Peroxide−acetic acid pretreatment to remove bagasse lignin prior to enzymatic hydrolysis / Tan, He in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1473–1479 Titre : Peroxide−acetic acid pretreatment to remove bagasse lignin prior to enzymatic hydrolysis Type de document : texte imprimé Auteurs : Tan, He, Auteur ; Yang, Rallming, Auteur ; Sun, Weidong, Auteur Année de publication : 2010 Article en page(s) : pp 1473–1479 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Peroxide-acetic acid Enzymatic hydrolysis. Résumé : This paper presents results on the features of bagasse pretreatment with peroxide and acetic acid (peroxide−HAc) aiming at selective removal of lignin to enhance enzymatic hydrolysis. Surface response methodology was employed to study the effects of major process parameters on delignification and to establish a model for the prediction of lignin removal in the process. Enzymatic hydrolysis following the pretreatment was conducted to evaluate the enhancement of biohydrolysis by the pretreatment. Results revealed that peroxide−HAc pretreatment of bagasse retained most of the carbohydrate constituents, although the delignification rate was low. Peroxide−HAc concentration, temperature, and time demonstrated significant effects on bagasse lignin removal. The relationship between lignin removal and the process parameters could be well described by a mathematical model derived from the experimental data. After treatment with 69.1% peroxide−HAc at 80 °C for 26.5 h, 97.08% of lignin could be removed while keeping 68.24% hemicelluloses intact. Over 93.58% of carbohydrate in treated bagasse could be hydrolyzed with exoglucanase in a dosage of 138 FPU/g carbohydrates at 35 °C within 48 h. It was thus demonstrated that treated bagasse has a much higher response toward enzymatic hydrolysis than its untreated counterpart. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901529q [article] Peroxide−acetic acid pretreatment to remove bagasse lignin prior to enzymatic hydrolysis [texte imprimé] / Tan, He, Auteur ; Yang, Rallming, Auteur ; Sun, Weidong, Auteur . - 2010 . - pp 1473–1479. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1473–1479 Mots-clés : Peroxide-acetic acid Enzymatic hydrolysis. Résumé : This paper presents results on the features of bagasse pretreatment with peroxide and acetic acid (peroxide−HAc) aiming at selective removal of lignin to enhance enzymatic hydrolysis. Surface response methodology was employed to study the effects of major process parameters on delignification and to establish a model for the prediction of lignin removal in the process. Enzymatic hydrolysis following the pretreatment was conducted to evaluate the enhancement of biohydrolysis by the pretreatment. Results revealed that peroxide−HAc pretreatment of bagasse retained most of the carbohydrate constituents, although the delignification rate was low. Peroxide−HAc concentration, temperature, and time demonstrated significant effects on bagasse lignin removal. The relationship between lignin removal and the process parameters could be well described by a mathematical model derived from the experimental data. After treatment with 69.1% peroxide−HAc at 80 °C for 26.5 h, 97.08% of lignin could be removed while keeping 68.24% hemicelluloses intact. Over 93.58% of carbohydrate in treated bagasse could be hydrolyzed with exoglucanase in a dosage of 138 FPU/g carbohydrates at 35 °C within 48 h. It was thus demonstrated that treated bagasse has a much higher response toward enzymatic hydrolysis than its untreated counterpart. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901529q

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