title: Comparison of saccharification process by acid and microwave-assisted acid pretreated swine manure.
abstract: The saccharification process of swine manure by conventional and microwave-assisted acid pretreated were investigated using cellulose enzymes, respectively. The optima for microwave-assisted acid pretreated swine manure is achieved when swine manure of 50 g l(-1) of substrate concentration and water amount 40 ml was pretreated by 4% H2SO4 concentration with 445 W microwave powers for 30 min at pretreatment period, and temperature 50 degrees C, enzyme loading 2 mg g(-1) substrate, substrate concentration 5 g l(-1) and initial medium pH 4.8 at enzymes hydrolysis period by microwave-assisted acid pretreated, respectively. The optimal conditions by conventional acid pretreated is obtained when 50 g l(-1) swine manure was submerged in 40 ml, 4% H2SO4 maintained at 130 degrees C for 3 h at pretreatment period, and temperature 45 degrees C, enzyme loading 2 mg g(-1) substrate, substrate concentration 15 g l(-1) and initial medium pH 5.2 at enzymes hydrolysis period, respectively. Under the optimum conditions microwave-assisted acid pretreatment could achieve higher yield of reducing sugar, short reaction time, and lower energy consumption than from the conventional acid pretreatment, which indicates that microwave-assisted acid pretreatment is more suitable for swine manure pretreatment than by acid alone.
authors.affiliation: College of Resources and Environment, Southwest University, 400716, Chongqing, China. lijingmxr@yahoo.com.cn
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Fan
authors.initials: F
authors.lastname: Jiang
authors.forename: Juan
authors.initials: J
authors.lastname: Ling
authors.forename: Maochang
authors.initials: M
authors.lastname: Liu
authors.forename: Feilai
authors.initials: F
authors.lastname: Yan
authors.forename: Jingjing
authors.initials: J
authors.lastname: Xu
mesh_terms: D000818:Animals; D002241:Carbohydrates / Q000737:chemistry*; D008372:Manure; D008872:Microwaves; D013464:Sulfuric Acids / Q000737:chemistry*; D013552:Swine
chemical_list: D002241:Carbohydrates; D008372:Manure; D013464:Sulfuric Acids; C033158:sulfuric acid