition. 19.96 g/L glucose was achieved when reaction was carried out at 130 ˚c for time period of 90 min when 6% (w/v) of H2SO4 concentration maintained.

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