comparative study on chemical pretreatment (acid and ozone) methods for improving enzymatic digestibility of sugar cane bagasse
نویسندگان
چکیده
sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. so it is can be used as a sugar source in many processes. lignin and hemicellulose must be removed before hydrolysis of cellulose. several different pretreatment approaches have been studied. the purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatment methods for improving enzymatic digestibility of sugar cane bagasse in pilot plant scale. sugar cane bagasse was washed and pretreated by sulfuric acid (ba) 0.1 %, sodium hydroxide (bsh) 0.1% and (bs) steam was done at pressure 2 bar. sugar cane bagasse was also treated by sulfuric acid (1, 2, 2.5, and 5%) at 121 º c and 151 º c. ozone and ozone-acid methods also was used for delignification of bagasse. particle diameter of bagasse in all pretreatment methods was 3-4 mm. all pretreated bagasse was hydrolyzed by cellulose enzyme complex and beta-gluocosidase at ph 5 and temperature 45ºc. glucose and xylose content of hydrolyzed sample was analyzed by high performance liquid chromatography (hplc). acid is the best media for pretreatment of bagasse in comparison with steam and base. the data showed that high concentration of acid had indirect effect on yield of sugar production in hydrolysis step. furthermore ozonolysis pretreatment of bagasse led to higher amount of glucose in comparison with acid and acid-ozone methods. moisture content and duration of ozonation had significant effect on sugar content of hydrolyzed solution and sugar content of hydrolyzed samples was 6 %.
منابع مشابه
Comparative study on chemical pretreatment (acid and ozone) methods for improving enzymatic digestibility of sugar cane bagasse
Sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. So it is can be used as a sugar source in many processes. Lignin and hemicellulose must be removed before hydrolysis of cellulose. Several different pretreatment approaches have been studied. The purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatme...
متن کاملComparative study on chemical pretreatment (acid and ozone) methods for improving enzymatic digestibility of sugar cane bagasse
Sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. So it is can be used as a sugar source in many processes. Lignin and hemicellulose must be removed before hydrolysis of cellulose. Several different pretreatment approaches have been studied. The purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatme...
متن کاملComparative study on chemical pretreatment (acid and ozone) methods for improving enzymatic digestibility of sugar cane bagasse
Sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. So it is can be used as a sugar source in many processes. Lignin and hemicellulose must be removed before hydrolysis of cellulose. Several different pretreatment approaches have been studied. The purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatme...
متن کاملComparative Studies on Effect of Pretreatment of Rice Husk for Enzymatic Digestibility and Bioethanol Production
Three common pretreatment processes based on dilute sulfuric acid, dilute sodium hydroxide and heat treatment (autoclaving) followed by enzymatic hydrolysis were evaluated to provide comparative performance data. Among them, the best result was obtained when the pretreatment of rice husk was carried out with 3% of NaOH solution. The pretreatment of rice husk with NaOH substantially increased th...
متن کاملEffect of ionic liquid pretreatment on the chemical composition, structure and enzymatic hydrolysis of energy cane bagasse.
Ionic liquids (ILs) are promising solvents for the pretreatment of lignocellulose as they are thermally stable, environmentally friendly, recyclable, and have low volatility. This study evaluated the effect of 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]) for the pretreatment of energy cane bagasse in terms of biomass composition, structural changes and enzymatic digestibility. Energy cane ...
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عنوان ژورنال:
journal of food and bioprocess engineeringجلد ۱، شماره ۲، صفحات ۶۹-۷۴
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