title: Impact of disk milling on corn stover pretreated at commercial scale.
abstract: In cellulosic biofuel production, chemical pretreatment performed at laboratory or pilot scale, followed by mechanical refining, has been demonstrated to be effective to increase feedstock enzyme digestibility. To take the combined pretreatment process one step closer to commercialization, disk milling was performed with commercially pretreated corn stover. Dilute acid pretreated samples with combined severity factors (cSF) of 0.09 (DA09) and 0.43 (DA43) were obtained from a commercial plant. Effects of pretreatment conditions (DA09 and DA43), milling cycles (0, 3, 9, and 15) and enzyme dosages (7.8, 15.6 and 31.2mgcellulase/g dry biomass) were evaluated. Milling improved glucose yields by 0.7 to 1.2-fold. Higher enzyme dosages enhanced sugar yields. Milling was more effective to improve glucose yields, while enzyme dosage was more effective to improve xylose yields. However, dilute acid pretreatment condition was the most important factor to increase final sugar yields compared to milling cycles and enzyme dosages.
authors.affiliation: Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 1304 West Pennsylvania Avenue, Urbana, IL 61801, USA. Electronic address: kim843@illinois.edu.
authors.forename: Sun Min
authors.initials: SM
authors.lastname: Kim
authors.affiliation: Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 1304 West Pennsylvania Avenue, Urbana, IL 61801, USA. Electronic address: mtumbles@illinois.edu.
authors.forename: M E
authors.initials: ME
authors.lastname: Tumbleson
authors.affiliation: Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 1304 West Pennsylvania Avenue, Urbana, IL 61801, USA. Electronic address: krausch@illinois.edu.
authors.forename: Kent D
authors.initials: KD
authors.lastname: Rausch
authors.affiliation: Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 1304 West Pennsylvania Avenue, Urbana, IL 61801, USA. Electronic address: vsingh@illinois.edu.
authors.forename: Vijay
authors.initials: V
authors.lastname: Singh
mesh_terms: D000143:Acids / Q000737:chemistry / Q000494:pharmacology; D018533:Biomass; D002241:Carbohydrates / Q000737:chemistry; D003132:Commerce; D019649:Food Industry / Q000379:methods*; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis / Q000187:drug effects; D014994:Xylose / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry* / Q000187:drug effects
chemical_list: D000143:Acids; D002241:Carbohydrates; D014994:Xylose; D005947:Glucose
keywords: Commercial scale; Corn stover; Disk milling; Mechanical refining; Pretreatment