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Effects of synergistic fungal pretreatment on structure and thermal properties of lignin from corncob
Bioresource Technology ( IF 11.4 ) Pub Date : 2018-10-02 , DOI: 10.1016/j.biortech.2018.09.145
Tingting You , Xin Li , Ruizhen Wang , Xueming Zhang , Feng Xu

Synergistic fungal pretreatment involving white-rot and brown-rot fugal pretreatment has shown great potential for enhancing the yield of sugars from biomass time-effectively and environmentally benign. In this work, the effects of this integrated fungal pretreatment on lignin characteristics and thermal behavior of corncob were examined in the view of whole plant valorization. The results show that an efficient deconstruction of lignin was achieved by white-rot fungus, and subsequent brown-rot fungus promoted the preferential breakdown of guaiacyl units, further enhancing lignin extraction efficiency (62.3%). Consequently, less phenolic hydroxyl, methoxyl, tricin, ester-linked p-coumaric acid, more carboxylic acid, ratio of syringyl to guaiacyl units, β-O-4′ linkage and molecular weight were found in W-BL. Thermal stability was improved and the increased phenol and alkyl-phenols contents in pyrolysis products demonstrated that synergistic fungal pretreatment definitely improved the lignin oil quality. These discoveries provide new insights into set strategy for microbial screening, pretreatment and lignin processing.



中文翻译:

协同真菌预处理对玉米芯木质素结构和热性能的影响

涉及白腐病和褐腐病真菌的协同真菌预处理显示出巨大的潜力,可以在时间和环境方面对生物质提高糖的收率。在这项工作中,从整个植物的增值角度研究了这种综合真菌预处理对玉米芯木质素特性和热行为的影响。结果表明,白腐真菌可实现对木质素的有效解构,随后的棕腐真菌促进了愈创木脂单元的优先降解,进一步提高了木质素的提取效率(62.3%)。因此,更少的酚羟基,甲氧基,甘油三酸酯,酯连接的p在W-BL中发现了-香豆酸,更多的羧酸,丁香基与愈创木基单元的比例,β-O-4'键和分子量。热稳定性得到改善,并且热解产物中苯酚和烷基酚含量的增加表明,协同真菌预处理确实改善了木质素油的质量。这些发现为微生物筛选,预处理和木质素加工的固定策略提供了新见解。

更新日期:2018-10-02
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