Spectroscopic evidence for hyperthermophilic pretreatment intensifying humification during pig manure and rice straw composting

文献类型： 外文期刊

第一作者： Cao, Yun

作者： Cao, Yun;Huang, Hongying;Sun, Enhui;Xu, Yueding;Zhang, Jing;Chang, Zhizhou;Cao, Yun;Huang, Hongying;Sun, Enhui;Xu, Yueding;Zhang, Jing;Wang, Jidong;Butterly, Clayton;He, Huan

作者机构：

关键词： Humification process; FT-IR; C-13 NMR; Organic waste; Precursors

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2019 年 294 卷

页码：

收录情况： SCI

摘要： Hyperthermophilic pretreatment composting (HPC) is superior to traditional composting (CK) with shortened maturity period and enhanced humification degree. However, the chemical and structural evolution of humic substances (HS) at the molecular level is not known. In this study, the impact of hyperthermophilic pretreatment (90 degrees C, 4 h) on the content and chemical composition of HS during composting were investigated. The HS content of the final compost was 87.8 g/kg and 76.7 g/kg in HPC and CK, respectively. Significantly higher humic acid/fulvic acid ratio (1.27 in HPC v.s. 0.77 in CK) was observed in HPC. C-13 NMR spectroscopic data showed a higher aromatics percentage and earlier enrichment of aromatic structures in HS extracted from HPC than CK. Intensified humification of HPC was related to the increased levels of HS precursors and degradation of lignocellulose. Redundancy analysis demonstrated that aromatic C, phenolic C and O-alkyl C can be used for evaluation of the humification degree.

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