Pretreatment of olive tree biomass with FeCl3 prior enzymatic hydrolysis

• Published in: Bioresource technology Vol. 128; pp. 180 - 187
• Main Authors: López-Linares, Juan C., Romero, Inmaculada, Moya, Manuel, Cara, Cristóbal, Ruiz, Encarnación, Castro, Eulogio
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.01.2013; Elsevier
• Subjects: Biological and medical sciences; Biotechnology; Cellulase - chemistry; Chlorides - chemistry; Combined severity; Enzymatic hydrolysis; FeCl3 pretreatment; Ferric Compounds - chemistry; Fundamental and applied biological sciences. Psychology; Glucose - chemical synthesis; Hydrolysis; Industrial Waste - prevention & control; Olea; Olea - chemistry; Olive tree biomass; Polysaccharides - chemistry; WIS; CR0; GRL; CS0; YWIS; HSRL; Olive tree biomass; Enzymatic hydrolysis; Combined severity; GRS; HSRS; FeCl3 pretreatment; OTB; YEH; R0; SR; Oleaceae; Olea europaea; FeCl; Iron III Chlorides; Biomass; Hydrolysis; Dicotyledones; Angiospermae; Enzymatic digestion; Spermatophyta; Pretreatment; Oil plant (vegetal)
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2012.10.076

► Olive tree biomass is a potential feedstock for the production of bioethanol. ► Pretreatment of olive tree biomass with FeCl3 was assessed. ► Yields are better than those reported for this feedstock using other pretreatment methods. Olive tree biomass (OTB) is an agricultural residue which can be used as raw material for bioethanol production. OTB was pretreated with 0.05–0.275M FeCl3 solutions at 120–180°C for 0–30min. Enzymatic hydrolysis yields were used for assessing pretreatment performance. Optimum FeCl3 pretreatment conditions were found to be 152.6°C, 0.26M FeCl3 for 30min. Under such conditions, 100% of hemicellulose was removed, and enzymatic hydrolysis of pretreated solids resulted in a yield of 36.6g glucose/100g of glucose in the raw material. Hemicellulosic sugar recovery in the prehydrolysate was 63.2%. Results compare well with those obtained by other pretreatment strategies on the same raw material, confirming FeCl3 solutions as a new, feasible approach for bioethanol production.