title: Persulfate based pretreatment to enhance the enzymatic digestibility of rice straw.
abstract: Oxidation induced by potassium persulfate was evaluated as an economic substitute for the Fenton-like reaction for the purpose of rice straw pretreatment in terms of temperature (80-140°C), potassium persulfate concentration (5-100mM) and process time (0.5-3h), an optimal pretreatment condition was identified: 120°C for 2 h with 75mM potassium persulfate concentration and yielded 91% enzymatic digestibility using 25.2FPU/g of biomass. Crystallinity index, SEM and SEM-EDS analyses revealed that biomass was indeed disrupted and components like silica were exposed. All this suggested that this persulfate-based pretreatment method, which is distinctively advantageous in terms of effectiveness and economics, can indeed be a competitive option.
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Muhammad Ajaz
authors.initials: MA
authors.lastname: Ahmed
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Yeong Hwan
authors.initials: YH
authors.lastname: Seo
authors.affiliation: Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil.
authors.forename: Ruly
authors.initials: R
authors.lastname: Terán-Hilares
authors.affiliation: Department of Chemical Engineering, COMSATS Institute of Information Technology, Lahore, Pakistan.
authors.forename: Muhammad Saif U R
authors.initials: MSUR
authors.lastname: Rehman
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea. Electronic address: hanj2@kaist.ac.kr.
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Han
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D004798:Enzymes / Q000737:chemistry / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism*; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D017680:Potassium Compounds / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*; D013696:Temperature
chemical_list: D004798:Enzymes; D017680:Potassium Compounds; D013431:Sulfates; C009007:potassium persulfate
keywords: Enzymatic hydrolysis; Oxidative pretreatment; Rice straw; Structural features