title: Pilot scale dilute acid pretreatment of rice straw and fermentable sugar recovery at high solid loadings.
abstract: The aim of this work was to study the dilute acid pretreatment of rice straw (RS) and fermentable sugar recovery at high solid loadings at pilot scale. A series of pretreatment experiments were performed on RS resulting in >25wt% solids followed by enzymatic hydrolysis without solid-liquid separation at 20 and 25wt% using 10FPU/g of the pretreated residue. The overall sugar recovery including the sugars released in pretreatment and enzymatic hydrolysis was calculated along with a mass balance. Accordingly, the optimized conditions, i.e. 0.35wt% acid, 162°C and 10min were identified. The final glucose and xylose concentrations obtained were 83.3 and 31.9g/L respectively resulting in total concentration of 115.2g/L, with a potential to produce >50g/L of ethanol. This is the first report on pilot scale study on acid pretreatment of RS in a screw feeder horizontal reactor followed by enzymatic hydrolysis at high solid loadings.
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
authors.forename: Manali
authors.initials: M
authors.lastname: Kapoor
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
authors.forename: Shveta
authors.initials: S
authors.lastname: Soam
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
authors.forename: Ruchi
authors.initials: R
authors.lastname: Agrawal
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
authors.forename: Ravi P
authors.initials: RP
authors.lastname: Gupta
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India.
authors.forename: Deepak K
authors.initials: DK
authors.lastname: Tuli
authors.affiliation: DBT-IOC Centre for Advance Bioenergy Research, Research & Development Centre, Indian Oil Corporation Limited, Sector-13, Faridabad 121007, India. Electronic address: kumarr3@indianoil.in.
authors.forename: Ravindra
authors.initials: R
authors.lastname: Kumar
mesh_terms: D000143:Acids / Q000737:chemistry; D002241:Carbohydrates / Q000737:chemistry*; D003246:Conservation of Energy Resources / Q000379:methods; D000431:Ethanol / Q000737:chemistry; D005285:Fermentation; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis; D012275:Oryza / Q000737:chemistry*; D010865:Pilot Projects; D014994:Xylose / Q000737:chemistry
chemical_list: D000143:Acids; D002241:Carbohydrates; D000431:Ethanol; D014994:Xylose; D005947:Glucose
keywords: Enzymatic hydrolysis; Fermentable sugars; Mass balance; Pilot scale; Pretreatment; Rice straw