Details

Autor(en) / Beteiligte

• López-Linares, Juan C
• Ballesteros, Ignacio
• Tourán, Josefina
• Cara, Cristóbal
• Castro, Eulogio
• Ballesteros, Mercedes
• Romero, Inmaculada

Titel

Optimization of uncatalyzed steam explosion pretreatment of rapeseed straw for biofuel production

Ist Teil von

• Bioresource technology, 2015-08, Vol.190, p.97-105

Ort / Verlag

England

Erscheinungsjahr

2015

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Rapeseed straw constitutes an agricultural residue with great potential as feedstock for ethanol production. In this work, uncatalyzed steam explosion was carried out as a pretreatment to increase the enzymatic digestibility of rapeseed straw. Experimental statistical design and response surface methodology were used to evaluate the influence of the temperature (185-215°C) and the process time (2.5-7.5min). According to the rotatable central composite design applied, 215°C and 7.5min were confirmed to be the optimal conditions, considering the maximization of enzymatic hydrolysis yield as optimization criterion. These conditions led to a maximum yield of 72.3%, equivalent to 81% of potential glucose in pretreated solid. Different configurations for bioethanol production from steam exploded rapeseed straw were investigated using the pretreated solid obtained under optimal conditions as a substrate. As a relevant result, concentrations of ethanol as high as 43.6g/L (5.5% by volume) were obtained as a consequence of using 20% (w/v) solid loading, equivalent to 12.4g ethanol/100g biomass.