氧化预处理对香蕉秸秆性质和结构的影响
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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%.
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%.
引文
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[2] 陈厚彬.第九届国际香蕉改良网络亚太区咨询委员会会议看亚太区和中国的柑桔与亚热带果树信息[J].柑橘与亚热带果树信息,2000,(3): 6-8.
[3] 陈蓉,等.香蕉假茎营养成分的分析[J].湛江师范学院学报(自然科学版), 2000,(02): 12-15.
[4] Taherzadeh M, K Karimi. Pretreatment of Lignocellulosic Wastes to Improve Ethanol and Biogas Production:A Review[J].International Journal of Molecular Sciences,2008,9(9): 1621.
[5] Li C, et al. Fresh banana pseudo-stems as a tropical lignocellulosic feedstock for methane production[J]Energy Sustainability Society, 2016,6(1): 27.
[6] 裴培,等.物理法处理对香蕉秸秆沼气发酵能力影响分析[J].食品与发酵工业,2014,40(1): 8-13.
[7] 周谈龙,等.木质纤维素预处理工艺研究现状及展望[J].安徽农业科学,2014,42(18): 5920-5923.
[8] 王翀.提高香蕉(Musa sapientum Linn.)秸秆厌氧消化性能的预处理方法及工艺研究[D]. 长沙:湖南农业大学,2015.
[9] 王俊丽,等.DNS法测定还原糖含量时最适波长的确定[J].河南农业科学, 2010,(04): 115-118.
[10] Soest V,J P.Use of detergents in the analysis of fibrous feeds. 2. A rapid method for the determination of fiber and lignin[J].Journal Association of Official Analytical Chemists,1963,49:546-551.
[11] Zhou M,et al.Enhanced volatile fatty acids production from anaerobic fermentation of food waste: A mini-review focusing on acidogenic metabolic pathways[J]. Bioresource Technology, 2017:248.
[12] 郭翰林.纤维素超分子结构及其降解过程的表征分析[D].济南:山东大学,2012.
[13] 贾丽丽.木质纤维素材料氨水预处理及其酶水解特性研究[D].杨凌:西北农林科技大学,2013.
[14] 朱圆圆,等.两步碱法预处理对玉米秸秆组分及结构的影响[J].中国科技论文,2015,(12): 1376-1381.