| Titre : | Peroxide−acetic acid pretreatment to remove bagasse lignin prior to enzymatic hydrolysis (2010) |
| Auteurs : | Tan, He, Auteur ; Yang, Rallming, Auteur ; Sun, Weidong, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 4, Fevrier 2010) |
| Article en page(s) : | pp 1473–1479 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | 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 |
