氧化预处理对香蕉秸秆性质和结构的影响  

Effects of Different Persulfate Pretreatments on the Properties and Structure of Banana Straw

作　　者：刘研萍[1] 袁彧 陈丽萍 尹晓彤 李秀金[1] 邹德勋[1] LIU Yan-ping;YUAN Yu;CHENG Li-ping;YIN Xiao-tong;LI Xiu-jin;ZOU De-xun(Department of Environmental Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学环境科学与工程系,北京100029

出　　处：《中国沼气》2019年第1期54-59,共6页China Biogas

基　　金：国家科技支撑计划(2015BAD21B03)

摘　　要：文章利用1%的过二硫酸钾、过硫酸铵以及过硫酸钠对香蕉秸秆进行预处理,研究预处理后还原糖浓度和VFAs随时间的变化,分析研究3种过硫酸盐预处理对香蕉秸秆结构的变化。结果表明,3种过硫酸盐预处理后,还原糖产量均有提高,且在第12 h达到峰值,过二硫酸钾预处理后的香蕉秸秆还原糖产量最高,达到7341.79 mg·L^(-1);VFAs浓度在16 h均有明显提高,过二硫酸钾处理效果最佳,在第20 h达到最高值743.93 mg·L^(-1)。过硫酸盐预处理对纤维素、半纤维素和木质素有较高的破坏作用,纤维表面和细胞壁受到破坏,孔洞增加;过硫酸钠效果最佳,纤维素和木质素降解率分别达到48.48%和30.19%。过硫酸盐预处理可以增加香蕉秸秆的可生物降解性。Banana straw was pretreated respectively by adding potassium peroxydisulfate,ammonium persulfate and sodium persulfate with a concentration of 1%.The changes of reduced sugar concentrations and VFAs with time after pretreatment were investigated,and the banana straw structure after pretreatment was studied as well.The results showed that the yields of reduced sugar all increased after the 3 kind of persulfate pretreating,and they reached the peak at 12 h.Potassium peroxydisulfate pretreatment obtained the highest reduced sugar yield,reaching 7341.79 mg·L^-1.The VFAs concentration was significantly increased at 16 h after pretreatment,and the potassium peroxydisulfate was the best,reaching the highest value of 743.93 mg·L^-1 at the 20 h.The persulfate pretreatment had a high destructive effect on cellulose,hemicellulose and lignin,the surface and cell walls of the fiber were damaged and the pores increased,the effect of sodium persulfate was the best,and the degradation rates of cellulose and lignin reached 48.48.%and 30.19%.

关 键 词：预处理 过硫酸盐 香蕉秸秆 

分 类 号：S216.4[农业科学—农业机械化工程] X712[农业科学—农业工程]