Liquid HotWater Pretreatment and Enzymatic Hydrolysis as a Valorization Route of Italian Green Pepper Waste to Delivery Free Sugars
Metadatos
Afficher la notice complèteAuteur
Martín Lara, María Ángeles; Chica Redecillas, L.; Pérez Muñoz, Antonio; Blázquez García, Gabriel; García García, G; Calero De Hoces, Francisca MónicaEditorial
Mdpi
Materia
Pretreatment Hydrolysis Italian green pepper Liquid hot water Fermentable sugars Glucose Xylose Food waste
Date
2020-11-10Referencia bibliográfica
Martín-Lara, M. A., Chica-Redecillas, L., Pérez, A., Blázquez, G., Garcia-Garcia, G., & Calero, M. (2020). Liquid Hot Water Pretreatment and Enzymatic Hydrolysis as a Valorization Route of Italian Green Pepper Waste to Delivery Free Sugars. Foods, 9(11), 1640. [doi:10.3390/foods9111640]
Résumé
In this work, liquid hot water pretreatment (autohydrolysis) was used to improve
enzymatic hydrolysis of a commonly consumed vegetable waste in Spain, Italian green pepper,
to finally produce fermentable sugars. Firstly, the e ect of temperature and contact time on sugar
recovery during pretreatment (in insoluble solid and liquid fraction) was studied in detail. Then,
enzymatic hydrolysis using commercial cellulase was performed with the insoluble solid resulting
from pretreatment. The objective was to compare results with and without pretreatment. The results
showed that the pretreatment step was e ective to facilitate the sugars release in enzymatic hydrolysis,
increasing the global sugar yield. This was especially notable when pretreatment was carried out
at 180 C for 40 min for glucose yields. In these conditions a global glucose yield of 61.02% was
obtained. In addition, very low concentrations of phenolic compounds (ranging from 69.12 to
82.24 mg/L) were found in the liquid fraction from enzymatic hydrolysis, decreasing the possibility
of fermentation inhibition produced by these components. Results showed that Italian green pepper
is an interesting feedstock to obtain free sugars and prevent the enormous quantity of this food waste
discarded annually.