title: RT-CaCCO process: an improved CaCCO process for rice straw by its incorporation with a step of lime pretreatment at room temperature.
abstract: We improved the CaCCO process for rice straw by its incorporation with a step of lime pretreatment at room temperature (RT). We firstly optimized the RT-lime pretreatment for the lignocellulosic part. When the ratio of lime/dry-biomass was 0.2 (w/w), the RT lime-pretreatment for 7-d resulted in an effect on the enzymatic saccharification of cellulose and xylan equivalent to that of the pretreatment at 120°C for 1h. Sucrose, starch and β-1,3-1,4-glucan, which could be often detected in rice straw, were mostly stable under the RT-lime pretreatment condition. Then, the pretreatment condition in the conventional CaCCO process was modified by the adaptation of the optimized RT lime-pretreatment, resulting in significantly better carbohydrate recoveries via enzymatic saccharification than those of the CaCCO process (120°C for 1 h). Thus, the improved CaCCO process (the RT-CaCCO process) could preserve/pretreat the feedstock at RT in a wet form with minimum loss of carbohydrates.
authors.affiliation: National Food Research Institute, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
authors.forename: Riki
authors.initials: R
authors.lastname: Shiroma
authors.forename: Jeung-yil
authors.initials: JY
authors.lastname: Park
authors.forename: Muhammad Imran
authors.initials: MI
authors.lastname: Al-Haq
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Arakane
authors.forename: Masakazu
authors.initials: M
authors.lastname: Ike
authors.forename: Ken
authors.initials: K
authors.lastname: Tokuyasu
mesh_terms: D002118:Calcium / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D008049:Lipase / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry*; D013696:Temperature
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C016538:lime; D008049:Lipase; D002118:Calcium