title: Effect of dilute acid pretreatment severity on the bioconversion efficiency of Phalaris aquatica L. lignocellulosic biomass into fermentable sugars.
abstract: The effect of dilute acid pretreatment severity on the bioconversion efficiency of Phalaris aquatica lignocellulosic biomass into fermentable sugar monomers was studied. The pretreatment conditions were expressed in a combined severity factor (CSF), ranged from 0.13 to 1.16. The concentration of xylose and total monomeric sugars released from hemicellulose increased with pretreatment as the CSF increased. Dilute acid pretreatment resulted in about 1.7-fold increase in glucose release relative to the untreated biomass, while CSF was positively correlated with glucose recovery. A maximum glucose yield of 85.05% was observed at high severity values (i.e. CSF 1.16) after 72 h. The total amount of sugars released (i.e. xylose and glucose) was increased with pretreatment severity and a maximum conversion efficiency of 76.1% of structural carbohydrates was obtained at a CSF=1. Our data indicated that Phalaris aquatica L. is an alternative bioethanol feedstock and that hemicellulose removal promotes glucose yield.
authors.affiliation: Chemical Process Engineering Research Institute, LPRE, 6th km Harilaou Thermi Road, 57001 Thessaloniki, Greece; Aristotle University, Department of Forestry and Natural Environment, Range Ecology Laboratory, 54124 Thessaloniki, Greece. Electronic address: pappas@cperi.certh.gr.
authors.forename: Ioannis A
authors.initials: IA
authors.lastname: Pappas
authors.affiliation: Aristotle University, Department of Forestry and Natural Environment, Range Ecology Laboratory, 54124 Thessaloniki, Greece.
authors.forename: Zoi
authors.initials: Z
authors.lastname: Koukoura
authors.affiliation: Aristotle University, School of Agriculture, Apiculture-Sericulture Laboratory, 54124 Thessaloniki, Greece.
authors.forename: Chrisoula
authors.initials: C
authors.lastname: Tananaki
authors.affiliation: Idras 33, 55236 Panorama, Thessaloniki, Greece.
authors.forename: Christos
authors.initials: C
authors.lastname: Goulas
mesh_terms: D018533:Biomass; D003246:Conservation of Energy Resources; D005285:Fermentation; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D031783:Phalaris / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013464:Sulfuric Acids / Q000737:chemistry
chemical_list: D011134:Polysaccharides; D013464:Sulfuric Acids; C036909:lignocellulose; C007916:hemicellulose; D008031:Lignin; C033158:sulfuric acid
keywords: Cell wall; Enzymatic hydrolysis; Hemicellulose removal; Phalaris aquatica; Pretreatment severity